﻿{"Bibliographic":{"Title":"Southwest Fisheries Center Monthly Report: April 1975","Authors":"","Publication date":"1975","Publisher":"Southwest Fisheries Center (U.S.)"},"Administrative":{"Date created":"06-26-2025","Language":"English","Rights":"CC 0","Size":"0007131158"},
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    "content": "T OF C\nDEPAR\nERCE\n*\nUNITED\nMER\nED STATES OF\nAM\nHONOLULU\nLA JOLLA\nTIBURON\nSOUTHWEST FISHERIES CENTER\nRECEIVED JUN 1 6 1975\nMONTHLY REPORT - APRIL 1975\nTIBURON MARINE LABORATORY\nRESEARCH HIGHLIGHTS\nPage\nPublications\n7\nAlbacore Oceanography Cruise Slated on Newly\nReactivated NOAA Research Vessel Cromwell 4\nTagged Silver Salmon Recovered\n6\nLow Oxygen Levels Studied as Possible Barriers\nto Tuna Movements 8\nAll NMFS Porpoise Observer Trips Completed During\n1975 Open Tuna Fishing Season 10\nResearch on Effects of Aromatic Hydrocarbons on\nMarine Organisms Nears Completion 11\nTuna Vessels Weather and XBT Reporting Rate is Up 13\nExperiments to Establish Suitability of Dinoflagellate for First-Feeding Anchovy Larvae Initiated 14\nNSF Researcher at SWFC Studies Behavior of Larval Fish\nand Their Prey Utilizing Schlieren Optical System 16\nSampling Properties of MARMAP Bongo Nets and CalCOFI Standard Net to be Evaluated . 20\nPlan Submitted to IOC for Future Oceanic Surveys Off Peru to Analyze Impact of \"El Nino\" 22\nRecommendations Made on Future Direction of Honolulu Laboratory Baitfish Project . 23\nNOAA/NMFS\nSOUTHWEST FISHERIES CENTER LA JOLLA, CALIFORNIA\nHONOLULU LABORATORY LA JOLLA LABORATORY TIBURON LABORATORY\nMONTHLY REPORT - APRIL 1975\nSTATUS OF PUBLICATIONS\nPublished\nClark, N. E., L. Eber, R. M. Laurs, J. A. Renner, and J. F. T. Saur. 1974. Heat exchange between ocean and atmosphere in the eastern North Pacific for 1961-71. NOAA Tech. Rep. NMFS SSRF-682,108 p.\nSummaries of large-scale heat exchange between ocean and atmos- phere in the eastern North Pacific Ocean are presented for the period 1961 through 1971. The summaries are based on computations made from synoptic marine radio weather reports and include 1) monthly values of total heat exchange and departures from a long-term mean; 2) long-term monthly mean values of the total heat exchange, incoming solar radiation, effective back radiation, and evaporative and sensible heat transfer; and 3) annual cycles of total heat exchange for selected areas.\nOutstanding spatial and temporal features of the heat exchange values are discussed. However, little detail is given since this is a summary report, and readers can draw their own conclusions depending upon the intended use of the charts.\nComparisons are also made between the total heat exchange values and those given in two other reports. Discrepancies between values given in this report and those published in the other reports are attributed to differences in the empirical equations used to make the heat exchange computations, differences in data processing techniques, differences in the observed data used in the computa- tions due to difference methods of acquisition, and the possibility of ocean climate changes.\nThis report does not constitute publication and is for information only.\nHobson, Edmund S. 1975. First California record of the serranid fish Anthias gordensis Wade. Calif. Fish Game, 61(2): 111-112.\nThis paper reports the first record of this sea bass species to be collected in California (and U. S. ) waters.\nGreen, Roger E. 1975. A preliminary list of fishes collected from Richardson Bay, California. Calif. Fish Game, 61(2): 104-106.\nThis paper gives a preliminary list of fishes collected in Richardson Bay (part of the San Francisco Bay system) from June 1972 to July 1973. Sampling methods are described for the difference life stages collected: eggs and larvae, juveniles and adult fishes. Two species on the list have not been reported previously from San Francisco Bay: roughtail skate (Raja trachura) and white seabass (Cynoscion nobilis).\nMiller, Forrest R. and R. Michael Laurs. 1975. The El Nino of 1972- 1973 in the eastern tropical Pacific Ocean. Inter-Am. Trop. Tuna Comm. Bull., 16(5): 403-448.\nBeginning in February 1972 the usual seasonal cooling of the surface water of the eastern Pacific Ocean in the region of the Peru Current and along the equator failed to develop. By July tropical coastal and equatorial island stations and ships crossing the equator were recording sea-surface temperatures which were 6° to 8ºF (3.3º-4.4℃) above the long-term mean. The anomalies spread over most of the eastern tropical Pacific and westward into the central equatorial Pacific through September. During October, surface temperatures at coastal stations along South America were returning to normal, but in November and December 1972 temperatures rose rapidly again, with a near-record temperature anomaly of 81ºF (4.2℃) above the long-term mean recorded at Puerto Chicama, Peru (7º42'S,79º27'W). After January 1973 sea surface temperatures began returning rapidly to normal over most of the eastern tropical Pacific, and by March 1973 the El Nino had completed its cycle.\nMonthly sea-surface temperature anomalies over the eastern tropical Pacific are discussed to show the extent and magnitude of warming. Annual temperature profiles at several South American coastal and equatorial island stations are compared with temperature profiles for the 1957-1958 and 1965 El Nino year. Characteristics of the temperature anomaly profiles at Puerto Chicama during several very warm years for the 1925-1972 period are also compared. Finally, meteorological factors contributing to a relaxation of the south- east trade winds and to the decreased upwelling along the coast of South America in 1972-1973 are examined.\n2\nShomura, Richard S., and Francis William (editors). 1975. Proceedings of the International Billfish Symposium, Kailua-Kona, Hawaii, August 9-12, 1972, Part 1. Report of the Symposium. U. S. Dep. Commer., Natl. Mar. Fish. Serv., Spec. Sci. Rep. Fish. 675, 33p.\nSkillman, Robert A. 1975. An assessment of the South Pacific albacore, Thunnus alalunga, fishery, 1953-72. U. S. Natl. Mar. Fish Serv., Mar. Fish Rev. 37(3): 9-17. (MFR Paper 1127).\nFrom the mid-1960's through the early 1970's, markedly increased effort expended in the South Pacific albacore, Thunnus alalunga (Bonnaterre), fishery was met with a decline of more than 60% in apparent abundance. Further increases in harvesting pressure are proposed. These factors have prompted an assessment of the fishery. Based on the generalized production model of Pella and Tomlinson, a 25% increase in fishing effort over the 1971 level will result in either a small increase in catch or a substantial decline, depending on the measure of fishing effort used.\nTranslation\nSuisan Shuho. 1975. The life blood of the skipjack tuna pole-and-line fishery - The problem of baitfish (anchovy) mortality (Katsuo ippon zuri no seimeisen - Katakuchi tairyo-shi no wadai wo otte). Suisan Shuho (The Fishing and Food Industry Weekly) 731: 16-17. January 25, 1975. (Translated from Japanese by Tamio Otsu, 1975, 4 p., Transla- tion No. 11) [Limited distribution.]\nApproved by Center Director\n\"DDT and its metabolites in the sediments off Southern California\" by John S. MacGregor. For publication in the Fishery Bulletin, U.S.\n\"Behavior and survival of northern anchovy Engraulis mordax larvae\" by John R. Hunter. For publication in the Symposium in Fisheries Biology, Ensenada, B. C., Mexico.\n\"Early life history studies of eastern Pacific carangids\" by Elbert H. Ahlstrom and Barbara Y. Sumida. For publication in the Symposium in Fishery Biology, Ensenada, B. C., Mexico.\n\"Acclimation and rearing of striped bass larvae in sea water\" by Krishan Lal, Reuben Lasker and Andrew Kuljis. For publication in California Fish and Game.\n3\nALBACORE FISHERIES INVESTIGATIONS\n. .\nAlbacore Oceanography Cruise Slated on Newly Reactivated NOAA Research Vessel Cromwell\nPreparations are underway for a 17 day albacore oceanography cruise aboard the NOAA research vessel, Townsend Cromwell, June 16 to July 10. Messrs. R. Lynn, Cruise Leader, accompanied by K. Bliss, T. Mulitauaopele, and R. Dotson of the Albacore-Oceanography project at the La Jolla Labor- atory will participate. This cruise will take advantage of the transfer of the Cromwell to Kewalo Basin, Honolulu after its recent reactivation in Seattle, Washington.\nThe Seattle-Honolulu track needs only a small modification to permit a repeat of the central transect (40° to 30°N along 137°30'W) of the offshore albacore surveys conducted in the three preceeding years (1972- 74) at this same time of year. According to Oceanographer Lynn, the objectives of this cruise are 1) to collect oceanographic data to further evaluate the relationships between oceanographic features and the early seasonal distribution and apparent abundance of albacore tuna in offshore waters, as indicated by American Fishermen's Research Foundation charter vessels and independent fishing vessels catches; 2) to measure the lo- cation and strength of the subtropic and subarctic fronts associated with the boundaries of the Transition Water between the Pacific Subarctic and North Pacific Central Water masses; 3) to gather data across the California Current to make estimates of momentum and transport. In addi- tion, a limited effort will be made to transport several live albacore to Kewalo Basin for physiological experiments.\nMr. Lynn is preparing detailed cruise plans. Salinity-temperature-depth (STD) casts to 1,000 meters will be conducted along the entire track from Seattle to Honolulu if time permits.\nMr. Lynn plans to concentrate major effort along the 137º30'W transect; trolling will be conducted along this entire transect (Cromwell will lay-to during the hours of darkness), STD stations will be spaced at 46 km intervals and neuston tows will be conducted at every other station. Daily radio communications will be maintained with four fishing vessels on charter to the American Fishermen's Research Foundation and with independent fishing vessels to exchange fishing, oceanographic, and weather information as needed. Radio communications will be conducted with Western Fishboat Owner's station WHG for coordination with the charter operation control. Outside of the 137º30'W transect stations will be spaced at 74 km intervals.\n4\nExpendable bathythermographs (XBT) will be dropped at each station for a comparative study of STD-XBT temperature depth traces. Arrangements will be made with the Ship-of-Opportunity Program of the NMFS Pacific Environmental Group at Tiburon, California for extended coverage on the mainland to Honolulu tracks and, if possible, with NORPAX at the Scripps Institution of Oceanography for extended coverage on their transPacific XBT runs.\nBiological Technician R. Dotson is making all arrangements for acquiring and assembling fishing gear and for installation of fishing booms on the Cromwell.\nNMFS-AFRF Continue Cooperative Albacore Research Studies\nDr. R. M. Laurs, Oceanographer in charge of the Albacore Fisheries program, reports that during the 1975 albacore season, the American Fishermen's Research Foundation (AFRF) will charter seven fishing vessels in the cooper- ative NMFS/AFRF exploratory fishing and research program. Four of the vessels are slated to leave San Diego on or about June 1 to work in the early-season offshore fishery. Two of these four vessels will carry NMFS observers. In addition to the exploratory fishing these vessels will tag all albacore in prime condition for a study of migration patterns, keep detailed logs on fish catches, fish measurements, and sea conditions and make two expendable bathythermograph casts per day. Daily radio reports will be made to the AFRF radio station, WHG, or WWD, the Commerce-licensed radio station at the Scripps Institution of Oceanography. Radio communi- cations will also be maintained with the NOAA research vessel Townsend Cromwell for exchange of information.\nIn addition to the offshore studies, three charter fishing vessels will conduct albacore scouting and research activities in nearshore waters during the 1975 albacore fishing season. The purposes of the study are 1) to locate commercial concentrations of fish for the fishing fleet;\n2) to conduct tagging operations for the study of albacore movements; and\n3) to make oceanographic observations for evaluation of the influence of the physical marine environment upon the relative abundance of albacore. Two of three vessels will carry NMFS observers.\nCOASTAL FISH COMMUNITIES INVESTIGATIONS\nFood Available to Nearshore Fishes Assessed\nAt the Tiburon Marine Laboratory, Dr. Edmund Hobson, Project Leader, and Fishery Biologist Tony Chess of the nearshore fish communities project, this month completed their regular quarterly sampling of the biota at six representative nearshore habitats: 1) giant kelp bed, 2) rocks overgrown\n5\nwith low brown algae, 3) rocks overgrown with low red algae ( in surge zone) , 4) rocks overgrown with coralline algae, 5) sand overgrown with low brown algae (anchored on worm tubes), and 6) open sand. Assessments are based on visual counts along established transect lines and samples made with dredge, air-lift, nets and spears.\nResident fishes, with emphasis on recreational species, are among the organisms sampled in each habitat. Study of the gut contents of these fishes demonstrates which of the organisms present in each habitat are in fact consumed by the fishes.\nCOASTAL FISHERIES INVESTIGATIONS\nDemand Grows for Pelagic Red Crab to Color Flesh of Pen-reared Salmon\nThe pelagic red crab (Pleuroncodes planipes) has proved to be a valuable feed supplement for cultured salmon. Pen-rearing of salmon is growing rapidly as a commercial aquaculture venture in the Pacific Northwest. The carotenid pigments found in red crabs contribute heavily to the coloration of salmon flesh which would otherwise remain pale when fed only regular fish food.\nFishery Biologist Susumu Kato reports that the vessel Lady Olga left port late this month on another trip to catch red crabs in international waters off southern Baja, California. The entire catch has been sold in advance to two salmon rearers. Two more trips are contemplated in May and June to fulfill current demand for the crabs. NMFS has been instrumental in getting this fishery started.\nTagged Silver Salmon Recovered\nThe Salmon Rearing and Release Task is a cooperative program involving the Tiburon Laboratory, Sea Grant, California Department of Fish and Game, and the Tyee Club, a sportfishermen's organization. The objective is to rear salmon in salt water pens for release into San Francisco Bay to supplement the recreational fishery catch. Task Leader Susumu Kato and Lloyd Richards, Biological Technician, report that the first year's rearing phase ended on November 6, 1974, when about 4,000 200 gm fish were released. All fish were marked with a coded wire tag in the nose and a clipped adipose fin. In addition, about 600 fish were tagged with an external tag (Floy anchor tag. )\n6\nOn March 30, one of our externally tagged silver salmon was recaptured by an angler at the Berkeley Marina - almost directly across the Bay from where it was released. During its 5-1/2 months at liberty the tagged salmon had grown 5-1/2 inches in length and about a pound and a half in weight - a remarkable growth considering growth is usually slower in salmon during winter.\nThe angler who caught the tagged fish reported having caught a smaller salmon in February and possibly a larger individual which broke the line in March. Recovery of the externally tagged salmon lends further credence to the reported catch of the two small salmon at the Berkeley Marina in December.\nFeed conversion studies are continuing with four tanks of silver salmon. Initial attempts to convert directly from Oregon Moist Pellets (OMP) to dry pellets were not successful as the fish reduced their feed intake markedly.\nThis month several combinations of OMP and dry pellets were tried to induce greater consumption. In addition, the dry pellets were moistened prior to feeding. Results indicate that texture rather than differences in taste or smell is the principal factor contributing to differences in feed uptake.\nAnglers' Guide to the United States Pacific Coast\nThis month the Anglers' Guide, co-authored by James Squire, Fishery Biologist at La Jolla and Susan Smith, Publications Specialist at Tiburon, was submitted to the Center Director for approval. The Guide described marine game fish, fishing grounds and angler facilities along the west coast of the United States from California to Alaska, and around the tropical islands of Hawaii, American Samoa, and Guam.\nThe fishing chart information was sent to NOAA's Visual Services Branch in Rockville, Maryland, so that cartographers can begin the task of adding information to the 40 base charts. Miss Smith also prepared a large lay- out form (bluefin flat) and submitted it to G.P.O. in San Francisco for printing. These forms will eventually be used for galley paste-up of the book.\n7\nFISH ENVIRONMENTAL INVESTIGATIONS\nLow Oxygen Levels Studied as Possible Barriers to Tuna Movement\nRates of success of purse seining have been related to the characteristics of the thermocline. Where the thermocline is shallow and dramatic, purse seining is generally more effective. Low temperatures and oxygen levels and high turbidity associated with the thermocline have been suggested as acting as effective barriers to escape through the unpursed net. Mr. Randolph K. C. Chang and Dr. Andrew E. Dizon have initiated experiments designed to determine how effective temperature, oxygen, salinity, and turbidity discontinuities are to voluntary movement of tuna.\nTo date they have completed the low oxygen study. To do this a small oval tank (6' x 8' x 2' deep) was attached to a 24' diameter x 4' deep holding tank. A small hatch (2' x 2') allowed movement between the residence tank and the treatment tank. A pair of kawakawa were trained to swim into the small tank for food rewards and the time spent in the small tank was continously recorded. The fish tested together for two (control treatment and test treatment) 20 min periods every other day. Control treatment oxygen levels were greater than 5.5 ppm and test treatment levels were less than 2.1 ppm. The fish were fed at 20 sec intervals while in the test tank.\nThe fish spent less time in the test tank at low oxygen levels than at high. At low oxygen levels, swimming speed was slower and feeding was less aggre- ssive. Also, some stress was exhibited at low levels by a darker coloration and a display of ventral spots. Behavior at high oxygen levels in the test tank was indistinguishable from that in the residence tank. During the 13 days of testing, the fish entered the test tank 516 times during the 20 min low oxygen treatments and 479 times during the control treatments. However, the fish spent a significantly greater amount of time in the test tank at high oxygen levels than at low (53% vs. 34%). Maximum time spent feeding in the test tank ranged from 0.5 to 2.0 min (0.9 min median) at low levels and from 0.8 to 3.3 min (2.0 min median) at high levels.\nAlthough the fish will tolerate a median of only 0.9 min exposure to oxygen levels less than 2.1 ppm, this would seem to be ample time for a fish to escape from the deepest seine. Skipjack tuna have been demonstrated to swim at speeds from a minimum of about 0.9 length/sec to 20 lengths/sec for short bursts. Depending upon motivation and metabolic reserves, then, a 50 cm tuna could swim from 24 to 540 m in an 0.9 min period.\n8\nSkipjack Tuna Swimming Behavior Unaffected by Salinity Gradients in Behavioral Thermoregulation Tank\nThe Honolulu Laboratory's Experimental Ecology of Tunas group, under the leadership of Dr. Dizon, has as its long-range goal the generation of a predictive model of tuna distribution. Input to the model includes the functional relationships between swimming activity (speed and turning tendency) and environmental parameters (temperature, salinity, oxygen, food particles, and odors, etc. ). The group has observed the effects of temperature, salinity, and food particle gradients on swimming behavior of the three species of tunas held at Kewalo Basin. The work has been accomplished in the partially operational behavioral thermoregulation tank, which is designed primarily to measure the temperature preference of free- swimming tunas.\nTwo studies are in progress in the tank. 1) Skipjack tuna are being tested with salinity gradients of about 0.075 ppt/min. At swimming speeds of 1.5 lengths/sec for a 45 cm fish, this salinity gradient is equivalent to 0.002 ppt/m horizontal gradient. Paired fish samples are tested for a period of 3 days. For experimental fish the salinity is reduced with fresh water starting at noon each day. Fresh water is allowed to enter the tank for 1 hour; recovery of normal salinity takes about 5 hours. For control fish the procedure is the same except that salt water is used instead of fresh. Eight skipjack tuna have been tested to date and preliminary results in- dicate no response to the generated salinity gradients. 2) In a joint study with Dr. John Bardach (Hawaii Institute of Marine Biology), the effect of food odors on the swimming behavior of tunas is also being determined. Most tuna tested showed a small but significant change in swimming behavior on introduction of the odorants. Current tests should show whether feeding will make the responses more marked.\n* *\nFEI Leader Dr. Richard A. Barkley reported routine work on manuscripts, including manuscript review. He supplied ORSOM, Noumea, with a printout of data from his Oceanographic Atlas of the Pacific showing averaged temperatures, salinities, and density in the upper 500 m for use in their work on surface currents in the southwestern Pacific.\nMARINE MAMMALS\nOperations Research Analyst Joins Porpoise/Tuna Program at La Jolla Laboratory\nDr. David Au, Operations Research Analyst, entered on duty with the Porpoise/Tuna Program at the La Jolla Laboratory April 28. Dr. Au, who\n9\nreceived his Ph.D. from Oregon State University in 1971, transferred to the Southwest Fisheries Center from the NMFS Northeast Fisheries Center in Woods Hole, Massachusetts where he was in charge of their program on larval herring ecology.\nDr. Au will work with Dr. William Lenarz, Leader of the Porpoise/Tuna Program in evaluating the entire fishing process in terms of effective effort on porpoise and tuna stocks. His first specific assignment is to analyze and evaluate effects of gear modification in reducing incidental mortality of porpoise taken in the eastern tropical Pacific yellowfin tuna fishery.\nAccount of NMFS Porpoise Research Presented to Members of American Cetacean Society\nThe first of a series of meetings intended to acquaint and inform inter- ested individuals and groups on research conducted by the staff of the Porpoise/Tuna Program at the La Jolla Laboratory, as mandated by the provisions of the Marine Mammal Protection Act of 1972, was held in the auditorium of the Southwest Fisheries Center on April 11.\nChaired by SWFC Deputy Director Robert F. Scott, presentations of on- going work in progress were made to 18 members of the American Cetacean Society. Dr. William Fox, leader of the SAFE Investigations, provided general background on the aims and objectives of the program, Dr. William Perrin talked about his research on the life histories of the porpoise species involved in the fishery, and Dr. Tim Smith talked about how popu- lation estimates of porpoise were derived.\nAll NMFS Porpoise Observer Trips Completed During 1975 Open Tuna Fishing Season\nAn important component of the NMFS research program on porpoise/tuna interaction in the eastern tropical Pacific is the data collected by NMFS observers who accompany U. S. tuna seiners to collect vital statistics on porpoises killed incidentally in tuna seining operations. As of this writing, 16 observer trips were completed before the closure of the Commission Yellowfin Regulatory Area (CYRA) to unrestricted fishing on March 13; four more observers have returned since that time. A total of 31 observers have been placed aboard U. S. tuna seiners this year.\nAshore, the porpoise/tuna and data management staff at the La Jolla Laboratory devoted considerable effort to editing and processing set logs from the first 16 observations. According to Dr. William Lenarz, in charge of the Porpoise/Tuna Program, the work has not been completed. This was the first real test of the new data management system and the system performed extremely well.\n10\nSmall Cetacean Research Proposal Prepared for FAO\nDr. W. Perrin, Fishery Biologist at the La Jolla Laboratory, was at the Smithsonian Institution, Washington, D. C., April 1-8, to partici- pate in the preparation of a FAO Advisory Committee on Marine Resources Research (ACMRR) proposal for research on small cetaceans. The proposal was researched and written by a five man subcommittee of the ACMRR Advisory Group on Small Cetaceans. The other members of the subcommittee are Drs. S. Holt, FAO; E. D. Mitchell, Canada; T. Kasuya, Japan; and R. L. Brownell of the U. S.\nTesting of \"Porpoise Aprons\" Continues\nDesigned by Mr. R. McNeely and his staff of gear experts at the NMFS Northwest Fisheries Center in Seattle, Washington, the porpoise apron is a long, tapered strip of webbing that is fitted into tuna purse seines between the corkline and the Medina panel and is inserted in the backdown area. Conceptually, the tapered webbing forms a ramp over which the por- poises can be backed out without risk of submerging the corkline too deeply. Thus the fishermen can free the captured porpoise while retaining the fish in the seine. In addition to the seven aprons installed earlier in vessels whose captains had volunteered to test the new gear, two addi- tional aprons have been put in nets under the supervision of Mr. Jerry Jurkovich of the Northwest Fisheries Center. Two more aprons have been fabricated and await installation.\nOn return from their current fishing trips, the fishing captains who have had porpoise aprons installed in their nets will provide detailed infor- mation to NMFS for evaluation of apron performance in reducing porpoise mortality. Also, porpoise observers on board two of the vessels with the porpoise aprons will collect additional information on the performance of the aprons.\nPHYSIOLOGY INVESTIGATIONS\nResearch on Effects of Aromatic Hydrocarbons on Marine Organisms Nears Completion\nDuring April, investigators in the Physiology program at the Tiburon Laboratory concentrated their efforts on completing manuscripts and re- maining experiments on the effects of aromatic hydrocarbons on marine organisms.\n11\nFishery Biologist Sid Korn, Biological Technician Nina Hirsch, and Jeannette Struhsaker, Chief, Physiology Investigations, report that two manuscripts describing experiments on the uptake, distribution and depuration of C14 labelled benzene in three species of fish (Morone saxitilis, Engraulis mordax, and Clupea harengus pallasi) were completed and are currently being reviewed. Work continued on another paper by Research Chemist Pete Benville and Fishery Biologist Sid Korn on the acute toxicity of six aromatic crude oil components to striped bass and bay shrimp. The chronic effects of xylene on Pacific herring embryos and larvae are described in a manuscript completed this month by authors Maxwell Eldridge, Jeannette Struhsaker and Tina Echeverria.\nContinous flow bioassays exposing adult herring to benzene were begun by Research Chemist Pete Benville. The toxicity level for 24 hours was 1-3 ppm. The 96 hour concentration is not yet determined. These preliminary results show continous flow exposure to benzene to be 3 to 4 times more toxic than static exposures.\nIn recent years, the marine rotifer, Brachionus plicatilis, has been used as a food organism in the culture of fish larvae. In experiments studying the bioenergetics of fish larvae exposed to aromatic hydrocarbons, investi- gators monitored the uptake and accumulation of benzene at slower rates, but to much higher levels and no depuration occurred during sampling periods up to eight days. Biological Technician Tina Echeverria began the fifth in a series of experiments to determine the level of maximum benzene accumulation. Rotifers are being exposed to daily doses of 100 ppb and 1 ppm concentration of C 4 labelled benzene. After the asymptotic benzene concentration is determined the depuration of residual benzene in the rotifers will be monitored.\nSTOCK ASSESSMENT AND FISHERY EVALUATION INVESTIGATIONS\nOceanographic Data from Tuna Vessels to be Edited for Computerized Data Base\nMr. Ken Brennecke, Computer Technician at the La Jolla Laboratory, began working on a computer program to edit the existing data base containing expendable bathythermograph (XBT) observations and weather observations from tuna vessels. The computer program will automatically eliminate duplicate and spurious observations from the data, thus reducing the amount of labor time required in preparation of data analysis.\nArrangements were also made for acquiring from NORPAX, magnetic tapes containing XBT data for the entire Pacific which have been collected\n12\nby the U. S. Navy's Fleet Numerical Weather Central, Monterey, California, since the early 1960's. The XBT profiles from this source will supplement those collected by tuna vessels since 1971, and will help to \"fill in the gaps\" where sparsity of data has proved a hindrance to reliable ocean thermal structure analysis. The summarization of all existing XBT obser- vations by 1° squares and by month will begin soon. Further examination of the relationship between fishing success and ocean thermal structure will be facilitated by this new data.\nTuna Vessels Weather and XBT Reporting Rate is Up\nDuring April a total of 17 U. S. tuna vessels fishing in the eastern tropical Pacific participated in the radio weather reporting program of the Real-Time Fishing Systems Task at the La Jolla Laboratory. Substantial quantities of both weather and XBT observations were recorded.\nApril Reporting Rates\nWeather Observations\nXBT Observations\nTotal\n1974\n297\n42\n339\n1975\n328\n81\n409\n% Increase\n+9%\n+48%\n+17%\nYear-to-Date\nWeather Observations\nXBT Observations\nTotal\n1974\n937\n154\n1,091\n1975\n1,047\n217\n1,264\n% Increase\n+11%\n+29%\n+14%\nData Base System for Tuna Data Designed\nMathematician Al Coan and Computer Technician Ken Brennecke are continuing work on designing tuna length-frequency and catch-effort data bases for the Atlantic Ocean. Flow diagrams for processing, editing and entering data have been completed and total catches by year, area, and country have been placed on cards. Length frequencies from the U. S. purse seine catch and French-Ivory Coast-Senegalese purse seine catch have also been placed on cards. During editing of these data, prototype data bases using edited portions of these data are being used to test the efficiency and design of the data bases.\n13\nMr. Ted Murphy, a recent graduate of Colorado State University, has joined the staff of the Stock Assessment Task at the La Jolla Laboratory as a Fishery Biologist. At Colorado State University, Mr. Murphy worked on analytical methods for identifying subpopulations of cutthroat trout in the Yellowstone National Park. In his new assign- ment at the La Jolla Laboratory he will be involved in stock assessment of Atlantic tunas.\nSTOCK AND RECRUITMENT INVESTIGATIONS\nProject Begun to Evaluate Starvation as Cause of Mortality in Jack Mackerel Larva\nFishery Biologist Gail Theilacker of the La Jolla Laboratory began a project this month to evaluate starvation as a cause of mortality in jack mackerel larvae. Jack mackerel are of major importance in the California wetfish fishery. The major objective of Ms. Theilacker's study is to establish histological criteria for estimating the extent of starvation in sea-caught jack mackerel larvae. Once these criteria are established, sea-caught larvae will be examined to determine the incidence of starvation. This work should greatly improve our understanding of the causes of larval mortality and therefore the relationships between stock size and recruitment. The first step in her work will be to establish starvation criteria through laboratory experimentation. She plans to collect jack mackerel eggs at sea and rear the larvae in the laboratory under controlled conditions. Ms . Theilacker will employ histological techniques to determine normal cellular growth in larvae at various stages of development and compare these samples to those taken from larvae that have been starved.\nExperiments to Establish Suitability of Dinoflagellate for First-Feeding Anchovy Larvae Initiated\nExperiments have been initiated this month by Dr. Edward Scura, Physiologist at the La Jolla Laboratory, to establish the suitability of the dinoflagel- late, Gonyaulax polyedra, as a food for first-feeding anchovy larvae. Data collected by Dr. Lasker during the past several months indicates that there was a rich layer of G. polyedra extending along the California coast from Point Conception to San Diego during the time of heavy anchovy spawning. Proper size for first-feeding anchovy larvae but little is known about the suitability of this phytoplankton as a larval food. Preliminary experiments indicate that although anchovy larvae readily feed on this organism, growth\n14\nand survival is reduced when compared to larvae fed the dinoflagellate, Gymnodinium splendens. G. splendens is routinely used at the La Jolla Laboratory as a food for first-feeding larvae and it was the predominant organism in the chlorophyll maximum along the coast of the Los Angeles Bight during the spring of 1974.\nPlankton Microstructure in Coastal Waters off California to be Investigated\nIn April, Dr. Robert Owen, Oceanographer at the La Jolla Laboratory, began organizing an investigation of plankton microstructure in coastal waters off California. This work is essential for an understanding of the sur- vival of anchovy larvae and other larval fish. Food studies in the sea and in the laboratory indicate that the average food density in this area will not support life of larval fishes. Consequently, the survival of larval fishes depend on the patchiness of the food distribution, that is, on plankton microstructure.\nDr. Owen has thus far chaired two meetings dealing with technical and scientific aspects of studying the microstructure of the food for larval fishes. The objective of the meetings was to initiate planning of a multiple-ship effort to measure small-scale plankton distributions and mechanisms of phytoplankton and zooplankton patchiness, co-patchiness of species, and association of fish larvae with higher density zones of food- sized particles.\nIn connection with this proposed study, parts for a water sampler system for sampling at 20 cm intervals vertically were obtained from Joris Gieskes of Scripps Institution of Oceanography. A new frame is being designed so that close-spaced samples can be obtained from mid-water depths, expec- ially in the vicinity of the chlorophyll maximum zone.\nDr. John Hunter, Fishery Biologist and Ms. Carol Sanchez, Biological Technician, continued their work on the feeding ecology of Pacific mackerel. As a first step in these studies they are examining the effect of prey size on feeding success of mackerel. They also began work on rearing Pacific mackerel at 16℃ to complete a study of the effect of temperature on growth of mackerel.\nDr. Hunter completed a manuscript entitled, \"Behavior and survival of northern anchovy (Engraulis mordax) larvae\". This paper is a contribution to a symposium on fishery science held in Ensenda, Mexico in February 1975. The paper discusses how the behavior of anchovy is affected by biotic and abiotic factors and how these interrelationships are related to growth and survival.\n15\nNSF Researcher at SWFC Studies Behavior of Larval Fish and Their Prey Utilizing Schlieren Optical System\nThrough a grant from the Oceanography Section of the National Science Foundation (NSF) to the Regents of the University of California, Dr. John H. Taylor, principal investigator under the NSF grant, with the cooperation of Drs. Reuben Lasker and John Hunter of the La Jolla Laboratory, has begun work on a large-aperture Schlieren optical system that will permit obser- vation and recording of behavioral patterns of transparent marine organisms that are normally difficult to see or to photograph in sea water. The Schlieren system will be used in studies of the behavior of larval fish and their prey at the Southwest Fisheries Center.\nThe optical system will be based on a pair of 12 inch concave mirrors that allow a sample area of more than 750 cm2 to be studied. By the use of this large field it will be possible to see and record the movements of larval fish and their prey over relatively long action paths and in a relatively unconfined space so that behavior is not significantly modified by the apparatus. Organisms in the range from 1 centimeter down to 50 microns. or less should be resolved by the system.\nPreliminary studies made at the Southwest Fisheries Center suggest that the Schlieren system may be modified to give images that may be color-coded according to the degree of refraction produced by the organisms, and the device may be modified to give three-dimensional photographs as well. Further, it will be possible to visualize or photograph the occurrence of temperature and salinity gradients and the organism's response to them.\nNOAA Research Associate Reports Advances in Work on the Biology of Young Stages of Squid\nDr. Ann Hurley, NOAA Research Associate at the La Jolla Laboratory, reports she has now maintained the commercially important squid, Loligo opalescens, in the laboratory from the time of hatching to a maximum age of 100 days.\nDuring this time the squid were fed primarily upon brine shrimp nauplii and adult brine shrimp. This diet was supplemented with larval anchovies and larval mackerel. Contrary to previous reports for other species, young squid readily attached a wide size range of prey. Newly hatched Loligo attached brine shrimp nauplii (~0.7 mm), adult Artemia (~8.0 mm) , and larval fish (~5.0 mm). Feeding rates were calculated for squid in terms of percent body weight eaten per day.\n16\nAverage results are:\nWeek\n% Body weight/day\n1\n53\n2\n54\n3\n55\n4\n44\n5\n41\n6\n74\n7\n50\n8\n115\n9\n72\nExamples of feeding rates are: newly hatched squid: 108 Artemia nauplii/ squid/day; 4 week old squid: 43 anchovy larvae/squid/day; 4 week old squid: 302 Artemia nauplii/squid/day.\nGrowth in the laboratory was very similar to growth previously published for the adults. Growth can be described by the equation:\nMantle length = 1.98 + 0.081 age (in days)\nThe length to weight relationship takes the following form:\nLog weight = - 1.22 + 2.37 log length\nRespiration data was obtained for squid at different ages and temperatures. Average values are:\nAge\nTemperature\nm102/mg dry wt./hour\nNewly hatched squid\n10℃\n1.5\nNewly hatched squid\n15°C\n2.5\nNewly hatched squid\n20°C\n3.5\n21 day old squid\n15℃\n3.5\n58 day old squid\n15°C\n3.7\nRespiration and growth data and intended to be used to evaluate the overall feeding potential of squid and their position impact as predators on fish larvae.\n17\nCalCOFI Plankton Collection to be Analyzed in Study of Invertebrate Predators of Larval Anchovy\nA meeting was held at the La Jolla Laboratory this month to consider experimental design for the study of invertebrate predators of larval anchovy by analysis of CalCOFI plankton collections. Attending the meeting were Drs. Ahlstrom, Alvariño, Hunter, Stauffer and Mr. Zweifel. The principal conclusions of the meeting were: 1) to establish species codes for invertebrate predators, establish a data format and begin processing existing data on distribution and abundance of predators; 2) develop a sampling design which uses larval and egg density to select samples for analysis; 3) consider initially for analysis cruises occurring between January through July for the years 1954, 1956, and 1958. Mr. Zweifel agreed to develop the experimental design once the existing data is on cards.\nIn response to these suggestions, Dr. Alvariño this month prepared a species code for species of Chaetognatha, Chondrophorae, Siphonophorae, Medusae and Ctenophora. The codes include all species in each of these groups that occur in the upper 100 m in the California Current area and their life stages. A data format has been developed which will include data from analysis of gut contents of larval predators as well as the abundance and life stage of each predator. Dr. Alvariño has begun to transcribe the existing data into this form for automatic data processing.\nDr. Alvariño has also prepared a manuscript entitled, \"Bathymetric distribution of Pleuroncodes planipes (Crusteacean, Galatheidae). A new fisheries off California.\" The information in this manuscript is based on 1969 stratified plankton collections taken off California.\nFourth Fish Egg and Larval Identification in Course Completed\nBetween April 1 to 18, an intensive course dealing with identification of fish eggs and larvae was given at the Southwest Fisheries Center under the direction of Dr. E. H. Ahlstrom, Senior Scientist, but also involving most persons working on larval fishes at the La Jolla Laboratory. This was the largest group who have taken the larval fish identification course - 21 persons, 13 from foreign countries. This is the fourth time that Dr. Ahlstrom has presented this course. Although the participants had mixed backgrounds and experience in ichthyology and ichthyoplankton they all shared one characteristic, according to Dr. Ahlstrom - they came to learn and all participants worked diligently.\n18\nDuring the course a total of 204 life history series was studied, belong- ing to 92 fish families. About 10% of the series are based on Atlantic material, 90% on Pacific. However, of the 92 families studied 87 occurred in both the Atlantic and Pacific, hence there is considerable transference of background as between oceans.\nThe contribution on carangid larvae, presented by Dr. Ahlstrom and Ms. Barbara Sumida at the Ensenada Symposium, has been reworked, edited, and is now in final form for publishing.\nThe contribution titled, \"Report on neuston (surface) collections made on an extended CalCOFI cruise during May 1972\", by Dr. Ahlstrom and Ms. Elizabeth Stevens, is being revised before submission as a contribution to the CalCOFI Report series.\nDr. G. Moser, Fishery Biologist, gave the lecture in the ichthyoplankton course dealing with scorpaenids and assisted in the laboratory work. He is editing his handbook dealing with life history series of scorpaenid fishes.\nExperiments on Maturation and Spawning of Striped Bass Approaching Completion\nDr. Reuben Lasker and Mr. K. Lal of the California Department of Fish and Game report that during April, four hormone-injected female striped bass held in sea water attained ripe condition and were spawned. Eggs and milt from a ripe male were stripped into fresh water, but very few larvae hatched from this fertilization.\nTwo females developed eggs as large as 0.6 and 0.7 mm diameter in February 1975 after being kept under constant spring-like conditions since August 1974. To enhance ripening, these fish were injected with salmon pituitary. In March, both fish had eggs of 0.8 mm diameter and were injected with human chorionic gonadotropin (HCG). Biopsy after 2 weeks showed the presence of green ova (typical of the ripe condition) up to 1.2 mm diameter and the fish were reinjected with HCG for spawning. Unlike the previous cases, these two females spawned after a series of three injections over a 6 week period.\n19\nThe remaining two females were exposed to a winter-spring cycle from January 1, 1975 and were spawned after 108 days, requiring only two HCG injections. This showed that striped bass females can complete development from immature oocytes (0.3 mm or less) to ripe eggs (1.1 mm or less) in less than 4 months.\nFurther efforts are being made to determine whether salmon pituitary will give more consistent results than HCG for maturation of gonads.\nDrs. Reuben Lasker and Paul Smith of the La Jolla Laboratory met April 29-30 with Mr. Ron Keir of FAO, Mexico City and Mr. David Lluch of In- stitute Nacional Pesquero, Mexico City to discuss collaboration in future California Cooperative Oceanic Fisheries Investigations (CalCOFI) surveys. A meeting of CalCOFI scientists will take place on June 26 in Mexico City to elaborate on cooperative studies of mutual fishery resources of the U. S. and Mexico.\nSampling Properties of MARMAP Bongo Nets and CalCOFI Standard Net to be Evaluated\nDr. Reuben Lasker reports that preparations were made in April to evaluate the sampling properties of the new MARMAP Bongo nets and the CalCOFI stand- ard net. A committee convened by Dr. Lasker and consisting of Drs. Ed Brinton, Abe Fleminger, and John McGowan of the Scripps Institution of Oceanography and Dr. Paul Smith met in April to consider the preliminary results from a 90 sample suite of observations taken with the two nets. On the average, the smaller bongo sampler collected 50% more zooplankton than the CalCOFI net with which it was compared. A 20 sample series was selected to begin to interpret the species composition of the additional biomass collected by the improved sampler. These data are presented in Administra- tive Report no. LJ-75-57, \"Comparison of the collecting properties of the MARMAP open bongo and the CalCOFI standard net with similar mesh design on three stations, Winter 1975, in the California Current - A preliminary report.\"\nWith the sized-larva data file nearing completion, an ad hoc committee of Dr. Paul Smith, Mr. Larry Eber and Dr. Robert Owen of the La Jolla Laboratory met to assemble preliminary specifications for the oceanographic data file with which larval development and mortality rates maybe prepared. To accommodate a wider range of users, this committee presented the results of their deliverations to scientists of the coastal division and to the personnel of the SWFC computer service. The basic data file is now being\n20\ncreated and suggested outputs are being evaluated. The primary outputs will be time series of sized larvae region and by a group of eight sec- tions, five normal to, and three parallel to the coast. Inquiries by those interested may be directed to Roger Hewitt, Larry Eber, Bob Owen or Paul Smith.\nDr. Smith consulted with Dr. Frank Augustine of the Energy and Resources Division of the Aerospace Corporation on April 28 to assist in unifying the ichthyoplankton sampling criteria of the NMFS sampling program (Bongo nets) and the sampling criteria of the Department of the Interior, Bureau of Land Management, Marine Minerals Division for the Outer Continental Shelf environmental studies program. This program is involved in com- piling baseline data and designing a monitoring system for critical en- vironmental parameters to ensure that oil and gas exploration and develop- ment on the Outer Continental Shelf do not cause quality deterioration of the environment.\n* *\nDr. Paul Smith, Fishery Biologist and Ms. Sharon Duke, Statistical Assistant, at the La Jolla Laboratory, submitted a report on the inshore- offshore distribution of anchovy eggs and larvae to the University-State- Federal Anchovy Working Group. Administrative Report no. LJ-75-58, \"Nearshore distribution of northern anchovy eggs and larvae (Engraulis mordax)\" summarizes the incidence of eggs and larvae in 5 mile bands near the coast and offshore islands, in 10 mile bands in the offshore area and the seaward incidence of eggs and larvae. The report was prepared from data collected on the Pt. Arguello area environmental impact analysis prepared for the Atomic Energy Commission by Senior Scientist Elbert Ahlstrom in July 1965.\nScientists from NMFS, California Department of Fish and Game and the Scripps Institution of Oceanography participating in the Anchovy Workshop are assembling and comparing all assessment methods now available for use in the management of the anchovy fisheries.\nPreparation of Long-Term Monthly Mean Sea Surface Temperature Charts in Process for the Pacific Ocean\nMessrs. L. Eber, Meteorologist, F. Miller, Meteorologist with the Inter- American Tropical Tuna Commission, and J. Renner, Fishery Biologist have entered into a joint effort to prepare for publication, charts of monthly mean sea surface temperature and of seasonal (month to month) changes in the North and Eastern tropical Pacific Ocean. The charts will be based on data for the 20 year period 1948-67, obtained from the Fleet Numerical Weather Central and summarized by 1º quadrangles with assistance of the Pacific Environmental Group, NMFS, Monterey. Preliminary processing of the\n21\ndata was completed in April 1975 and resulted in the production of digital plots and printouts, and smoother contour plots computed from harmonic coefficients fitted to the data to achieve seasonal continuity. This procedure is particularly useful for regions of sparse data dis- tribution. The computer outputs will be used as aids in making the final charts.\nPlan Submitted to IOC for Future Oceanic Surveys off Peru to Analyze Impact of \"El Nifio\"\nDr. Paul Smith, Fishery Biologist at the La Jolla Laboratory, submitted a plan in April to the Intergovernmental Oceanographic Commission of UNESCO regarding the future conduct of oceanic surveys off Peru to analyze the impact, if any, of the \"EL Nino\" phenomenon on the growth and survival of anchoveta larvae and juveniles. This plan was originally designed in Guayaquil, Ecuador in December by a committee of Oscar Guillen of Peru, David Cushing of Great Britain, and Dr. Smith. Its implementation is intended to allow the analysis of the anchoveta popu- lation, particularly larval and juvenile survival and subsequent recruitment in the context of the fishery, primary and secondary production, and pre- dation as it is affected by the severe climatic changes associated with the \"El Niño\" phenomenon.\nAnchovy Workshop Proceedings Completed\nDr. Gary Stauffer, Fishery Biologist at the La Jolla Laboratory and Mr. Alec MacCall, Associate Marine Biologist, California Department of Fish and Game, edited the proceedings of the March 19-20 CalCOFI Anchovy Workshop, compiled by Ms. L. Vlymen. The proceedings outline much of what is known about the northern anchovy and point out areas where knowledge is inadequate.\nA large portion of the Anchovy Workshop was devoted to discussions of various survey techniques for measuring abundance (absulute or relative). All agenda items outlined in the March monthly report of the SWFC are reviewed, except recommendations for research. This item was deferred for a second meeting scheduled for May 5 and 6 at the Southwest Fisheries Center. The purpose of the second Anchovy Workshop is to develop guidelines for research in the anchovy program and to order priorities to accomplish the objectives. Center Director Brian J. Rothschild will chair the proceedings.\n22\nTUNA ASSESSMENT AND DEVELOPMENT INVESTIGATIONS\nRecommendations Made on Future Direction of Honolulu Laboratory Baitfish Project\nThe work and future direction of the baitfish project were discussed in two meetings of the ad hoc Baitfish Committee and in program review sessions held at the Honolulu Laboratory by the Center Director this month. Three recommendations emerged from these discussions: 1) Continue work with roll-on/roll-off transportation of baitfish but move operations to Tiburon Laboratory. Next trial shipment will be preceded by 3 months of experiments to determine causes of mortality during aging and shipment. 2) Transport, via chartered bait boat, 1,500 to 3,000 buckets of northern anchovy from California for use in fishing tests in Hawaii. 3) Supply threadfin shad from Wahiawa Reservoir for fishing tests during the 1975 skipjack tuna season. A proposal was prepared for PTDF participation in the foregoing. Plans were made to move Roger Green, Leader, Bait Fishery Development Program to Tiburon to start work on 1) above.\nContinuing in the assessment of other tuna and tunalike resources as part of the Honolulu Laboratory's Tuna Monitoring and Assessment Task, Fishery Biologist Richard N. Uchida worked on a paper, \"A summary of environmental and tuna fishing information of the U.S. Trust Territory of the Pacific Islands.\" He also reviewed and worked on revisions of the paper \"The Pacific tuna pole-and-line live-bait fisheries\" which he is authoring jointly with Messrs. Howard Yoshida and Tamio Otsu. Mr. Uchida and Ms. Lucille Tsukano collaborated in updating the 1974 Hawaii Division of Fish and Game's skipjack catch reports and flagline catch reports. Ms. Tsukano rechecked and corrected all the skipjack bait reports. The decks of skipjack bait catches, skipjack catches, flagline bait catches, and flagline catches for 1974 are now complete and may be used in data processing.\nFishery Biologist Tom Hida assembled information dealing with albacore catches in the area of Midway for west coast albacore trolling boats that are heading there. Mr. Hida also worked on manuscript review and revision of the manuscript \"Baitfish study in Majuro, Marshall Islands\" by Hida and Uchiyama.\n23\n*\nFishery Biologist Jerry Wetherall has gone to the La Jolla Laboratory where he will spend about 2 months working on North Pacific albacore data.\nApril a Below-Average Month in Hawaii's Skipjack Tuna Fishery\nAn estimated 116.8 MT (metric tons) of skipjack tuna were landed in April in the Hawaiian fishery. This catch was 40.2 MT below the catch in April 1974 and 106 MT lower than the long-term April average (1948-74). The catch from January through April was estimated at 624.8 MT, 18 MT below last year's catch for the same period and 51.1 MT above the average for 1948-74.\nGAS employee Pulou Niuatoa recorded the lengths of 565 albacore from 12 vessels unloading at Pago Pago during the period March 22 to April 25. He collected 42 sets of catch and effort data. Data from five vessels were used to determine an average size of 92.1 cm and an albacore catch per 100 hooks of 0.91.\nPUBLIC RELATIONS - SOUTHWEST FISHERIES CENTER\nApril 10 20 participants in the 1975 San Diego Science Fair visited the Center for a lecture and tour of the facilities. Mr. David Kramer, Fishery Biologist, was the speaker and host for the group and their adult sponsors.\n16 Dr. Brian J. Rothschild, Director, Southwest Fisheries Center, presented a lecture at the UC Irvine Campus entitled, \"Development of Fisheries Policy\". This lecture was a part of a University Extension course, \"The living marine resources of California: The management imperative\", given during the spring quarter.\n30 Dr. Paul Smith, Fishery Biologist, La Jolla Laboratory, lectured to 75 members of a biological oceanography class at San Diego Mesa College on \"Fisheries in the California Current\".\n24\nApril 30\nThe Honolulu Laboratory contributed an interest- ing display and movie to the Federal Day presen- tation on April 30. This was held in the Coral Ballroom of the Hilton Hawaiian Village Hotel in conjunction with the annual luncheon honoring nominees for the outstanding federal employee awards.\nSEMINARS\nHonolulu Laboratory\nApril 9 Dr. Paul Struhsaker, Fishery Research Biologist, gave a seminar on fishes and crustacean resources of the tropical upper slope zone at the Honolulu Laboratory.\n23 Dr. Brian J. Rothschild, SWFC Director, spoke on extended jurisdiction to Honolulu Laboratory staff members and guests.\nLa Jolla Laboratory\nApril 3\nProfessor Joseph Reid, Director, Marine Life Research Group, Scripps Institution of Oceanography presented a lecture entitled, \"Geostrophic flow at various deep pressure surfaces in the Pacific Ocean\".\nMEETINGS AND TRAVEL (Unless otherwise mentioned in text)\nMarch 21 - April 11 Dr. Ed Scura, Physiologist, La Jolla Laboratory, traveled to Woods Hole, Massachusetts to join the research vessel Atlantic II for a cruise, sponsored by the Brookhaven National Laboratory, off Long Island. Dr. Scura's participation in the cruise was in connection with the NMFS-Brookhaven contract on the investigation of the causes of larval fish mortality in the New York Bight and the Los Angeles Bight. During the cruise Dr. Scura used the plankton pump and towed a plankton net to collect fish larvae and to assess the kinds and densities of larval food particles.\n25\nMarch 31- April 9\nCenter Director Brian J. Rothschild traveled to Washington, D. C., Kingston, Rhode Island and Woods Hole, Massachusetts to meet with Dr. William Royce regarding extended jurisdiction and to present seminars at the University of Rhode Island and the Northeast Fisheries Center.\nApril 2-4\nDr. Jeannette Struhsaker, Pete Benville, and Tina Echeverria traveled to Bend, Oregon to attend the Pacific Fisheries Biologist 1975 Annual Meeting.\n4-6 Dr. Tim Smith, Fishery Biologist, La Jolla Laboratory, attended the Maximum Sustainable Yield meeting sponsored by the World Wildlife Fund in Airlie, Virginia. His travel was paid by the Fund.\n8 The ad hoc Baitfish Committee met to discuss the results of the most recent baitfish transport trial and to address the question, \"Where do we go from here?\"\n10 Mr. Chaco Yamamoto, commercial fisherman from Hilo, discussed the phenomenon of burnt tuna with Messrs. Shomura and Yuen at the Honolulu Laboratory.\n11-13\nLibrarian Hazel S. Nishimura attended the annual spring conference of the Hawaii Library Association held at the Princess Kaiulani Hotel. Ms. Nishimura was elected secretary of the Special and Reference Section of HLA.\n13-15\nMr. David Mackett, SWFC, traveled to Washington, D.C. to attend a meeting regarding the Bureau of Land Management proposal. He subsequently flew to San Francisco to attend a meeting on the National Fisheries Plan where the principal topics of discussion were ex- tended jurisdiciton and the NFP Issues and Plans.\n14 Susumu Kato met with Don Whitaker, Coordinator of Development of Underutilized Fisheries Resources at the Southwest Region, Terminal Island, California.\n15 Mr. Shomura met with members of the research staff and Mr. Lee to discuss operational policies and guidelines.\n26\n18 Susumu Kato attended a meeting on the Commercial Fishing Hearing of the Senate Select Committee on Maritime Industry, presided over by State Senator Milton Marks in San Francisco, California.\n21 Dr. Brian J. Rothschild, SWFC Director, spent the week of April 21 at the Honolulu Laboratory. The primary purpose of his visit was to review and discuss present research projects. Dr. Rothschild met with Mr. Shomura on Monday, April 21. On Tuesday he attended staff meeting at 0800, spoke at a general staff meeting at 0900, met with Mr. Lee before lunch, met with the Fish-Environment group all afternoon. On Wednesday he met with the Assessment and Development group from 0900 to 1030, presented a seminar on ex- tended jurisdiction until noon, met with the Population Dynamics group all afternoon. On Thursday he attended a meeting of the ad hoc Baitfish Committee at 1000 and met all afternoon with Mr. Shomura and Investigation Chiefs Dr. Richard Barkley and Tamio Otsu. He spent Friday morning with Mr. Shomura and departed for San Diego Friday at noon.\n25\nJeannette Struhsaker and Physiology Staff visited the Department of Fish and Game's Elk Grove Hatchery. The main purpose of the hatchery is to provide striped bass for stocking reservoirs.\n26\nMessrs. Wilvan Van Campen and Frank Alverson (Living Marine Resources) met with Messrs. Shomura and Iversen to discuss PIDC/PTDF matters. Messrs. Van Campen and Alverson were en route to Micronesia to meet with Trust Territory representatives regarding PTDF/PIDC.\n29\nMs. Hazel Nishimura attended a luncheon meeting at Gateway House sponsored by the Pacific Islands Studies Program of the University of Hawaii for the purpose of bringing together UH-related units with different organizational objectives but a common interest in the use of published materials relating to Hawaii and the other Pacific Islands.\n27\nApril 30\nMessrs. Robert Schoning, Director, NMFS, accompan- ied by Mr. Herb Blatt, Staff Attorney for NMFS, and Mr. Ray Hubley, Chief, Marine Mammal and Endangered Species Division, and Mr. Gerald Howard, Director, NMFS, Southwest Region and Drs. Rothschild and Fox and Mr. Robert Scott from the Southwest Fisheries Center met with members of the tuna industry to discuss the porpoise/tuna problem.\nVISITORS\nHonolulu Laboratory\nApril 7-8 Dr. Veravat Hongskul, Marine Fisheries Laboratory, Thailand.\n9 Mr. Rudy Kunihisa, Bumble Bee Seafoods, Castle & Cooke, Honolulu\n10\nMr. Henry K. Lindsey, Eden Corp., Laie, Hawaii\n14 Mr. Keith Brouillard, American Embasy, Toyko\n15 Mr. Robert S. LeGoff, Pryor Corp., Oahu Oyster Farms, Kaneohe\n23 Mr. Clinton E. Atkinson, Consultant, Seattle\nLa Jolla Laboratory\nApril 8\nMr. Howard L. Fraley, NASO, NOAA, Seattle, Washington\n15-17 Dr. William Royce, Director, Extended Jurisdiction Planning Office, NOAA visited the SWFC and presented a talk on extended jurisdiction at a general staff meeting.\n28 Dr. Frank Augustine, Aerospace Corp., El Segundo, California\n28\nTiburon Laboratory\nApril 8 Keith Brouillard, Fishery Attache with the State Department, Tokyo, Japan\nBud Schulz, Del Monte Corporation, San Francisco, California\nWilliam Kyono, Bumble Bee Sea Foods, San Francisco, California\n1\n9\nAl Rowe, S.I.O., La Jolla, California\n18\nRoger Edwards, Underwater Biological Research\n28 Robert Byington, Santa Cruz Department of Education, Santa Cruz, California\n29 George Snyder, Northwest Fisheries Center, Seattle, Washington\nDave Misitano, Northwest Fisheries Center, Seattle, Washington\nPERSONNEL\nLaboratory\nApril 4 Dale Radabaugh, Biological Aid, (T) Resignation\nLa Jolla\n11 Allyn Bates, Biological Aid, (T) Resignation La Jolla\n18 William Price, Biological Technician, (T) Expiration of Appointment La Jolla\n21 Stephen Ahern, Biological Technician, (T) Temporary Appointment La Jolla\nMaxine Savage, Laborer, Temporary Assignment\nLa Jolla\nHelen Caouette, Clerk-Typist (T) Appointment La Jolla\nLawrence Means, Biological Aid (T) Appointment La Jolla\n29\nLaboratory\nApril 27\nHarold Dorr, Biological Aid (T) Conversion to student appointment La Jolla\n28 Elaine Carlin, Biological Aid (T) Student appointment La Jolla\n.\nMary Beth Murphy, Clerk-Steno Appointment La Jolla\nDavid Au, Operations Research Analyst, Appointment La Jolla\nTRAINING\nApril 15-17 Dr. Jeannette Struhsaker, Systems Analysis for Government Operations\nSusumu Kato; Systems Analysis for Governmental Operations ar\nHONORS AND AWARDS\nThe NMFS Scientific Publications Staff in Seattle, Washington has been in- formed that their entry, U.S. Fishery Bulletin has won the Award of Merit in the Technical Journal Category of the Society for Technical Communication's Sixth International Publications Competition. The award will be presented at the International Technical Communications Conference in Anaheim, California May 15 and will be accepted by Mr. Kiyoshi Fukano, Acting Chief, Scientific Publications Staff.\nThis award is of particular interest and gratification to the Southwest Fisheries Center since Dr. Reuben Lasker of the La Jolla Laboratory served as Scientific Editor of the Fishery Bulletin for 4 years, ending June 30, 1974. During this period, Dr. Lasker strongly influenced the scientific image pro- jected by the Bulletin. In the first year of Dr. Lasker's editorship, the Fishery Bulletin became a quarterly, and in the years 1971-73, the average number of pages printed per year almost tripled, reaching 1,119. Dr. Lasker was able to attract to the pages of the Fishery Bulletin not only outstanding contributions to fisheries science from members of the NMFS staff but also major fisheries papers from scientists outside NMFS.\n30\nThe success of the Bulletin is reflected by its circulation. First put on sale in January 1972, the Bulletin within less than a year was selling more than 1,000 copies and the list is growing despite increased sub- scription costs. With the free circulation, which has been held to a minimum, added to the paid, the Fishery Bulletin now reaches almost as many readers as the Journal of the Fisheries Research Board of Canada and the Transactions of the American Fisheries Society, both outstanding publications in the field.\nLt. Roger P. Hewitt, NOAA Corps, who has been assigned to the NMFS Southwest Fisheries Center since June 1973, has been informed that he has been selected for assignment in the Fall of 1975 to full-time graduate training in the Applied Ocean Sciences Department, Scripps Institution of Oceanography, University of California, San Diego, pending approval of the Associate Administrator of NOAA.\nMarch 16 Howard 0. Yoshida, Fishery Biologist, Quality Increase - Honolulu Laboratory\n30 Shoji Teramoto, Supply Clerk, Quality Increase Honolulu Laboratory\nApril Thomas K. Kazama, Biological Technician, Outstanding Performance Rating - Honolulu Laboratory\n29 Henry Orr, Office Draftsman, Cash Award - La Jolla Laboratory\n31",
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                    "content": "Standard",
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                    "content": "Reactivated NOAA Research Vessel Cromwell",
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                    "content": "10",
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                    "content": "Research on Effects of Aromatic Hydrocarbons on",
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                    "content": "LA JOLLA, CALIFORNIA",
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                    "content": "HONOLULU LABORATORY",
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                },
                {
                    "content": "LA JOLLA LABORATORY",
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                    "content": "TIBURON LABORATORY",
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                    "content": "MONTHLY REPORT - APRIL 1975",
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                    "content": "STATUS OF PUBLICATIONS",
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                    "content": "Clark, N. E., L. Eber, R. M. Laurs, J. A. Renner, and J. F. T. Saur.",
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                    "content": "1974. Heat exchange between ocean and atmosphere in the eastern",
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                    "content": "North Pacific for 1961-71. NOAA Tech. Rep. NMFS SSRF-682,108 p.",
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                    "content": "Summaries of large-scale heat exchange between ocean and atmos-",
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                {
                    "content": "phere in the eastern North Pacific Ocean are presented for the",
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                    "content": "1) monthly values of total heat exchange and departures from a",
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                    "content": "depending upon the intended use of the charts.",
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                    "content": "and those given in two other reports. Discrepancies between values",
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                    "content": "attributed to differences in the empirical equations used to make",
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                    "content": "the heat exchange computations, differences in data processing",
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                    "content": "techniques, differences in the observed data used in the computa-",
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                    "content": "tions due to difference methods of acquisition, and the possibility",
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                    "content": "of ocean climate changes.",
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                    "content": "South",
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                    "content": "America",
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                {
                    "content": "examined.",
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                {
                    "content": "Hobson, Edmund S. 1975. First California record of the serranid fish",
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                    ]
                },
                {
                    "content": "Anthias gordensis Wade.",
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                    ]
                },
                {
                    "content": "Calif. Fish Game, 61(2): 111-112.",
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                    ]
                },
                {
                    "content": "This paper reports the first record of this sea bass species to",
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                },
                {
                    "content": "be collected in California (and U. S. ) waters.",
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                },
                {
                    "content": "Green, Roger E. 1975. A preliminary list of fishes collected from",
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                },
                {
                    "content": "Richardson Bay, California. Calif. Fish Game, 61(2): 104-106.",
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                    "content": "This paper gives a preliminary list of fishes collected in",
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                    "content": "Richardson Bay (part of the San Francisco Bay system) from",
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                },
                {
                    "content": "June 1972 to July 1973. Sampling methods are described for the",
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                },
                {
                    "content": "difference life stages collected: eggs and larvae, juveniles and",
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                },
                {
                    "content": "adult fishes. Two species on the list have not been reported",
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                },
                {
                    "content": "previously from San Francisco Bay: roughtail skate (Raja trachura)",
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                },
                {
                    "content": "and white seabass (Cynoscion nobilis).",
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                },
                {
                    "content": "Miller, Forrest R. and R. Michael Laurs. 1975.",
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                },
                {
                    "content": "The El Nino of 1972-",
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                },
                {
                    "content": "1973 in the eastern tropical Pacific Ocean.",
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                {
                    "content": "Inter-Am. Trop. Tuna",
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                },
                {
                    "content": "Comm. Bull., 16(5): 403-448.",
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                    "content": "Beginning in February 1972 the usual seasonal cooling of the",
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                },
                {
                    "content": "surface water of the eastern Pacific Ocean in the region of the",
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                },
                {
                    "content": "Peru Current and along the equator failed to develop. By July",
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                },
                {
                    "content": "tropical coastal and equatorial island stations and ships crossing",
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                    ]
                },
                {
                    "content": "the equator were recording sea-surface temperatures which were 6°",
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                    ]
                },
                {
                    "content": "to 8ºF (3.3º-4.4℃) above the long-term mean. The anomalies spread",
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                },
                {
                    "content": "over most of the eastern tropical Pacific and westward into the",
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                    "spans": [
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                            "offset": 4155,
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                },
                {
                    "content": "central equatorial Pacific through September. During October,",
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                },
                {
                    "content": "surface temperatures at coastal stations along South America were",
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                },
                {
                    "content": "returning to normal, but in November and December 1972 temperatures",
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                    ]
                },
                {
                    "content": "rose rapidly again, with a near-record temperature anomaly of 81ºF",
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                    "content": "(4.2℃) above the long-term mean recorded at Puerto Chicama, Peru",
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                    "content": "(7º42'S,79º27'W). After January 1973 sea surface temperatures",
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                    "content": "began returning rapidly to normal over most of the eastern tropical",
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                    "content": "Pacific, and by March 1973 the El Nino had completed its cycle.",
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                    "content": "Monthly sea-surface temperature anomalies over the eastern tropical",
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                    "content": "Pacific are discussed to show the extent and magnitude of warming.",
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                    "content": "Annual temperature profiles at several South American coastal and",
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                    "content": "equatorial island stations are compared with temperature profiles",
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                    "content": "for the 1957-1958 and 1965 El Nino year. Characteristics of the",
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                    "content": "temperature anomaly profiles at Puerto Chicama during several very",
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                    "content": "warm years for the 1925-1972 period are also compared. Finally,",
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                    "content": "meteorological factors contributing to a relaxation of the south-",
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                    "content": "east trade winds and to the decreased upwelling along the coast",
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                    "content": "of South America in 1972-1973 are examined.",
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                    "content": "Game.",
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                    "content": "3",
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                {
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                {
                    "content": "August 9-12, 1972, Part 1. Report of the Symposium. U. S. Dep.",
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                {
                    "content": "Commer., Natl. Mar. Fish. Serv., Spec. Sci. Rep. Fish. 675, 33p.",
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                {
                    "content": "Skillman, Robert A.",
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                {
                    "content": "Thunnus alalunga, fishery, 1953-72. U. S. Natl. Mar. Fish Serv.,",
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                    ]
                },
                {
                    "content": "Mar. Fish Rev. 37(3): 9-17. (MFR Paper 1127).",
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                    "content": "From the mid-1960's through the early 1970's, markedly increased",
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                {
                    "content": "effort expended in the South Pacific albacore, Thunnus alalunga",
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                    "content": "proposed. These factors have prompted an assessment of the fishery.",
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                    "content": "a 25% increase in fishing effort over the 1971 level will result in",
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                    "content": "either a small increase in catch or a substantial decline, depending",
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                {
                    "content": "on the measure of fishing effort used.",
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                },
                {
                    "content": "Translation",
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                },
                {
                    "content": "Suisan Shuho. 1975. The life blood of the skipjack tuna pole-and-line",
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                    ]
                },
                {
                    "content": "fishery - The problem of baitfish (anchovy) mortality (Katsuo ippon",
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                            "offset": 6472,
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                    ]
                },
                {
                    "content": "zuri no seimeisen - Katakuchi tairyo-shi no wadai wo otte).",
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                {
                    "content": "Suisan",
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                },
                {
                    "content": "Shuho (The Fishing and Food Industry Weekly) 731: 16-17. January 25,",
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                {
                    "content": "1975. (Translated from Japanese by Tamio Otsu, 1975, 4 p., Transla-",
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                },
                {
                    "content": "tion No. 11) [Limited distribution.]",
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                },
                {
                    "content": "Approved by Center Director",
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                            "offset": 6781,
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                },
                {
                    "content": "\"DDT and its metabolites in the sediments off Southern California\" by",
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                },
                {
                    "content": "John S. MacGregor. For publication in the Fishery Bulletin, U.S.",
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                },
                {
                    "content": "\"Behavior and survival of northern anchovy Engraulis mordax larvae\"",
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                },
                {
                    "content": "by John R. Hunter. For publication in the Symposium in Fisheries",
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                {
                    "content": "Biology, Ensenada, B. C., Mexico.",
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                {
                    "content": "\"Early life history studies of eastern Pacific carangids\" by Elbert H.",
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                {
                    "content": "Ahlstrom and Barbara Y. Sumida. For publication in the Symposium in",
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                {
                    "content": "Fishery Biology, Ensenada, B. C., Mexico.",
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                    "content": "\"Acclimation and rearing of striped bass larvae in sea water\" by Krishan",
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                {
                    "content": "Lal, Reuben Lasker and Andrew Kuljis. For publication in California",
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                    "confidence": 0.995,
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                },
                {
                    "content": "km",
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                {
                    "content": "intervals.",
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                {
                    "content": "4",
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            "lines": [
                {
                    "content": "ALBACORE FISHERIES INVESTIGATIONS",
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                    ]
                },
                {
                    "content": ". .",
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                },
                {
                    "content": "Albacore Oceanography Cruise Slated on Newly Reactivated NOAA",
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                },
                {
                    "content": "Research Vessel Cromwell",
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                },
                {
                    "content": "Preparations are underway for a 17 day albacore oceanography cruise",
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                },
                {
                    "content": "aboard the NOAA research vessel, Townsend Cromwell, June 16 to July 10.",
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                },
                {
                    "content": "Messrs. R. Lynn, Cruise Leader, accompanied by K. Bliss, T. Mulitauaopele,",
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                },
                {
                    "content": "and R. Dotson of the Albacore-Oceanography project at the La Jolla Labor-",
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                },
                {
                    "content": "atory will participate. This cruise will take advantage of the transfer",
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                },
                {
                    "content": "of the Cromwell to Kewalo Basin, Honolulu after its recent reactivation",
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                },
                {
                    "content": "in Seattle, Washington.",
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                },
                {
                    "content": "The Seattle-Honolulu track needs only a small modification to permit a",
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                },
                {
                    "content": "repeat of the central transect (40° to 30°N along 137°30'W) of the",
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                },
                {
                    "content": "offshore albacore surveys conducted in the three preceeding years (1972-",
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                },
                {
                    "content": "74) at this same time of year. According to Oceanographer Lynn, the",
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                {
                    "content": "objectives of this cruise are 1) to collect oceanographic data to further",
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                },
                {
                    "content": "evaluate the relationships between oceanographic features and the early",
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                },
                {
                    "content": "seasonal distribution and apparent abundance of albacore tuna in offshore",
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                },
                {
                    "content": "waters, as indicated by American Fishermen's Research Foundation charter",
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                },
                {
                    "content": "vessels and independent fishing vessels catches; 2) to measure the lo-",
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                },
                {
                    "content": "cation and strength of the subtropic and subarctic fronts associated with",
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                {
                    "content": "the boundaries of the Transition Water between the Pacific Subarctic and",
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                    "content": "North Pacific Central Water masses; 3) to gather data across the",
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                },
                {
                    "content": "California Current to make estimates of momentum and transport. In addi-",
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                {
                    "content": "tion, a limited effort will be made to transport several live albacore",
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                    "content": "to Kewalo Basin for physiological experiments.",
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                    "content": "Mr. Lynn is preparing detailed cruise plans. Salinity-temperature-depth",
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                {
                    "content": "(STD) casts to 1,000 meters will be conducted along the entire track from",
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                    "content": "Seattle to Honolulu if time permits.",
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                {
                    "content": "Mr. Lynn plans to concentrate major effort along the 137º30'W transect;",
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                {
                    "content": "trolling will be conducted along this entire transect (Cromwell will lay-to",
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                {
                    "content": "during the hours of darkness), STD stations will be spaced at 46 km intervals",
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                    "content": "and neuston tows will be conducted at every other station.",
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                    "content": "Daily radio",
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                    "content": "communications will be maintained with four fishing vessels on charter",
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                    "content": "to the American Fishermen's Research Foundation and with independent fishing",
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                    "content": "vessels to exchange fishing, oceanographic, and weather information as",
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                    "content": "needed.",
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                    "content": "Radio communications will be conducted with Western Fishboat",
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                    "content": "Owner's station WHG for coordination with the charter operation control.",
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                    "content": "Outside of the 137º30'W transect stations will be spaced at 74 km intervals.",
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                },
                {
                    "content": "the Cromwell.",
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                    "content": "NMFS-AFRF Continue Cooperative Albacore Research Studies",
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                    "content": "Dr. R. M. Laurs, Oceanographer in charge of the Albacore Fisheries program,",
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                    "content": "reports that during the 1975 albacore season, the American Fishermen's",
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                    "content": "Research Foundation (AFRF) will charter seven fishing vessels in the cooper-",
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                    "content": "ative NMFS/AFRF exploratory fishing and research program. Four of the",
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                    "content": "vessels are slated to leave San Diego on or about June 1 to work in the",
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                    "content": "early-season offshore fishery. Two of these four vessels will carry NMFS",
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                    "content": "observers. In addition to the exploratory fishing these vessels will tag",
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                    "content": "all albacore in prime condition for a study of migration patterns, keep",
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                    "content": "detailed logs on fish catches, fish measurements, and sea conditions and",
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                    "content": "make two expendable bathythermograph casts per day. Daily radio reports",
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                    "content": "will be made to the AFRF radio station, WHG, or WWD, the Commerce-licensed",
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                    "content": "radio station at the Scripps Institution of Oceanography. Radio communi-",
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                    "content": "cations will also be maintained with the NOAA research vessel Townsend",
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                    "content": "Cromwell for exchange of information.",
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                    "content": "In addition to the offshore studies, three charter fishing vessels will",
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                    "content": "conduct albacore scouting and research activities in nearshore waters",
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                    "content": "during the 1975 albacore fishing season. The purposes of the study are",
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                    "content": "to conduct tagging operations for the study of albacore movements; and",
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                    "content": "to make oceanographic observations for evaluation of the influence of",
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                    "content": "the physical marine environment upon the relative abundance of albacore.",
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                    "content": "Two of three vessels will carry NMFS observers.",
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                    "content": "COASTAL FISH COMMUNITIES INVESTIGATIONS",
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                    "content": "At the Tiburon Marine Laboratory, Dr. Edmund Hobson, Project Leader, and",
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                    "content": "Fishery Biologist Tony Chess of the nearshore fish communities project,",
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                    "content": ")",
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                    "content": "with low brown algae, 3) rocks overgrown with low red algae ( in surge zone) ,",
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                    "content": "4) rocks overgrown with coralline algae, 5) sand overgrown with low brown",
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                    "content": "algae (anchored on worm tubes), and 6) open sand. Assessments are based",
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                    ]
                },
                {
                    "content": "on visual counts along established transect lines and samples made with",
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                },
                {
                    "content": "dredge, air-lift, nets and spears.",
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                },
                {
                    "content": "Resident fishes, with emphasis on recreational species, are among the",
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                },
                {
                    "content": "organisms sampled in each habitat. Study of the gut contents of these",
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                },
                {
                    "content": "fishes demonstrates which of the organisms present in each habitat are",
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                {
                    "content": "in fact consumed by the fishes.",
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                {
                    "content": "COASTAL FISHERIES INVESTIGATIONS",
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                {
                    "content": "Demand Grows for Pelagic Red Crab to Color Flesh of Pen-reared",
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                {
                    "content": "Salmon",
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                {
                    "content": "The pelagic red crab (Pleuroncodes planipes) has proved to be a valuable",
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                },
                {
                    "content": "feed supplement for cultured salmon. Pen-rearing of salmon is growing",
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                },
                {
                    "content": "rapidly as a commercial aquaculture venture in the Pacific Northwest.",
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                {
                    "content": "The",
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                {
                    "content": "carotenid pigments found in red crabs contribute heavily to the coloration",
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                {
                    "content": "of salmon flesh which would otherwise remain pale when fed only regular",
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                {
                    "content": "fish food.",
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                {
                    "content": "Fishery Biologist Susumu Kato reports that the vessel Lady Olga left port",
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                {
                    "content": "late this month on another trip to catch red crabs in international waters",
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                    "content": "off southern Baja, California. The entire catch has been sold in advance",
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                {
                    "content": "to two salmon rearers. Two more trips are contemplated in May and June",
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                    "content": "to fulfill current demand for the crabs. NMFS has been instrumental in",
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                    "content": "getting this fishery started.",
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                {
                    "content": "Tagged Silver Salmon Recovered",
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                    "content": "The Salmon Rearing and Release Task is a cooperative program involving",
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                    "content": "the Tiburon Laboratory, Sea Grant, California Department of Fish and",
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                {
                    "content": "Game, and the Tyee Club, a sportfishermen's organization. The objective",
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                    "content": "is to rear salmon in salt water pens for release into San Francisco Bay",
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                    "content": "to supplement the recreational fishery catch. Task Leader Susumu Kato",
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                    "content": "and Lloyd Richards, Biological Technician, report that the first year's",
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                    "content": "rearing phase ended on November 6, 1974, when about 4,000 200 gm fish",
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                    "content": "were released. All fish were marked with a coded wire tag in the nose",
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                    "content": "an external tag (Floy anchor tag. )",
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                    "content": "by an angler at the Berkeley Marina - almost directly across the Bay",
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                    "content": "from where it was released. During its 5-1/2 months at liberty the",
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                    "content": "tagged salmon had grown 5-1/2 inches in length and about a pound and",
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                    "content": "a half in weight - a remarkable growth considering growth is usually",
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                    "content": "slower in salmon during winter.",
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                    "content": "The angler who caught the tagged fish reported having caught a smaller",
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                    "content": "salmon in February and possibly a larger individual which broke the",
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                    "content": "line in March. Recovery of the externally tagged salmon lends further",
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                    "content": "credence to the reported catch of the two small salmon at the Berkeley",
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                    "content": "Marina in December.",
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                    "content": "Feed conversion studies are continuing with four tanks of silver salmon.",
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                    "content": "Initial attempts to convert directly from Oregon Moist Pellets (OMP) to",
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                    "content": "dry pellets were not successful as the fish reduced their feed intake",
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                    "content": "markedly.",
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                    "content": "This month several combinations of OMP and dry pellets were tried to",
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                    "content": "induce greater consumption. In addition, the dry pellets were moistened",
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                {
                    "content": "prior to feeding. Results indicate that texture rather than differences",
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                {
                    "content": "in taste or smell is the principal factor contributing to differences in",
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                    "content": "feed uptake.",
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                {
                    "content": "Anglers' Guide to the United States Pacific Coast",
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                    "content": "This month the Anglers' Guide, co-authored by James Squire, Fishery",
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                    "content": "Biologist at La Jolla and Susan Smith, Publications Specialist at",
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                {
                    "content": "Tiburon, was submitted to the Center Director for approval. The Guide",
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                {
                    "content": "described marine game fish, fishing grounds and angler facilities along",
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                    ]
                },
                {
                    "content": "the west coast of the United States from California to Alaska, and",
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                    ]
                },
                {
                    "content": "around the tropical islands of Hawaii, American Samoa, and Guam.",
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                    ]
                },
                {
                    "content": "The fishing chart information was sent to NOAA's Visual Services Branch",
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                },
                {
                    "content": "in Rockville, Maryland, so that cartographers can begin the task of adding",
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                {
                    "content": "information to the 40 base charts. Miss Smith also prepared a large lay-",
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                },
                {
                    "content": "out form (bluefin flat) and submitted it to G.P.O. in San Francisco for",
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                },
                {
                    "content": "printing. These forms will eventually be used for galley paste-up of the",
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                },
                {
                    "content": "book.",
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                {
                    "content": "7",
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            ],
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            ]
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        {
            "pageNumber": 9,
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                {
                    "content": "FISH",
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                },
                {
                    "content": "ENVIRONMENTAL",
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                {
                    "content": "INVESTIGATIONS",
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                {
                    "content": "Low",
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                {
                    "content": "Oxygen",
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                {
                    "content": "Levels",
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                    "content": "Studied",
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                    "content": "Possible",
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                    "content": "Barriers",
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                    "content": "Rates",
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                    "content": "bursts.",
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                    "content": "Depending",
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                    "content": "upon",
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                    "content": "motivation",
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                {
                    "content": "reserves,",
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                    "content": "period.",
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                    "content": "FISH ENVIRONMENTAL INVESTIGATIONS",
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                    ]
                },
                {
                    "content": "Low Oxygen Levels Studied as Possible Barriers",
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                    "content": "to Tuna Movement",
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                {
                    "content": "Rates of success of purse seining have been related to the characteristics",
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                },
                {
                    "content": "of the thermocline. Where the thermocline is shallow and dramatic, purse",
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                },
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                    "content": "seining is generally more effective. Low temperatures and oxygen levels",
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                    "content": "and high turbidity associated with the thermocline have been suggested as",
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                },
                {
                    "content": "acting as effective barriers to escape through the unpursed net.",
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                    "content": "Mr.",
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                    "content": "Randolph K. C. Chang and Dr. Andrew E. Dizon have initiated experiments",
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                    "content": "designed to determine how effective temperature, oxygen, salinity, and",
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                    "content": "turbidity discontinuities are to voluntary movement of tuna.",
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                {
                    "content": "To date they have completed the low oxygen study. To do this a small oval",
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                },
                {
                    "content": "tank (6' x 8' x 2' deep) was attached to a 24' diameter x 4' deep holding tank.",
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                    "content": "A small hatch (2' x 2') allowed movement between the residence tank and the",
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                    "content": "tank for food rewards and the time spent in the small tank was continously",
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                    "content": "recorded. The fish tested together for two (control treatment and test",
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                    "content": "treatment) 20 min periods every other day. Control treatment oxygen levels",
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                    "content": "were greater than 5.5 ppm and test treatment levels were less than 2.1 ppm.",
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                    "content": "and a display of ventral spots.",
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                    "content": "Behavior at high oxygen levels in the test",
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                    "content": "and from 0.8 to 3.3 min (2.0 min median) at high levels.",
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                    "content": "levels less than 2.1 ppm, this would seem to be ample time for a fish to",
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                    "content": "at speeds from a minimum of about 0.9 length/sec to 20 lengths/sec for short",
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                    "content": "which is designed primarily to measure the temperature preference of free-",
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                    "content": "with salinity gradients of about 0.075 ppt/min. At swimming speeds of 1.5",
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                    "content": "lengths/sec for a 45 cm fish, this salinity gradient is equivalent to 0.002",
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                    "content": "study with Dr. John Bardach (Hawaii Institute of Marine Biology), the effect",
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                    "content": "species involved in the fishery, and Dr. Tim Smith talked about how popu-",
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                    "content": "of the Porpoise/Tuna Program, the work has not been completed. This was",
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                    "content": "the fish in the seine.",
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                    "content": "tional aprons have been put in nets under the supervision of Mr. Jerry",
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                    "content": "Jurkovich of the Northwest Fisheries Center.",
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                    "content": "On return from their current fishing trips, the fishing captains who have",
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                    "content": "had porpoise aprons installed in their nets will provide detailed infor-",
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                    "content": "the aprons.",
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                    "content": "PHYSIOLOGY INVESTIGATIONS",
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                    "content": "acute toxicity of six aromatic crude oil components to striped bass and",
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                    "content": "bay shrimp. The chronic effects of xylene on Pacific herring embryos",
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                    "content": "accumulation. Rotifers are being exposed to daily doses of 100 ppb and",
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                    "content": "concentration is determined the depuration of residual benzene in the",
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                    "content": "rotifers will be monitored.",
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                    "content": "STOCK ASSESSMENT AND FISHERY EVALUATION INVESTIGATIONS",
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                    "content": "Oceanographic Data from Tuna Vessels to be Edited for",
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                    "content": "Computerized Data Base",
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                    "content": "Mr. Ken Brennecke, Computer Technician at the La Jolla Laboratory, began",
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                    "content": "working on a computer program to edit the existing data base containing",
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                    "content": "expendable bathythermograph (XBT) observations and weather observations",
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                    "content": "from tuna vessels. The computer program will automatically eliminate",
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                    "content": "duplicate and spurious observations from the data, thus reducing the",
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                    "content": "amount of labor time required in preparation of data analysis.",
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                    "content": "Arrangements were also made for acquiring from NORPAX, magnetic tapes",
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                    "content": "by the U. S. Navy's Fleet Numerical Weather Central, Monterey, California,",
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                    "content": "since the early 1960's. The XBT profiles from this source will supplement",
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                    "content": "those collected by tuna vessels since 1971, and will help to \"fill in the",
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                    "content": "gaps\" where sparsity of data has proved a hindrance to reliable ocean",
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                    "content": "thermal structure analysis. The summarization of all existing XBT obser-",
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                    "content": "vations by 1° squares and by month will begin soon. Further examination",
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                    "content": "of the relationship between fishing success and ocean thermal structure",
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                    "content": "will be facilitated by this new data.",
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                    "content": "Tuna Vessels Weather and XBT Reporting Rate is Up",
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                {
                    "content": "tropical Pacific participated in the radio weather reporting program of",
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                    "content": "the Real-Time Fishing Systems Task at the La Jolla Laboratory.",
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                    "content": "Substantial",
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                    "content": "quantities of both weather and XBT observations were recorded.",
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                    "content": "April Reporting Rates",
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                    "content": "Weather Observations",
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                    "content": "XBT Observations",
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                    "content": "Total",
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                    "content": "1974",
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                    "content": "297",
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                    "content": "42",
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                    "content": "339",
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                    "content": "1975",
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                    "content": "328",
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                    "content": "81",
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                    "content": "409",
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                    "content": "% Increase",
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                    "content": "+9%",
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                    "content": "+48%",
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                    "content": "Total",
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                    "content": "217",
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                    "content": "Mr. Ted Murphy, a recent graduate of Colorado State University, has",
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                    "content": "Laboratory as a Fishery Biologist. At Colorado State University, Mr.",
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                    "content": "cutthroat trout in the Yellowstone National Park. In his new assign-",
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                    "content": "ment at the La Jolla Laboratory he will be involved in stock assessment",
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                {
                    "content": "of Atlantic tunas.",
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                    "content": "STOCK AND RECRUITMENT INVESTIGATIONS",
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                    "content": "Project Begun to Evaluate Starvation as Cause of",
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                    "content": "Mortality in Jack Mackerel Larva",
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                    "content": "project this month to evaluate starvation as a cause of mortality in jack",
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                    "content": "mackerel larvae.",
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                    "content": "Jack mackerel are of major importance in the California",
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                    "content": "wetfish fishery. The major objective of Ms. Theilacker's study is to",
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                    "content": "establish histological criteria for estimating the extent of starvation",
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                    "content": "in sea-caught jack mackerel larvae. Once these criteria are established,",
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                    "content": "sea-caught larvae will be examined to determine the incidence of starvation.",
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                    "content": "mortality and therefore the relationships between stock size and recruitment.",
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                    "content": "The first step in her work will be to establish starvation criteria through",
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                    "content": "laboratory experimentation. She plans to collect jack mackerel eggs at",
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                    "content": "sea and rear the larvae in the laboratory under controlled conditions.",
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                    "content": "Ms .",
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                    "content": "growth in larvae at various stages of development and compare these samples",
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                    "content": "to those taken from larvae that have been starved.",
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                    "content": "Experiments to Establish Suitability of Dinoflagellate for",
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                    "content": "First-Feeding Anchovy Larvae Initiated",
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                    "content": "Experiments have been initiated this month by Dr. Edward Scura, Physiologist",
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                    "content": "at the La Jolla Laboratory, to establish the suitability of the dinoflagel-",
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                    "content": "late, Gonyaulax polyedra, as a food for first-feeding anchovy larvae. Data",
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                    "content": "collected by Dr. Lasker during the past several months indicates that there",
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                    "content": "indicate that although anchovy larvae readily feed on this organism, growth",
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                    "content": "15",
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            "lines": [
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                    "content": "and survival is reduced when compared to larvae fed the dinoflagellate,",
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                {
                    "content": "Gymnodinium splendens. G. splendens is routinely used at the La Jolla",
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                    "content": "Laboratory as a food for first-feeding larvae and it was the predominant",
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                {
                    "content": "organism in the chlorophyll maximum along the coast of the Los Angeles",
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                    "content": "Bight during the spring of 1974.",
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                {
                    "content": "Plankton Microstructure in Coastal Waters off California",
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                    "content": "to be Investigated",
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                {
                    "content": "In April, Dr. Robert Owen, Oceanographer at the La Jolla Laboratory, began",
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                    "content": "organizing an investigation of plankton microstructure in coastal waters",
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                    "content": "off California. This work is essential for an understanding of the sur-",
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                    "content": "and in the laboratory indicate that the average food density in this area",
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                    "content": "on plankton microstructure.",
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                    "content": "species, and association of fish larvae with higher density zones of food-",
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                    "content": "sized particles.",
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                    "content": "In connection with this proposed study, parts for a water sampler system",
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                    "content": "for sampling at 20 cm intervals vertically were obtained from Joris Gieskes",
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                    "content": "of Scripps Institution of Oceanography. A new frame is being designed",
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                    "content": "so that close-spaced samples can be obtained from mid-water depths, expec-",
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                    "content": "ially in the vicinity of the chlorophyll maximum zone.",
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                    "content": "Dr. John Hunter, Fishery Biologist and Ms. Carol Sanchez, Biological",
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                    "content": "Technician, continued their work on the feeding ecology of Pacific mackerel.",
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                    "content": "on feeding success of mackerel. They also began work on rearing Pacific",
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                    "content": "mackerel at 16℃ to complete a study of the effect of temperature on growth",
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                    "content": "of mackerel.",
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                    "content": "Dr. Hunter completed a manuscript entitled, \"Behavior and survival of",
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                    "content": "northern anchovy (Engraulis mordax) larvae\". This paper is a contribution",
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                    "content": "to a symposium on fishery science held in Ensenda, Mexico in February 1975.",
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                    "content": "NSF Researcher at SWFC Studies Behavior of Larval Fish",
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                    "content": "and Their Prey Utilizing Schlieren Optical System",
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                    "content": "Through a grant from the Oceanography Section of the National Science",
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                    "content": "Foundation (NSF) to the Regents of the University of California, Dr. John",
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                    "content": "H. Taylor, principal investigator under the NSF grant, with the cooperation",
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                    "content": "of Drs. Reuben Lasker and John Hunter of the La Jolla Laboratory, has begun",
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                    "content": "work on a large-aperture Schlieren optical system that will permit obser-",
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                    "content": "that are normally difficult to see or to photograph in sea water. The",
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                    "content": "Schlieren system will be used in studies of the behavior of larval fish",
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                    "content": "and their prey at the Southwest Fisheries Center.",
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                    "content": "The optical system will be based on a pair of 12 inch concave mirrors that",
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                    "content": "allow a sample area of more than 750 cm2 to be studied. By the use of this",
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                    "content": "apparatus. Organisms in the range from 1 centimeter down to 50 microns. or",
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                    "content": "Schlieren system may be modified to give images that may be color-coded",
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                    "content": "according to the degree of refraction produced by the organisms, and the",
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                    "content": "device may be modified to give three-dimensional photographs as well.",
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                    "content": "Further, it will be possible to visualize or photograph the occurrence of",
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                    "content": "temperature and salinity gradients and the organism's response to them.",
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                    "content": "NOAA Research Associate Reports Advances in Work on the",
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                    "content": "she has now maintained the commercially important squid, Loligo opalescens,",
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                    "content": "in the laboratory from the time of hatching to a maximum age of 100 days.",
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                    "content": "squid/day; 4 week old squid:",
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                    "content": "43 anchovy larvae/squid/day; 4 week old squid:",
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                },
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                    "content": "302 Artemia nauplii/squid/day.",
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                    "content": "the adults.",
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                        5.544,
                        4.6547,
                        2.0756,
                        4.6318
                    ],
                    "spans": [
                        {
                            "offset": 38513,
                            "length": 40
                        }
                    ]
                },
                {
                    "content": "Mantle length = 1.98 + 0.081 age (in days)",
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                    "spans": [
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                    ]
                },
                {
                    "content": "The length to weight relationship takes the following form:",
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                    "spans": [
                        {
                            "offset": 38597,
                            "length": 59
                        }
                    ]
                },
                {
                    "content": "Log weight = - 1.22 + 2.37 log length",
                    "polygon": [
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                    "spans": [
                        {
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                            "length": 37
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                    ]
                },
                {
                    "content": "Respiration data was obtained for squid at different ages and temperatures.",
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                    ]
                },
                {
                    "content": "Average values are:",
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                    ]
                },
                {
                    "content": "Age",
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                    ],
                    "spans": [
                        {
                            "offset": 38791,
                            "length": 3
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                    ]
                },
                {
                    "content": "Temperature",
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                    "spans": [
                        {
                            "offset": 38795,
                            "length": 11
                        }
                    ]
                },
                {
                    "content": "m102/mg",
                    "polygon": [
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                    "spans": [
                        {
                            "offset": 38807,
                            "length": 7
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                    ]
                },
                {
                    "content": "dry wt./hour",
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                    "spans": [
                        {
                            "offset": 38815,
                            "length": 12
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                    ]
                },
                {
                    "content": "Newly hatched squid",
                    "polygon": [
                        1.8007,
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                    "spans": [
                        {
                            "offset": 38828,
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                    ]
                },
                {
                    "content": "10℃",
                    "polygon": [
                        3.9679,
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                        {
                            "offset": 38848,
                            "length": 3
                        }
                    ]
                },
                {
                    "content": "1.5",
                    "polygon": [
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                    "spans": [
                        {
                            "offset": 38852,
                            "length": 3
                        }
                    ]
                },
                {
                    "content": "Newly hatched squid",
                    "polygon": [
                        1.8052,
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                        {
                            "offset": 38856,
                            "length": 19
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                    ]
                },
                {
                    "content": "15°C",
                    "polygon": [
                        3.9724,
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                    "spans": [
                        {
                            "offset": 38876,
                            "length": 4
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                    ]
                },
                {
                    "content": "2.5",
                    "polygon": [
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                        {
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                            "length": 3
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                    ]
                },
                {
                    "content": "Newly hatched squid",
                    "polygon": [
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                    ]
                },
                {
                    "content": "20°C",
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                        {
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                            "length": 4
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                    ]
                },
                {
                    "content": "3.5",
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                        {
                            "offset": 38910,
                            "length": 3
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                    ]
                },
                {
                    "content": "21 day old squid",
                    "polygon": [
                        1.8007,
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                    "spans": [
                        {
                            "offset": 38914,
                            "length": 16
                        }
                    ]
                },
                {
                    "content": "15℃",
                    "polygon": [
                        3.9724,
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                        {
                            "offset": 38931,
                            "length": 3
                        }
                    ]
                },
                {
                    "content": "3.5",
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                    "spans": [
                        {
                            "offset": 38935,
                            "length": 3
                        }
                    ]
                },
                {
                    "content": "58 day old squid",
                    "polygon": [
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                    "spans": [
                        {
                            "offset": 38939,
                            "length": 16
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                    ]
                },
                {
                    "content": "15°C",
                    "polygon": [
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                    ]
                },
                {
                    "content": "3.7",
                    "polygon": [
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                    "spans": [
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                    ]
                },
                {
                    "content": "Respiration and growth data and intended to be used to evaluate the overall",
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                    ]
                },
                {
                    "content": "feeding potential of squid and their position impact as predators on fish",
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                    ]
                },
                {
                    "content": "larvae.",
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                    ]
                },
                {
                    "content": "17",
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                    ]
                }
            ],
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            ]
        },
        {
            "pageNumber": 19,
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            "words": [
                {
                    "content": "CalCOFI",
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                    "content": "Plankton",
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                    "content": "Collection",
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                    "content": "to",
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                    "content": "be",
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                {
                    "content": "Analyzed",
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                {
                    "content": "in",
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                {
                    "content": "Study",
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                    "confidence": 0.997,
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                    "content": "Invertebrate",
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                    "content": "Predators",
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                    "content": "Larval",
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                    "content": "Anchovy",
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                    "content": "A",
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                    "content": "was",
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                    "content": "held",
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                    "content": "Jolla",
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                    "content": "consider",
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                    "content": "experimental",
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                    "content": "design",
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                    "content": "the",
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                    "content": "transcribe the existing data into this form for automatic data processing.",
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                    "content": "fisheries off California.\" The information in this manuscript is based",
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                    "content": "During the course a total of 204 life history series was studied, belong-",
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                    "content": "ing to 92 fish families. About 10% of the series are based on Atlantic",
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                    "content": "in both the Atlantic and Pacific, hence there is considerable transference",
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                    "content": "of background as between oceans.",
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                    "content": "The contribution on carangid larvae, presented by Dr. Ahlstrom and Ms.",
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                    "content": "Barbara Sumida at the Ensenada Symposium, has been reworked, edited, and",
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                    "content": "is now in final form for publishing.",
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                    "content": "The contribution titled, \"Report on neuston (surface) collections made",
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                    "content": "on an extended CalCOFI cruise during May 1972\", by Dr. Ahlstrom and Ms.",
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                    "content": "Elizabeth Stevens, is being revised before submission as a contribution",
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                    "content": "to the CalCOFI Report series.",
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                    "content": "Dr. G. Moser, Fishery Biologist, gave the lecture in the ichthyoplankton",
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                    "content": "course dealing with scorpaenids and assisted in the laboratory work. He",
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                    "content": "is editing his handbook dealing with life history series of scorpaenid",
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                    "content": "fishes.",
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                    "content": "Experiments on Maturation and Spawning of Striped Bass",
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                    "content": "Approaching Completion",
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                    "content": "Dr. Reuben Lasker and Mr. K. Lal of the California Department of Fish and",
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                    "content": "Game report that during April, four hormone-injected female striped bass",
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                    "content": "held in sea water attained ripe condition and were spawned. Eggs and milt",
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                    "content": "from a ripe male were stripped into fresh water, but very few larvae hatched",
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                    "content": "from this fertilization.",
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                    "content": "Two females developed eggs as large as 0.6 and 0.7 mm diameter in February",
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                    "content": "1975 after being kept under constant spring-like conditions since August 1974.",
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                    "content": "To enhance ripening, these fish were injected with salmon pituitary. In",
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                    "content": "March, both fish had eggs of 0.8 mm diameter and were injected with human",
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                    "content": "chorionic gonadotropin (HCG). Biopsy after 2 weeks showed the presence of",
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                    "content": "green ova (typical of the ripe condition) up to 1.2 mm diameter and the fish",
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                    "content": "were reinjected with HCG for spawning. Unlike the previous cases, these",
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                    "content": "two females spawned after a series of three injections over a 6 week period.",
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                    "content": "The",
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                    "content": "on three stations, Winter 1975, in the California Current - A preliminary",
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                    "content": "summarized",
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                    "content": "assistance",
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                    "content": "of",
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                    "content": "the",
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                    "content": "Pacific",
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                    "content": "Environmental",
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                    "content": "Group,",
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                    "content": "NMFS,",
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                {
                    "content": "Monterey.",
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                {
                    "content": "Preliminary",
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                    "content": "processing",
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                    "content": "of",
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                    "content": "the",
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                    "content": "21",
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            ],
            "lines": [
                {
                    "content": "created and suggested outputs are being evaluated. The primary outputs",
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                    "content": "will be time series of sized larvae region and by a group of eight sec-",
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                    "content": "tions, five normal to, and three parallel to the coast. Inquiries by",
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                    "content": "those interested may be directed to Roger Hewitt, Larry Eber, Bob Owen",
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                    "content": "or Paul Smith.",
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                    "content": "Dr. Smith consulted with Dr. Frank Augustine of the Energy and Resources",
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                    "content": "Division of the Aerospace Corporation on April 28 to assist in unifying",
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                    "content": "the ichthyoplankton sampling criteria of the NMFS sampling program (Bongo",
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                    "content": "nets) and the sampling criteria of the Department of the Interior, Bureau",
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                    "content": "of Land Management, Marine Minerals Division for the Outer Continental",
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                    "content": "Shelf environmental studies program. This program is involved in com-",
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                    "content": "piling baseline data and designing a monitoring system for critical en-",
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                    "content": "vironmental parameters to ensure that oil and gas exploration and develop-",
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                    "content": "ment on the Outer Continental Shelf do not cause quality deterioration of",
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                    "content": "the environment.",
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                    "content": "* *",
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                    "content": "Dr. Paul Smith, Fishery Biologist and Ms. Sharon Duke, Statistical",
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                    "content": "Assistant, at the La Jolla Laboratory, submitted a report on the inshore-",
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                    "content": "offshore distribution of anchovy eggs and larvae to the University-State-",
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                    "content": "Federal Anchovy Working Group. Administrative Report no. LJ-75-58,",
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                },
                {
                    "content": "\"Nearshore distribution of northern anchovy eggs and larvae (Engraulis",
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                {
                    "content": "mordax)\" summarizes the incidence of eggs and larvae in 5 mile bands near",
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                    "content": "the coast and offshore islands, in 10 mile bands in the offshore area and",
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                    "content": "the seaward incidence of eggs and larvae. The report was prepared from",
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                },
                {
                    "content": "data collected on the Pt. Arguello area environmental impact analysis",
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                    "content": "prepared for the Atomic Energy Commission by Senior Scientist Elbert",
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                },
                {
                    "content": "Ahlstrom in July 1965.",
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                    "content": "Scientists from NMFS, California Department of Fish and Game and the Scripps",
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                },
                {
                    "content": "Institution of Oceanography participating in the Anchovy Workshop are",
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                    ]
                },
                {
                    "content": "assembling and comparing all assessment methods now available for use in",
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                },
                {
                    "content": "the management of the anchovy fisheries.",
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                    ]
                },
                {
                    "content": "Preparation of Long-Term Monthly Mean Sea Surface Temperature",
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                    ]
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                    "content": "Charts in Process for the Pacific Ocean",
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                    "content": "Messrs. L. Eber, Meteorologist, F. Miller, Meteorologist with the Inter-",
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                },
                {
                    "content": "American Tropical Tuna Commission, and J. Renner, Fishery Biologist have",
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                    "content": "entered into a joint effort to prepare for publication, charts of monthly",
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                    "content": "mean sea surface temperature and of seasonal (month to month) changes",
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                {
                    "content": "in the North and Eastern tropical Pacific Ocean. The charts will be based",
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                    "content": "Dr. Gary Stauffer, Fishery Biologist at the La Jolla Laboratory and Mr.",
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                    "content": "to Tiburon Laboratory. Next trial shipment will be preceded by 3 months",
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                    "content": "threadfin shad from Wahiawa Reservoir for fishing tests during the 1975",
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                    "content": "skipjack tuna season. A proposal was prepared for PTDF participation in",
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                    "content": "Development Program to Tiburon to start work on 1) above.",
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                    "content": "Continuing in the assessment of other tuna and tunalike resources as",
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                    "content": "Fishery Biologist Richard N. Uchida worked on a paper, \"A summary of",
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                    "content": "environmental and tuna fishing information of the U.S. Trust Territory",
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                    "content": "of the Pacific Islands.\"",
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                    "content": "He also reviewed and worked on revisions of",
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                    "content": "the paper \"The Pacific tuna pole-and-line live-bait fisheries\" which",
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                    "content": "he is authoring jointly with Messrs. Howard Yoshida and Tamio Otsu.",
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                    "content": "Mr. Uchida and Ms. Lucille Tsukano collaborated in updating the 1974",
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                    "content": "Hawaii Division of Fish and Game's skipjack catch reports and flagline",
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                    "content": "catch reports. Ms. Tsukano rechecked and corrected all the skipjack",
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                    "content": "bait reports. The decks of skipjack bait catches, skipjack catches,",
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                    "content": "flagline bait catches, and flagline catches for 1974 are now complete",
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                    "content": "and may be used in data processing.",
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                    "content": "catches in the area of Midway for west coast albacore trolling boats",
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                    "content": "that are heading there. Mr. Hida also worked on manuscript review and",
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                    "content": "revision of the manuscript \"Baitfish study in Majuro, Marshall Islands\"",
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                    "content": "by Hida and Uchiyama.",
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                {
                    "content": "of",
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                    "content": "food",
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                    "content": "particles.",
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                    "content": "25",
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                    "content": "April 30",
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                    "content": "The Honolulu Laboratory contributed an interest-",
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                    "content": "ing display and movie to the Federal Day presen-",
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                    "content": "tation on April 30. This was held in the Coral",
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                    "content": "Ballroom of the Hilton Hawaiian Village Hotel in",
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                    "content": "conjunction with the annual luncheon honoring",
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                {
                    "content": "nominees for the outstanding federal employee",
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                    "content": "awards.",
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                    "content": "SEMINARS",
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                },
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                    "content": "Honolulu Laboratory",
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                    "content": "April",
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                    "content": "9",
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                },
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                    "content": "Dr. Paul Struhsaker, Fishery Research Biologist,",
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                },
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                    "content": "gave a seminar on fishes and crustacean resources",
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                },
                {
                    "content": "of the tropical upper slope zone at the Honolulu",
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                    "content": "Laboratory.",
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                {
                    "content": "23",
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                },
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                    "content": "Dr. Brian J. Rothschild, SWFC Director, spoke on",
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                },
                {
                    "content": "extended jurisdiction to Honolulu Laboratory staff",
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                },
                {
                    "content": "members and guests.",
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                },
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                    "content": "La Jolla Laboratory",
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                    "content": "April",
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                {
                    "content": "3",
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                },
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                    "content": "Professor Joseph Reid, Director, Marine Life",
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                    "content": "Research Group, Scripps Institution of Oceanography",
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                },
                {
                    "content": "presented a lecture entitled, \"Geostrophic flow",
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                },
                {
                    "content": "at various deep pressure surfaces in the Pacific",
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                },
                {
                    "content": "Ocean\".",
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                {
                    "content": "MEETINGS AND TRAVEL",
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                    ]
                },
                {
                    "content": "(Unless otherwise mentioned in text)",
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                {
                    "content": "March 21 -",
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                },
                {
                    "content": "April 11",
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                    ]
                },
                {
                    "content": "Dr. Ed Scura, Physiologist, La Jolla Laboratory,",
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                {
                    "content": "traveled to Woods Hole, Massachusetts to join the",
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                    ]
                },
                {
                    "content": "research vessel Atlantic II for a cruise, sponsored",
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                },
                {
                    "content": "by the Brookhaven National Laboratory, off Long",
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                },
                {
                    "content": "Island. Dr. Scura's participation in the cruise",
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                },
                {
                    "content": "was in connection with the NMFS-Brookhaven contract",
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                },
                {
                    "content": "on the investigation of the causes of larval fish",
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                },
                {
                    "content": "mortality in the New York Bight and the Los Angeles",
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                {
                    "content": "Bight. During the cruise Dr. Scura used the plankton",
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                },
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                    "content": "pump and towed a plankton net to collect fish larvae",
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                    "content": "and to assess the kinds and densities of larval food",
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                },
                {
                    "content": "particles.",
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                    "content": "25",
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                {
                    "content": "March",
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                    "content": "31-",
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                    "content": "April",
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                {
                    "content": "9",
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                },
                {
                    "content": "Center",
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                    "content": "Director",
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                    "content": "Brian",
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                    "content": "J.",
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                    "content": "and met all afternoon with Mr. Shomura and Investigation",
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                    "content": "Diego Friday at noon.",
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                    "content": "Department of Fish and Game's Elk Grove Hatchery. The",
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                    "content": "main purpose of the hatchery is to provide striped bass",
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                    "content": "for stocking reservoirs.",
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                    "content": "26",
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                    "content": "Messrs. Wilvan Van Campen and Frank Alverson (Living",
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                    "content": "Marine Resources) met with Messrs. Shomura and Iversen",
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                    "content": "to discuss PIDC/PTDF matters. Messrs. Van Campen and",
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                    "content": "Territory representatives regarding PTDF/PIDC.",
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                    "content": "29",
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                    "content": "Ms. Hazel Nishimura attended a luncheon meeting at",
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                    "content": "Gateway House sponsored by the Pacific Islands Studies",
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                    "content": "Program of the University of Hawaii for the purpose of",
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                    "content": "bringing together UH-related units with different",
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                    "content": "organizational objectives but a common interest in the",
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                    "content": "use of published materials relating to Hawaii and the",
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                    "content": "other Pacific Islands.",
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                    "content": "Thailand.",
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                    "content": "Sixth International Publications Competition.",
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                    "content": "Fisheries Center since Dr. Reuben Lasker of the La Jolla Laboratory served",
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                    "content": "Orr,",
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                    "content": "-",
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                    "content": "Transactions of the American Fisheries Society, both outstanding publications",
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                    "content": "in the field.",
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                    "content": "Lt. Roger P. Hewitt, NOAA Corps, who has been assigned to the NMFS",
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                {
                    "content": "Southwest Fisheries Center since June 1973, has been informed that he has",
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                    "content": "been selected for assignment in the Fall of 1975 to full-time graduate",
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                    "content": "training in the Applied Ocean Sciences Department, Scripps Institution of",
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                    "content": "Oceanography, University of California, San Diego, pending approval of the",
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                    "content": "Associate Administrator of NOAA.",
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                    "content": "March 16",
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                    "content": "Howard 0. Yoshida, Fishery Biologist, Quality",
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                {
                    "content": "Increase - Honolulu Laboratory",
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                    "content": "Shoji Teramoto, Supply Clerk, Quality Increase",
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                    "content": "Honolulu Laboratory",
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                    "content": "Thomas K. Kazama, Biological Technician, Outstanding",
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                {
                    "content": "Henry Orr, Office Draftsman, Cash Award - La Jolla",
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            "content": "SOUTHWEST FISHERIES CENTER"
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            "content": "RECEIVED JUN 1 6 1975"
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            "content": "MONTHLY REPORT - APRIL 1975"
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            "content": "TIBURON MARINE LABORATORY"
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            "content": "Publications"
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            "content": "Albacore Oceanography Cruise Slated on Newly"
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            "content": "Reactivated NOAA Research Vessel Cromwell 4"
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            "content": "Tagged Silver Salmon Recovered"
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            "content": "Low Oxygen Levels Studied as Possible Barriers"
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            "content": "to Tuna Movements 8"
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            "content": "All NMFS Porpoise Observer Trips Completed During"
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            "content": "1975 Open Tuna Fishing Season 10"
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            "content": "Research on Effects of Aromatic Hydrocarbons on"
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            "content": "Marine Organisms Nears Completion 11"
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            "content": "Tuna Vessels Weather and XBT Reporting Rate is Up 13"
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            "content": "Experiments to Establish Suitability of Dinoflagellate for First-Feeding Anchovy Larvae Initiated 14"
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            "content": "NSF Researcher at SWFC Studies Behavior of Larval Fish"
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            "content": "and Their Prey Utilizing Schlieren Optical System 16"
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            "content": "Sampling Properties of MARMAP Bongo Nets and CalCOFI Standard Net to be Evaluated . 20"
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            "content": "Plan Submitted to IOC for Future Oceanic Surveys Off Peru to Analyze Impact of \"El Nino\" 22"
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            "content": "Recommendations Made on Future Direction of Honolulu Laboratory Baitfish Project . 23"
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            "content": "SOUTHWEST FISHERIES CENTER LA JOLLA, CALIFORNIA"
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            "content": "HONOLULU LABORATORY LA JOLLA LABORATORY TIBURON LABORATORY"
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            "content": "MONTHLY REPORT - APRIL 1975"
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            "content": "STATUS OF PUBLICATIONS"
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            "content": "Clark, N. E., L. Eber, R. M. Laurs, J. A. Renner, and J. F. T. Saur. 1974. Heat exchange between ocean and atmosphere in the eastern North Pacific for 1961-71. NOAA Tech. Rep. NMFS SSRF-682,108 p."
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            "content": "Summaries of large-scale heat exchange between ocean and atmos- phere in the eastern North Pacific Ocean are presented for the period 1961 through 1971. The summaries are based on computations made from synoptic marine radio weather reports and include 1) monthly values of total heat exchange and departures from a long-term mean; 2) long-term monthly mean values of the total heat exchange, incoming solar radiation, effective back radiation, and evaporative and sensible heat transfer; and 3) annual cycles of total heat exchange for selected areas."
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            "content": "Outstanding spatial and temporal features of the heat exchange values are discussed. However, little detail is given since this is a summary report, and readers can draw their own conclusions depending upon the intended use of the charts."
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            "content": "Comparisons are also made between the total heat exchange values and those given in two other reports. Discrepancies between values given in this report and those published in the other reports are attributed to differences in the empirical equations used to make the heat exchange computations, differences in data processing techniques, differences in the observed data used in the computa- tions due to difference methods of acquisition, and the possibility of ocean climate changes."
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            "content": "This report does not constitute publication and is for information only."
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                }
            ],
            "content": "Hobson, Edmund S. 1975. First California record of the serranid fish Anthias gordensis Wade. Calif. Fish Game, 61(2): 111-112."
        },
        {
            "spans": [
                {
                    "offset": 2954,
                    "length": 111
                }
            ],
            "boundingRegions": [
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                    "pageNumber": 3,
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                }
            ],
            "content": "This paper reports the first record of this sea bass species to be collected in California (and U. S. ) waters."
        },
        {
            "spans": [
                {
                    "offset": 3066,
                    "length": 127
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            ],
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                }
            ],
            "content": "Green, Roger E. 1975. A preliminary list of fishes collected from Richardson Bay, California. Calif. Fish Game, 61(2): 104-106."
        },
        {
            "spans": [
                {
                    "offset": 3194,
                    "length": 412
                }
            ],
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            ],
            "content": "This paper gives a preliminary list of fishes collected in Richardson Bay (part of the San Francisco Bay system) from June 1972 to July 1973. Sampling methods are described for the difference life stages collected: eggs and larvae, juveniles and adult fishes. Two species on the list have not been reported previously from San Francisco Bay: roughtail skate (Raja trachura) and white seabass (Cynoscion nobilis)."
        },
        {
            "spans": [
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                    "offset": 3607,
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            ],
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                }
            ],
            "content": "Miller, Forrest R. and R. Michael Laurs. 1975. The El Nino of 1972- 1973 in the eastern tropical Pacific Ocean. Inter-Am. Trop. Tuna Comm. Bull., 16(5): 403-448."
        },
        {
            "spans": [
                {
                    "offset": 3769,
                    "length": 971
                }
            ],
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                    ]
                }
            ],
            "content": "Beginning in February 1972 the usual seasonal cooling of the surface water of the eastern Pacific Ocean in the region of the Peru Current and along the equator failed to develop. By July tropical coastal and equatorial island stations and ships crossing the equator were recording sea-surface temperatures which were 6° to 8ºF (3.3º-4.4℃) above the long-term mean. The anomalies spread over most of the eastern tropical Pacific and westward into the central equatorial Pacific through September. During October, surface temperatures at coastal stations along South America were returning to normal, but in November and December 1972 temperatures rose rapidly again, with a near-record temperature anomaly of 81ºF (4.2℃) above the long-term mean recorded at Puerto Chicama, Peru (7º42'S,79º27'W). After January 1973 sea surface temperatures began returning rapidly to normal over most of the eastern tropical Pacific, and by March 1973 the El Nino had completed its cycle."
        },
        {
            "spans": [
                {
                    "offset": 4741,
                    "length": 635
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            ],
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                }
            ],
            "content": "Monthly sea-surface temperature anomalies over the eastern tropical Pacific are discussed to show the extent and magnitude of warming. Annual temperature profiles at several South American coastal and equatorial island stations are compared with temperature profiles for the 1957-1958 and 1965 El Nino year. Characteristics of the temperature anomaly profiles at Puerto Chicama during several very warm years for the 1925-1972 period are also compared. Finally, meteorological factors contributing to a relaxation of the south- east trade winds and to the decreased upwelling along the coast of South America in 1972-1973 are examined."
        },
        {
            "spans": [
                {
                    "offset": 5377,
                    "length": 1
                }
            ],
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            ],
            "content": "2"
        },
        {
            "spans": [
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                    "length": 259
                }
            ],
            "boundingRegions": [
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                }
            ],
            "content": "Shomura, Richard S., and Francis William (editors). 1975. Proceedings of the International Billfish Symposium, Kailua-Kona, Hawaii, August 9-12, 1972, Part 1. Report of the Symposium. U. S. Dep. Commer., Natl. Mar. Fish. Serv., Spec. Sci. Rep. Fish. 675, 33p."
        },
        {
            "spans": [
                {
                    "offset": 5639,
                    "length": 181
                }
            ],
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                    ]
                }
            ],
            "content": "Skillman, Robert A. 1975. An assessment of the South Pacific albacore, Thunnus alalunga, fishery, 1953-72. U. S. Natl. Mar. Fish Serv., Mar. Fish Rev. 37(3): 9-17. (MFR Paper 1127)."
        },
        {
            "spans": [
                {
                    "offset": 5821,
                    "length": 568
                }
            ],
            "boundingRegions": [
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                    ]
                }
            ],
            "content": "From the mid-1960's through the early 1970's, markedly increased effort expended in the South Pacific albacore, Thunnus alalunga (Bonnaterre), fishery was met with a decline of more than 60% in apparent abundance. Further increases in harvesting pressure are proposed. These factors have prompted an assessment of the fishery. Based on the generalized production model of Pella and Tomlinson, a 25% increase in fishing effort over the 1971 level will result in either a small increase in catch or a substantial decline, depending on the measure of fishing effort used."
        },
        {
            "spans": [
                {
                    "offset": 6390,
                    "length": 11
                }
            ],
            "boundingRegions": [
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                    "pageNumber": 4,
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                }
            ],
            "content": "Translation"
        },
        {
            "spans": [
                {
                    "offset": 6402,
                    "length": 378
                }
            ],
            "boundingRegions": [
                {
                    "pageNumber": 4,
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                }
            ],
            "content": "Suisan Shuho. 1975. The life blood of the skipjack tuna pole-and-line fishery - The problem of baitfish (anchovy) mortality (Katsuo ippon zuri no seimeisen - Katakuchi tairyo-shi no wadai wo otte). Suisan Shuho (The Fishing and Food Industry Weekly) 731: 16-17. January 25, 1975. (Translated from Japanese by Tamio Otsu, 1975, 4 p., Transla- tion No. 11) [Limited distribution.]"
        },
        {
            "spans": [
                {
                    "offset": 6781,
                    "length": 27
                }
            ],
            "boundingRegions": [
                {
                    "pageNumber": 4,
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                }
            ],
            "content": "Approved by Center Director"
        },
        {
            "spans": [
                {
                    "offset": 6809,
                    "length": 134
                }
            ],
            "boundingRegions": [
                {
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                    ]
                }
            ],
            "content": "\"DDT and its metabolites in the sediments off Southern California\" by John S. MacGregor. For publication in the Fishery Bulletin, U.S."
        },
        {
            "spans": [
                {
                    "offset": 6944,
                    "length": 166
                }
            ],
            "boundingRegions": [
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                    ]
                }
            ],
            "content": "\"Behavior and survival of northern anchovy Engraulis mordax larvae\" by John R. Hunter. For publication in the Symposium in Fisheries Biology, Ensenada, B. C., Mexico."
        },
        {
            "spans": [
                {
                    "offset": 7111,
                    "length": 180
                }
            ],
            "boundingRegions": [
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                    ]
                }
            ],
            "content": "\"Early life history studies of eastern Pacific carangids\" by Elbert H. Ahlstrom and Barbara Y. Sumida. For publication in the Symposium in Fishery Biology, Ensenada, B. C., Mexico."
        },
        {
            "spans": [
                {
                    "offset": 7292,
                    "length": 155
                }
            ],
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                }
            ],
            "content": "\"Acclimation and rearing of striped bass larvae in sea water\" by Krishan Lal, Reuben Lasker and Andrew Kuljis. For publication in California Fish and Game."
        },
        {
            "spans": [
                {
                    "offset": 7448,
                    "length": 1
                }
            ],
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            "content": "3"
        },
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            ],
            "content": "ALBACORE FISHERIES INVESTIGATIONS"
        },
        {
            "spans": [
                {
                    "offset": 7484,
                    "length": 3
                }
            ],
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            ],
            "content": ". ."
        },
        {
            "spans": [
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                    "length": 86
                }
            ],
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            ],
            "content": "Albacore Oceanography Cruise Slated on Newly Reactivated NOAA Research Vessel Cromwell"
        },
        {
            "spans": [
                {
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                    "length": 456
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            ],
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            ],
            "content": "Preparations are underway for a 17 day albacore oceanography cruise aboard the NOAA research vessel, Townsend Cromwell, June 16 to July 10. Messrs. R. Lynn, Cruise Leader, accompanied by K. Bliss, T. Mulitauaopele, and R. Dotson of the Albacore-Oceanography project at the La Jolla Labor- atory will participate. This cruise will take advantage of the transfer of the Cromwell to Kewalo Basin, Honolulu after its recent reactivation in Seattle, Washington."
        },
        {
            "spans": [
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            ],
            "content": "The Seattle-Honolulu track needs only a small modification to permit a repeat of the central transect (40° to 30°N along 137°30'W) of the offshore albacore surveys conducted in the three preceeding years (1972- 74) at this same time of year. According to Oceanographer Lynn, the objectives of this cruise are 1) to collect oceanographic data to further evaluate the relationships between oceanographic features and the early seasonal distribution and apparent abundance of albacore tuna in offshore waters, as indicated by American Fishermen's Research Foundation charter vessels and independent fishing vessels catches; 2) to measure the lo- cation and strength of the subtropic and subarctic fronts associated with the boundaries of the Transition Water between the Pacific Subarctic and North Pacific Central Water masses; 3) to gather data across the California Current to make estimates of momentum and transport. In addi- tion, a limited effort will be made to transport several live albacore to Kewalo Basin for physiological experiments."
        },
        {
            "spans": [
                {
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            ],
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            ],
            "content": "Mr. Lynn is preparing detailed cruise plans. Salinity-temperature-depth (STD) casts to 1,000 meters will be conducted along the entire track from Seattle to Honolulu if time permits."
        },
        {
            "spans": [
                {
                    "offset": 9261,
                    "length": 734
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            ],
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            ],
            "content": "Mr. Lynn plans to concentrate major effort along the 137º30'W transect; trolling will be conducted along this entire transect (Cromwell will lay-to during the hours of darkness), STD stations will be spaced at 46 km intervals and neuston tows will be conducted at every other station. Daily radio communications will be maintained with four fishing vessels on charter to the American Fishermen's Research Foundation and with independent fishing vessels to exchange fishing, oceanographic, and weather information as needed. Radio communications will be conducted with Western Fishboat Owner's station WHG for coordination with the charter operation control. Outside of the 137º30'W transect stations will be spaced at 74 km intervals."
        },
        {
            "spans": [
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            "content": "4"
        },
        {
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            ],
            "content": "Expendable bathythermographs (XBT) will be dropped at each station for a comparative study of STD-XBT temperature depth traces. Arrangements will be made with the Ship-of-Opportunity Program of the NMFS Pacific Environmental Group at Tiburon, California for extended coverage on the mainland to Honolulu tracks and, if possible, with NORPAX at the Scripps Institution of Oceanography for extended coverage on their transPacific XBT runs."
        },
        {
            "spans": [
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            ],
            "content": "Biological Technician R. Dotson is making all arrangements for acquiring and assembling fishing gear and for installation of fishing booms on the Cromwell."
        },
        {
            "spans": [
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                    "offset": 10592,
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            ],
            "content": "NMFS-AFRF Continue Cooperative Albacore Research Studies"
        },
        {
            "spans": [
                {
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                    "length": 985
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            ],
            "boundingRegions": [
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            ],
            "content": "Dr. R. M. Laurs, Oceanographer in charge of the Albacore Fisheries program, reports that during the 1975 albacore season, the American Fishermen's Research Foundation (AFRF) will charter seven fishing vessels in the cooper- ative NMFS/AFRF exploratory fishing and research program. Four of the vessels are slated to leave San Diego on or about June 1 to work in the early-season offshore fishery. Two of these four vessels will carry NMFS observers. In addition to the exploratory fishing these vessels will tag all albacore in prime condition for a study of migration patterns, keep detailed logs on fish catches, fish measurements, and sea conditions and make two expendable bathythermograph casts per day. Daily radio reports will be made to the AFRF radio station, WHG, or WWD, the Commerce-licensed radio station at the Scripps Institution of Oceanography. Radio communi- cations will also be maintained with the NOAA research vessel Townsend Cromwell for exchange of information."
        },
        {
            "spans": [
                {
                    "offset": 11635,
                    "length": 282
                }
            ],
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                }
            ],
            "content": "In addition to the offshore studies, three charter fishing vessels will conduct albacore scouting and research activities in nearshore waters during the 1975 albacore fishing season. The purposes of the study are 1) to locate commercial concentrations of fish for the fishing fleet;"
        },
        {
            "spans": [
                {
                    "offset": 11918,
                    "length": 73
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                }
            ],
            "content": "2) to conduct tagging operations for the study of albacore movements; and"
        },
        {
            "spans": [
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                    "offset": 11992,
                    "length": 193
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            ],
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            ],
            "content": "3) to make oceanographic observations for evaluation of the influence of the physical marine environment upon the relative abundance of albacore. Two of three vessels will carry NMFS observers."
        },
        {
            "spans": [
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                    "offset": 12186,
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            ],
            "content": "COASTAL FISH COMMUNITIES INVESTIGATIONS"
        },
        {
            "spans": [
                {
                    "offset": 12226,
                    "length": 43
                }
            ],
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            ],
            "content": "Food Available to Nearshore Fishes Assessed"
        },
        {
            "spans": [
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            ],
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                }
            ],
            "content": "At the Tiburon Marine Laboratory, Dr. Edmund Hobson, Project Leader, and Fishery Biologist Tony Chess of the nearshore fish communities project, this month completed their regular quarterly sampling of the biota at six representative nearshore habitats: 1) giant kelp bed, 2) rocks overgrown"
        },
        {
            "spans": [
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                    "offset": 12562,
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            ],
            "content": "5"
        },
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            ],
            "content": "with low brown algae, 3) rocks overgrown with low red algae ( in surge zone) , 4) rocks overgrown with coralline algae, 5) sand overgrown with low brown algae (anchored on worm tubes), and 6) open sand. Assessments are based on visual counts along established transect lines and samples made with dredge, air-lift, nets and spears."
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            "content": "Resident fishes, with emphasis on recreational species, are among the organisms sampled in each habitat. Study of the gut contents of these fishes demonstrates which of the organisms present in each habitat are in fact consumed by the fishes."
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            "content": "COASTAL FISHERIES INVESTIGATIONS"
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            "content": "Demand Grows for Pelagic Red Crab to Color Flesh of Pen-reared Salmon"
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            ],
            "content": "The pelagic red crab (Pleuroncodes planipes) has proved to be a valuable feed supplement for cultured salmon. Pen-rearing of salmon is growing rapidly as a commercial aquaculture venture in the Pacific Northwest. The carotenid pigments found in red crabs contribute heavily to the coloration of salmon flesh which would otherwise remain pale when fed only regular fish food."
        },
        {
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            ],
            "content": "Fishery Biologist Susumu Kato reports that the vessel Lady Olga left port late this month on another trip to catch red crabs in international waters off southern Baja, California. The entire catch has been sold in advance to two salmon rearers. Two more trips are contemplated in May and June to fulfill current demand for the crabs. NMFS has been instrumental in getting this fishery started."
        },
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            "content": "Tagged Silver Salmon Recovered"
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            ],
            "content": "The Salmon Rearing and Release Task is a cooperative program involving the Tiburon Laboratory, Sea Grant, California Department of Fish and Game, and the Tyee Club, a sportfishermen's organization. The objective is to rear salmon in salt water pens for release into San Francisco Bay to supplement the recreational fishery catch. Task Leader Susumu Kato and Lloyd Richards, Biological Technician, report that the first year's rearing phase ended on November 6, 1974, when about 4,000 200 gm fish were released. All fish were marked with a coded wire tag in the nose and a clipped adipose fin. In addition, about 600 fish were tagged with an external tag (Floy anchor tag. )"
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            "content": "6"
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            ],
            "content": "On March 30, one of our externally tagged silver salmon was recaptured by an angler at the Berkeley Marina - almost directly across the Bay from where it was released. During its 5-1/2 months at liberty the tagged salmon had grown 5-1/2 inches in length and about a pound and a half in weight - a remarkable growth considering growth is usually slower in salmon during winter."
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            ],
            "content": "The angler who caught the tagged fish reported having caught a smaller salmon in February and possibly a larger individual which broke the line in March. Recovery of the externally tagged salmon lends further credence to the reported catch of the two small salmon at the Berkeley Marina in December."
        },
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            ],
            "content": "Feed conversion studies are continuing with four tanks of silver salmon. Initial attempts to convert directly from Oregon Moist Pellets (OMP) to dry pellets were not successful as the fish reduced their feed intake markedly."
        },
        {
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            ],
            "content": "This month several combinations of OMP and dry pellets were tried to induce greater consumption. In addition, the dry pellets were moistened prior to feeding. Results indicate that texture rather than differences in taste or smell is the principal factor contributing to differences in feed uptake."
        },
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            "content": "Anglers' Guide to the United States Pacific Coast"
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            ],
            "content": "This month the Anglers' Guide, co-authored by James Squire, Fishery Biologist at La Jolla and Susan Smith, Publications Specialist at Tiburon, was submitted to the Center Director for approval. The Guide described marine game fish, fishing grounds and angler facilities along the west coast of the United States from California to Alaska, and around the tropical islands of Hawaii, American Samoa, and Guam."
        },
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            "content": "The fishing chart information was sent to NOAA's Visual Services Branch in Rockville, Maryland, so that cartographers can begin the task of adding information to the 40 base charts. Miss Smith also prepared a large lay- out form (bluefin flat) and submitted it to G.P.O. in San Francisco for printing. These forms will eventually be used for galley paste-up of the book."
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            "content": "7"
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            "content": "FISH ENVIRONMENTAL INVESTIGATIONS"
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            "content": "Low Oxygen Levels Studied as Possible Barriers to Tuna Movement"
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            "content": "Rates of success of purse seining have been related to the characteristics of the thermocline. Where the thermocline is shallow and dramatic, purse seining is generally more effective. Low temperatures and oxygen levels and high turbidity associated with the thermocline have been suggested as acting as effective barriers to escape through the unpursed net. Mr. Randolph K. C. Chang and Dr. Andrew E. Dizon have initiated experiments designed to determine how effective temperature, oxygen, salinity, and turbidity discontinuities are to voluntary movement of tuna."
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            "content": "To date they have completed the low oxygen study. To do this a small oval tank (6' x 8' x 2' deep) was attached to a 24' diameter x 4' deep holding tank. A small hatch (2' x 2') allowed movement between the residence tank and the treatment tank. A pair of kawakawa were trained to swim into the small tank for food rewards and the time spent in the small tank was continously recorded. The fish tested together for two (control treatment and test treatment) 20 min periods every other day. Control treatment oxygen levels were greater than 5.5 ppm and test treatment levels were less than 2.1 ppm. The fish were fed at 20 sec intervals while in the test tank."
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            "content": "The fish spent less time in the test tank at low oxygen levels than at high. At low oxygen levels, swimming speed was slower and feeding was less aggre- ssive. Also, some stress was exhibited at low levels by a darker coloration and a display of ventral spots. Behavior at high oxygen levels in the test tank was indistinguishable from that in the residence tank. During the 13 days of testing, the fish entered the test tank 516 times during the 20 min low oxygen treatments and 479 times during the control treatments. However, the fish spent a significantly greater amount of time in the test tank at high oxygen levels than at low (53% vs. 34%). Maximum time spent feeding in the test tank ranged from 0.5 to 2.0 min (0.9 min median) at low levels and from 0.8 to 3.3 min (2.0 min median) at high levels."
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            "content": "Although the fish will tolerate a median of only 0.9 min exposure to oxygen levels less than 2.1 ppm, this would seem to be ample time for a fish to escape from the deepest seine. Skipjack tuna have been demonstrated to swim at speeds from a minimum of about 0.9 length/sec to 20 lengths/sec for short bursts. Depending upon motivation and metabolic reserves, then, a 50 cm tuna could swim from 24 to 540 m in an 0.9 min period."
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            "content": "8"
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            "content": "Skipjack Tuna Swimming Behavior Unaffected by Salinity Gradients in Behavioral Thermoregulation Tank"
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            "content": "The Honolulu Laboratory's Experimental Ecology of Tunas group, under the leadership of Dr. Dizon, has as its long-range goal the generation of a predictive model of tuna distribution. Input to the model includes the functional relationships between swimming activity (speed and turning tendency) and environmental parameters (temperature, salinity, oxygen, food particles, and odors, etc. ). The group has observed the effects of temperature, salinity, and food particle gradients on swimming behavior of the three species of tunas held at Kewalo Basin. The work has been accomplished in the partially operational behavioral thermoregulation tank, which is designed primarily to measure the temperature preference of free- swimming tunas."
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            "content": "Two studies are in progress in the tank. 1) Skipjack tuna are being tested with salinity gradients of about 0.075 ppt/min. At swimming speeds of 1.5 lengths/sec for a 45 cm fish, this salinity gradient is equivalent to 0.002 ppt/m horizontal gradient. Paired fish samples are tested for a period of 3 days. For experimental fish the salinity is reduced with fresh water starting at noon each day. Fresh water is allowed to enter the tank for 1 hour; recovery of normal salinity takes about 5 hours. For control fish the procedure is the same except that salt water is used instead of fresh. Eight skipjack tuna have been tested to date and preliminary results in- dicate no response to the generated salinity gradients. 2) In a joint study with Dr. John Bardach (Hawaii Institute of Marine Biology), the effect of food odors on the swimming behavior of tunas is also being determined. Most tuna tested showed a small but significant change in swimming behavior on introduction of the odorants. Current tests should show whether feeding will make the responses more marked."
        },
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            ],
            "content": "* *"
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            "content": "FEI Leader Dr. Richard A. Barkley reported routine work on manuscripts, including manuscript review. He supplied ORSOM, Noumea, with a printout of data from his Oceanographic Atlas of the Pacific showing averaged temperatures, salinities, and density in the upper 500 m for use in their work on surface currents in the southwestern Pacific."
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            "content": "MARINE MAMMALS"
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            "content": "Operations Research Analyst Joins Porpoise/Tuna Program at La Jolla Laboratory"
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            "content": "Dr. David Au, Operations Research Analyst, entered on duty with the Porpoise/Tuna Program at the La Jolla Laboratory April 28. Dr. Au, who"
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            "content": "9"
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            ],
            "content": "received his Ph.D. from Oregon State University in 1971, transferred to the Southwest Fisheries Center from the NMFS Northeast Fisheries Center in Woods Hole, Massachusetts where he was in charge of their program on larval herring ecology."
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            "content": "Dr. Au will work with Dr. William Lenarz, Leader of the Porpoise/Tuna Program in evaluating the entire fishing process in terms of effective effort on porpoise and tuna stocks. His first specific assignment is to analyze and evaluate effects of gear modification in reducing incidental mortality of porpoise taken in the eastern tropical Pacific yellowfin tuna fishery."
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            "content": "Account of NMFS Porpoise Research Presented to Members of American Cetacean Society"
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            "content": "The first of a series of meetings intended to acquaint and inform inter- ested individuals and groups on research conducted by the staff of the Porpoise/Tuna Program at the La Jolla Laboratory, as mandated by the provisions of the Marine Mammal Protection Act of 1972, was held in the auditorium of the Southwest Fisheries Center on April 11."
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            "content": "Chaired by SWFC Deputy Director Robert F. Scott, presentations of on- going work in progress were made to 18 members of the American Cetacean Society. Dr. William Fox, leader of the SAFE Investigations, provided general background on the aims and objectives of the program, Dr. William Perrin talked about his research on the life histories of the porpoise species involved in the fishery, and Dr. Tim Smith talked about how popu- lation estimates of porpoise were derived."
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            "content": "All NMFS Porpoise Observer Trips Completed During 1975 Open Tuna Fishing Season"
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            "content": "An important component of the NMFS research program on porpoise/tuna interaction in the eastern tropical Pacific is the data collected by NMFS observers who accompany U. S. tuna seiners to collect vital statistics on porpoises killed incidentally in tuna seining operations. As of this writing, 16 observer trips were completed before the closure of the Commission Yellowfin Regulatory Area (CYRA) to unrestricted fishing on March 13; four more observers have returned since that time. A total of 31 observers have been placed aboard U. S. tuna seiners this year."
        },
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            ],
            "content": "Ashore, the porpoise/tuna and data management staff at the La Jolla Laboratory devoted considerable effort to editing and processing set logs from the first 16 observations. According to Dr. William Lenarz, in charge of the Porpoise/Tuna Program, the work has not been completed. This was the first real test of the new data management system and the system performed extremely well."
        },
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            "content": "10"
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            ],
            "content": "Small Cetacean Research Proposal Prepared for FAO"
        },
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                    "length": 519
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            ],
            "content": "Dr. W. Perrin, Fishery Biologist at the La Jolla Laboratory, was at the Smithsonian Institution, Washington, D. C., April 1-8, to partici- pate in the preparation of a FAO Advisory Committee on Marine Resources Research (ACMRR) proposal for research on small cetaceans. The proposal was researched and written by a five man subcommittee of the ACMRR Advisory Group on Small Cetaceans. The other members of the subcommittee are Drs. S. Holt, FAO; E. D. Mitchell, Canada; T. Kasuya, Japan; and R. L. Brownell of the U. S."
        },
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            ],
            "content": "Testing of \"Porpoise Aprons\" Continues"
        },
        {
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                    "offset": 24959,
                    "length": 826
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            ],
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            ],
            "content": "Designed by Mr. R. McNeely and his staff of gear experts at the NMFS Northwest Fisheries Center in Seattle, Washington, the porpoise apron is a long, tapered strip of webbing that is fitted into tuna purse seines between the corkline and the Medina panel and is inserted in the backdown area. Conceptually, the tapered webbing forms a ramp over which the por- poises can be backed out without risk of submerging the corkline too deeply. Thus the fishermen can free the captured porpoise while retaining the fish in the seine. In addition to the seven aprons installed earlier in vessels whose captains had volunteered to test the new gear, two addi- tional aprons have been put in nets under the supervision of Mr. Jerry Jurkovich of the Northwest Fisheries Center. Two more aprons have been fabricated and await installation."
        },
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            ],
            "content": "On return from their current fishing trips, the fishing captains who have had porpoise aprons installed in their nets will provide detailed infor- mation to NMFS for evaluation of apron performance in reducing porpoise mortality. Also, porpoise observers on board two of the vessels with the porpoise aprons will collect additional information on the performance of the aprons."
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            ],
            "content": "PHYSIOLOGY INVESTIGATIONS"
        },
        {
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            ],
            "content": "Research on Effects of Aromatic Hydrocarbons on Marine Organisms Nears Completion"
        },
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            ],
            "content": "During April, investigators in the Physiology program at the Tiburon Laboratory concentrated their efforts on completing manuscripts and re- maining experiments on the effects of aromatic hydrocarbons on marine organisms."
        },
        {
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            "content": "11"
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            ],
            "content": "Fishery Biologist Sid Korn, Biological Technician Nina Hirsch, and Jeannette Struhsaker, Chief, Physiology Investigations, report that two manuscripts describing experiments on the uptake, distribution and depuration of C14 labelled benzene in three species of fish (Morone saxitilis, Engraulis mordax, and Clupea harengus pallasi) were completed and are currently being reviewed. Work continued on another paper by Research Chemist Pete Benville and Fishery Biologist Sid Korn on the acute toxicity of six aromatic crude oil components to striped bass and bay shrimp. The chronic effects of xylene on Pacific herring embryos and larvae are described in a manuscript completed this month by authors Maxwell Eldridge, Jeannette Struhsaker and Tina Echeverria."
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            ],
            "content": "Continous flow bioassays exposing adult herring to benzene were begun by Research Chemist Pete Benville. The toxicity level for 24 hours was 1-3 ppm. The 96 hour concentration is not yet determined. These preliminary results show continous flow exposure to benzene to be 3 to 4 times more toxic than static exposures."
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            ],
            "content": "In recent years, the marine rotifer, Brachionus plicatilis, has been used as a food organism in the culture of fish larvae. In experiments studying the bioenergetics of fish larvae exposed to aromatic hydrocarbons, investi- gators monitored the uptake and accumulation of benzene at slower rates, but to much higher levels and no depuration occurred during sampling periods up to eight days. Biological Technician Tina Echeverria began the fifth in a series of experiments to determine the level of maximum benzene accumulation. Rotifers are being exposed to daily doses of 100 ppb and 1 ppm concentration of C 4 labelled benzene. After the asymptotic benzene concentration is determined the depuration of residual benzene in the rotifers will be monitored."
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            "content": "STOCK ASSESSMENT AND FISHERY EVALUATION INVESTIGATIONS"
        },
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            "content": "Oceanographic Data from Tuna Vessels to be Edited for Computerized Data Base"
        },
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            ],
            "content": "Mr. Ken Brennecke, Computer Technician at the La Jolla Laboratory, began working on a computer program to edit the existing data base containing expendable bathythermograph (XBT) observations and weather observations from tuna vessels. The computer program will automatically eliminate duplicate and spurious observations from the data, thus reducing the amount of labor time required in preparation of data analysis."
        },
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            ],
            "content": "Arrangements were also made for acquiring from NORPAX, magnetic tapes containing XBT data for the entire Pacific which have been collected"
        },
        {
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            "content": "12"
        },
        {
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            ],
            "content": "by the U. S. Navy's Fleet Numerical Weather Central, Monterey, California, since the early 1960's. The XBT profiles from this source will supplement those collected by tuna vessels since 1971, and will help to \"fill in the gaps\" where sparsity of data has proved a hindrance to reliable ocean thermal structure analysis. The summarization of all existing XBT obser- vations by 1° squares and by month will begin soon. Further examination of the relationship between fishing success and ocean thermal structure will be facilitated by this new data."
        },
        {
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            ],
            "content": "Tuna Vessels Weather and XBT Reporting Rate is Up"
        },
        {
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                }
            ],
            "content": "During April a total of 17 U. S. tuna vessels fishing in the eastern tropical Pacific participated in the radio weather reporting program of the Real-Time Fishing Systems Task at the La Jolla Laboratory. Substantial quantities of both weather and XBT observations were recorded."
        },
        {
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            "content": "April Reporting Rates"
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            "content": "Weather Observations"
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            "content": "XBT Observations"
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            "content": "Total"
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            "content": "1974"
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            "content": "297"
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            "content": "42"
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            "content": "81"
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            "content": "% Increase"
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            "content": "+9%"
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            "content": "+17%"
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            "content": "Year-to-Date"
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            "content": "Weather Observations"
        },
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            "content": "XBT Observations"
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            "content": "Total"
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            "content": "1974"
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            "content": "937"
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            "content": "1,091"
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            "content": "1975"
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            "content": "217"
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            "content": "1,264"
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            "content": "% Increase"
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            "content": "+11%"
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            "content": "+29%"
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            "content": "+14%"
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            ],
            "content": "Data Base System for Tuna Data Designed"
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        {
            "spans": [
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                    "length": 605
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            ],
            "content": "Mathematician Al Coan and Computer Technician Ken Brennecke are continuing work on designing tuna length-frequency and catch-effort data bases for the Atlantic Ocean. Flow diagrams for processing, editing and entering data have been completed and total catches by year, area, and country have been placed on cards. Length frequencies from the U. S. purse seine catch and French-Ivory Coast-Senegalese purse seine catch have also been placed on cards. During editing of these data, prototype data bases using edited portions of these data are being used to test the efficiency and design of the data bases."
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            "content": "13"
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            ],
            "content": "Mr. Ted Murphy, a recent graduate of Colorado State University, has joined the staff of the Stock Assessment Task at the La Jolla Laboratory as a Fishery Biologist. At Colorado State University, Mr. Murphy worked on analytical methods for identifying subpopulations of cutthroat trout in the Yellowstone National Park. In his new assign- ment at the La Jolla Laboratory he will be involved in stock assessment of Atlantic tunas."
        },
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            "content": "STOCK AND RECRUITMENT INVESTIGATIONS"
        },
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            ],
            "content": "Project Begun to Evaluate Starvation as Cause of Mortality in Jack Mackerel Larva"
        },
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            ],
            "content": "Fishery Biologist Gail Theilacker of the La Jolla Laboratory began a project this month to evaluate starvation as a cause of mortality in jack mackerel larvae. Jack mackerel are of major importance in the California wetfish fishery. The major objective of Ms. Theilacker's study is to establish histological criteria for estimating the extent of starvation in sea-caught jack mackerel larvae. Once these criteria are established, sea-caught larvae will be examined to determine the incidence of starvation. This work should greatly improve our understanding of the causes of larval mortality and therefore the relationships between stock size and recruitment. The first step in her work will be to establish starvation criteria through laboratory experimentation. She plans to collect jack mackerel eggs at sea and rear the larvae in the laboratory under controlled conditions. Ms . Theilacker will employ histological techniques to determine normal cellular growth in larvae at various stages of development and compare these samples to those taken from larvae that have been starved."
        },
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            ],
            "content": "Experiments to Establish Suitability of Dinoflagellate for First-Feeding Anchovy Larvae Initiated"
        },
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            ],
            "content": "Experiments have been initiated this month by Dr. Edward Scura, Physiologist at the La Jolla Laboratory, to establish the suitability of the dinoflagel- late, Gonyaulax polyedra, as a food for first-feeding anchovy larvae. Data collected by Dr. Lasker during the past several months indicates that there was a rich layer of G. polyedra extending along the California coast from Point Conception to San Diego during the time of heavy anchovy spawning. Proper size for first-feeding anchovy larvae but little is known about the suitability of this phytoplankton as a larval food. Preliminary experiments indicate that although anchovy larvae readily feed on this organism, growth"
        },
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            "content": "14"
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            ],
            "content": "and survival is reduced when compared to larvae fed the dinoflagellate, Gymnodinium splendens. G. splendens is routinely used at the La Jolla Laboratory as a food for first-feeding larvae and it was the predominant organism in the chlorophyll maximum along the coast of the Los Angeles Bight during the spring of 1974."
        },
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            "content": "Plankton Microstructure in Coastal Waters off California to be Investigated"
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            ],
            "content": "In April, Dr. Robert Owen, Oceanographer at the La Jolla Laboratory, began organizing an investigation of plankton microstructure in coastal waters off California. This work is essential for an understanding of the sur- vival of anchovy larvae and other larval fish. Food studies in the sea and in the laboratory indicate that the average food density in this area will not support life of larval fishes. Consequently, the survival of larval fishes depend on the patchiness of the food distribution, that is, on plankton microstructure."
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            "content": "Dr. Owen has thus far chaired two meetings dealing with technical and scientific aspects of studying the microstructure of the food for larval fishes. The objective of the meetings was to initiate planning of a multiple-ship effort to measure small-scale plankton distributions and mechanisms of phytoplankton and zooplankton patchiness, co-patchiness of species, and association of fish larvae with higher density zones of food- sized particles."
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            ],
            "content": "In connection with this proposed study, parts for a water sampler system for sampling at 20 cm intervals vertically were obtained from Joris Gieskes of Scripps Institution of Oceanography. A new frame is being designed so that close-spaced samples can be obtained from mid-water depths, expec- ially in the vicinity of the chlorophyll maximum zone."
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            "content": "Dr. John Hunter, Fishery Biologist and Ms. Carol Sanchez, Biological Technician, continued their work on the feeding ecology of Pacific mackerel. As a first step in these studies they are examining the effect of prey size on feeding success of mackerel. They also began work on rearing Pacific mackerel at 16℃ to complete a study of the effect of temperature on growth of mackerel."
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            "content": "Dr. Hunter completed a manuscript entitled, \"Behavior and survival of northern anchovy (Engraulis mordax) larvae\". This paper is a contribution to a symposium on fishery science held in Ensenda, Mexico in February 1975. The paper discusses how the behavior of anchovy is affected by biotic and abiotic factors and how these interrelationships are related to growth and survival."
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            "content": "15"
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            "content": "NSF Researcher at SWFC Studies Behavior of Larval Fish and Their Prey Utilizing Schlieren Optical System"
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            "content": "Through a grant from the Oceanography Section of the National Science Foundation (NSF) to the Regents of the University of California, Dr. John H. Taylor, principal investigator under the NSF grant, with the cooperation of Drs. Reuben Lasker and John Hunter of the La Jolla Laboratory, has begun work on a large-aperture Schlieren optical system that will permit obser- vation and recording of behavioral patterns of transparent marine organisms that are normally difficult to see or to photograph in sea water. The Schlieren system will be used in studies of the behavior of larval fish and their prey at the Southwest Fisheries Center."
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            "content": "The optical system will be based on a pair of 12 inch concave mirrors that allow a sample area of more than 750 cm2 to be studied. By the use of this large field it will be possible to see and record the movements of larval fish and their prey over relatively long action paths and in a relatively unconfined space so that behavior is not significantly modified by the apparatus. Organisms in the range from 1 centimeter down to 50 microns. or less should be resolved by the system."
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            "content": "Preliminary studies made at the Southwest Fisheries Center suggest that the Schlieren system may be modified to give images that may be color-coded according to the degree of refraction produced by the organisms, and the device may be modified to give three-dimensional photographs as well. Further, it will be possible to visualize or photograph the occurrence of temperature and salinity gradients and the organism's response to them."
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            "content": "NOAA Research Associate Reports Advances in Work on the Biology of Young Stages of Squid"
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            "content": "Dr. Ann Hurley, NOAA Research Associate at the La Jolla Laboratory, reports she has now maintained the commercially important squid, Loligo opalescens, in the laboratory from the time of hatching to a maximum age of 100 days."
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            ],
            "content": "During this time the squid were fed primarily upon brine shrimp nauplii and adult brine shrimp. This diet was supplemented with larval anchovies and larval mackerel. Contrary to previous reports for other species, young squid readily attached a wide size range of prey. Newly hatched Loligo attached brine shrimp nauplii (~0.7 mm), adult Artemia (~8.0 mm) , and larval fish (~5.0 mm). Feeding rates were calculated for squid in terms of percent body weight eaten per day."
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            "content": "16"
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            "content": "Average results are:"
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            "content": "Week"
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            "content": "% Body weight/day"
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            "content": "50"
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            "content": "115"
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            "content": "9"
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            "content": "72"
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            ],
            "content": "Examples of feeding rates are: newly hatched squid: 108 Artemia nauplii/ squid/day; 4 week old squid: 43 anchovy larvae/squid/day; 4 week old squid: 302 Artemia nauplii/squid/day."
        },
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                }
            ],
            "content": "Growth in the laboratory was very similar to growth previously published for the adults. Growth can be described by the equation:"
        },
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            ],
            "content": "Mantle length = 1.98 + 0.081 age (in days)"
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            ],
            "content": "The length to weight relationship takes the following form:"
        },
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            ],
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            ],
            "content": "Log weight = - 1.22 + 2.37 log length"
        },
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            ],
            "content": "Respiration data was obtained for squid at different ages and temperatures. Average values are:"
        },
        {
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                    "length": 3
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            ],
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            ],
            "content": "Age"
        },
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            "content": "Temperature"
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            ],
            "content": "m102/mg dry wt./hour"
        },
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            "content": "Newly hatched squid"
        },
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            "content": "10℃"
        },
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            "content": "1.5"
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            "content": "Newly hatched squid"
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            "content": "15°C"
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            "content": "2.5"
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            "content": "Newly hatched squid"
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            "content": "20°C"
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            "content": "3.5"
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            "content": "21 day old squid"
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            ],
            "content": "15℃"
        },
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            "content": "3.5"
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            "content": "58 day old squid"
        },
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            "content": "15°C"
        },
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            "content": "3.7"
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            ],
            "content": "Respiration and growth data and intended to be used to evaluate the overall feeding potential of squid and their position impact as predators on fish larvae."
        },
        {
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                    "length": 2
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            "content": "17"
        },
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            ],
            "content": "CalCOFI Plankton Collection to be Analyzed in Study of Invertebrate Predators of Larval Anchovy"
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            "content": "A meeting was held at the La Jolla Laboratory this month to consider experimental design for the study of invertebrate predators of larval anchovy by analysis of CalCOFI plankton collections. Attending the meeting were Drs. Ahlstrom, Alvariño, Hunter, Stauffer and Mr. Zweifel. The principal conclusions of the meeting were: 1) to establish species codes for invertebrate predators, establish a data format and begin processing existing data on distribution and abundance of predators; 2) develop a sampling design which uses larval and egg density to select samples for analysis; 3) consider initially for analysis cruises occurring between January through July for the years 1954, 1956, and 1958. Mr. Zweifel agreed to develop the experimental design once the existing data is on cards."
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            ],
            "content": "In response to these suggestions, Dr. Alvariño this month prepared a species code for species of Chaetognatha, Chondrophorae, Siphonophorae, Medusae and Ctenophora. The codes include all species in each of these groups that occur in the upper 100 m in the California Current area and their life stages. A data format has been developed which will include data from analysis of gut contents of larval predators as well as the abundance and life stage of each predator. Dr. Alvariño has begun to transcribe the existing data into this form for automatic data processing."
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            ],
            "content": "Dr. Alvariño has also prepared a manuscript entitled, \"Bathymetric distribution of Pleuroncodes planipes (Crusteacean, Galatheidae). A new fisheries off California.\" The information in this manuscript is based on 1969 stratified plankton collections taken off California."
        },
        {
            "spans": [
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            "content": "Fourth Fish Egg and Larval Identification in Course Completed"
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            ],
            "content": "Between April 1 to 18, an intensive course dealing with identification of fish eggs and larvae was given at the Southwest Fisheries Center under the direction of Dr. E. H. Ahlstrom, Senior Scientist, but also involving most persons working on larval fishes at the La Jolla Laboratory. This was the largest group who have taken the larval fish identification course - 21 persons, 13 from foreign countries. This is the fourth time that Dr. Ahlstrom has presented this course. Although the participants had mixed backgrounds and experience in ichthyology and ichthyoplankton they all shared one characteristic, according to Dr. Ahlstrom - they came to learn and all participants worked diligently."
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            "content": "18"
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            ],
            "content": "During the course a total of 204 life history series was studied, belong- ing to 92 fish families. About 10% of the series are based on Atlantic material, 90% on Pacific. However, of the 92 families studied 87 occurred in both the Atlantic and Pacific, hence there is considerable transference of background as between oceans."
        },
        {
            "spans": [
                {
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            ],
            "content": "The contribution on carangid larvae, presented by Dr. Ahlstrom and Ms. Barbara Sumida at the Ensenada Symposium, has been reworked, edited, and is now in final form for publishing."
        },
        {
            "spans": [
                {
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            ],
            "content": "The contribution titled, \"Report on neuston (surface) collections made on an extended CalCOFI cruise during May 1972\", by Dr. Ahlstrom and Ms. Elizabeth Stevens, is being revised before submission as a contribution to the CalCOFI Report series."
        },
        {
            "spans": [
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            ],
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            ],
            "content": "Dr. G. Moser, Fishery Biologist, gave the lecture in the ichthyoplankton course dealing with scorpaenids and assisted in the laboratory work. He is editing his handbook dealing with life history series of scorpaenid fishes."
        },
        {
            "spans": [
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            ],
            "content": "Experiments on Maturation and Spawning of Striped Bass Approaching Completion"
        },
        {
            "spans": [
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            ],
            "content": "Dr. Reuben Lasker and Mr. K. Lal of the California Department of Fish and Game report that during April, four hormone-injected female striped bass held in sea water attained ripe condition and were spawned. Eggs and milt from a ripe male were stripped into fresh water, but very few larvae hatched from this fertilization."
        },
        {
            "spans": [
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            ],
            "content": "Two females developed eggs as large as 0.6 and 0.7 mm diameter in February 1975 after being kept under constant spring-like conditions since August 1974. To enhance ripening, these fish were injected with salmon pituitary. In March, both fish had eggs of 0.8 mm diameter and were injected with human chorionic gonadotropin (HCG). Biopsy after 2 weeks showed the presence of green ova (typical of the ripe condition) up to 1.2 mm diameter and the fish were reinjected with HCG for spawning. Unlike the previous cases, these two females spawned after a series of three injections over a 6 week period."
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            "content": "19"
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            ],
            "content": "The remaining two females were exposed to a winter-spring cycle from January 1, 1975 and were spawned after 108 days, requiring only two HCG injections. This showed that striped bass females can complete development from immature oocytes (0.3 mm or less) to ripe eggs (1.1 mm or less) in less than 4 months."
        },
        {
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            ],
            "content": "Further efforts are being made to determine whether salmon pituitary will give more consistent results than HCG for maturation of gonads."
        },
        {
            "spans": [
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            "content": "Drs. Reuben Lasker and Paul Smith of the La Jolla Laboratory met April 29-30 with Mr. Ron Keir of FAO, Mexico City and Mr. David Lluch of In- stitute Nacional Pesquero, Mexico City to discuss collaboration in future California Cooperative Oceanic Fisheries Investigations (CalCOFI) surveys. A meeting of CalCOFI scientists will take place on June 26 in Mexico City to elaborate on cooperative studies of mutual fishery resources of the U. S. and Mexico."
        },
        {
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            "content": "Sampling Properties of MARMAP Bongo Nets and CalCOFI Standard Net to be Evaluated"
        },
        {
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            ],
            "content": "Dr. Reuben Lasker reports that preparations were made in April to evaluate the sampling properties of the new MARMAP Bongo nets and the CalCOFI stand- ard net. A committee convened by Dr. Lasker and consisting of Drs. Ed Brinton, Abe Fleminger, and John McGowan of the Scripps Institution of Oceanography and Dr. Paul Smith met in April to consider the preliminary results from a 90 sample suite of observations taken with the two nets. On the average, the smaller bongo sampler collected 50% more zooplankton than the CalCOFI net with which it was compared. A 20 sample series was selected to begin to interpret the species composition of the additional biomass collected by the improved sampler. These data are presented in Administra- tive Report no. LJ-75-57, \"Comparison of the collecting properties of the MARMAP open bongo and the CalCOFI standard net with similar mesh design on three stations, Winter 1975, in the California Current - A preliminary report.\""
        },
        {
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            ],
            "content": "With the sized-larva data file nearing completion, an ad hoc committee of Dr. Paul Smith, Mr. Larry Eber and Dr. Robert Owen of the La Jolla Laboratory met to assemble preliminary specifications for the oceanographic data file with which larval development and mortality rates maybe prepared. To accommodate a wider range of users, this committee presented the results of their deliverations to scientists of the coastal division and to the personnel of the SWFC computer service. The basic data file is now being"
        },
        {
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            "content": "20"
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            ],
            "content": "created and suggested outputs are being evaluated. The primary outputs will be time series of sized larvae region and by a group of eight sec- tions, five normal to, and three parallel to the coast. Inquiries by those interested may be directed to Roger Hewitt, Larry Eber, Bob Owen or Paul Smith."
        },
        {
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            ],
            "content": "Dr. Smith consulted with Dr. Frank Augustine of the Energy and Resources Division of the Aerospace Corporation on April 28 to assist in unifying the ichthyoplankton sampling criteria of the NMFS sampling program (Bongo nets) and the sampling criteria of the Department of the Interior, Bureau of Land Management, Marine Minerals Division for the Outer Continental Shelf environmental studies program. This program is involved in com- piling baseline data and designing a monitoring system for critical en- vironmental parameters to ensure that oil and gas exploration and develop- ment on the Outer Continental Shelf do not cause quality deterioration of the environment."
        },
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            "content": "* *"
        },
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            ],
            "content": "Dr. Paul Smith, Fishery Biologist and Ms. Sharon Duke, Statistical Assistant, at the La Jolla Laboratory, submitted a report on the inshore- offshore distribution of anchovy eggs and larvae to the University-State- Federal Anchovy Working Group. Administrative Report no. LJ-75-58, \"Nearshore distribution of northern anchovy eggs and larvae (Engraulis mordax)\" summarizes the incidence of eggs and larvae in 5 mile bands near the coast and offshore islands, in 10 mile bands in the offshore area and the seaward incidence of eggs and larvae. The report was prepared from data collected on the Pt. Arguello area environmental impact analysis prepared for the Atomic Energy Commission by Senior Scientist Elbert Ahlstrom in July 1965."
        },
        {
            "spans": [
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                }
            ],
            "content": "Scientists from NMFS, California Department of Fish and Game and the Scripps Institution of Oceanography participating in the Anchovy Workshop are assembling and comparing all assessment methods now available for use in the management of the anchovy fisheries."
        },
        {
            "spans": [
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            ],
            "content": "Preparation of Long-Term Monthly Mean Sea Surface Temperature Charts in Process for the Pacific Ocean"
        },
        {
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            ],
            "content": "Messrs. L. Eber, Meteorologist, F. Miller, Meteorologist with the Inter- American Tropical Tuna Commission, and J. Renner, Fishery Biologist have entered into a joint effort to prepare for publication, charts of monthly mean sea surface temperature and of seasonal (month to month) changes in the North and Eastern tropical Pacific Ocean. The charts will be based on data for the 20 year period 1948-67, obtained from the Fleet Numerical Weather Central and summarized by 1º quadrangles with assistance of the Pacific Environmental Group, NMFS, Monterey. Preliminary processing of the"
        },
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            "content": "21"
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            ],
            "content": "data was completed in April 1975 and resulted in the production of digital plots and printouts, and smoother contour plots computed from harmonic coefficients fitted to the data to achieve seasonal continuity. This procedure is particularly useful for regions of sparse data dis- tribution. The computer outputs will be used as aids in making the final charts."
        },
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            ],
            "content": "Plan Submitted to IOC for Future Oceanic Surveys off Peru to Analyze Impact of \"El Nifio\""
        },
        {
            "spans": [
                {
                    "offset": 49170,
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            ],
            "content": "Dr. Paul Smith, Fishery Biologist at the La Jolla Laboratory, submitted a plan in April to the Intergovernmental Oceanographic Commission of UNESCO regarding the future conduct of oceanic surveys off Peru to analyze the impact, if any, of the \"EL Nino\" phenomenon on the growth and survival of anchoveta larvae and juveniles. This plan was originally designed in Guayaquil, Ecuador in December by a committee of Oscar Guillen of Peru, David Cushing of Great Britain, and Dr. Smith. Its implementation is intended to allow the analysis of the anchoveta popu- lation, particularly larval and juvenile survival and subsequent recruitment in the context of the fishery, primary and secondary production, and pre- dation as it is affected by the severe climatic changes associated with the \"El Niño\" phenomenon."
        },
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            "content": "Anchovy Workshop Proceedings Completed"
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            ],
            "content": "Dr. Gary Stauffer, Fishery Biologist at the La Jolla Laboratory and Mr. Alec MacCall, Associate Marine Biologist, California Department of Fish and Game, edited the proceedings of the March 19-20 CalCOFI Anchovy Workshop, compiled by Ms. L. Vlymen. The proceedings outline much of what is known about the northern anchovy and point out areas where knowledge is inadequate."
        },
        {
            "spans": [
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            ],
            "content": "A large portion of the Anchovy Workshop was devoted to discussions of various survey techniques for measuring abundance (absulute or relative). All agenda items outlined in the March monthly report of the SWFC are reviewed, except recommendations for research. This item was deferred for a second meeting scheduled for May 5 and 6 at the Southwest Fisheries Center. The purpose of the second Anchovy Workshop is to develop guidelines for research in the anchovy program and to order priorities to accomplish the objectives. Center Director Brian J. Rothschild will chair the proceedings."
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            "content": "22"
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            "content": "TUNA ASSESSMENT AND DEVELOPMENT INVESTIGATIONS"
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            "content": "Recommendations Made on Future Direction of Honolulu Laboratory Baitfish Project"
        },
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            "spans": [
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            "content": "The work and future direction of the baitfish project were discussed in two meetings of the ad hoc Baitfish Committee and in program review sessions held at the Honolulu Laboratory by the Center Director this month. Three recommendations emerged from these discussions: 1) Continue work with roll-on/roll-off transportation of baitfish but move operations to Tiburon Laboratory. Next trial shipment will be preceded by 3 months of experiments to determine causes of mortality during aging and shipment. 2) Transport, via chartered bait boat, 1,500 to 3,000 buckets of northern anchovy from California for use in fishing tests in Hawaii. 3) Supply threadfin shad from Wahiawa Reservoir for fishing tests during the 1975 skipjack tuna season. A proposal was prepared for PTDF participation in the foregoing. Plans were made to move Roger Green, Leader, Bait Fishery Development Program to Tiburon to start work on 1) above."
        },
        {
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            "content": "Continuing in the assessment of other tuna and tunalike resources as part of the Honolulu Laboratory's Tuna Monitoring and Assessment Task, Fishery Biologist Richard N. Uchida worked on a paper, \"A summary of environmental and tuna fishing information of the U.S. Trust Territory of the Pacific Islands.\" He also reviewed and worked on revisions of the paper \"The Pacific tuna pole-and-line live-bait fisheries\" which he is authoring jointly with Messrs. Howard Yoshida and Tamio Otsu. Mr. Uchida and Ms. Lucille Tsukano collaborated in updating the 1974 Hawaii Division of Fish and Game's skipjack catch reports and flagline catch reports. Ms. Tsukano rechecked and corrected all the skipjack bait reports. The decks of skipjack bait catches, skipjack catches, flagline bait catches, and flagline catches for 1974 are now complete and may be used in data processing."
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            ],
            "content": "Fishery Biologist Tom Hida assembled information dealing with albacore catches in the area of Midway for west coast albacore trolling boats that are heading there. Mr. Hida also worked on manuscript review and revision of the manuscript \"Baitfish study in Majuro, Marshall Islands\" by Hida and Uchiyama."
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            "content": "23"
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            "content": "*"
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            ],
            "content": "Fishery Biologist Jerry Wetherall has gone to the La Jolla Laboratory where he will spend about 2 months working on North Pacific albacore data."
        },
        {
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            ],
            "content": "April a Below-Average Month in Hawaii's Skipjack Tuna Fishery"
        },
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            ],
            "content": "An estimated 116.8 MT (metric tons) of skipjack tuna were landed in April in the Hawaiian fishery. This catch was 40.2 MT below the catch in April 1974 and 106 MT lower than the long-term April average (1948-74). The catch from January through April was estimated at 624.8 MT, 18 MT below last year's catch for the same period and 51.1 MT above the average for 1948-74."
        },
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            ],
            "content": "GAS employee Pulou Niuatoa recorded the lengths of 565 albacore from 12 vessels unloading at Pago Pago during the period March 22 to April 25. He collected 42 sets of catch and effort data. Data from five vessels were used to determine an average size of 92.1 cm and an albacore catch per 100 hooks of 0.91."
        },
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            "content": "PUBLIC RELATIONS - SOUTHWEST FISHERIES CENTER"
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            ],
            "content": "April 10 20 participants in the 1975 San Diego Science Fair visited the Center for a lecture and tour of the facilities. Mr. David Kramer, Fishery Biologist, was the speaker and host for the group and their adult sponsors."
        },
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            ],
            "content": "16 Dr. Brian J. Rothschild, Director, Southwest Fisheries Center, presented a lecture at the UC Irvine Campus entitled, \"Development of Fisheries Policy\". This lecture was a part of a University Extension course, \"The living marine resources of California: The management imperative\", given during the spring quarter."
        },
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            ],
            "content": "30 Dr. Paul Smith, Fishery Biologist, La Jolla Laboratory, lectured to 75 members of a biological oceanography class at San Diego Mesa College on \"Fisheries in the California Current\"."
        },
        {
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            "content": "24"
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            "content": "April 30"
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            ],
            "content": "The Honolulu Laboratory contributed an interest- ing display and movie to the Federal Day presen- tation on April 30. This was held in the Coral Ballroom of the Hilton Hawaiian Village Hotel in conjunction with the annual luncheon honoring nominees for the outstanding federal employee awards."
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            "content": "SEMINARS"
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            "content": "Honolulu Laboratory"
        },
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            ],
            "content": "April 9 Dr. Paul Struhsaker, Fishery Research Biologist, gave a seminar on fishes and crustacean resources of the tropical upper slope zone at the Honolulu Laboratory."
        },
        {
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            ],
            "content": "23 Dr. Brian J. Rothschild, SWFC Director, spoke on extended jurisdiction to Honolulu Laboratory staff members and guests."
        },
        {
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            "content": "La Jolla Laboratory"
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            "content": "April 3"
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            ],
            "content": "Professor Joseph Reid, Director, Marine Life Research Group, Scripps Institution of Oceanography presented a lecture entitled, \"Geostrophic flow at various deep pressure surfaces in the Pacific Ocean\"."
        },
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            ],
            "content": "MEETINGS AND TRAVEL (Unless otherwise mentioned in text)"
        },
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            ],
            "content": "March 21 - April 11 Dr. Ed Scura, Physiologist, La Jolla Laboratory, traveled to Woods Hole, Massachusetts to join the research vessel Atlantic II for a cruise, sponsored by the Brookhaven National Laboratory, off Long Island. Dr. Scura's participation in the cruise was in connection with the NMFS-Brookhaven contract on the investigation of the causes of larval fish mortality in the New York Bight and the Los Angeles Bight. During the cruise Dr. Scura used the plankton pump and towed a plankton net to collect fish larvae and to assess the kinds and densities of larval food particles."
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            "content": "25"
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            "content": "March 31- April 9"
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            "content": "Center Director Brian J. Rothschild traveled to Washington, D. C., Kingston, Rhode Island and Woods Hole, Massachusetts to meet with Dr. William Royce regarding extended jurisdiction and to present seminars at the University of Rhode Island and the Northeast Fisheries Center."
        },
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            "content": "April 2-4"
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            ],
            "content": "Dr. Jeannette Struhsaker, Pete Benville, and Tina Echeverria traveled to Bend, Oregon to attend the Pacific Fisheries Biologist 1975 Annual Meeting."
        },
        {
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            ],
            "content": "4-6 Dr. Tim Smith, Fishery Biologist, La Jolla Laboratory, attended the Maximum Sustainable Yield meeting sponsored by the World Wildlife Fund in Airlie, Virginia. His travel was paid by the Fund."
        },
        {
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            "content": "8 The ad hoc Baitfish Committee met to discuss the results of the most recent baitfish transport trial and to address the question, \"Where do we go from here?\""
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            ],
            "content": "10 Mr. Chaco Yamamoto, commercial fisherman from Hilo, discussed the phenomenon of burnt tuna with Messrs. Shomura and Yuen at the Honolulu Laboratory."
        },
        {
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            "content": "11-13"
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            ],
            "content": "Librarian Hazel S. Nishimura attended the annual spring conference of the Hawaii Library Association held at the Princess Kaiulani Hotel. Ms. Nishimura was elected secretary of the Special and Reference Section of HLA."
        },
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            "content": "13-15"
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            "content": "Mr. David Mackett, SWFC, traveled to Washington, D.C. to attend a meeting regarding the Bureau of Land Management proposal. He subsequently flew to San Francisco to attend a meeting on the National Fisheries Plan where the principal topics of discussion were ex- tended jurisdiciton and the NFP Issues and Plans."
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            "content": "14 Susumu Kato met with Don Whitaker, Coordinator of Development of Underutilized Fisheries Resources at the Southwest Region, Terminal Island, California."
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            "content": "15 Mr. Shomura met with members of the research staff and Mr. Lee to discuss operational policies and guidelines."
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            "content": "26"
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            "content": "18 Susumu Kato attended a meeting on the Commercial Fishing Hearing of the Senate Select Committee on Maritime Industry, presided over by State Senator Milton Marks in San Francisco, California."
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            "content": "21 Dr. Brian J. Rothschild, SWFC Director, spent the week of April 21 at the Honolulu Laboratory. The primary purpose of his visit was to review and discuss present research projects. Dr. Rothschild met with Mr. Shomura on Monday, April 21. On Tuesday he attended staff meeting at 0800, spoke at a general staff meeting at 0900, met with Mr. Lee before lunch, met with the Fish-Environment group all afternoon. On Wednesday he met with the Assessment and Development group from 0900 to 1030, presented a seminar on ex- tended jurisdiction until noon, met with the Population Dynamics group all afternoon. On Thursday he attended a meeting of the ad hoc Baitfish Committee at 1000 and met all afternoon with Mr. Shomura and Investigation Chiefs Dr. Richard Barkley and Tamio Otsu. He spent Friday morning with Mr. Shomura and departed for San Diego Friday at noon."
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            "content": "25"
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            "content": "Jeannette Struhsaker and Physiology Staff visited the Department of Fish and Game's Elk Grove Hatchery. The main purpose of the hatchery is to provide striped bass for stocking reservoirs."
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            "content": "Messrs. Wilvan Van Campen and Frank Alverson (Living Marine Resources) met with Messrs. Shomura and Iversen to discuss PIDC/PTDF matters. Messrs. Van Campen and Alverson were en route to Micronesia to meet with Trust Territory representatives regarding PTDF/PIDC."
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            "content": "Ms. Hazel Nishimura attended a luncheon meeting at Gateway House sponsored by the Pacific Islands Studies Program of the University of Hawaii for the purpose of bringing together UH-related units with different organizational objectives but a common interest in the use of published materials relating to Hawaii and the other Pacific Islands."
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            "content": "27"
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            "content": "April 30"
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            "content": "Messrs. Robert Schoning, Director, NMFS, accompan- ied by Mr. Herb Blatt, Staff Attorney for NMFS, and Mr. Ray Hubley, Chief, Marine Mammal and Endangered Species Division, and Mr. Gerald Howard, Director, NMFS, Southwest Region and Drs. Rothschild and Fox and Mr. Robert Scott from the Southwest Fisheries Center met with members of the tuna industry to discuss the porpoise/tuna problem."
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            "content": "Honolulu Laboratory"
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            "content": "April 7-8 Dr. Veravat Hongskul, Marine Fisheries Laboratory, Thailand."
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            "content": "9 Mr. Rudy Kunihisa, Bumble Bee Seafoods, Castle & Cooke, Honolulu"
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            "content": "10"
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            "content": "Mr. Henry K. Lindsey, Eden Corp., Laie, Hawaii"
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            "content": "14 Mr. Keith Brouillard, American Embasy, Toyko"
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            "content": "15 Mr. Robert S. LeGoff, Pryor Corp., Oahu Oyster Farms, Kaneohe"
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            "content": "23 Mr. Clinton E. Atkinson, Consultant, Seattle"
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            "content": "La Jolla Laboratory"
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            "content": "April 8"
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            "content": "Mr. Howard L. Fraley, NASO, NOAA, Seattle, Washington"
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            "content": "15-17 Dr. William Royce, Director, Extended Jurisdiction Planning Office, NOAA visited the SWFC and presented a talk on extended jurisdiction at a general staff meeting."
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            "content": "28 Dr. Frank Augustine, Aerospace Corp., El Segundo, California"
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            "content": "Tiburon Laboratory"
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            "content": "April 8 Keith Brouillard, Fishery Attache with the State Department, Tokyo, Japan"
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            "content": "Bud Schulz, Del Monte Corporation, San Francisco, California"
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            "content": "William Kyono, Bumble Bee Sea Foods, San Francisco, California"
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            "content": "Al Rowe, S.I.O., La Jolla, California"
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            "content": "Roger Edwards, Underwater Biological Research"
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            "content": "28 Robert Byington, Santa Cruz Department of Education, Santa Cruz, California"
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            "content": "29 George Snyder, Northwest Fisheries Center, Seattle, Washington"
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            "content": "Dave Misitano, Northwest Fisheries Center, Seattle, Washington"
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            "content": "21 Stephen Ahern, Biological Technician, (T) Temporary Appointment La Jolla"
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            "content": "Helen Caouette, Clerk-Typist (T) Appointment La Jolla"
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            "content": "Lawrence Means, Biological Aid (T) Appointment La Jolla"
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            "content": "April 27"
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            "content": "Harold Dorr, Biological Aid (T) Conversion to student appointment La Jolla"
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            "content": "28 Elaine Carlin, Biological Aid (T) Student appointment La Jolla"
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            "content": "Mary Beth Murphy, Clerk-Steno Appointment La Jolla"
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            "content": "David Au, Operations Research Analyst, Appointment La Jolla"
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            "content": "TRAINING"
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            "content": "April 15-17 Dr. Jeannette Struhsaker, Systems Analysis for Government Operations"
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            "content": "Susumu Kato; Systems Analysis for Governmental Operations ar"
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            "content": "HONORS AND AWARDS"
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            "content": "The NMFS Scientific Publications Staff in Seattle, Washington has been in- formed that their entry, U.S. Fishery Bulletin has won the Award of Merit in the Technical Journal Category of the Society for Technical Communication's Sixth International Publications Competition. The award will be presented at the International Technical Communications Conference in Anaheim, California May 15 and will be accepted by Mr. Kiyoshi Fukano, Acting Chief, Scientific Publications Staff."
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            "content": "This award is of particular interest and gratification to the Southwest Fisheries Center since Dr. Reuben Lasker of the La Jolla Laboratory served as Scientific Editor of the Fishery Bulletin for 4 years, ending June 30, 1974. During this period, Dr. Lasker strongly influenced the scientific image pro- jected by the Bulletin. In the first year of Dr. Lasker's editorship, the Fishery Bulletin became a quarterly, and in the years 1971-73, the average number of pages printed per year almost tripled, reaching 1,119. Dr. Lasker was able to attract to the pages of the Fishery Bulletin not only outstanding contributions to fisheries science from members of the NMFS staff but also major fisheries papers from scientists outside NMFS."
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            "content": "30"
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            "content": "The success of the Bulletin is reflected by its circulation. First put on sale in January 1972, the Bulletin within less than a year was selling more than 1,000 copies and the list is growing despite increased sub- scription costs. With the free circulation, which has been held to a minimum, added to the paid, the Fishery Bulletin now reaches almost as many readers as the Journal of the Fisheries Research Board of Canada and the Transactions of the American Fisheries Society, both outstanding publications in the field."
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            "content": "Lt. Roger P. Hewitt, NOAA Corps, who has been assigned to the NMFS Southwest Fisheries Center since June 1973, has been informed that he has been selected for assignment in the Fall of 1975 to full-time graduate training in the Applied Ocean Sciences Department, Scripps Institution of Oceanography, University of California, San Diego, pending approval of the Associate Administrator of NOAA."
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            "content": "March 16 Howard 0. Yoshida, Fishery Biologist, Quality Increase - Honolulu Laboratory"
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            "content": "30 Shoji Teramoto, Supply Clerk, Quality Increase Honolulu Laboratory"
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            "content": "April Thomas K. Kazama, Biological Technician, Outstanding Performance Rating - Honolulu Laboratory"
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            "content": "29 Henry Orr, Office Draftsman, Cash Award - La Jolla Laboratory"
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