{"Bibliographic":{
"Title":"Southwest Fisheries Center Monthly Report: April 1974",
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"Publication date":"1974",
"Publisher":"Southwest Fisheries Center (U.S.)"
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"Language":"English",
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    "content": "T OF\nM\nER\nCE\nUNITED\nMERICA\nSTATES OF A\nHONOLULU\nLA JOLLA\nTIBURON\nS\nSOUTHWEST FISHERIES CENTER\nMONTHLY REPORT-APRIL 1974\nResearch Highlights Page\n· NMFS-AFRF Cooperative Albacore-Oceanography Survey to Begin May 28 . 3\n· NMFS/Sea Grant Plans Made for Silver Salmon Rearing at Tiburon Laboratory 5\n· Recreational Fisheries Program Plans Acoustic Tracking of Yellowfin Tuna. 6\n. Scientific Advisory Committee of the Marine Mammal Commission Holds Hearing 8\n· Staff of Marine Mammal Investigations Assembling Material on Porpoise/Tuna Interaction in Preparation of Formal Hearings on Incidental Taking of Marine Mammals 9\n. SWFC Recommends U.S. Submit Two Sets of Tuna Statistics to ICCAT 11\n· Airborne Sea Surface Temperature Surveys Resumed Over San Diego Test Area for 1974 Sport Fishing Season 14\n· Retrospective Look at 10-Year Progress of Fish Aquaculture Research at SWFC 15\n. Baitfish Transport System Survives Critical First Test with Successful Shipment of Live Anchovies from California to Honolulu.\nNOAA/NMFS\n21\nSOUTHWEST FISHERIES CENTER, LA JOLLA, CALIFORNIA HONOLULU LABORATORY LA JOLLA LABORATORY TIBURON LABORATORY\nMONTHLY REPORT-APRIL 1974\nPAPERS PUBLISHED\nBenville, Pete Jr. and Sid Korn. 1974. A simple apparatus for metering volatile liquids into water. J. Fish. Res. Board Can. 31(3): 367-368.\nTranslations\nKikawa, Shoji. 1971. Shunyo Maru's third bait survey in the Papua New Guinea area (Shunyo Maru ni yoru dai-san-ji Papua New Guinea jiryogyo chosa) . Proceedings of the 1970 Japanese Tuna Fishery Research Conference, Shimizu, Japan, February 3-5, 1971, p. 255-262. Fisheries Agency of Japan, Far Seas Fisheries Research Laboratory. (Translated from Japanese by T. Otsu, 1974, 10 p. , Translation No. 2; available at Southwest Fisheries Center, National Marine Fisheries Service, NOAA, Honolulu, HI 96812.)\nKinki University Fishery Experimental Station. 1974. Artificial fertilization and rearing experiments conducted on tunas in 1973. . . A progress report (Showa 48-nendo maguro-rui fuka shi-iku gijutsu kaizen shiken hokoku-sho) . Preliminary progress report prepared for a special meeting of cooperating agencies working on tuna culture research, Shimizu, Japan, February 26, 1974, 23 p. (Mimeogr.) (Translated from Japanese by T. Otsu, 1974, 18 p. , Translation No. 3; available at Southwest Fisheries Center, National Marine Fisheries Service, NOAA, Honolulu, HI 96812.)\nSuisan Sekai. 1973. This year's saury (Cololabis saira) landings result in both joy and sorrow (Hiki komogomo kotoshi no sanma ryo) . Suisan Sekai (22(11): 32-43. (Translated from Japanese of selected highlights by T. Otsu, 1974, 11 p., Translation No. 1; available at Southwest Fisheries Center, National Marine Fisheries Service, NOAA, Honolulu, HI 96812.)\nThis report does not constitute publication and is for information only .\nNMFS LABORATORY AT TIBURON TO BECOME PART OF SOUTHWEST FISHERIES CENTER\nThe NMFS Tiburon Laboratory which formerly reported to the Southwest Regional Office in Terminal Island, will become a part of the Southwest Fisheries Center next month, according to Dr. B. J. Rothschild, Center Director. This arrangement, originally recommended by the Blue Ribbon Committee on NMFS Organization, has been cleared by the appropriate NOAA and NMFS officials and cleared in concept by the NOAA Administrator, Dr. White. The target date of May 12 has been established for documenting the required organizational changes in the NOAA/Dept. of Commerce ad- ministrative systems.\nDr. Rothschild explained that the recommended arrangement would achieve more effective coordination of research among Fisheries Centers and lab- oratories, and is consistent with the intent of establishing Centers having the capacity to strengthen the management, coordination, and planning of the resource research through broad ecological zones. The Southwest Fisheries Center reports organizationally to the Associate Director of Resource Research in Washington, D.C.\nThe Tiburon Laboratory, which occupies several buildings at a former Navy installation in the Tiburon Peninsula, has a staff of 23, headed by Acting Director Norman Abramson. Scientists at Tiburon conduct a range of re- search related to coastal California fishes, their ecological relationships, and their associated recreational and commercial fisheries. Also carried out at the Tiburon Laboratory is pollutant research which involves studying the physiological effects of pollutants on fishes as well as researching the physical processes which determine the distribution and concentration of pollutants in the coastal zone.\nALBACORE FISHERY INVESTIGATIONS\nStatistical Examination of Relationships Between Environmental Variables and Geographical Distribution of West Coast Albacore Fishery Completed\nAs part of the continuing study on the influence of inter-annual environ- mental fluctuations on the North American West Coast albacore fishery, Dr. N. Clark, Meteorologist at the La Jolla Laboratory, has completed a statistical examination of relationships between large-scale patterns of mid-tropospheric atmospheric flow (at about 10,000 feet) and sea surface temperatures over the entire North Pacific and the yearly changes in the center of the albacore fishery along the coast over a 25-year period, 1948-72.\n2\nBy correlating the percent of total West Coast albacore catch taken north of San Francisco with the deviations from normal (anomalies) of the environ- mental data at 5° latitude-longitude grid points over the 25-year period, features in both the atmospheric circulation and sea surface temperature patterns were found to be significantly related to north-south shifts in the center of the albacore fishery .\nDuring the summer months of June, July, and August when the fishery is in progress, a northern center of the fishery is associated with above-normal temperatures in the eastern North Pacific east of 150°W longitude and below-normal temperatures in the central and parts of the western North Pacific. The atmospheric circulation pattern associated with a northern fishery during these months tends toward a ridge in the mid-tropospheric flow that extends over the eastern North Pacific and the North American coastal regions and a trough over the central and western North Pacific.\nData from the spring months of March, April, and May preceding the fishing season indicate that a northern fishery tends to follow above normal sea surface temperatures in the eastern North Pacific east of 135°W and east of 170°W along 20ºN and below normal temperatures over the central and western North Pacific. The correlations also indicate that a ridge in the mid-troposphere over the eastern North Pacific and coastal regions of North America, a trough over the central Pacific and another ridge over the western Pacific is the type of atmospheric flow pattern that tends to precede a northern albacore fishery. It also follows from the correlations that a reversal of these environmental patterns would precede a more southern fishery.\nIn addition to the correlation patterns, regression equations between the percent albacore catch and environmental data were also derived with a multiple regression and screening procedure developed by R. Born of the NORPAX group at Scripps Institution of Oceanography. The results show that the percent of total albacore catch taken north of San Francisco can be fairly well \"specified\" from summer environmental data or \"predicted\" from spring data using a three-term linear regression equation, at least over the dependent data period.\nNMFS-AFRF Cooperative Albacore-Oceanography Survey to Begin May 28\nPreparations for a cooperative albacore-oceanography survey with the American Fishermen's Research Foundation (AFRF) are underway. The NOAA research vessel, David Starr Jordan, and five jig-fishing vessels on charter to the AFRF will conduct joint operations, May 28 through July 6 in the offshore distribution of albacore, their migration into the nearshore fisheries, and the concurrent developments in the ocean environment.\n3\nResults of surveys conducted in this region during 1972 and 1973 showed that the concentrations of albacore associated with the Transition Zone and its southern boundary migrated to the central and southern California fisheries. The effort during the upcoming survey will be concentrated upon examining the migration paths of albacore into the northern albacore fishery. Dr. Michael Laurs, Leader of the Albacore Fishery Investigations and Mr. R. Lynn who will be the cruise leader on the forthcoming cruise, have com- pleted plans and arrangements with AFRF.\nCOASTAL FISH COMMUNITIES INVESTIGATIONS\nUnder the leadership of Dr. E. Hobson, Fishery Biologist at the Tiburon Laboratory, the staff of this investigation describes and analyzes eco- systems associated with coastal fish communities. Currently fish com- munities occupying California kelp beds are being studied. Species occupying this environment constitute some of the most important recre- ational varieties and their associated prey. Site of the actual research conducted is the Santa Catalina Marine Biological Laboratory at Santa Catalina Island.\nEcology of Kelp Bed Fishes Studied\nThis month, Dr. Hobson, working with Fishery Biologist Tony Chess, reports that quarterly monitoring of the biota along the transect line running through the Lion's Head kelp bed at Catalina Island has continued to indicate a loss of Macrocystis plants in the shoreward part of that bed. Along with the loss of surface canopy there, and the resulting increase in sunlight on the sea floor, there has been increasing growth of low benthic algae, especially Pterocladia. With this have appeared several fishes that live associated with these algae, notably the blenny Gibbonsia elegans, and the cottid Orthonopias triacis. These fishes have largely replaced here the goby Lythrypnus dalli, which lives on these same rocks when they lay bare under the shade of the Macrocystis.\nA specimen of the serranid Anthias gordensis was collected during regular sampling at ship rock, which is the first record of this species in California. A tropical species, it was previously unknown along the Pacific coast north of Cape San Lucas, Mexico.\nArrangements were completed for Dr. William MacFarland, Cornell University to work with Dr. Hobson and Mr. Chess next month. Plans are to integrate Dr. MacFarland's study of visual pigments and the characteristics of light underwater into a segment of the on-going NMFS investigation.\n4\nCOASTAL FISHERIES INVESTIGATIONS\nUnder the leadership of Mr. Norman Abramson, Fishery Biologist and Acting Laboratory Director, this investigation encompasses all activities at the Tiburon Laboratory related to the coastal fisheries of California. These include, or may include, stock assessment, gear efficiency evaluation, fishery resource utilization improvements, and descriptive accounts of fishes and their associated fisheries. Both recreational and commercial fisheries are covered by the Investigation. Present activities include work on developing management strategies for some migratory game fishes, the development of commercial fisheries on underutilized resources, and prep- aration of the Pacific Angler's Guide. The latter provides a description of recreational fishes and their associated fisheries of the Pacific Coast of the United States, Hawaii, Guam, and American Samoa, to stimulate in- creased utilization of the recreational resources.\nPlans Made for Silver Salmon Rearing\nActing Director Abramson and Mr. L. Richards, Fishery Biologist at the Tiburon Laboratory participated in several meetings with UC, Davis and San Francisco Tyee Club members during the month on logistics for the experimental rearing in sea water of silver salmon, during a 6-month period. Mr. Abramson reports that a portion of the materials for pen construction were delivered and the pen should be built and installed before the end of May, when 8,000 silver salmon smolts will be placed in the pen.\nProgress Made in Fishery Development\nFishery Biologist Susumu Kato at the Tiburon Laboratory is in charge of developing fisheries for underutilized species. This month he reported the following progress in the red crab and sea urchin fisheries, both under- utilized marine resources.\nWith the aid of Dr. Peter Lerke of the National Canners Association in Berkeley, 10 pounds of cooked sea urchin roe were packed in 1/2-pound cans. The roe was provided by the Southern California Trading Corporation. The product was markedly different from Japanese canned sea urchin roe. Ours was much softer and the color was duller. Samples sent to Japan were inspected by some buyers, and all agreed that our methods need to be im- proved. Although our product was runnier, the moisture content was 64.5 percent; the Japanese canned roe had a moisture content of 66 percent. Although not indicated on the label, it is suspected that the Japanese use\n5\nvegetable gum or other hardening agent to solidify the roe. A good market is available for canned roe if an acceptable product can be produced here. Production of canned roe would be a good alternative to fresh roe in the summer months when prices for the latter are low. Most of the California processors have suspended operations or are limiting production of fresh roe until fall.\nThe fishing vessel Lady Olga left San Diego on April 10 on her fourth red crab trip. The catch was sold in advance to a salmon-rearing firm in the Northwest. Processing and feeding experiments are being conducted by both private and salmon growers and NMFS (NW Region and Pacific Food Products Technology Laboratory (PFPTL)), Seattle, Washington. About a hundred pounds of red crabs were processed by a firm in South San Francisco, using methods developed by John Spinelli of PFPTL. This consists of using a carrier such as wheat middlings or mill run wheat. Additionally some red crabs were dried under a high vacuum without a carrier. The samples were sent to Spinelli for analysis of carotenoid pigments.\nAngler's Guide to the U. S. Pacific Coast in Preparation\nMs. Susan Smith, Publications Specialist at Tiburon Laboratory, reported that she met with the co-author, James Squire of the La Jolla Laboratory to review in detail the southern California, Washington, and Oregon sections of the Angler's Guide to the U. S. Pacific Coast. The authors found data for a few sections of the coast were incomplete, particularly the Puget Sound area. Mr. L. Richards, who is now in the Puget Sound area gathering in- formation for Tiburon Laboratory's pen-reared salmon project, was asked to obtain some of this information during his week-long stay there.\nOn April 14, an article featuring the Guide appeared in the Sunday supple- ment section of the San Francisco Chronicle/Examiner. A good amount of favorable comments and requests for copies of the Guide have been received as a result of publication of the article.\nFISH ENVIRONMENT INVESTIGATIONS\nRecreational Fisheries Program Plans Acoustic Tracking of Yellowfin Tuna\nA popular recreational fishing area for yellowfin tuna is off the leeward coast of Oahu. Arrangements have been made by Fishery Biologist Heeny Yuen, leader of the Recreational Fisheries Program at the Honolulu Laboratory\n6\nto study the movements of the yellowfin tuna in the area by tracking them with an acoustic system. Fishery Biologist Andrew Dizon and Fishery Aid Elliott Kawahara made a couple of functional tags, but these remain to be field tested. Testing awaits the arrival of a transducer-receiver from La Jolla. The transducer in turn is awaiting the delivery of a housing unit caught in the Canadian postal strike. A delay in the delivery of a few parts is holding up further production of tags.\nData processing for the Honolulu Laboratory's commitment to the Hawaii Water Resources Regional Study is all but completed. The report, which is to describe the marine resources and habitats of the coastal waters of the State of Hawaii, has been outlined.\nMr. Yuen has completed the first draft of a paper \"Desired characteristics of a bait for skipjack tuna\" for the baitfish workshop to be held at the Honolulu Laboratory in early June of this year.\nMr. Yuen, who has the responsibility for coordinating NMFS participation in Makahiki Kai (The Sea and Me) , an ocean-oriented collection of exhibits organized by Sea Grant, reported that Scientific Illustrator Tamotsu Nakata and Mr. Kawahara devoted time this month to preparation of the Honolulu Laboratory's display .\nBehavioral Thermoregulation System Acquires Refrigeration Unit\nDuring the past month, the refrigeration unit for the tuna behavioral regu- lation system was received and has been incorporated into the system. Construction is now complete except for installation of the heater-switching assembly. The development of this system is spearheaded by Drs. William H. Neill and Andrew E. Dizon, Fishery Biologists with the Life Studies, Tuna and Tunalike Fishes Program at Honolulu. It is a unique apparatus for the study of tuna behavior in temperature gradients like those in the open ocean, and consists of a doughnut-shaped tank (8,000 liters) wherein the temperature is controlled automatically by the direction and speed of the tuna swimming in its circular channel. The tuna regulates the temper- ature of the tank by reversals in swimming direction and thereby communi- cates its temperature preference to the researchers. Anticipated results of these studies include the tunas' preferred temperatures, a set of parameters with high potential value in predicting tuna distribution in the ocean.\n7\nOrientation and Regulatory Responses of Kawakawa to Food Gradients in Doughnut Tank Noted\nDrs. Neill and Dizon have begun a series of experiments, carried out in the doughnut tank, to investigate the behavioral mechanisms whereby tunas locate and remain in areas of the ocean with high food availability. Within the tank, experimental subjects are able to regulate their positions in a gradient of food density by their swimming direction. Of particular interest to researchers are: 1) the minimum level and gradient-slope of food density necessary for successful regulatory response, and 2) the relationship be- tween swimming speed and turning frequency, and food density.\nDuring the past month, several experiments tested the ability of a kawakawa (Euthynnus affinis) to regulate its position in a food density gradient varying linearly from one item in 50 m to one item in 550 m over a distance of 2.5 km. The fish successfully regulated food availability (achieved a larger ration than expected for a randomly swimming fish) by alternating between clock- wise and counterclockwise swimming in the vicinity of food \"locations\"; however, the fish did not spend proportionately more time in the upper (richest) end of the gradient. Swimming speed varied between 2.4 and 3.6 body lengths sec-1 but was not clearly related to food density.\nSalinity Perception Experiment Loses Subject Kawakawa\nAs an orienting cue for migrating tunas, salinity ranks importantly among the physical variables. Dr. Dizon of the Honolulu Laboratory and Mr. Thomas Byles of the University of Wisconsin are conducting an experiment to determine the minimum step-change in salinity a tuna can detect. After 2 months' conditioning with food reinforcement, a kawakawa living in a sea water-filled tank consistently discriminated between 50% and 100% sea water (17 and 34% salinity) . The fish died, however, before tests could be made at lesser salinity differences. Training is underway with a new subject.\nMARINE MAMMAL INVESTIGATIONS\nScientific Advisory Committee of the Marine Mammal Commission Holds Hearing in San Diego\nThe Committee of Scientific Advisors to the Marine Mammal Commission held hearings in San Diego on April 19 and 20. Among other activities, they were briefed, on the afternoon of the 19th, on progress and direction of\n8\nporpoise work conducted by the La Jolla Laboratory. Taking part in the dis- cussions were Center Director Rothschild, who introduced the speakers and briefly discussed the overall program; Dr. Eric Barham, Porpoise Program Manager, who talked about the steps taken by NMFS and industry in de- veloping gear and technique modifications leading toward reduction of por- poise mortalities; Dr. Tim Smith who discussed the methods for estimating size of porpoise populations; Dr. Gary Stauffer, who spoke on estimates of porpoise kill and methods for obtaining these estimates; and Dr. William Perrin who answered questions concerning his work on differentiation and distribution of porpoise stocks.\nStaff of Marine Mammal Investigations Assembling Material on Porpoise/ Tuna Interaction in Preparation for Formal Hearings on Incidental Taking of Marine Mammals\nLed by Dr. Eric Barham, the staff of the Marine Mammal Investigations at the La Jolla Laboratory is assembling material and statistics from the por- poise observer trips, porpoise assessment surveys, and various other data on the interaction between porpoise and tuna in preparation for a formal hearing on incidental taking of marine mammals slated in Seattle, Washington, May 15. Purpose of these hearings, according to Dr. Barham, is to lay a evidentiary base for the manner in which NMFS proposes to treat the prob- lems associated with the incidental taking of marine mammals by commercial fishermen, with particular emphasis on tuna/porpoise. Before the 2-3 week hearings are concluded, the government will enter into the formal record created by the hearing process a summary of the scientific base for the regulations which will be adopted. In addition, the hearing will furnish the forum for receipt of industry and other public reaction to the regulatory process. It is not known at this time whether anyone on the staff at the La Jolla Lab- oratory will be asked to testify directly, although Center Director Rothschild and Dr. Barham will go to Seattle to review the scientific data before the hearings .\nPaper Nearing Completion on Reproduction and Biology of Spotter Porpoise\nKnowledge of the life histories and ecologies of the major porpoise species involved in the tuna fishery of the eastern tropical Pacific is an essential prerequisite to any realistic assessment of the impact of the fishery on the porpoise population. By far the most important species of porpoise taken with tuna is the spotted porpoise, Stenella attenuata, commonly called the \"spotter.\" Dr. William Perrin, leader of the project at the La Jolla Lab- oratory on porpoise life studies is completing a paper on reproduction and biology in the spotter porpoise in collaboration with J. Coe and D. Holts, from which the following information, subject to revision, has been extracted.\n9\nCalves are born one at a time with the average length at birth, 82.5 cm. Average length at 1 year is 138 cm. Females mature sexually at about 180 cm, at 4-8 years of age (the range reflects existence of differing interpretations of age-related layers in the teeth); the gestation period is 11.5 months.\nMales mature sexually at about 195 cm and 6-11 years of age. Some growth occurs after attainment of sexual maturity. The average length of adult males is 201 cm and, of adult females, 187 cm. Corresponding weights are about 80 kg and 60 kg, respectively. Maximum length of adult males is about 220 cm and of adult females, about 200 cm. Usual lifespan is probably between 15 and 25 years. Breeding is diffusely seasonal, with two and possibly three periods of reproductive activity annually. The time of these breeding peaks may vary from year to year.\nAssuming that samples of animals taken in the tuna fishery are representative of the population, average length of reproductive cycle, that is, the inter- val between calving, is 2.17 years. Average pregnancy rate is 0.47. Lac- tation lasts on the average 11.2 months. About 10% of lactating females become pregnant during lactation. The pregnancy rate decreases with age from about 0.6 in newly mature females to about 0. 3 in old females. Lac- tation rate increases with age, indicating that while the average length of cycle remains about the same, calvings decrease and lactation lengthens . Mortality rates have not yet been estimated.\nAs part of the expanded porpoise investigations at the La Jolla Laboratory, trained observers are sent to sea on tuna seiners of the U. S. fleet to collect vital information on porpoise life history and mortality, and to observe the operation of porpoise-saving gear and techniques. Thus far 27 observer trips have been completed within the Commission Yellowfin Regulatory Area (CYRA); three of the observers have returned from their second trips. Presently eight observers are still at sea, all except one on their second trips of the 1974 yellowfin tuna fishing season.\nDr. Barham, Porpoise Program Manager, is making tentative plans for six more observers to accompany tuna seiners on trips outside the CYRA but final determination to send these observers depends on such factors as the success of skipjack fishing, the prevalence of school fish (tuna traveling without porpoise) , and whether skippers will decide to fish for yellowfin (the species most commonly found associated with porpoise) outside the CYRA.\n10\nPHYSIOLOGY INVESTIGATIONS\nThis investigation at the Tiburon Laboratory deals with the physiological effects of pollutants on fishes, molluscs and crustaceans. Current efforts are devoted to studying the effects of the low-boiling aromatic components of petroleum products on selected species of marine fish during all life stages from egg through adult.\nThis month, Dr. Jeanette Struhsaker, Fishery Biologist at the Tiburon Lab- oratory, reported that adult Pacific herring are being exposed to two sub- lethal concentrations of xylene for a 3-week period. Blood parameters and the uptake and distribution of residues are being measured. Preliminary results showed that brain tissue accumulated 5. 6 ppm and liver tissue 4.3 ppm xylene after the fish were held for 3 days in a bath containing 1.5 ppm xylene.\nCalibrations and methods for use of 14c aromatic compounds in uptake studies are being developed. A tissue solubilizer is being used to digest samples for scintillation counting.\nA gas sampling system was installed on the Micro-Tek 220 GC, which now allows the analysis of aromatic components in water samples in the parts per trillion range.\nThe analysis of data from previous experiments with adult and larval fish exposed to xylene is near completion, and results of these experiments are being prepared for publication.\nSTOCK ASSESSMENT AND FISHERY EVALUATION INVESTIGATIONS\nSWFC Recommends U. S. Submit Two Sets of Tuna Statistics to ICCAT\nThe International Commission for the Conservation of Atlantic Tunas (ICCAT) requests that member nations annually submit to ICCAT official statistics on the total catch of Atlantic tunas and tuna-like fishes, for stock assess- ment purposes and certain other ICCAT uses. Since U. S. official statistics are for landings, landing statistics instead of catch statistics have been\n11\nregularly submitted by the U.S. Unfortunately, not all of the U. S. catches are landed in the U. S. or in the year caught and the statistics, therefore, are poor substitutes for catch statistics, especially when they are used for the purposes of stock assessment.\nA team headed by Dr. G. Sakagawa, Fishery Biologist at La Jolla made an in-depth investigation of the problem and recommended that the best solution at this time is for the U. S. to submit two sets of statistics to ICCAT: 1) \"official\" landing statistics and 2) estimated catch statistics. This recommendation was accepted and appropriate action taken.\nThe size composition of yellowfin and skipjack tuna in the American catch from the eastern Atlantic has been estimated annually by scientists in the Stock Assessment and Fishery Evaluation Investigation at La Jolla, for use in stock assessment. Two different techniques, one for yellowfin and another for skipjack, were used to estimate the size composition for years until 1973. The techniques differ in the degree of time-area-boat-stratifica- tion of size-frequency samples and catch; the technique used for yellowfin contains a much finer stratification than that used for skipjack tuna. Tests showed that the finer stratification technique gave a less biased estimate. This technique was therefore used for both yellowfin and skipjack beginning in 1973.\nThe task of re-estimating past years (1969-72) size composition of the catch of skipjack tuna with the finer stratification technique has been initiated. Mr. A. Coan, Mathematician and Mr. E. Holzapfel, Biological Technician, are performing the task under the direction of Fishery Biologist G. Sakagawa.\nScientist from Brazil on Training Mission at SWFC's La Jolla Laboratory\nMr. Luis A. Zavala-Camin, scientific researcher of the Instituto de Pesca, Santos, Brazil, is on a 6-month training mission at the La Jolla Laboratory. Mr. Zavala-Camin is working with Drs. W. Fox, W. Lenarz, and G. Sakagawa of the Stock Assessment and Fishery Evaluation Investigations on techniques for evaluating the status of tuna stocks.\nFor the past 3 years, Mr. Zavala-Camin has been in charge of the tuna investigations of the Instituto de Pesca in Santos, Brazil. Extensive data on the small (three vessels) but important Brazilian longline fishery of the Atlantic were collected under his leadership. Since arrival in La Jolla early this month, Mr. Zavala-Camin has been organizing the Brazilian longline data and performing general analysis in preparation for more detailed analyses.\n12\nMultiple Gear Yield Per Recruit Model Documented\nDr. William Lenarz, Fishery Biologist at the La Jolla Laboratory, has generalized and documented the computer program, MGEAR, so that it may be used by other scientists. The program computes estimates of yield per recruit and several related parameters for fisheries that are exploited by several gears having differing vectors of age specific fishing mortality. Tables of yield per recruit, landings per recruit when fish below a minimum size are caught and discarded dead, average weight of fish in catch, and yield per recruit per effort as functions of minimum size and amount of fishing effort are contained in the output for each gear and the entire fishery. A brief manuscript that describes the program has been prepared by Dr. Lenarz.\nProduction Model Methodology Completed\nDr. William Fox, Leader of the Stock and Recruitment Investigations at the La Jolla Laboratory, has completed revision of a manuscript describing a least-square method for fitting the generalized stock production model. The method uses John Gulland's concept of equilibrium approximation but involves a new weighting procedure for estimating equilibrium levels of fishing effort. Variability indices of the parameter estimates were also worked out.\nIn the manuscript, simulated data from a pandalid shrimp fishery were utilized to illustrate the efficacy of the fitting method. The results indi- cated that the methodology can be useful for analyzing the status of a par- ticular fish stock; however, the assumptions and limitations were also dis- cussed. Documentation on use of the computer program, PRODFIT, which performs the calculations has been completed.\nRate of Environmental Observations from Tuna Seiners Up in April\nDuring the first quarter of 1974, 67 tuna purse seiners equipped with radio facsimile equipment radioed 640 weather observations and 112 expendable bathythermograph (XBT) observations to Commerce-licensed ratio station WWD. This total of 752 environmental observations is 41% below the re- porting rate for the first quarter of 1973, according to Oceanographer R. Evans of the La Jolla Laboratory. Much of this drop-off can be attributed to the late start of the 1974 tuna fishery in mid-January and the tendency of many boats to fish school fish rather than tuna associated with porpoise. Fishing on school fish make greater demands on the crews' time, than does the fishery on tuna schools traveling with porpoise. The reporting rate improved in April 1974 and was up 41% from April of 1973.\n13\nAt this time, 14 San Diego-based tuna vessels have purchased their own radio facsimile recorders and this number is expected to increase, reflect- ing a spreading interest in the FAX program. However, the quality of radio facsimile advisories on weather and fishing conditions can be maintained only through continued cooperation of the fishermen in observing and re- porting environmental data.\nFinal Report Submitted to NSF on Ships-of-Opportunity-XBT Project\nOceanographer J. F.T. Saur of the La Jolla Laboratory submitted a final technical report on the ships of opportunity-expendable bathythermograph (XBT) project funded by the National Science Foundation (NSF) , Office for IDOE, under NSF Grant AG-256 for the period March 13, 1971-December 31, 1973. With IDOE support, 134 sections of closely-spaced XBT observations were made on seven shipping routes in the tropical and North Pacific Ocean, for a total of more than 3, 300 observations. Beginning in March 1972, 41 sections on the Hawaii-San Francisco route were published in Fishing Infor- mation, published monthly by the La Jolla Laboratory .\nThe project, which is a cooperative effort of the Southwest Fisheries Center and the NMFS Pacific Environmental Group at Monterey, is presently con- tinuing as part of the North Pacific Experiment (NORPAX) with joint support from the National Science Foundation and the Office of Naval Research.\nAirborne Sea Surface Temperature Surveys Resumed Over the San Diego Test Area for 1974 Fishing Season\nFishery Biologist J. Squire of the La Jolla Laboratory reports that airborne sea surface temperature surveys were resumed this month over the San Diego Test Area for the 1974 fishing season. At weekly intervals the im- portant sportfishing areas from near Del Mar in the north to south of the Coronado Islands and up to 15 miles offshore will be surveyed from a twin- engined Beechcraft aircraft equipped with precision infrared radiometer. This will be the third and final year of such surveys, which are conducted during the peak fishing period, April through October.\nSurvey flights were made by Mr. Squire on April 1, 11, 17, and 23. From the results of these surveys isotherm charts were drawn and distributed to a small mailing list of local sportfishing operators and other interested persons.\nThe catch/environment study utilizes these temperature data for comparison with trends in sportfish catch. The number, species, angler effort, and location of marine game fish caught off San Diego are routinely obtained\n14\nby the California Department of Fish and Game from sportfishing boat logs. The temperature and catch data will be analyzed to determine the relation between temperature levels and catch and catch changes relative to tem- perature change.\nTo date, 65 survey flights have been conducted over the test area since the inception of the program.\nCooperative Marine Game Fish Tagging Program Annual Report Distributed\nThe 1973 Annual Report was distributed this month by the La Jolla Laboratory to all cooperating marine game fishermen participating in the tagging program. This report reviews the program of the tagging program during the past year, and the trend in billfish catches for the important fishing areas in the Pacific.\nA postcard form was enclosed with the Annual Report, to survey the angler billfish catch in 1973. Mr. J. Squire, Fishery Biologist, who is in charge of the tagging program, reports that these postcard forms for the \"Pacific International Billfish Angling Survey,\" are being returned in good numbers.\nSTOCK AND RECRUITMENT INVESTIGATIONS\nRetrospective Look at 10-Year Progress of Fish Aquaculture at SWFC\nDescribing the work of his program for the National Fisheries Plan, Dr. Reuben Lasker, Leader of the Stock and Recruitment Investigation, took a retrospective look at the progress of fish aquaculture at the SWFC for the past 10 years. The main purpose of the program on the survival and mortality of marine fish larvae has been to gather information which can be applied to the problem of fish population fluctuations in the sea. Because of the continuing need for live fish eggs and larvae for experimentation it became increasingly necessary to devise techniques to insure the avail- ability of fish larvae at all times of the year, and to rear these larvae successfully through metamorphosis.\nAccording to Dr. Lasker, at this time, sexual maturation of a number of fish can now be routinely accomplished in the aquarium of the La Jolla Laboratory despite the seasonal nature of maturation and spawning in the sea. Marine fishes which have been successfully matured and spawned include the northern anchovy (Engraulis mordax) , the Pacific sardine (Sardinops caeruleus); the croaker (Bairdiella icistia) , the Pacific mackerel (Scomber japonicus) , and the anadromous striped bass (Morone saxatilis) . Combinations of selected photoperiods and temperature are the main environ- mental cues used to mature these marine fish. For example, adult northern\n15\nanchovy can be induced to mature and spawn daily throughout the year if kept under a constant daily 4 hours light-20 hours dark cycle at 15ºC. Other fishes may require long light and short dark daily cycles and different temperatures. Although the anchovy spawns eggs spontaneously under laboratory conditions throughout the year, this is not common in other fishes. Under normal circumstances, mature fish require injection of human chorionic gonadotrophins to induce mass spawning. Despite its anadromous nature striped bass have been induced to mature and spawn out of season in full sea water; fresh water was needed for fertilization.\nRearing of larvae through metamorphosis has been achieved with all the species mentioned using either cultured marine food organisms such as the dinoflagellate Gymnodinium splendens, the rotifer Brachionus plicatilis and the harpacticoid copepod Tisbe furcata, or with wild plankton sieved from sea water.\nStriped bass eggs and larvae require slow acclimation to increasing salinity over an 18-day period to survive in full sea water. Once this is achieved, however, metamorphosis is completed successfully and growth is rapid if the fish are well fed.\nThe maturation and spawning of striped bass in sea water and the acclimation of its eggs and larvae to sea water suggests that a sea water hatchery for this species may be possible where fresh water is at a premium, as in southern California. Work on striped bass at the Southwest Fisheries Center is a collaborative effort between the Inland Fisheries Branch of the California Department of Fish and Game and the La Jolla Laboratory.\nExperiment with Laboratory-Reared Anchovy Larvae Repeated at Sea; Chlorophyll-Maximum Layer Re-established After Storm\nDr. Reuben Lasker, Leader of the Stock and Recruitment Investigations, continued his work at sea this month to determine if the chlorophyll-maximum layers inshore continue to be good feeding grounds for first-feeding anchovy larvae. Using cultured larvae from laboratory-spawned eggs, Dr. Lasker found that there was a well-established chlorophyll maximum layer at 16 m depth over the 20-fathom line near San Onofre, California.\nFirst-feeding anchovy larvae showed active feeding on the phytoplankton particles which were numerous in this layer. This result was similar to the one obtained at the same place last month. However, the night following this observation a wind storm (4.7 on the Beaufort scale) came up and forced the research vessel, Jordan, into port for part of a day. When the station at San Onofre was reestablished the chlorophyll maximum layer had been\n16\nobliterated and there was no significant feeding by larvae when placed in this water. The San Onofre station was revisited on April 22, 12 days after the storm. The chlorophyll maximum layer had been reestablished and the anchovy larvae bioassay indicated it was once again a good feeding ground for fish larvae.\nEfforts Resumed to Spawn Pacific Mackerel in Laboratory with Hormone Injections\nEfforts have been resumed this month by Mr. R. Leong, Fishery Biologist at the La Jolla Laboratory, to improve upon the techniques for spawning Pacific mackerel in the laboratory with hormone injections. The combina- tion of salmon pituitary extract followed a day later with gonadotropin from pregnant mare serum appeared promising and was used to spawn fish on two occasions. The yields were 2 and 5 thousand viable eggs which is sufficient for some types of larval experimentation. However, the number of viable eggs was still less than 20% of the total spawned and work is continuing to improve techniques .\nMr. Leong has observed that mackerel in post-spawning condition require a lengthy period to reach functional maturity again -- the level of develop- ment at which a fish can be spawned with hormone application. The fish held in outside tanks under ambient light and temperature conditions which stopped spawning last September again became functionally mature in April after a period of about 6 months. Fish held inside under a photoperiod of 14 light, 10 hours of darkness and 18ºC temperatures became spawnable about a month and a half earlier, but the waiting period was still 4-5 months.\nMr. Leong also used hormones to spawn anchovies on several occasions, to provide large numbers of eggs for larval studies. The injections worked very well with the result of high fertility and hatching rates. Unfortunately, one of the tanks containing a spawning group of anchovies burst open over a weekend and all the fish were lost. The tank and fish have since been replaced and steps are being taken to prevent a recurrence of the accident.\nInduced Maturation of Female Striped Bass Successful\nMessrs. K. Lal and A. Kuljis of the California Department of Fish and Game working in cooperation with Dr. R. Lasker, Physiologist and Leader of the Stock and Recruitment Investigations at the La Jolla Laboratory, reported the induced maturation of a 20-pound female striped bass held in sea water. This was accomplished by combining favorable photoperiod (15 hours light, 9 hours of darkness) . It now appears certain that the major barrier preventing\n17\nthe females from attaining complete maturity in sea water can be removed by serial injection of human chorionic gonadotrophins (HCG) .\nThe first injection of HCG was given after the female had reached an egg development of 0.75 mm diameter with photoperiod alone. A fortnight later, the eggs had attained a size of 1.2 mm diameter. A second injection was given after 16 days to induce spawning. The female responded extremely well to the hormone treatment and in less than 24 hours after the second injection it started to release eggs. The mass of eggs looked greenish in color and the yolk had cleared, indicative of ready-to-fertilize ova. A partial stripping of 20,000 eggs was made at first, followed by a second stripping of about 10,000 eggs an hour later. Both times, fertilization was attempted in fresh water with milt squeezed from a single male, also matured in sea water. Actual cleavage was observed in many eggs 2 hours after fertilization. No larvae developed from the eggs but it is uncertain whether this was due to inadequate sperm or fouling of the tank which occurred overnight.\nWork Continues on Handbook of Early Life History Stages of Fishes of the California Current\nSenior Scientist Elbert Ahlstrom reports that work continued at La Jolla in assembling, illustrating and studying life history series for inclusion in the handbook of early life history stages of fishes of the California Current. Mr. Henry Orr, Office Draftsman, completed illustrations for three life history series and is working on several additional series.\nMs. Barbara Sumida, employed on a Smithsonian Institution contract, joined Dr. Ahlstrom's group in April where she is assembling series for inclusion in the handbook, as well as making morphometric measurements and meristic counts on selected specimens, and selecting series for illustration. Ms. Sumida has had considerable experience working with larval fish collected off the Hawaiian Islands and participated in Dr. Ahlstrom's 6-week larval fish course given in 1972.\nWork has also continued in assembling data for a manuscript dealing with midwater trawl collections made on extended CalCOFI Cruises 7205 and 7210. Mr. John Butler is working with Dr. Ahlstrom at La Jolla on this project and will be a co-author of the manuscript. Work also continued in identifying fish eggs and larvae taken on Cruise 7205 in surface (neuston net) hauls, regular CalCOFI hauls, and \"deep\" oblique hauls. Ms. Elizabeth Stevens, Biological Technician, is primarily responsible for this project.\n18\nDr. Ahlstrom was able to devote several days this month to work on a manuscript dealing with the life history of the northern anchovy, a coop- erative study with Fishery Biologists D. Kramer and R. Counts.\nThe objective of the daytime portion of Cruise 85 on the Jordan from April 24-26, was to obtain length-weight relationships for certain species of rockfishes (Sebastes) . Fishing was carried out on Sixty-Mile Bank at 0600-1600 hours on April 25 and Forty-Three Fathom Bank at 0600-0900 on April 26. According to Dr. G. Moser, Fishery Biologist at the La Jolla Laboratory, who was in charge of the trip, about 100 specimens of Sebastes comprising 11 species were collected on April 25 and 16 specimens com- prising six species were taken on April 26. All specimens were measured, sexed, and analyzed for gonad maturity and stomach contents. Proper weighing of the fish was precluded by rough seas.\nDr. Moser also reports that he has made progress on the identification guide to scorpion fish larvae of the eastern Pacific, and this section on the rockfishes is nearing completion. A series of Sebastes marinus, the Atlantic redfish was sent to Dr. Moser by the NMFS Laboratory at Narragansett and has enabled him to make a comparison of larvae of Sebastes from both the Atlantic and Pacific Oceans.\nStudy of Effects of Starvation on Anchovy Larvae Continue\nDr. C.O'Connell, Fishery Biologist at the La Jolla Laboratory reports that studies of the effects of starvation on anchovy larvae continued this month with preparation of specimens from a number of laboratory trials for histological examination. In the most recent of these trials close to 500 larvae were re- trieved by harvesting the entire living population of one food treatment and one no-food treatment container on each of 10 successive days following hatching. While mortality increased slightly on day 9 in the presence of food, it was almost total on day 8 in the absence of food. The range of standard lengths was considerable from all containers, but whereas average length increased steadily throughout in the presence of food, it declined steadily after day 5 in the absence of food.\nSpecimens from the latter trial will be processed in small groups to pursue and delineate histological and histochemical variability that suggests dif- ferences between the fed and starving conditions. The first group being processed represents the largest and smallest specimens from each treatment on each day. Some are being prepared for routine staining, some for study of lipoid architecture, and a few are being prepared for electron microscope examination.\n19\nNOAA Researcher Examines Effects of Reduced Oxygen on Fish as Swimming Approaches Speeds Adequate to Support Ram Gill Ventilation\nWhat factors provide primary sensory information for switching between active and passive modes of gill ventilation in fish? This question points out another objective that Dr. John L. Roberts, NRC-NOAA Research Associate, La Jolla Laboratory, has chosen for his study on mechanisms which control breathing patterns in fish. This month, Dr. Roberts has been examining the effects of reduced oxygen on fish as swimming approaches speeds adequate to support ram gill ventilation. Results with three half- moons, Medialuna californiensis, and two jack mackerels, Trachurus symmetricus, show that low concentrations of oxygen have only a slight effect on boosting the conversion swimming speed., Oxygen concentrations must drop to as low as a third of the expected values for air saturated sea water at 170-18℃ for the effect to be seen.\nPrevious experiments with the blue runner, Caranx crysos, at the aquarium, NMFS, Woods Hole, showed that high temperature stress at sub-lethal to lethal levels induces only slight increases in the transition speed for ram ventilation -- another indication that oxygen delivery to the gill surface for satisfaction of metabolic needs can vary widely without significant effect.\nDr. Roberts concludes that oxygen detection is not an important receptor function in the reflex switching between active and passive gill ventilation. He suggests, on the other hand, that flow detection in the bronchial chamber and proprioceptive feedback of tail-beat frequency during swimming are · critical sensory functions for control of the onset of the ram mode of gill ventilation in fish.\nSURVEY SYSTEMS ANALYSIS INVESTIGATIONS\nResults of Sonar Cruises Indicate Probability of Low Relationship Between Occurrence of Pelagic Fish Schools and Bottom Topography\nA series of sonar cruises, designed to test a postulated relationship be- tween the occurrence of pelagic fish schools and bottom topography, was completed in April aboard the R/V David Starr Jordan, under the direction of Lt. R. Hewitt, at the La Jolla Laboratory. According to Mr. Hewitt, a commissioned officer on assignment to NMFS from NOAA Corps, the data suggest that the probability of such a relationship is very low and that the variation of detected target densities within defined topographic categories is as great as the variation between them. The empirical support of the null hypothesis is significant in the specification of sources of variability with regard to hydroactoustic surveys.\n20\nDr. Paul Smith, Investigation Leader at La Jolla has determined the amount of increase in sampling effort needed to obtain estimates of spawning biomass for several inshore sport fishes within given error limits. The biomass estimates would be made from larval surveys exploiting similar methods used for widespread populations such as hake, sardine and anchovy and would necessitate a three-to-four fold increase in inshore sampling .\nVisiting Scientist from Institute of Marine Environmental Research, Plymouth, Arrives at La Jolla Laboratory for 6-Months Stay\nDr. Michael Colebrook, visiting scientist from the Institute of Marine Environmental Research, Plymouth, England, arrived in early April at the La Jolla Laboratory for an expected stay of 6 months. Dr. Colebrook will collaborate with Investigation Leader Paul Smith on various data time series generated over the past 25 years by the California Cooperative Oceanic Fisheries Investigations. Since his arrival, Dr. Colebrook has devised a computer model simulating the dispersal of newly spawned fish eggs; the stochastic model can be used to describe the areal distribution of a patch of eggs after a given time interval(s) .\nTUNA ASSESSMENT AND DEVELOPMENT INVESTIGATIONS\nBaitfish Transport System Survives Critical First Test with the Successful Shipment of Live Anchovies from California to Honolulu\nThe skipjack pole and line fisheries of the Indo-Pacific area are frequently faced with limited supplies of tuna baitfish. In an attempt to alleviate this situation, the Honolulu Laboratory has embarked upon a study of the feasi- bility of transporting baitfish to an area of short supply with the design, construction, and testing of a baitfish transport system. In early April Donald Aasted, Fishery Methods and Equipment Specialist, accompanied the prototype baitfish transport tank to California on board the Matson \"roll-on/roll-off\" freighter Matsonia. During the 4-day transit, Mr. Aasted tested the operation of the open circulation system hooked to the fire hydrant system of the vessel. This delivers 400 gallons per minute of sea water through the transport tank, a supply which is theoretically adequate for from 700-1400 pounds of anchovies based on respiration demand and oxygen availability at the maximum temperatures expected.\nThe tank was met at Long Beach Harbor by Project Leader Roger Green and Fishery Biologist Reginald Gooding. A series of minor tank modifications and dockside experiments with live anchovies were accomplished prior to departing for Hawaii with the first load of baitfish.\n21\nA site was chosen at the dock of Battelle Columbus Laboratories both for its security and proximity to the allegedly cleaner waters of outer Long Beach Harbor. The first experiment ended with about 95% mortality in 3 days of testing on the open system. Three things seemed probable causes for the failure: 1) the pump that was rented for this test on the basis of its advertised specifications of 275 gallons per minute at our operating head actually delivered 100 gallons per minute or less; 2) the amount of fish in the tank was estimated at 600 pounds, but after weighing the fish at the completion of the experiment it was discovered that actually about 1,200 pounds had been loaded; and 3) according to later reports from a local water quality monitoring agency, there were quite possibly some unusual water quality problems in Long Beach Harbor during that period.\nFor the second experiment another pump delivering 200 gallons per minute was used, and the load of anchovies was limited to an estimated 350 pounds. After 4-1/2 days it was determined that 278 pounds had originally been loaded, 5 pounds of which died in the first and second days, 71 pounds the third day, and 21 pounds the fourth day, giving an overall total mortality of 36% .\nA third lot of baitfish, estimated at 550 pounds, was loaded in the tank on the morning of April 16 for shipment to Honolulu on the morning of the 18th. Forty pounds of fish had died by the next afternoon and were siphoned out. The tank was taken by Matson to the ship about 10 hours prior to sailing time, so the fish were subjected to much moving about to temporary loca- tions at five hydrants during the loading of the Matsonia, and were on the closed system for several hours. When they arrived in Honolulu at 0730, March 22, they were taken to the Kewalo facility and unloaded into a 13,000- gallon plastic holding tank with a sea water supply of 60 gallons per minute. Fifty-one pounds of dead fish were removed, an additional 46 pounds having been removed during the crossing by Mr. Gooding, who accompanied them.\nThe remaining fish are still alive and so the original estimate as to the amount carried has not yet been verified.\nA discharge system designed to remove dead fish continuously while the tank is on open circulation is now being installed. Also, a new tank draining system with a 4-inch valve and hose is being installed. The new drain may also serve as a live fish unloading system. These preparations for the May trip are being made by Messrs. Aasted, Gooding, and Kazama at Honolulu\n22\nHonolulu Laboratory Scientist Continues Examination of Catch and Effort Data of Nehu from Kaneohe Bay, Oahu\nDuring April, Dr. Jerry Wetherall, Fishery Biologist in the Tuna Assessment and Development Investigations, continued his examination of nehu catch and effort data from Kaneohe Bay, Oahu. Nehu, a Hawaiian anchovy, is the preferred bait of local skipjack tuna fishermen and Kaneohe Bay is a prime baiting ground. The assessment of the nehu stocks in Hawaii will be among topics discussed at a forthcoming baitfish workshop in Honolulu in June. In addition to preparing for the workshop, Dr. Wetherall reviewed a manu- script on growth of marlins in the central Pacific by Dr. Skillman and Ms. Yong.\nManuscripts and a Trip Report Occupy Fishery Analysis Program in April\nThe Fishery Analysis Program at the Honolulu Laboratory, under the leader- ship of Dr. Robert A. Skillman, carries out the objectives of the Task, Tuna Monitoring and Assessment, Pacific and Indian Oceans, as set forth in SWFC's skipjack development plan, with major emphasis placed on stock assessment, fishery monitoring, and fishery liaison. In addition, the status of exploited stocks of other tuna and tuna-like resources of U. S. concern is being monitored through the systematic collection and analysis of fisheries data. The Task is organized into three subgroups: fishery liaison and monitoring; assessment of skipjack tuna resources; and assessment of other tuna and tunalike resources.\nWork on manuscripts and a trip report dominated this month's activities. The manuscript \"Von Bertalanffy growth curves for striped marlin, Tetrapturus audax, and blue marlin, Makaira nigricans, in the central North Pacific by the progression of modes method\" by Robert A. Skillman and Marian Y. Y. Yong is being reviewed internally.\nA condensed version of the studies on the assessment of South Pacific albacore entitled \"An assessment of South Pacific albacore, Thunnus alalunga, fishery, 1953-71\" by Robert A. Skillman has been written for the Marine Fisheries Review. This manuscript has been sent to the Director, Honolulu Laboratory , for evaluation.\nDr. Skillman prepared a report covering the highlights of his recent trip to American Samoa. He traveled there to review the sampling program for South Pacific albacore and, where possible, to facilitate and expand the . collection of catch, effort, and size-sex data from the fishery. In response to a need voiced by cannery officials and fisheries officers for more timely\n23\nsummaries on the state of the fishery, the Honolulu Laboratory will investi- gate the possibility of providing them, taking into consideration our reduced support staff and the workload involved. Keypunching of the logbooks is continuing and, upon completion, the final, detailed catch-effort reports will be computed as in the past.\nSlim April Catch of Skipjack Tuna in Hawaiian Fishery\nThe estimated April catch of skipjack tuna in the Hawaiian fishery was 197 metric tons. This was down from last year's April catch by 127 metric tons and was 29 metric tons less than the long-term (1948-73) April average. The skipjack tuna catch for the first 4 months of 1974 was estimated at 650 metric tons, 170 metric tons above the 1973 catch for the same period and 79 metric tons above the long-term average.\nDr. Robert A. Skillman issued the 1974 Hawaiian skipjack tuna catch pre- diction of 3800-4000 metric tons to presage a not particularly good year.\nINFONET TRAINING COURSE HELD AT CENTER\nMr. Ralph Bates, Systems Analyst in charge of the Automatic Data Processing section at the Southwest Fisheries Center, reports that the Center is planning greater utilization of INFONET during FY 75. Under the government's GSA contract, INFONET provides nationwide coverage and national access to common data bases from its computer center in Los Angeles. It is thus possible to initiate processing from one type of terminal while receiving output from another (or several others) of various types. This input/output capability allows the collection of input data and the dissemination of output in the most efficient, cost-effective, and convenient manner.\nMr. Bates said that the group at the Center plans to use two major components of the system facility; namely, GPS and DML. GPS (General Programming System) is tailored to users who are relatively knowledgeable in computing and program development and production processing, as well as advanced problem-solving activities. DML (Data Management Language) provides the type of facilities common to high-level language data management sys- tems. Data banks will be developed using the DML system which will pro- vide easy access of data to develop specific informational requirements .\n24\nERICA\nSTATES OF\nU.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration NATIONAL MARINE FISHERIES SERVICE\nPage 1 of 3 May 1, 1974 Ralph B. Bares\nPROJECT MILESTONES\nFISCAL YEAR 74\nMONTH - >\nMONTH / WEEK\nWEEK->\nAPRIL JUNE JULY 1234 123451234 1234 MAY\nPROJ. TITLE\nMILESTONES\nDR\nSW-01-011 INPUT DATA-GYMNO EXP. -- HUNTER\n.\nRB\nSW-04-031 STD DATA REVISE SYSTEM -- LYNN\n1\n--\n0\nDR\nSW-04-022 ALBACORE LOG DATA -- LAURS\n.\nDR\nSW-06-011 WEATHER DATA-EBER\nDR\nSW-06-041 XBT DATA_REDUCTION -- SAUR\nDR\nSW-11-011 OBSERVER PORPOISE SETS EDIT -- PERRIN\nRB\nSW-11-011 OBSERVER PORPOISE_SETS DATA BASE -PERRIN\nC\nDR\nSW-11-011 OBSERVER PORPOISE SETS REPORTS-PERRIN\nDR\nSW-11-012 OBSERVER MAMMAL SETS EDIT -- PERRIN\nDR\nSW-11-012 OBSERVER MAMMAL SETS REPORTS -- PERRIN\nRB\nSW-11-012 OBSERVER MAMMAL SETS DATA BASE-PERRIN\nRB\nSW-11-013 OBSERVER PORPOISE LIFE HISTORY-PERRIN\nNW\nSW-16-011 20 YEAR CALCOFI DATA BASE SIZED ON\nCARDS FOR 1961-1969\nNW\nSW-16-011 CORRECT ERRORS ON 61-69 DATA BASE\nSTATUS\nSTATUS COMMENTS: 1 -- Schedule revised due to higher priority projects. 2 -- Project completed ahead of schukulo Data Base created on INFONET. 3 -- Initial Reports completed, awaiting additional requirements. 4 -- System re-\nquirements not defined. 5 -- PERT Network of Project SW-16-011 will be developed for all requirements\nMILESTONE LEGEND:\nSTATUS LEGEND:\nPLANNED O REVISED\nCOMPLETED\n4 ON SCHEDULE - MAY SLIP\nBEHIND SCHEDULE\n25\n-04\n--\n0\ni\n1\n..\n..\n-\nMENT OF CC\nBEPAD\nUNITED\nSTATES OF\nU.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration NATIONAL MARINE FISHERIES SERVICE\nPage 2 of 3 May 1, 1974\nRalph B. Bates\nPROJECT MILESTONES\nFISCAL YEAR 74\nMONTH->\nAPRIL JUNE WEEK->| 1| 2|3|4 | |2|3|4| 5| 1| 2|3|4| MAY\nJULY 11 /2/ 3/ 4.\nMONTH / WEEK\nPROJ. TITLE\nMILESTONES\n-\nNW\nSW-16-011 20 YEAR CALCOFT DATA BASE SIZED. ON\nO-\n--\nO\n1-\nNW\nSW-16-011 CORRECT ERRORS ON 51-60 DATA BASE\nO-\nO\n5\nNW\nSW-16-011 CREATE DATA BASE 1951-1969 AND PREPARE\nTABLES 1,2,3,4\n0\nNW\nSW-16-012 20 YEAR CALCOFI UNSIZED & EGGS -- SMITH\nO\n-\nRB\nSW-16-015 20 YEAR CALCOFI REQUIREMENTS-NETWORK\n& PERT CHARTS -- SMITH & HEWITT\nNW\nSW-16-014 CALCOFT PUBLICATIONS 60-69 -- KRAMER\nRB\nSW-17-021 LIBRARY SYSTEMS UCSD -- STAUFFER\nRB\nSW-17-022 INPUT DATA FED-STATE PROGRAM -- STAUFFER .\n7\nNW\nSW-30-061 MAILING LABELS TAGGING PROGRAM -- SQUIRE SW-30-062 SYSTEMS ANALYSIS -- SQUIRE\n8\nRB\nSW-36-011 DATA_ELEMENT/DIRECTORY -- BATES\nRB\nSW-36-012 INFONET DML EDUCATION & EVALUATION\nSTATUS\nSTATUS COMMENTS: 5 -- See PERT Network 6 -- Data Base must be created before Project may begin. 7 -- Additional requirements for this Project were submitted. 8 -- System requirements not defined.\nMILESTONE LEGEND:\nPLANNED O REVISED Ø COMPLETED\nSTATUS LEGEND: < ON SCHEDULE MAY SLIP BEHIND SCHEDULE\n26\nO\n-\n7\n0\nRB\nTAPE FOR 1951-1960 --- SMITH\nHT CI CO\nEs OF\nU.S. DEPARTMENT OF COMMERCE Notionel Cecanie and Atmospheric Administration NATIONAL MARINE FISHERIES SERVICE\nPage 3 of 3 May 1, 1274\nRalph B. Bates\nPROJECT MILESTONES\nFISCAL YEAR 74\nMONTH-\nMONTH WEEK\nAPRIL MAY JUNE JULY WEEK-D1 2 3 4 12 3451234 1234\nPROJ. TITLE\nMILESTONES\nRB\nSW-35-011 BUDGET SYSTEM PROJECT CANCELLED\nRB\nSW-36-014 CATALOG OF PROGRAMS\nRB\nSW-36-015 STANDARD OPERATING PROCEDURES AND SYSTEM/PROGRAM DOCUMENTATION\nRB\nSW-36-016 TEKTRONIX CRT PROPOSAL\nRB\nSW-36-017 SWEG MAILING LISTS\n27\nSTATUS\nSTATUS COMMENTS:\n9 -- Further evaluation and study required.\nMILESTONE LEGEND:\nSTATUS LEGEND:\nPLANNED o\nREVISED 25\nCOMPLETED o\n-\n-\n--\n---\n0\n4 ON SCHEDULE MAY SLIP\nBEHIND SCHEDULE\nA training class was held at the La Jolla Laboratory during the week of April 30 covering the use of GPS and DML, with the following people attending: R. Bates, D. Roll, and N. Wiley of the ADP section, A. Coan, L. Eber, B. Wahlen, and J. Zweifel of the Stock Assessment and Fishery Evaluation Investigation; J. Coe and C. Oliver from the Marine Mammal Investigations. G. Galbraith from NMFS Terminal Island and I. Watkins, Post Office, also attended the INFONET course. Mr. Ken Hutchens of Computer Sciences Corporation was the instructor.\nShown on pages 25, 26, and 27 are the milestone charts for the period April 1974 through June 1974, prepared by Mr. Ralph Bates, Systems Analyst, listing the various ADP projects and their projected schedules.\nPUBLIC AFFAIRS\nSouthwest Fisheries Center Exhibit Aboard Ferry Boat, Berkeley, Opened to Public\nOpened to the public in April, the major exhibit aboard the 76-year-old ferry boat, Berkeley, moored at the San Diego waterfront, is that of the NMFS Southwest Fisheries Center. Created and assembled by Ken Raymond, Scientific Illustrator at the La Jolla Laboratory, the exhibit covers major aspects of the research carried out by the SWFC's Honolulu and La Jolla Laboratories and features model fishing nets, a model of a modern tuna seiner, casts of billfish, yellowfin, skipjack, and albacore tuna, a cut- away model of an expendable bathythermograph, a display of stained, transparent larval and juvenile fish, oceanographic sampling gear, and many other items .\nThe Berkeley, together with the sailing vessels, Medea and Star of India, are floating museums operated by the non-profit Maritime Museum Associa- tion of San Diego. The Berkeley was the second propeller-driven ferryboat on the Pacific Coast and participated in the evacuation of San Francisco following the earthquake and fire of April 18, 1906 when the ferries ran for 24 hours a day, carrying thousands of refugees to the comparative safety of Oakland. The vessel still retains its original 1898 carved wood paneling, plate glass mirrors, and stained-glass windows. Below decks, the original steam engine remains in place and is in operating condition.\nOfficials of the Maritime Museum Association estimate that a million people will view the SWFC exhibit on the Berkeley over the next 5 years.\n28\nApril 3\n- Representing the Honolulu Laboratory Director, Dr. Richard Barkley attended the dedication ceremonies of the Moana Wave at Pier 8 in Honolulu Harbor. The 176-foot Moana Wave is the newest and largest research vessel belonging to the University of Hawaii.\n15 Mr. Izadore Barrett, Deputy Center Director, was the featured speaker at a meeting of the American Cetacean Society at the Scripps Institution of Oceanography, Mr. Barrett discussed \"Dolphins and the tuna industry.\"\n16\n- Laboratory Director Richard Shomura reviewed current management programs in high-seas fisheries for Dr. John Bardach's world-fishery class at the University of Hawaii.\n19\n- Mr. Abramson, Lt. Hornick and Mr. Korn of the Tiburon Fisheries Laboratory talked to a marine biology class from Kennedy High School, Richmond, who visited Tiburon. The class was also given a tour of the Physiology Laboratory .\n24 A NMFS co-sponsored Financial Assistance Seminar was held at the Pagoda Hotel in Honolulu. Mr. Shomura talked during the morning session on an \"Overview of Hawaii's Fisheries.\"\n25 - Chemist Pete Benville of the Tiburon Laboratory presented a talk on environmental careers with the Federal Government at the College of Marin.\nAs it has annually for the past 10 years, the La Jolla Laboratory was host to 26 participants in the 20th Annual Greater San Diego Science and Engineer- ing Fair on April 19. Fishery Biologist David Kramer once again welcomed the young people with a lecture on the work in progress at the laboratory , showed them a film on planktonic life in the sea (to which the SWFC con- tributed footage) and led them on a tour of the laboratory's facilities.\nMr. Izadore Barrett, Deputy Director, served as one of the judges in the Biology Division at this year's Science Fair.\n29\nPress Releases\nThe following press releases were prepared and issued this month by the Southwest Fisheries Center:\nApril 15\n- International Tuna Research Organization Sponsors Annual Tuna Tag Recovery Lottery\n16 - NMFS Physiologist Studies Laboratory-Reared Fish Under Conditions at Sea\nSEMINARS AND LECTURES\nLa Jolla Laboratory\nApril 11\n- Mr. William E. Evans, Naval Undersea Center, discussed \"Recent observations of abundance and distribution of the common dolphin, Delphinus, in the northeastern Pacific.\"\n17 Mr. Jerome Namias, Research Meteorologist, Ocean - Research Division, Scripps Institution of Oceanography , presented a seminar on, \"An eclectic approach to long- range air and sea prediction.\"\nMEETINGS AND TRAVEL\nMarch 29- April 6\n- Dr. Tim Smith of the Marine Mammal Investigations, La Jolla Laboratory, accompanied Mr. J. Blum, Coordinator for Marine Mammals, NMFS, Washington, on a consult- ing assignment to Capetown, South Africa to evaluate status of knowledge for managing fur seal stocks.\nApril 1-4\n- Honolulu Laboratory Director Richard Shomura attended a program review held at the La Jolla Laboratory for Dr. William Royce. While in La Jolla, Mr. Shomura also met with Dr. Royce, Mr. Robert Scott, Dr. Rothschild, Mr. Barrett, Mr. Abramson of the Tiburon Fisheries Laboratory, and senior staff members.\n4-12\n- Dr. William Perrin of the La Jolla Laboratory attended a meeting of the Small Cetaceans Subcommittee of the Scientific Committee of the International Whaling Com- mission meeting in Montreal, Canada, where he presented a working paper on the distribution and differentiation of stocks of Stenella.\n30\nApril 8-9 - Ms. Hazel Nishimura, Librarian at the Honolulu Lab- oratory, attended the Pacific Islands Workshop for College Librarians at the University of Hawaii. This working conference was sponsored by the University's Pacific Islands Studies Program under a grant from the U.S. Office of Education to determine the range of Pacific-related material available in the research libraries of Oahu.\n10\n- Mr. Sus Kato of the Tiburon Laboratory met with Bill Craig of the SW Region to discuss their contribution to the National Fisheries Plan.\n10-11\n- Mr. Shomura participated in a meeting of the Sea Grant Site Visit team at the University of Hawaii. The group reviewed the entire U. H. Sea Grant Program for the coming fiscal year. At an evening executive session they discussed results of the program presentations and developed a set of recommendations. The second morning was devoted to a debriefing session, with feed- back between the panel and the University management team.\n16\n- Dr. Brian Rothschild, accompanied by Mr. Barrett and Mr. Squire of the La Jolla Laboratory, and Mr. Norman Abramson of the Tiburon Laboratory, met with California Department of Fish and Game and NMFS Southwest Region representatives in Long Beach to develop policy guidelines for coordinating CF &G-NMFS present and future efforts on recreational fishing.\n16-17\n- Librarian Ms. Nishimura at Honolulu, attended a 2-day workshop for Health Science Librarians at the Hawaii Medical Library conducted by the Pacific Southwest Regional Medical Library Service and co-sponsored by the Health Information Network of the Pacific (HINOP) . The Honolulu library is a member of HINOP primarily to utilize the inter-library loan services.\n17\n- Mr. Julio Schwarz, City and County Committee on Aging, met with Mr. Shomura to discuss catfish. He was given some literature by the librarian.\n31\nApril 19 - Mr. Pete Benville of the Tiburon Laboratory attended the Hewlett-Packard Seminar on reporting integrators at the University of California Medical School, San Francisco.\n- Mr. Sus Kato of the Tiburon Laboratory attended the Senate hearings on a Bill regarding extended fishery jurisdiction. The hearings were chaired by Senator John Tunney .\n19-20\n- Librarian Ms. Nishimura attended the annual spring conference of the Hawaii Library Association in con- junction with the Hawaii Association of School Librarians and the Special Library Association at the Ala Moana Hotel.\n22\n- A meeting of the U. S. Commissioners of the Inter- American Tropical Tuna Commission (IATTC) was held at the Southwest Fisheries Center auditorium in La Jolla. In attendance from the SWFC were Director Brian J. Rothschild and Dr. William Fox, Leader of the Stock Assessment and Fishery Evaluation Investi- gations at the La Jolla Laboratory. Dr. Fox discussed post-Mexico City alternative management schemes for tuna at the meeting .\n26\nDr. John Maciolek and Mr. Steven Montgomery, the Acting Chairman and Natural Areas Specialist, respectively, of the Natural Area Reserves Commission conferred with Lt. Bruce Crumley, the Honolulu Laboratory-assigned NOAA Corps Officer. At Mr. Shomura's request, Lt. Crumley had prepared a report for the Commission on the problem and possible solution to designation of sea- ward boundaries of the Ahihi-Kinau Natural Reserve Area.\n28\n- Mr. Lloyd Richards of the Tiburon Laboratory departed for Manchester, Washington to observe salmon pen-rearing operations. He will be the primary Tiburon Laboratory participant for the joint NMFS-U.C. Davis Sea Grant - S.F. Tyee Club - California Fish and Game silver salmon rearing project which will take place at Tiburon this summer. Mr. Richards will also be checking some angling facilities in Puget Sound to insure the accuracy of that portion of the Pacific Angler's Guide.\n32\nApril 29-30 - Dr. Michael Laurs, Leader of the Albacore Fishery Investigations at La Jolla attended a meeting of the Pacific Marine Fisheries Commission Albacore Coor- dinating Committee in San Diego April 29-30, where he discussed results of the 1973 joint NMFS-American Fishermen's Research Foundation albacore research studies and plans for further studies in 1974, and the uniform west coast albacore logbook.\n30 The Natural Area Reserves Commission, including Mr. - Shomura who received his appointment to the Commission in March 1974, met at the Honolulu Laboratory.\nVISITORS\nLa Jolla Laboratory\nApril 2\n- Mr. John Mulligan, Tuna Research Foundation, Terminal Island, California.\n16\n- Dr. Michael J. Sanders, Fisheries and Wildlife Division, Melbourne, Vicktoria, Australia.\n24\n- Messrs. Ed Rich and Eric Carson, Peterson Associates, a film-making team, for discussions with Dr. Rothschild and Center staff on their proposed film on tuna distribution, for the Law-of-the-Sea Conference.\n24-26\n- Mr. T.A. Manar, Chief, Scientific Publications Staff, NMFS, Seattle, Washington.\n26\n- Mr. G.V. Howard, Regional Director, SW Region, Terminal Island, California.\n29\n- Dr. Malvern Gilmartin, Hopkins Marine Station, Pacific Grove, California.\nHonolulu Laboratory\nApril 1\n- Mr. John C. Marr, Mardela Fisheries, Honolulu, Hawaii.\n12 - Dr. Oswald Roels, Columbia University and City College of New York, and Mr. Robert Wing, Environmental Research Laboratories, Waltham, Massachusetts.\n33\nApril 16\n- Mr. Richard Kinney, President, Tunaboat Owners Association, accompanying Maire George Pambrun, Ville de Papeete; Mr. Walter T. Watanabe, Operation Manager, Tahiti Tuna Ventures, S.A .; and Mr. Warren Ellacott, Papeete, Tahiti.\nMr. Bob Stark, fisherman, Kodiak, Alaska.\n- Mr. Dan Chang and Mr. Paul Devine, fishermen, Honolulu, Hawaii.\n17 - Ms. Tina Echeverria, Tiburon Fisheries Laboratory .\n18\n-\nMs. Fumiko Hasegawa, Seattle, Washington.\nTiburon Laboratory\nApril 3\n- Clayton Jensen, Deputy Associate Administrator for Environmental Monitoring, NOAA, Rockville, Maryland.\n- John Fageuris, Kaiser Engineers, Oakland, California.\n8\n- Thalia Castro, Ensenada, Mexico\n- Brian James, Scripps Institution of Oceanography, La Jolla, California.\n9\n- Richard Reasoner, San Rafael, California.\n- John Logston, Western Exterminator, Oakland, California.\n11\n- Carl Danneth, Western Exterminator, Oakland, California.\n15 R. Brown, San Francisco Tyee Club, San Francisco, - California.\n16\n- Mr. Robert Crowell, NMFS, Washington, D.C.\n17\n- Marv Frey, Provident Mutual Life, San Rafael, California.\n- S. W. Tyler, Tyler Construction Co. , Santa Rosa, California.\n- Marine Biology Class, Kennedy High School, Richmond, California.\n34\nApril 22\nRichard Asihn, Sippica Corp. , Manor, Massachusetts.\nDaniel Sheehy, University of Rhode Island, Kingston, Rhode Island.\n- Karl Jacque, IBM, Santa Rosa, California.\nDr. Edward Klima, NOAA, Washington, D.C.\n23\n- E. Craig Felber, NMFS, Washington, D.C.\n24\n- Kenneth R. Roberts, NOAA, Washington, D.C.\n- Don Stevens, California Fish & Game, Stockton, California.\n- Phil Swartzell, California Fish & Game, Stockton, California.\n25\n- J. D. Messersmith, California Fish and Game, Sacramento, California.\n- R. W. Marvin, Los Altos, California.\n- M.G. Brown, San Rafael, California.\n- D. Burkhardt, Wang Laboratories, San Mateo, California.\n26 Chris Dewees, et al., University of California, Davis, California.\nPERSONNEL ACTIONS\nApril 2 Bruce Wahlen, Mathematics Technician - - Temporary Appointment - La Jolla\n5\n- Robert Cunningham, Biological Aid, Termination - Lack of Work La Jolla\n- Steven Ahern, Biological Aid, Termination - Lack of Work - La Jolla\n- Donald Hoffman, Biological Aid, Termination - Lack of Work - La Jolla\n35\nr\n.\nApril 8\n- Catherine J.C. Hurst, Clerk (Typing), Reassignment from U.S. Department of Commerce Regional Office - Tiburon\n10\n- Jonathan Halas, Biological Aid, Termination - Lack of Work - La Jolla\n14\n- Dorothy Roll, Computer Programmer, Reassignment - La Jolla\nC\n26\n- Josephine Callahan, Clerk Typist, Resignation - La Jolla\n- Nancy Laytos, Clerk (Typing) , Resignation - Tiburon\nTraining\n1\nApril 23-25 - James Coe, Biological Technician, La Jolla Laboratory , attended the EEO Counseling Course conducted by the Civil Service Commission in Los Angeles, California.\nApril 29- May 3\n- Charles J. Hill, Chief, Support Services, La Jolla Laboratory, attended the Effective Supervision Course conducted by NOAA in Salt Lake City, Utah.\nOL\nON\nBICE\nAN\n1776-1976\n1\n36",
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                    "content": "S",
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                    "content": "SOUTHWEST FISHERIES CENTER",
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                    "content": "MONTHLY REPORT-APRIL 1974",
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                    "content": "Research Highlights",
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                    "content": "Page",
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                {
                    "content": "· NMFS-AFRF Cooperative Albacore-Oceanography Survey",
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                {
                    "content": "to Begin May 28 .",
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                {
                    "content": "3",
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                    "content": "· NMFS/Sea Grant Plans Made for Silver Salmon Rearing at",
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                    "content": "Tiburon Laboratory",
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                    "content": "5",
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                {
                    "content": "·",
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                    "content": "Recreational Fisheries Program Plans Acoustic Tracking",
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                {
                    "content": "of Yellowfin Tuna.",
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                    "content": "6",
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                    "content": ". Scientific Advisory Committee of the Marine Mammal",
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                    "content": "Commission Holds Hearing",
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                    "content": "8",
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                    "content": "· Staff of Marine Mammal Investigations Assembling Material",
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                    "content": "on Porpoise/Tuna Interaction in Preparation of Formal",
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                    "content": "Hearings on Incidental Taking of Marine Mammals",
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                    "content": "9",
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                    "content": ". SWFC Recommends U.S. Submit Two Sets of Tuna Statistics",
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                    "content": "to ICCAT",
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                    "content": "11",
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                    "content": "· Airborne Sea Surface Temperature Surveys Resumed Over",
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                    "content": "San Diego Test Area for 1974 Sport Fishing Season",
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                    "content": "· Retrospective Look at 10-Year Progress of Fish Aquaculture",
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                    "content": "Research at SWFC",
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                    "content": ". Baitfish Transport System Survives Critical First Test with",
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                    "content": "Successful Shipment of Live Anchovies from California to",
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                    "content": "Honolulu.",
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                    "content": "(Showa 48-nendo maguro-rui fuka shi-iku gijutsu kaizen shiken hokoku-sho) .",
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                    "content": "Translation No. 3; available at Southwest Fisheries Center, National Marine",
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                },
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                    "content": "fisheries,",
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                    "content": "concurrent",
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                    "content": "ocean",
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            ],
            "lines": [
                {
                    "content": "By correlating the percent of total West Coast albacore catch taken north",
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                    ]
                },
                {
                    "content": "of San Francisco with the deviations from normal (anomalies) of the environ-",
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                    ]
                },
                {
                    "content": "mental data at 5° latitude-longitude grid points over the 25-year period,",
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                    "content": "features in both the atmospheric circulation and sea surface temperature",
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                {
                    "content": "patterns were found to be significantly related to north-south shifts in the",
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                    ]
                },
                {
                    "content": "center of the albacore fishery .",
                    "polygon": [
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                    "content": "During the summer months of June, July, and August when the fishery is in",
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                    "content": "progress, a northern center of the fishery is associated with above-normal",
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                    "content": "temperatures in the eastern North Pacific east of 150°W longitude and",
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                    "content": "below-normal temperatures in the central and parts of the western North",
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                    "content": "Pacific. The atmospheric circulation pattern associated with a northern",
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                },
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                    "content": "fishery during these months tends toward a ridge in the mid-tropospheric",
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                    "content": "flow that extends over the eastern North Pacific and the North American",
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                    "content": "coastal regions and a trough over the central and western North Pacific.",
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                    "content": "Data from the spring months of March, April, and May preceding the fishing",
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                    "content": "season indicate that a northern fishery tends to follow above normal sea",
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                },
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                    "content": "surface temperatures in the eastern North Pacific east of 135°W and east",
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                    "content": "of 170°W along 20ºN and below normal temperatures over the central and",
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                    "content": "western North Pacific. The correlations also indicate that a ridge in the",
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                    "content": "mid-troposphere over the eastern North Pacific and coastal regions of",
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                    "content": "North America, a trough over the central Pacific and another ridge over the",
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                    "content": "western Pacific is the type of atmospheric flow pattern that tends to precede",
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                    "content": "a northern albacore fishery. It also follows from the correlations that a",
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                    "content": "reversal of these environmental patterns would precede a more southern",
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                    "content": "fishery.",
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                    "content": "In addition to the correlation patterns, regression equations between the",
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                    "content": "percent albacore catch and environmental data were also derived with a",
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                {
                    "content": "multiple regression and screening procedure developed by R. Born of the",
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                },
                {
                    "content": "NORPAX group at Scripps Institution of Oceanography. The results show",
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                    ]
                },
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                    "content": "that the percent of total albacore catch taken north of San Francisco can",
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                    ]
                },
                {
                    "content": "be fairly well \"specified\" from summer environmental data or \"predicted\"",
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                    ]
                },
                {
                    "content": "from spring data using a three-term linear regression equation, at least",
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                },
                {
                    "content": "over the dependent data period.",
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                    ]
                },
                {
                    "content": "NMFS-AFRF Cooperative Albacore-Oceanography Survey to Begin",
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                },
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                    "content": "May 28",
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                    ]
                },
                {
                    "content": "Preparations for a cooperative albacore-oceanography survey with the",
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                    ]
                },
                {
                    "content": "American Fishermen's Research Foundation (AFRF) are underway. The NOAA",
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                    ]
                },
                {
                    "content": "research vessel, David Starr Jordan, and five jig-fishing vessels on charter",
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                },
                {
                    "content": "to the AFRF will conduct joint operations, May 28 through July 6 in the",
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                    ]
                },
                {
                    "content": "offshore distribution of albacore, their migration into the nearshore fisheries,",
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                    ]
                },
                {
                    "content": "and the concurrent developments in the ocean environment.",
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                {
                    "content": "3",
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        },
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                    "content": "by both private and salmon growers and NMFS (NW Region and Pacific Food",
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                    "content": "Products Technology Laboratory (PFPTL)), Seattle, Washington. About a",
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                    "content": "using methods developed by John Spinelli of PFPTL. This consists of using",
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                    "content": "a carrier such as wheat middlings or mill run wheat. Additionally some red",
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                    "content": "crabs were dried under a high vacuum without a carrier. The samples were",
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                    "content": "sent to Spinelli for analysis of carotenoid pigments.",
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                    "content": "Angler's Guide to the U. S. Pacific Coast in Preparation",
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                    "content": "Ms. Susan Smith, Publications Specialist at Tiburon Laboratory, reported",
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                    "content": "that she met with the co-author, James Squire of the La Jolla Laboratory",
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                    "content": "to review in detail the southern California, Washington, and Oregon sections",
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                    "content": "of the Angler's Guide to the U. S. Pacific Coast. The authors found data",
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                    "content": "for a few sections of the coast were incomplete, particularly the Puget Sound",
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                    "content": "area. Mr. L. Richards, who is now in the Puget Sound area gathering in-",
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                    "content": "formation for Tiburon Laboratory's pen-reared salmon project, was asked",
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                    "content": "to obtain some of this information during his week-long stay there.",
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                    "content": "On April 14, an article featuring the Guide appeared in the Sunday supple-",
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                    "content": "ment section of the San Francisco Chronicle/Examiner. A good amount of",
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                    "content": "favorable comments and requests for copies of the Guide have been received",
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                    "content": "as a result of publication of the article.",
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                    "content": "FISH ENVIRONMENT INVESTIGATIONS",
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                    "content": "Recreational Fisheries Program Plans Acoustic Tracking of",
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                    "content": "Yellowfin Tuna",
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                    "content": "A popular recreational fishing area for yellowfin tuna is off the leeward",
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                    "content": "coast of Oahu. Arrangements have been made by Fishery Biologist Heeny",
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                    "content": "lation system was received and has been incorporated into the system.",
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                    "content": "Construction is now complete except for installation of the heater-switching",
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                    "content": "sea water (17 and 34% salinity) . The fish died, however, before tests",
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                    "content": "tation rate increases with age, indicating that while the average length of",
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                    "content": "cycle remains about the same, calvings decrease and lactation lengthens .",
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                    "content": "Mortality rates have not yet been estimated.",
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                    "content": "As part of the expanded porpoise investigations at the La Jolla Laboratory,",
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                    "content": "trained observers are sent to sea on tuna seiners of the U. S. fleet to collect",
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                    "content": "vital information on porpoise life history and mortality, and to observe the",
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                    "content": "operation of porpoise-saving gear and techniques. Thus far 27 observer",
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                    "content": "Presently eight observers are still at sea, all except one on their second",
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                    "content": "trips of the 1974 yellowfin tuna fishing season.",
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                    "content": "final determination to send these observers depends on such factors as",
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                    "content": "The project, which is a cooperative effort of the Southwest Fisheries Center",
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                    "content": "engined Beechcraft aircraft equipped with precision infrared radiometer.",
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                    "content": "This will be the third and final year of such surveys, which are conducted",
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                    "content": "during the peak fishing period, April through October.",
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                    "content": "the results of these surveys isotherm charts were drawn and distributed",
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                    "content": "and the trend in billfish catches for the important fishing areas in the Pacific.",
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                    "content": "The maturation and spawning of striped bass in sea water and the acclimation",
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                    "content": "of its eggs and larvae to sea water suggests that a sea water hatchery for",
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                    "content": "this species may be possible where fresh water is at a premium, as in",
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                    "content": "southern California. Work on striped bass at the Southwest Fisheries",
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                    "content": "Center is a collaborative effort between the Inland Fisheries Branch of the",
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                    "content": "California Department of Fish and Game and the La Jolla Laboratory.",
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                    "content": "Chlorophyll-Maximum Layer Re-established After Storm",
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                    "content": "Dr. Reuben Lasker, Leader of the Stock and Recruitment Investigations,",
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                    "content": "continued his work at sea this month to determine if the chlorophyll-maximum",
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                    "content": "layers inshore continue to be good feeding grounds for first-feeding anchovy",
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                    "content": "larvae. Using cultured larvae from laboratory-spawned eggs, Dr. Lasker",
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                    "content": "a weekend and all the fish were lost. The tank and fish have since been",
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                    "content": "replaced and steps are being taken to prevent a recurrence of the accident.",
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                    "content": "this was due to inadequate sperm or fouling of the tank which occurred",
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                    "content": "in the handbook of early life history stages of fishes of the California",
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                    "content": "Current. Mr. Henry Orr, Office Draftsman, completed illustrations for",
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                    "content": "in the handbook, as well as making morphometric measurements and meristic",
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                    "content": "counts on selected specimens, and selecting series for illustration. Ms.",
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                    "content": "off the Hawaiian Islands and participated in Dr. Ahlstrom's 6-week larval",
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                    "content": "Work has also continued in assembling data for a manuscript dealing with",
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                    "content": "midwater trawl collections made on extended CalCOFI Cruises 7205 and",
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                    "content": "7210. Mr. John Butler is working with Dr. Ahlstrom at La Jolla on this",
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                    "content": "Dr. Ahlstrom was able to devote several days this month to work on a",
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                    "content": "manuscript dealing with the life history of the northern anchovy, a coop-",
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                    "content": "erative study with Fishery Biologists D. Kramer and R. Counts.",
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                    "content": "24-26, was to obtain length-weight relationships for certain species of",
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                    "content": "rockfishes (Sebastes) . Fishing was carried out on Sixty-Mile Bank at",
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                    "content": "on April 26. According to Dr. G. Moser, Fishery Biologist at the La Jolla",
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                    "content": "prising six species were taken on April 26. All specimens were measured,",
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                    "content": "weighing of the fish was precluded by rough seas.",
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                    "content": "Dr. Moser also reports that he has made progress on the identification",
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                    "content": "guide to scorpion fish larvae of the eastern Pacific, and this section on",
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                    "content": "the rockfishes is nearing completion. A series of Sebastes marinus, the",
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                    "content": "Atlantic redfish was sent to Dr. Moser by the NMFS Laboratory at Narragansett",
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                    "content": "and has enabled him to make a comparison of larvae of Sebastes from both",
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                    "content": "the Atlantic and Pacific Oceans.",
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                    "content": "Dr. C.O'Connell, Fishery Biologist at the La Jolla Laboratory reports that",
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                    "content": "studies of the effects of starvation on anchovy larvae continued this month",
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                    "content": "with preparation of specimens from a number of laboratory trials for histological",
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                    "content": "examination. In the most recent of these trials close to 500 larvae were re-",
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                    "content": "trieved by harvesting the entire living population of one food treatment and",
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                    "content": "one no-food treatment container on each of 10 successive days following",
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                    "content": "hatching. While mortality increased slightly on day 9 in the presence of",
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                    "content": "food, it was almost total on day 8 in the absence of food. The range of",
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                    "content": "standard lengths was considerable from all containers, but whereas average",
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                    "content": "length increased steadily throughout in the presence of food, it declined",
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                    "content": "steadily after day 5 in the absence of food.",
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                    "content": "Specimens from the latter trial will be processed in small groups to pursue",
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                    "content": "speeds adequate to support ram gill ventilation. Results with three half-",
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                    "content": "moons, Medialuna californiensis, and two jack mackerels, Trachurus",
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                    "content": "water at 170-18℃ for the effect to be seen.",
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                    "content": "NMFS, Woods Hole, showed that high temperature stress at sub-lethal to",
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                    "content": "lethal levels induces only slight increases in the transition speed for ram",
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                    "content": "He suggests, on the other hand, that flow detection in the bronchial chamber",
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                    "content": "ventilation in fish.",
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                    "content": "SURVEY SYSTEMS ANALYSIS INVESTIGATIONS",
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                    "content": "Results of Sonar Cruises Indicate Probability of Low Relationship",
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                    "content": "and would necessitate a three-to-four fold increase in inshore sampling .",
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                    "content": "of eggs after a given time interval(s) .",
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                    "content": "TUNA ASSESSMENT AND DEVELOPMENT INVESTIGATIONS",
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                    "content": "at",
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                    "content": "A site was chosen at the dock of Battelle Columbus Laboratories both for",
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                    "content": "its security and proximity to the allegedly cleaner waters of outer Long",
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                    "content": "Beach Harbor. The first experiment ended with about 95% mortality in 3",
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                    "content": "days of testing on the open system. Three things seemed probable causes",
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                    "content": "for the failure: 1) the pump that was rented for this test on the basis of",
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                    "content": "its advertised specifications of 275 gallons per minute at our operating",
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                    "content": "head actually delivered 100 gallons per minute or less; 2) the amount of",
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                    "content": "fish in the tank was estimated at 600 pounds, but after weighing the fish",
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                    "content": "at the completion of the experiment it was discovered that actually about",
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                    "content": "1,200 pounds had been loaded; and 3) according to later reports from a",
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                    "content": "unusual water quality problems in Long Beach Harbor during that period.",
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                    "content": "For the second experiment another pump delivering 200 gallons per minute",
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                    "content": "5 pounds of which died in the first and second days, 71 pounds the third",
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                    "content": "day, and 21 pounds the fourth day, giving an overall total mortality of 36% .",
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                    "content": "A third lot of baitfish, estimated at 550 pounds, was loaded in the tank on",
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                    "content": "the morning of April 16 for shipment to Honolulu on the morning of the 18th.",
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                    "content": "Forty pounds of fish had died by the next afternoon and were siphoned out.",
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                    "content": "time, so the fish were subjected to much moving about to temporary loca-",
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                    "content": "tions at five hydrants during the loading of the Matsonia, and were on the",
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                    "content": "closed system for several hours. When they arrived in Honolulu at 0730,",
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                    "content": "March 22, they were taken to the Kewalo facility and unloaded into a 13,000-",
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                    "content": "gallon plastic holding tank with a sea water supply of 60 gallons per minute.",
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                    "content": "Fifty-one pounds of dead fish were removed, an additional 46 pounds having",
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                    "content": "been removed during the crossing by Mr. Gooding, who accompanied them.",
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                    "content": "The remaining fish are still alive and so the original estimate as to the",
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                    "content": "amount carried has not yet been verified.",
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                    "content": "A discharge system designed to remove dead fish continuously while the",
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                    "content": "tank is on open circulation is now being installed. Also, a new tank",
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                    "content": "draining system with a 4-inch valve and hose is being installed. The new",
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                    "content": "drain may also serve as a live fish unloading system. These preparations",
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                    "content": "for the May trip are being made by Messrs. Aasted, Gooding, and Kazama",
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                    "content": "at Honolulu",
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                    "content": "summaries on the state of the fishery, the Honolulu Laboratory will investi-",
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                },
                {
                    "content": "gate the possibility of providing them, taking into consideration our reduced",
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                    "content": "support staff and the workload involved. Keypunching of the logbooks is",
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                    "content": "continuing and, upon completion, the final, detailed catch-effort reports",
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                    "content": "will be computed as in the past.",
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                    "content": "Slim April Catch of Skipjack Tuna in Hawaiian Fishery",
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                    "content": "output from another (or several others) of various types. This input/output",
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                    "content": "A training class was held at the La Jolla Laboratory during the week of",
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                    "content": "April 30 covering the use of GPS and DML, with the following people",
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                    "content": "attending: R. Bates, D. Roll, and N. Wiley of the ADP section, A. Coan,",
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                    "content": "L. Eber, B. Wahlen, and J. Zweifel of the Stock Assessment and Fishery",
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                    "content": "Evaluation Investigation; J. Coe and C. Oliver from the Marine Mammal",
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                    "content": "Investigations. G. Galbraith from NMFS Terminal Island and I. Watkins,",
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                    "content": "Post Office, also attended the INFONET course. Mr. Ken Hutchens of",
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                    "content": "Computer Sciences Corporation was the instructor.",
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                    "content": "1974 through June 1974, prepared by Mr. Ralph Bates, Systems Analyst,",
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                    "content": "PUBLIC AFFAIRS",
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                    "content": "Southwest Fisheries Center Exhibit Aboard Ferry Boat, Berkeley,",
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                    "content": "Laboratories and features model fishing nets, a model of a modern tuna",
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                    "content": "away model of an expendable bathythermograph, a display of stained,",
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                    "content": "transparent larval and juvenile fish, oceanographic sampling gear, and",
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                    "content": "many other items .",
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                    "content": "are floating museums operated by the non-profit Maritime Museum Associa-",
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                    "content": "following the earthquake and fire of April 18, 1906 when the ferries ran for",
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                    "content": "Montreal,",
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                    "content": "Canada,",
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                {
                    "content": "Stenella.",
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                    "content": "30",
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                    "content": "The following press releases were prepared and issued this month by the",
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                    "content": "Southwest Fisheries Center:",
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                    "content": "April 15",
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                    "content": "-",
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                    "content": "International Tuna Research Organization Sponsors",
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                {
                    "content": "Annual Tuna Tag Recovery Lottery",
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                    "content": "-",
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                {
                    "content": "NMFS Physiologist Studies Laboratory-Reared Fish",
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                    "content": "Under Conditions at Sea",
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                    "content": "SEMINARS AND LECTURES",
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                    "content": "La Jolla Laboratory",
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                    "content": "April 11",
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                    "content": "-",
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                    "content": "Mr. William E. Evans, Naval Undersea Center, discussed",
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                            "offset": 68102,
                            "length": 57
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                    ]
                },
                {
                    "content": "common dolphin, Delphinus, in the northeastern Pacific.\"",
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                    "content": "17",
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                    "content": "Mr. Jerome Namias, Research Meteorologist, Ocean",
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                    "content": "-",
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                    "content": "Research Division, Scripps Institution of Oceanography ,",
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                    "content": "presented a seminar on, \"An eclectic approach to long-",
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                {
                    "content": "range air and sea prediction.\"",
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                    "content": "MEETINGS AND TRAVEL",
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                    "content": "March 29-",
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                {
                    "content": "April 6",
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                            "offset": 68444,
                            "length": 7
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                },
                {
                    "content": "-",
                    "polygon": [
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                            "length": 1
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                    ]
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                    "content": "Dr. Tim Smith of the Marine Mammal Investigations,",
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                {
                    "content": "La Jolla Laboratory, accompanied Mr. J. Blum, Coordinator",
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                {
                    "content": "for Marine Mammals, NMFS, Washington, on a consult-",
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                {
                    "content": "ing assignment to Capetown, South Africa to evaluate",
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                    "content": "status of knowledge for managing fur seal stocks.",
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                    "content": "April 1-4",
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            "content": "STATES OF A"
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            "content": "HONOLULU"
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            "content": "LA JOLLA"
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            "content": "TIBURON"
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            "content": "S"
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            "content": "SOUTHWEST FISHERIES CENTER"
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                    "length": 25
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            ],
            "content": "MONTHLY REPORT-APRIL 1974"
        },
        {
            "spans": [
                {
                    "offset": 120,
                    "length": 24
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            ],
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            ],
            "content": "Research Highlights Page"
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        {
            "spans": [
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                    "offset": 145,
                    "length": 72
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                }
            ],
            "content": "· NMFS-AFRF Cooperative Albacore-Oceanography Survey to Begin May 28 . 3"
        },
        {
            "spans": [
                {
                    "offset": 218,
                    "length": 77
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            ],
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            ],
            "content": "· NMFS/Sea Grant Plans Made for Silver Salmon Rearing at Tiburon Laboratory 5"
        },
        {
            "spans": [
                {
                    "offset": 296,
                    "length": 77
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            ],
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            ],
            "content": "· Recreational Fisheries Program Plans Acoustic Tracking of Yellowfin Tuna. 6"
        },
        {
            "spans": [
                {
                    "offset": 374,
                    "length": 79
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            ],
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                }
            ],
            "content": ". Scientific Advisory Committee of the Marine Mammal Commission Holds Hearing 8"
        },
        {
            "spans": [
                {
                    "offset": 454,
                    "length": 163
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            ],
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            ],
            "content": "· Staff of Marine Mammal Investigations Assembling Material on Porpoise/Tuna Interaction in Preparation of Formal Hearings on Incidental Taking of Marine Mammals 9"
        },
        {
            "spans": [
                {
                    "offset": 618,
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            ],
            "content": ". SWFC Recommends U.S. Submit Two Sets of Tuna Statistics to ICCAT 11"
        },
        {
            "spans": [
                {
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                    "length": 108
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            ],
            "content": "· Airborne Sea Surface Temperature Surveys Resumed Over San Diego Test Area for 1974 Sport Fishing Season 14"
        },
        {
            "spans": [
                {
                    "offset": 797,
                    "length": 80
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            ],
            "content": "· Retrospective Look at 10-Year Progress of Fish Aquaculture Research at SWFC 15"
        },
        {
            "spans": [
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                    "offset": 878,
                    "length": 128
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            ],
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            ],
            "content": ". Baitfish Transport System Survives Critical First Test with Successful Shipment of Live Anchovies from California to Honolulu."
        },
        {
            "spans": [
                {
                    "offset": 1007,
                    "length": 9
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            ],
            "content": "NOAA/NMFS"
        },
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            "spans": [
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                    "offset": 1017,
                    "length": 2
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            "content": "21"
        },
        {
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                    "length": 107
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            ],
            "content": "SOUTHWEST FISHERIES CENTER, LA JOLLA, CALIFORNIA HONOLULU LABORATORY LA JOLLA LABORATORY TIBURON LABORATORY"
        },
        {
            "spans": [
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                    "length": 25
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            ],
            "content": "MONTHLY REPORT-APRIL 1974"
        },
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            "content": "PAPERS PUBLISHED"
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            ],
            "content": "Benville, Pete Jr. and Sid Korn. 1974. A simple apparatus for metering volatile liquids into water. J. Fish. Res. Board Can. 31(3): 367-368."
        },
        {
            "spans": [
                {
                    "offset": 1312,
                    "length": 12
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            ],
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            "content": "Translations"
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                    "length": 504
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            ],
            "content": "Kikawa, Shoji. 1971. Shunyo Maru's third bait survey in the Papua New Guinea area (Shunyo Maru ni yoru dai-san-ji Papua New Guinea jiryogyo chosa) . Proceedings of the 1970 Japanese Tuna Fishery Research Conference, Shimizu, Japan, February 3-5, 1971, p. 255-262. Fisheries Agency of Japan, Far Seas Fisheries Research Laboratory. (Translated from Japanese by T. Otsu, 1974, 10 p. , Translation No. 2; available at Southwest Fisheries Center, National Marine Fisheries Service, NOAA, Honolulu, HI 96812.)"
        },
        {
            "spans": [
                {
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                    "length": 570
                }
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                }
            ],
            "content": "Kinki University Fishery Experimental Station. 1974. Artificial fertilization and rearing experiments conducted on tunas in 1973. . . A progress report (Showa 48-nendo maguro-rui fuka shi-iku gijutsu kaizen shiken hokoku-sho) . Preliminary progress report prepared for a special meeting of cooperating agencies working on tuna culture research, Shimizu, Japan, February 26, 1974, 23 p. (Mimeogr.) (Translated from Japanese by T. Otsu, 1974, 18 p. , Translation No. 3; available at Southwest Fisheries Center, National Marine Fisheries Service, NOAA, Honolulu, HI 96812.)"
        },
        {
            "spans": [
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            ],
            "content": "Suisan Sekai. 1973. This year's saury (Cololabis saira) landings result in both joy and sorrow (Hiki komogomo kotoshi no sanma ryo) . Suisan Sekai (22(11): 32-43. (Translated from Japanese of selected highlights by T. Otsu, 1974, 11 p., Translation No. 1; available at Southwest Fisheries Center, National Marine Fisheries Service, NOAA, Honolulu, HI 96812.)"
        },
        {
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            "content": "This report does not constitute publication and is for information only ."
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            ],
            "content": "NMFS LABORATORY AT TIBURON TO BECOME PART OF SOUTHWEST FISHERIES CENTER"
        },
        {
            "spans": [
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            ],
            "content": "The NMFS Tiburon Laboratory which formerly reported to the Southwest Regional Office in Terminal Island, will become a part of the Southwest Fisheries Center next month, according to Dr. B. J. Rothschild, Center Director. This arrangement, originally recommended by the Blue Ribbon Committee on NMFS Organization, has been cleared by the appropriate NOAA and NMFS officials and cleared in concept by the NOAA Administrator, Dr. White. The target date of May 12 has been established for documenting the required organizational changes in the NOAA/Dept. of Commerce ad- ministrative systems."
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            "content": "Dr. Rothschild explained that the recommended arrangement would achieve more effective coordination of research among Fisheries Centers and lab- oratories, and is consistent with the intent of establishing Centers having the capacity to strengthen the management, coordination, and planning of the resource research through broad ecological zones. The Southwest Fisheries Center reports organizationally to the Associate Director of Resource Research in Washington, D.C."
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            "content": "The Tiburon Laboratory, which occupies several buildings at a former Navy installation in the Tiburon Peninsula, has a staff of 23, headed by Acting Director Norman Abramson. Scientists at Tiburon conduct a range of re- search related to coastal California fishes, their ecological relationships, and their associated recreational and commercial fisheries. Also carried out at the Tiburon Laboratory is pollutant research which involves studying the physiological effects of pollutants on fishes as well as researching the physical processes which determine the distribution and concentration of pollutants in the coastal zone."
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            "content": "ALBACORE FISHERY INVESTIGATIONS"
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            "content": "Statistical Examination of Relationships Between Environmental Variables and Geographical Distribution of West Coast Albacore Fishery Completed"
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            "content": "As part of the continuing study on the influence of inter-annual environ- mental fluctuations on the North American West Coast albacore fishery, Dr. N. Clark, Meteorologist at the La Jolla Laboratory, has completed a statistical examination of relationships between large-scale patterns of mid-tropospheric atmospheric flow (at about 10,000 feet) and sea surface temperatures over the entire North Pacific and the yearly changes in the center of the albacore fishery along the coast over a 25-year period, 1948-72."
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            "content": "By correlating the percent of total West Coast albacore catch taken north of San Francisco with the deviations from normal (anomalies) of the environ- mental data at 5° latitude-longitude grid points over the 25-year period, features in both the atmospheric circulation and sea surface temperature patterns were found to be significantly related to north-south shifts in the center of the albacore fishery ."
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            "content": "During the summer months of June, July, and August when the fishery is in progress, a northern center of the fishery is associated with above-normal temperatures in the eastern North Pacific east of 150°W longitude and below-normal temperatures in the central and parts of the western North Pacific. The atmospheric circulation pattern associated with a northern fishery during these months tends toward a ridge in the mid-tropospheric flow that extends over the eastern North Pacific and the North American coastal regions and a trough over the central and western North Pacific."
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            "content": "Data from the spring months of March, April, and May preceding the fishing season indicate that a northern fishery tends to follow above normal sea surface temperatures in the eastern North Pacific east of 135°W and east of 170°W along 20ºN and below normal temperatures over the central and western North Pacific. The correlations also indicate that a ridge in the mid-troposphere over the eastern North Pacific and coastal regions of North America, a trough over the central Pacific and another ridge over the western Pacific is the type of atmospheric flow pattern that tends to precede a northern albacore fishery. It also follows from the correlations that a reversal of these environmental patterns would precede a more southern fishery."
        },
        {
            "spans": [
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            ],
            "content": "In addition to the correlation patterns, regression equations between the percent albacore catch and environmental data were also derived with a multiple regression and screening procedure developed by R. Born of the NORPAX group at Scripps Institution of Oceanography. The results show that the percent of total albacore catch taken north of San Francisco can be fairly well \"specified\" from summer environmental data or \"predicted\" from spring data using a three-term linear regression equation, at least over the dependent data period."
        },
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            "content": "NMFS-AFRF Cooperative Albacore-Oceanography Survey to Begin May 28"
        },
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            ],
            "content": "Preparations for a cooperative albacore-oceanography survey with the American Fishermen's Research Foundation (AFRF) are underway. The NOAA research vessel, David Starr Jordan, and five jig-fishing vessels on charter to the AFRF will conduct joint operations, May 28 through July 6 in the offshore distribution of albacore, their migration into the nearshore fisheries, and the concurrent developments in the ocean environment."
        },
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            "content": "3"
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            "content": "Results of surveys conducted in this region during 1972 and 1973 showed that the concentrations of albacore associated with the Transition Zone and its southern boundary migrated to the central and southern California fisheries. The effort during the upcoming survey will be concentrated upon examining the migration paths of albacore into the northern albacore fishery. Dr. Michael Laurs, Leader of the Albacore Fishery Investigations and Mr. R. Lynn who will be the cruise leader on the forthcoming cruise, have com- pleted plans and arrangements with AFRF."
        },
        {
            "spans": [
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            ],
            "content": "COASTAL FISH COMMUNITIES INVESTIGATIONS"
        },
        {
            "spans": [
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            ],
            "content": "Under the leadership of Dr. E. Hobson, Fishery Biologist at the Tiburon Laboratory, the staff of this investigation describes and analyzes eco- systems associated with coastal fish communities. Currently fish com- munities occupying California kelp beds are being studied. Species occupying this environment constitute some of the most important recre- ational varieties and their associated prey. Site of the actual research conducted is the Santa Catalina Marine Biological Laboratory at Santa Catalina Island."
        },
        {
            "spans": [
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            ],
            "content": "Ecology of Kelp Bed Fishes Studied"
        },
        {
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                }
            ],
            "content": "This month, Dr. Hobson, working with Fishery Biologist Tony Chess, reports that quarterly monitoring of the biota along the transect line running through the Lion's Head kelp bed at Catalina Island has continued to indicate a loss of Macrocystis plants in the shoreward part of that bed. Along with the loss of surface canopy there, and the resulting increase in sunlight on the sea floor, there has been increasing growth of low benthic algae, especially Pterocladia. With this have appeared several fishes that live associated with these algae, notably the blenny Gibbonsia elegans, and the cottid Orthonopias triacis. These fishes have largely replaced here the goby Lythrypnus dalli, which lives on these same rocks when they lay bare under the shade of the Macrocystis."
        },
        {
            "spans": [
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            ],
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                }
            ],
            "content": "A specimen of the serranid Anthias gordensis was collected during regular sampling at ship rock, which is the first record of this species in California. A tropical species, it was previously unknown along the Pacific coast north of Cape San Lucas, Mexico."
        },
        {
            "spans": [
                {
                    "offset": 10237,
                    "length": 284
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            ],
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                }
            ],
            "content": "Arrangements were completed for Dr. William MacFarland, Cornell University to work with Dr. Hobson and Mr. Chess next month. Plans are to integrate Dr. MacFarland's study of visual pigments and the characteristics of light underwater into a segment of the on-going NMFS investigation."
        },
        {
            "spans": [
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                    "offset": 10522,
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            "content": "4"
        },
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            ],
            "content": "COASTAL FISHERIES INVESTIGATIONS"
        },
        {
            "spans": [
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                    "offset": 10557,
                    "length": 928
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            ],
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            ],
            "content": "Under the leadership of Mr. Norman Abramson, Fishery Biologist and Acting Laboratory Director, this investigation encompasses all activities at the Tiburon Laboratory related to the coastal fisheries of California. These include, or may include, stock assessment, gear efficiency evaluation, fishery resource utilization improvements, and descriptive accounts of fishes and their associated fisheries. Both recreational and commercial fisheries are covered by the Investigation. Present activities include work on developing management strategies for some migratory game fishes, the development of commercial fisheries on underutilized resources, and prep- aration of the Pacific Angler's Guide. The latter provides a description of recreational fishes and their associated fisheries of the Pacific Coast of the United States, Hawaii, Guam, and American Samoa, to stimulate in- creased utilization of the recreational resources."
        },
        {
            "spans": [
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                    "offset": 11486,
                    "length": 36
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            ],
            "content": "Plans Made for Silver Salmon Rearing"
        },
        {
            "spans": [
                {
                    "offset": 11523,
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            ],
            "content": "Acting Director Abramson and Mr. L. Richards, Fishery Biologist at the Tiburon Laboratory participated in several meetings with UC, Davis and San Francisco Tyee Club members during the month on logistics for the experimental rearing in sea water of silver salmon, during a 6-month period. Mr. Abramson reports that a portion of the materials for pen construction were delivered and the pen should be built and installed before the end of May, when 8,000 silver salmon smolts will be placed in the pen."
        },
        {
            "spans": [
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            ],
            "content": "Progress Made in Fishery Development"
        },
        {
            "spans": [
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                }
            ],
            "content": "Fishery Biologist Susumu Kato at the Tiburon Laboratory is in charge of developing fisheries for underutilized species. This month he reported the following progress in the red crab and sea urchin fisheries, both under- utilized marine resources."
        },
        {
            "spans": [
                {
                    "offset": 12309,
                    "length": 652
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            ],
            "content": "With the aid of Dr. Peter Lerke of the National Canners Association in Berkeley, 10 pounds of cooked sea urchin roe were packed in 1/2-pound cans. The roe was provided by the Southern California Trading Corporation. The product was markedly different from Japanese canned sea urchin roe. Ours was much softer and the color was duller. Samples sent to Japan were inspected by some buyers, and all agreed that our methods need to be im- proved. Although our product was runnier, the moisture content was 64.5 percent; the Japanese canned roe had a moisture content of 66 percent. Although not indicated on the label, it is suspected that the Japanese use"
        },
        {
            "spans": [
                {
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                    "length": 1
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            "content": "5"
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            "spans": [
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            ],
            "content": "vegetable gum or other hardening agent to solidify the roe. A good market is available for canned roe if an acceptable product can be produced here. Production of canned roe would be a good alternative to fresh roe in the summer months when prices for the latter are low. Most of the California processors have suspended operations or are limiting production of fresh roe until fall."
        },
        {
            "spans": [
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            ],
            "content": "The fishing vessel Lady Olga left San Diego on April 10 on her fourth red crab trip. The catch was sold in advance to a salmon-rearing firm in the Northwest. Processing and feeding experiments are being conducted by both private and salmon growers and NMFS (NW Region and Pacific Food Products Technology Laboratory (PFPTL)), Seattle, Washington. About a hundred pounds of red crabs were processed by a firm in South San Francisco, using methods developed by John Spinelli of PFPTL. This consists of using a carrier such as wheat middlings or mill run wheat. Additionally some red crabs were dried under a high vacuum without a carrier. The samples were sent to Spinelli for analysis of carotenoid pigments."
        },
        {
            "spans": [
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            ],
            "content": "Angler's Guide to the U. S. Pacific Coast in Preparation"
        },
        {
            "spans": [
                {
                    "offset": 14113,
                    "length": 585
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            ],
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            ],
            "content": "Ms. Susan Smith, Publications Specialist at Tiburon Laboratory, reported that she met with the co-author, James Squire of the La Jolla Laboratory to review in detail the southern California, Washington, and Oregon sections of the Angler's Guide to the U. S. Pacific Coast. The authors found data for a few sections of the coast were incomplete, particularly the Puget Sound area. Mr. L. Richards, who is now in the Puget Sound area gathering in- formation for Tiburon Laboratory's pen-reared salmon project, was asked to obtain some of this information during his week-long stay there."
        },
        {
            "spans": [
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            ],
            "content": "On April 14, an article featuring the Guide appeared in the Sunday supple- ment section of the San Francisco Chronicle/Examiner. A good amount of favorable comments and requests for copies of the Guide have been received as a result of publication of the article."
        },
        {
            "spans": [
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            "content": "FISH ENVIRONMENT INVESTIGATIONS"
        },
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            ],
            "content": "Recreational Fisheries Program Plans Acoustic Tracking of Yellowfin Tuna"
        },
        {
            "spans": [
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            ],
            "content": "A popular recreational fishing area for yellowfin tuna is off the leeward coast of Oahu. Arrangements have been made by Fishery Biologist Heeny Yuen, leader of the Recreational Fisheries Program at the Honolulu Laboratory"
        },
        {
            "spans": [
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            "content": "6"
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        {
            "spans": [
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            ],
            "content": "to study the movements of the yellowfin tuna in the area by tracking them with an acoustic system. Fishery Biologist Andrew Dizon and Fishery Aid Elliott Kawahara made a couple of functional tags, but these remain to be field tested. Testing awaits the arrival of a transducer-receiver from La Jolla. The transducer in turn is awaiting the delivery of a housing unit caught in the Canadian postal strike. A delay in the delivery of a few parts is holding up further production of tags."
        },
        {
            "spans": [
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            ],
            "content": "Data processing for the Honolulu Laboratory's commitment to the Hawaii Water Resources Regional Study is all but completed. The report, which is to describe the marine resources and habitats of the coastal waters of the State of Hawaii, has been outlined."
        },
        {
            "spans": [
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            ],
            "content": "Mr. Yuen has completed the first draft of a paper \"Desired characteristics of a bait for skipjack tuna\" for the baitfish workshop to be held at the Honolulu Laboratory in early June of this year."
        },
        {
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            ],
            "content": "Mr. Yuen, who has the responsibility for coordinating NMFS participation in Makahiki Kai (The Sea and Me) , an ocean-oriented collection of exhibits organized by Sea Grant, reported that Scientific Illustrator Tamotsu Nakata and Mr. Kawahara devoted time this month to preparation of the Honolulu Laboratory's display ."
        },
        {
            "spans": [
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            ],
            "content": "Behavioral Thermoregulation System Acquires Refrigeration Unit"
        },
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            "spans": [
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            "content": "During the past month, the refrigeration unit for the tuna behavioral regu- lation system was received and has been incorporated into the system. Construction is now complete except for installation of the heater-switching assembly. The development of this system is spearheaded by Drs. William H. Neill and Andrew E. Dizon, Fishery Biologists with the Life Studies, Tuna and Tunalike Fishes Program at Honolulu. It is a unique apparatus for the study of tuna behavior in temperature gradients like those in the open ocean, and consists of a doughnut-shaped tank (8,000 liters) wherein the temperature is controlled automatically by the direction and speed of the tuna swimming in its circular channel. The tuna regulates the temper- ature of the tank by reversals in swimming direction and thereby communi- cates its temperature preference to the researchers. Anticipated results of these studies include the tunas' preferred temperatures, a set of parameters with high potential value in predicting tuna distribution in the ocean."
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            "content": "7"
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            "content": "Orientation and Regulatory Responses of Kawakawa to Food Gradients in Doughnut Tank Noted"
        },
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            "content": "Drs. Neill and Dizon have begun a series of experiments, carried out in the doughnut tank, to investigate the behavioral mechanisms whereby tunas locate and remain in areas of the ocean with high food availability. Within the tank, experimental subjects are able to regulate their positions in a gradient of food density by their swimming direction. Of particular interest to researchers are: 1) the minimum level and gradient-slope of food density necessary for successful regulatory response, and 2) the relationship be- tween swimming speed and turning frequency, and food density."
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            "content": "During the past month, several experiments tested the ability of a kawakawa (Euthynnus affinis) to regulate its position in a food density gradient varying linearly from one item in 50 m to one item in 550 m over a distance of 2.5 km. The fish successfully regulated food availability (achieved a larger ration than expected for a randomly swimming fish) by alternating between clock- wise and counterclockwise swimming in the vicinity of food \"locations\"; however, the fish did not spend proportionately more time in the upper (richest) end of the gradient. Swimming speed varied between 2.4 and 3.6 body lengths sec-1 but was not clearly related to food density."
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            "content": "Salinity Perception Experiment Loses Subject Kawakawa"
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            "spans": [
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            "content": "As an orienting cue for migrating tunas, salinity ranks importantly among the physical variables. Dr. Dizon of the Honolulu Laboratory and Mr. Thomas Byles of the University of Wisconsin are conducting an experiment to determine the minimum step-change in salinity a tuna can detect. After 2 months' conditioning with food reinforcement, a kawakawa living in a sea water-filled tank consistently discriminated between 50% and 100% sea water (17 and 34% salinity) . The fish died, however, before tests could be made at lesser salinity differences. Training is underway with a new subject."
        },
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            "content": "MARINE MAMMAL INVESTIGATIONS"
        },
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            "content": "Scientific Advisory Committee of the Marine Mammal Commission Holds Hearing in San Diego"
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            "content": "The Committee of Scientific Advisors to the Marine Mammal Commission held hearings in San Diego on April 19 and 20. Among other activities, they were briefed, on the afternoon of the 19th, on progress and direction of"
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            "content": "8"
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            "content": "porpoise work conducted by the La Jolla Laboratory. Taking part in the dis- cussions were Center Director Rothschild, who introduced the speakers and briefly discussed the overall program; Dr. Eric Barham, Porpoise Program Manager, who talked about the steps taken by NMFS and industry in de- veloping gear and technique modifications leading toward reduction of por- poise mortalities; Dr. Tim Smith who discussed the methods for estimating size of porpoise populations; Dr. Gary Stauffer, who spoke on estimates of porpoise kill and methods for obtaining these estimates; and Dr. William Perrin who answered questions concerning his work on differentiation and distribution of porpoise stocks."
        },
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            ],
            "content": "Staff of Marine Mammal Investigations Assembling Material on Porpoise/ Tuna Interaction in Preparation for Formal Hearings on Incidental Taking of Marine Mammals"
        },
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            "spans": [
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            ],
            "content": "Led by Dr. Eric Barham, the staff of the Marine Mammal Investigations at the La Jolla Laboratory is assembling material and statistics from the por- poise observer trips, porpoise assessment surveys, and various other data on the interaction between porpoise and tuna in preparation for a formal hearing on incidental taking of marine mammals slated in Seattle, Washington, May 15. Purpose of these hearings, according to Dr. Barham, is to lay a evidentiary base for the manner in which NMFS proposes to treat the prob- lems associated with the incidental taking of marine mammals by commercial fishermen, with particular emphasis on tuna/porpoise. Before the 2-3 week hearings are concluded, the government will enter into the formal record created by the hearing process a summary of the scientific base for the regulations which will be adopted. In addition, the hearing will furnish the forum for receipt of industry and other public reaction to the regulatory process. It is not known at this time whether anyone on the staff at the La Jolla Lab- oratory will be asked to testify directly, although Center Director Rothschild and Dr. Barham will go to Seattle to review the scientific data before the hearings ."
        },
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            "content": "Paper Nearing Completion on Reproduction and Biology of Spotter Porpoise"
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            "content": "Knowledge of the life histories and ecologies of the major porpoise species involved in the tuna fishery of the eastern tropical Pacific is an essential prerequisite to any realistic assessment of the impact of the fishery on the porpoise population. By far the most important species of porpoise taken with tuna is the spotted porpoise, Stenella attenuata, commonly called the \"spotter.\" Dr. William Perrin, leader of the project at the La Jolla Lab- oratory on porpoise life studies is completing a paper on reproduction and biology in the spotter porpoise in collaboration with J. Coe and D. Holts, from which the following information, subject to revision, has been extracted."
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            "content": "9"
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            ],
            "content": "Calves are born one at a time with the average length at birth, 82.5 cm. Average length at 1 year is 138 cm. Females mature sexually at about 180 cm, at 4-8 years of age (the range reflects existence of differing interpretations of age-related layers in the teeth); the gestation period is 11.5 months."
        },
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            "content": "Males mature sexually at about 195 cm and 6-11 years of age. Some growth occurs after attainment of sexual maturity. The average length of adult males is 201 cm and, of adult females, 187 cm. Corresponding weights are about 80 kg and 60 kg, respectively. Maximum length of adult males is about 220 cm and of adult females, about 200 cm. Usual lifespan is probably between 15 and 25 years. Breeding is diffusely seasonal, with two and possibly three periods of reproductive activity annually. The time of these breeding peaks may vary from year to year."
        },
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            "content": "Assuming that samples of animals taken in the tuna fishery are representative of the population, average length of reproductive cycle, that is, the inter- val between calving, is 2.17 years. Average pregnancy rate is 0.47. Lac- tation lasts on the average 11.2 months. About 10% of lactating females become pregnant during lactation. The pregnancy rate decreases with age from about 0.6 in newly mature females to about 0. 3 in old females. Lac- tation rate increases with age, indicating that while the average length of cycle remains about the same, calvings decrease and lactation lengthens . Mortality rates have not yet been estimated."
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            "content": "As part of the expanded porpoise investigations at the La Jolla Laboratory, trained observers are sent to sea on tuna seiners of the U. S. fleet to collect vital information on porpoise life history and mortality, and to observe the operation of porpoise-saving gear and techniques. Thus far 27 observer trips have been completed within the Commission Yellowfin Regulatory Area (CYRA); three of the observers have returned from their second trips. Presently eight observers are still at sea, all except one on their second trips of the 1974 yellowfin tuna fishing season."
        },
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            "content": "Dr. Barham, Porpoise Program Manager, is making tentative plans for six more observers to accompany tuna seiners on trips outside the CYRA but final determination to send these observers depends on such factors as the success of skipjack fishing, the prevalence of school fish (tuna traveling without porpoise) , and whether skippers will decide to fish for yellowfin (the species most commonly found associated with porpoise) outside the CYRA."
        },
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            "content": "PHYSIOLOGY INVESTIGATIONS"
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            "content": "This investigation at the Tiburon Laboratory deals with the physiological effects of pollutants on fishes, molluscs and crustaceans. Current efforts are devoted to studying the effects of the low-boiling aromatic components of petroleum products on selected species of marine fish during all life stages from egg through adult."
        },
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            "content": "This month, Dr. Jeanette Struhsaker, Fishery Biologist at the Tiburon Lab- oratory, reported that adult Pacific herring are being exposed to two sub- lethal concentrations of xylene for a 3-week period. Blood parameters and the uptake and distribution of residues are being measured. Preliminary results showed that brain tissue accumulated 5. 6 ppm and liver tissue 4.3 ppm xylene after the fish were held for 3 days in a bath containing 1.5 ppm xylene."
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            "content": "Calibrations and methods for use of 14c aromatic compounds in uptake studies are being developed. A tissue solubilizer is being used to digest samples for scintillation counting."
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            "content": "A gas sampling system was installed on the Micro-Tek 220 GC, which now allows the analysis of aromatic components in water samples in the parts per trillion range."
        },
        {
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            "content": "The analysis of data from previous experiments with adult and larval fish exposed to xylene is near completion, and results of these experiments are being prepared for publication."
        },
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            "content": "STOCK ASSESSMENT AND FISHERY EVALUATION INVESTIGATIONS"
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            "content": "SWFC Recommends U. S. Submit Two Sets of Tuna Statistics to ICCAT"
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            ],
            "content": "The International Commission for the Conservation of Atlantic Tunas (ICCAT) requests that member nations annually submit to ICCAT official statistics on the total catch of Atlantic tunas and tuna-like fishes, for stock assess- ment purposes and certain other ICCAT uses. Since U. S. official statistics are for landings, landing statistics instead of catch statistics have been"
        },
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            "content": "11"
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            "content": "regularly submitted by the U.S. Unfortunately, not all of the U. S. catches are landed in the U. S. or in the year caught and the statistics, therefore, are poor substitutes for catch statistics, especially when they are used for the purposes of stock assessment."
        },
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            "content": "A team headed by Dr. G. Sakagawa, Fishery Biologist at La Jolla made an in-depth investigation of the problem and recommended that the best solution at this time is for the U. S. to submit two sets of statistics to ICCAT: 1) \"official\" landing statistics and 2) estimated catch statistics. This recommendation was accepted and appropriate action taken."
        },
        {
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            "content": "The size composition of yellowfin and skipjack tuna in the American catch from the eastern Atlantic has been estimated annually by scientists in the Stock Assessment and Fishery Evaluation Investigation at La Jolla, for use in stock assessment. Two different techniques, one for yellowfin and another for skipjack, were used to estimate the size composition for years until 1973. The techniques differ in the degree of time-area-boat-stratifica- tion of size-frequency samples and catch; the technique used for yellowfin contains a much finer stratification than that used for skipjack tuna. Tests showed that the finer stratification technique gave a less biased estimate. This technique was therefore used for both yellowfin and skipjack beginning in 1973."
        },
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            "content": "The task of re-estimating past years (1969-72) size composition of the catch of skipjack tuna with the finer stratification technique has been initiated. Mr. A. Coan, Mathematician and Mr. E. Holzapfel, Biological Technician, are performing the task under the direction of Fishery Biologist G. Sakagawa."
        },
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            "spans": [
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            "content": "Scientist from Brazil on Training Mission at SWFC's La Jolla Laboratory"
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            "content": "Mr. Luis A. Zavala-Camin, scientific researcher of the Instituto de Pesca, Santos, Brazil, is on a 6-month training mission at the La Jolla Laboratory. Mr. Zavala-Camin is working with Drs. W. Fox, W. Lenarz, and G. Sakagawa of the Stock Assessment and Fishery Evaluation Investigations on techniques for evaluating the status of tuna stocks."
        },
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            "content": "For the past 3 years, Mr. Zavala-Camin has been in charge of the tuna investigations of the Instituto de Pesca in Santos, Brazil. Extensive data on the small (three vessels) but important Brazilian longline fishery of the Atlantic were collected under his leadership. Since arrival in La Jolla early this month, Mr. Zavala-Camin has been organizing the Brazilian longline data and performing general analysis in preparation for more detailed analyses."
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            "content": "12"
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            "content": "Multiple Gear Yield Per Recruit Model Documented"
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            "content": "Dr. William Lenarz, Fishery Biologist at the La Jolla Laboratory, has generalized and documented the computer program, MGEAR, so that it may be used by other scientists. The program computes estimates of yield per recruit and several related parameters for fisheries that are exploited by several gears having differing vectors of age specific fishing mortality. Tables of yield per recruit, landings per recruit when fish below a minimum size are caught and discarded dead, average weight of fish in catch, and yield per recruit per effort as functions of minimum size and amount of fishing effort are contained in the output for each gear and the entire fishery. A brief manuscript that describes the program has been prepared by Dr. Lenarz."
        },
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            "content": "Production Model Methodology Completed"
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            "content": "Dr. William Fox, Leader of the Stock and Recruitment Investigations at the La Jolla Laboratory, has completed revision of a manuscript describing a least-square method for fitting the generalized stock production model. The method uses John Gulland's concept of equilibrium approximation but involves a new weighting procedure for estimating equilibrium levels of fishing effort. Variability indices of the parameter estimates were also worked out."
        },
        {
            "spans": [
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            ],
            "content": "In the manuscript, simulated data from a pandalid shrimp fishery were utilized to illustrate the efficacy of the fitting method. The results indi- cated that the methodology can be useful for analyzing the status of a par- ticular fish stock; however, the assumptions and limitations were also dis- cussed. Documentation on use of the computer program, PRODFIT, which performs the calculations has been completed."
        },
        {
            "spans": [
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            "content": "Rate of Environmental Observations from Tuna Seiners Up in April"
        },
        {
            "spans": [
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            "boundingRegions": [
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            ],
            "content": "During the first quarter of 1974, 67 tuna purse seiners equipped with radio facsimile equipment radioed 640 weather observations and 112 expendable bathythermograph (XBT) observations to Commerce-licensed ratio station WWD. This total of 752 environmental observations is 41% below the re- porting rate for the first quarter of 1973, according to Oceanographer R. Evans of the La Jolla Laboratory. Much of this drop-off can be attributed to the late start of the 1974 tuna fishery in mid-January and the tendency of many boats to fish school fish rather than tuna associated with porpoise. Fishing on school fish make greater demands on the crews' time, than does the fishery on tuna schools traveling with porpoise. The reporting rate improved in April 1974 and was up 41% from April of 1973."
        },
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            "content": "13"
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            ],
            "content": "At this time, 14 San Diego-based tuna vessels have purchased their own radio facsimile recorders and this number is expected to increase, reflect- ing a spreading interest in the FAX program. However, the quality of radio facsimile advisories on weather and fishing conditions can be maintained only through continued cooperation of the fishermen in observing and re- porting environmental data."
        },
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            "content": "Final Report Submitted to NSF on Ships-of-Opportunity-XBT Project"
        },
        {
            "spans": [
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            ],
            "content": "Oceanographer J. F.T. Saur of the La Jolla Laboratory submitted a final technical report on the ships of opportunity-expendable bathythermograph (XBT) project funded by the National Science Foundation (NSF) , Office for IDOE, under NSF Grant AG-256 for the period March 13, 1971-December 31, 1973. With IDOE support, 134 sections of closely-spaced XBT observations were made on seven shipping routes in the tropical and North Pacific Ocean, for a total of more than 3, 300 observations. Beginning in March 1972, 41 sections on the Hawaii-San Francisco route were published in Fishing Infor- mation, published monthly by the La Jolla Laboratory ."
        },
        {
            "spans": [
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            ],
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            ],
            "content": "The project, which is a cooperative effort of the Southwest Fisheries Center and the NMFS Pacific Environmental Group at Monterey, is presently con- tinuing as part of the North Pacific Experiment (NORPAX) with joint support from the National Science Foundation and the Office of Naval Research."
        },
        {
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            "content": "Airborne Sea Surface Temperature Surveys Resumed Over the San Diego Test Area for 1974 Fishing Season"
        },
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            "spans": [
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            ],
            "content": "Fishery Biologist J. Squire of the La Jolla Laboratory reports that airborne sea surface temperature surveys were resumed this month over the San Diego Test Area for the 1974 fishing season. At weekly intervals the im- portant sportfishing areas from near Del Mar in the north to south of the Coronado Islands and up to 15 miles offshore will be surveyed from a twin- engined Beechcraft aircraft equipped with precision infrared radiometer. This will be the third and final year of such surveys, which are conducted during the peak fishing period, April through October."
        },
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            ],
            "content": "Survey flights were made by Mr. Squire on April 1, 11, 17, and 23. From the results of these surveys isotherm charts were drawn and distributed to a small mailing list of local sportfishing operators and other interested persons."
        },
        {
            "spans": [
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            ],
            "content": "The catch/environment study utilizes these temperature data for comparison with trends in sportfish catch. The number, species, angler effort, and location of marine game fish caught off San Diego are routinely obtained"
        },
        {
            "spans": [
                {
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            "content": "14"
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            "spans": [
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            "content": "by the California Department of Fish and Game from sportfishing boat logs. The temperature and catch data will be analyzed to determine the relation between temperature levels and catch and catch changes relative to tem- perature change."
        },
        {
            "spans": [
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            "content": "To date, 65 survey flights have been conducted over the test area since the inception of the program."
        },
        {
            "spans": [
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            "content": "Cooperative Marine Game Fish Tagging Program Annual Report Distributed"
        },
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            "spans": [
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            ],
            "content": "The 1973 Annual Report was distributed this month by the La Jolla Laboratory to all cooperating marine game fishermen participating in the tagging program. This report reviews the program of the tagging program during the past year, and the trend in billfish catches for the important fishing areas in the Pacific."
        },
        {
            "spans": [
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            ],
            "content": "A postcard form was enclosed with the Annual Report, to survey the angler billfish catch in 1973. Mr. J. Squire, Fishery Biologist, who is in charge of the tagging program, reports that these postcard forms for the \"Pacific International Billfish Angling Survey,\" are being returned in good numbers."
        },
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            "content": "STOCK AND RECRUITMENT INVESTIGATIONS"
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            "content": "Retrospective Look at 10-Year Progress of Fish Aquaculture at SWFC"
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            "spans": [
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            ],
            "content": "Describing the work of his program for the National Fisheries Plan, Dr. Reuben Lasker, Leader of the Stock and Recruitment Investigation, took a retrospective look at the progress of fish aquaculture at the SWFC for the past 10 years. The main purpose of the program on the survival and mortality of marine fish larvae has been to gather information which can be applied to the problem of fish population fluctuations in the sea. Because of the continuing need for live fish eggs and larvae for experimentation it became increasingly necessary to devise techniques to insure the avail- ability of fish larvae at all times of the year, and to rear these larvae successfully through metamorphosis."
        },
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            ],
            "content": "According to Dr. Lasker, at this time, sexual maturation of a number of fish can now be routinely accomplished in the aquarium of the La Jolla Laboratory despite the seasonal nature of maturation and spawning in the sea. Marine fishes which have been successfully matured and spawned include the northern anchovy (Engraulis mordax) , the Pacific sardine (Sardinops caeruleus); the croaker (Bairdiella icistia) , the Pacific mackerel (Scomber japonicus) , and the anadromous striped bass (Morone saxatilis) . Combinations of selected photoperiods and temperature are the main environ- mental cues used to mature these marine fish. For example, adult northern"
        },
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            "content": "15"
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            "content": "anchovy can be induced to mature and spawn daily throughout the year if kept under a constant daily 4 hours light-20 hours dark cycle at 15ºC. Other fishes may require long light and short dark daily cycles and different temperatures. Although the anchovy spawns eggs spontaneously under laboratory conditions throughout the year, this is not common in other fishes. Under normal circumstances, mature fish require injection of human chorionic gonadotrophins to induce mass spawning. Despite its anadromous nature striped bass have been induced to mature and spawn out of season in full sea water; fresh water was needed for fertilization."
        },
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            "content": "Rearing of larvae through metamorphosis has been achieved with all the species mentioned using either cultured marine food organisms such as the dinoflagellate Gymnodinium splendens, the rotifer Brachionus plicatilis and the harpacticoid copepod Tisbe furcata, or with wild plankton sieved from sea water."
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            "content": "Striped bass eggs and larvae require slow acclimation to increasing salinity over an 18-day period to survive in full sea water. Once this is achieved, however, metamorphosis is completed successfully and growth is rapid if the fish are well fed."
        },
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            "content": "The maturation and spawning of striped bass in sea water and the acclimation of its eggs and larvae to sea water suggests that a sea water hatchery for this species may be possible where fresh water is at a premium, as in southern California. Work on striped bass at the Southwest Fisheries Center is a collaborative effort between the Inland Fisheries Branch of the California Department of Fish and Game and the La Jolla Laboratory."
        },
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            "content": "Experiment with Laboratory-Reared Anchovy Larvae Repeated at Sea; Chlorophyll-Maximum Layer Re-established After Storm"
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            ],
            "content": "Dr. Reuben Lasker, Leader of the Stock and Recruitment Investigations, continued his work at sea this month to determine if the chlorophyll-maximum layers inshore continue to be good feeding grounds for first-feeding anchovy larvae. Using cultured larvae from laboratory-spawned eggs, Dr. Lasker found that there was a well-established chlorophyll maximum layer at 16 m depth over the 20-fathom line near San Onofre, California."
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            "content": "First-feeding anchovy larvae showed active feeding on the phytoplankton particles which were numerous in this layer. This result was similar to the one obtained at the same place last month. However, the night following this observation a wind storm (4.7 on the Beaufort scale) came up and forced the research vessel, Jordan, into port for part of a day. When the station at San Onofre was reestablished the chlorophyll maximum layer had been"
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            "content": "obliterated and there was no significant feeding by larvae when placed in this water. The San Onofre station was revisited on April 22, 12 days after the storm. The chlorophyll maximum layer had been reestablished and the anchovy larvae bioassay indicated it was once again a good feeding ground for fish larvae."
        },
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            "content": "Efforts Resumed to Spawn Pacific Mackerel in Laboratory with Hormone Injections"
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            "content": "Efforts have been resumed this month by Mr. R. Leong, Fishery Biologist at the La Jolla Laboratory, to improve upon the techniques for spawning Pacific mackerel in the laboratory with hormone injections. The combina- tion of salmon pituitary extract followed a day later with gonadotropin from pregnant mare serum appeared promising and was used to spawn fish on two occasions. The yields were 2 and 5 thousand viable eggs which is sufficient for some types of larval experimentation. However, the number of viable eggs was still less than 20% of the total spawned and work is continuing to improve techniques ."
        },
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            "content": "Mr. Leong has observed that mackerel in post-spawning condition require a lengthy period to reach functional maturity again -- the level of develop- ment at which a fish can be spawned with hormone application. The fish held in outside tanks under ambient light and temperature conditions which stopped spawning last September again became functionally mature in April after a period of about 6 months. Fish held inside under a photoperiod of 14 light, 10 hours of darkness and 18ºC temperatures became spawnable about a month and a half earlier, but the waiting period was still 4-5 months."
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            "content": "Mr. Leong also used hormones to spawn anchovies on several occasions, to provide large numbers of eggs for larval studies. The injections worked very well with the result of high fertility and hatching rates. Unfortunately, one of the tanks containing a spawning group of anchovies burst open over a weekend and all the fish were lost. The tank and fish have since been replaced and steps are being taken to prevent a recurrence of the accident."
        },
        {
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            "content": "Induced Maturation of Female Striped Bass Successful"
        },
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            "content": "Messrs. K. Lal and A. Kuljis of the California Department of Fish and Game working in cooperation with Dr. R. Lasker, Physiologist and Leader of the Stock and Recruitment Investigations at the La Jolla Laboratory, reported the induced maturation of a 20-pound female striped bass held in sea water. This was accomplished by combining favorable photoperiod (15 hours light, 9 hours of darkness) . It now appears certain that the major barrier preventing"
        },
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            "content": "17"
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            "spans": [
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            "content": "the females from attaining complete maturity in sea water can be removed by serial injection of human chorionic gonadotrophins (HCG) ."
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            "content": "The first injection of HCG was given after the female had reached an egg development of 0.75 mm diameter with photoperiod alone. A fortnight later, the eggs had attained a size of 1.2 mm diameter. A second injection was given after 16 days to induce spawning. The female responded extremely well to the hormone treatment and in less than 24 hours after the second injection it started to release eggs. The mass of eggs looked greenish in color and the yolk had cleared, indicative of ready-to-fertilize ova. A partial stripping of 20,000 eggs was made at first, followed by a second stripping of about 10,000 eggs an hour later. Both times, fertilization was attempted in fresh water with milt squeezed from a single male, also matured in sea water. Actual cleavage was observed in many eggs 2 hours after fertilization. No larvae developed from the eggs but it is uncertain whether this was due to inadequate sperm or fouling of the tank which occurred overnight."
        },
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            "content": "Work Continues on Handbook of Early Life History Stages of Fishes of the California Current"
        },
        {
            "spans": [
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            "content": "Senior Scientist Elbert Ahlstrom reports that work continued at La Jolla in assembling, illustrating and studying life history series for inclusion in the handbook of early life history stages of fishes of the California Current. Mr. Henry Orr, Office Draftsman, completed illustrations for three life history series and is working on several additional series."
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            "content": "Ms. Barbara Sumida, employed on a Smithsonian Institution contract, joined Dr. Ahlstrom's group in April where she is assembling series for inclusion in the handbook, as well as making morphometric measurements and meristic counts on selected specimens, and selecting series for illustration. Ms. Sumida has had considerable experience working with larval fish collected off the Hawaiian Islands and participated in Dr. Ahlstrom's 6-week larval fish course given in 1972."
        },
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            "spans": [
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            "content": "Work has also continued in assembling data for a manuscript dealing with midwater trawl collections made on extended CalCOFI Cruises 7205 and 7210. Mr. John Butler is working with Dr. Ahlstrom at La Jolla on this project and will be a co-author of the manuscript. Work also continued in identifying fish eggs and larvae taken on Cruise 7205 in surface (neuston net) hauls, regular CalCOFI hauls, and \"deep\" oblique hauls. Ms. Elizabeth Stevens, Biological Technician, is primarily responsible for this project."
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            "content": "18"
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            "content": "Dr. Ahlstrom was able to devote several days this month to work on a manuscript dealing with the life history of the northern anchovy, a coop- erative study with Fishery Biologists D. Kramer and R. Counts."
        },
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            "spans": [
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            "content": "The objective of the daytime portion of Cruise 85 on the Jordan from April 24-26, was to obtain length-weight relationships for certain species of rockfishes (Sebastes) . Fishing was carried out on Sixty-Mile Bank at 0600-1600 hours on April 25 and Forty-Three Fathom Bank at 0600-0900 on April 26. According to Dr. G. Moser, Fishery Biologist at the La Jolla Laboratory, who was in charge of the trip, about 100 specimens of Sebastes comprising 11 species were collected on April 25 and 16 specimens com- prising six species were taken on April 26. All specimens were measured, sexed, and analyzed for gonad maturity and stomach contents. Proper weighing of the fish was precluded by rough seas."
        },
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            "content": "Dr. Moser also reports that he has made progress on the identification guide to scorpion fish larvae of the eastern Pacific, and this section on the rockfishes is nearing completion. A series of Sebastes marinus, the Atlantic redfish was sent to Dr. Moser by the NMFS Laboratory at Narragansett and has enabled him to make a comparison of larvae of Sebastes from both the Atlantic and Pacific Oceans."
        },
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            "content": "Study of Effects of Starvation on Anchovy Larvae Continue"
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            "content": "Dr. C.O'Connell, Fishery Biologist at the La Jolla Laboratory reports that studies of the effects of starvation on anchovy larvae continued this month with preparation of specimens from a number of laboratory trials for histological examination. In the most recent of these trials close to 500 larvae were re- trieved by harvesting the entire living population of one food treatment and one no-food treatment container on each of 10 successive days following hatching. While mortality increased slightly on day 9 in the presence of food, it was almost total on day 8 in the absence of food. The range of standard lengths was considerable from all containers, but whereas average length increased steadily throughout in the presence of food, it declined steadily after day 5 in the absence of food."
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            "content": "Specimens from the latter trial will be processed in small groups to pursue and delineate histological and histochemical variability that suggests dif- ferences between the fed and starving conditions. The first group being processed represents the largest and smallest specimens from each treatment on each day. Some are being prepared for routine staining, some for study of lipoid architecture, and a few are being prepared for electron microscope examination."
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            "content": "NOAA Researcher Examines Effects of Reduced Oxygen on Fish as Swimming Approaches Speeds Adequate to Support Ram Gill Ventilation"
        },
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            "content": "What factors provide primary sensory information for switching between active and passive modes of gill ventilation in fish? This question points out another objective that Dr. John L. Roberts, NRC-NOAA Research Associate, La Jolla Laboratory, has chosen for his study on mechanisms which control breathing patterns in fish. This month, Dr. Roberts has been examining the effects of reduced oxygen on fish as swimming approaches speeds adequate to support ram gill ventilation. Results with three half- moons, Medialuna californiensis, and two jack mackerels, Trachurus symmetricus, show that low concentrations of oxygen have only a slight effect on boosting the conversion swimming speed., Oxygen concentrations must drop to as low as a third of the expected values for air saturated sea water at 170-18℃ for the effect to be seen."
        },
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            "content": "Previous experiments with the blue runner, Caranx crysos, at the aquarium, NMFS, Woods Hole, showed that high temperature stress at sub-lethal to lethal levels induces only slight increases in the transition speed for ram ventilation -- another indication that oxygen delivery to the gill surface for satisfaction of metabolic needs can vary widely without significant effect."
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            "content": "Dr. Roberts concludes that oxygen detection is not an important receptor function in the reflex switching between active and passive gill ventilation. He suggests, on the other hand, that flow detection in the bronchial chamber and proprioceptive feedback of tail-beat frequency during swimming are · critical sensory functions for control of the onset of the ram mode of gill ventilation in fish."
        },
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            "content": "SURVEY SYSTEMS ANALYSIS INVESTIGATIONS"
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            "content": "Results of Sonar Cruises Indicate Probability of Low Relationship Between Occurrence of Pelagic Fish Schools and Bottom Topography"
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            "content": "A series of sonar cruises, designed to test a postulated relationship be- tween the occurrence of pelagic fish schools and bottom topography, was completed in April aboard the R/V David Starr Jordan, under the direction of Lt. R. Hewitt, at the La Jolla Laboratory. According to Mr. Hewitt, a commissioned officer on assignment to NMFS from NOAA Corps, the data suggest that the probability of such a relationship is very low and that the variation of detected target densities within defined topographic categories is as great as the variation between them. The empirical support of the null hypothesis is significant in the specification of sources of variability with regard to hydroactoustic surveys."
        },
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            "content": "Dr. Paul Smith, Investigation Leader at La Jolla has determined the amount of increase in sampling effort needed to obtain estimates of spawning biomass for several inshore sport fishes within given error limits. The biomass estimates would be made from larval surveys exploiting similar methods used for widespread populations such as hake, sardine and anchovy and would necessitate a three-to-four fold increase in inshore sampling ."
        },
        {
            "spans": [
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            "content": "Visiting Scientist from Institute of Marine Environmental Research, Plymouth, Arrives at La Jolla Laboratory for 6-Months Stay"
        },
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            "content": "Dr. Michael Colebrook, visiting scientist from the Institute of Marine Environmental Research, Plymouth, England, arrived in early April at the La Jolla Laboratory for an expected stay of 6 months. Dr. Colebrook will collaborate with Investigation Leader Paul Smith on various data time series generated over the past 25 years by the California Cooperative Oceanic Fisheries Investigations. Since his arrival, Dr. Colebrook has devised a computer model simulating the dispersal of newly spawned fish eggs; the stochastic model can be used to describe the areal distribution of a patch of eggs after a given time interval(s) ."
        },
        {
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            "content": "TUNA ASSESSMENT AND DEVELOPMENT INVESTIGATIONS"
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            "content": "Baitfish Transport System Survives Critical First Test with the Successful Shipment of Live Anchovies from California to Honolulu"
        },
        {
            "spans": [
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            "content": "The skipjack pole and line fisheries of the Indo-Pacific area are frequently faced with limited supplies of tuna baitfish. In an attempt to alleviate this situation, the Honolulu Laboratory has embarked upon a study of the feasi- bility of transporting baitfish to an area of short supply with the design, construction, and testing of a baitfish transport system. In early April Donald Aasted, Fishery Methods and Equipment Specialist, accompanied the prototype baitfish transport tank to California on board the Matson \"roll-on/roll-off\" freighter Matsonia. During the 4-day transit, Mr. Aasted tested the operation of the open circulation system hooked to the fire hydrant system of the vessel. This delivers 400 gallons per minute of sea water through the transport tank, a supply which is theoretically adequate for from 700-1400 pounds of anchovies based on respiration demand and oxygen availability at the maximum temperatures expected."
        },
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            "content": "The tank was met at Long Beach Harbor by Project Leader Roger Green and Fishery Biologist Reginald Gooding. A series of minor tank modifications and dockside experiments with live anchovies were accomplished prior to departing for Hawaii with the first load of baitfish."
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            "content": "21"
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            "content": "A site was chosen at the dock of Battelle Columbus Laboratories both for its security and proximity to the allegedly cleaner waters of outer Long Beach Harbor. The first experiment ended with about 95% mortality in 3 days of testing on the open system. Three things seemed probable causes for the failure: 1) the pump that was rented for this test on the basis of its advertised specifications of 275 gallons per minute at our operating head actually delivered 100 gallons per minute or less; 2) the amount of fish in the tank was estimated at 600 pounds, but after weighing the fish at the completion of the experiment it was discovered that actually about 1,200 pounds had been loaded; and 3) according to later reports from a local water quality monitoring agency, there were quite possibly some unusual water quality problems in Long Beach Harbor during that period."
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            "content": "For the second experiment another pump delivering 200 gallons per minute was used, and the load of anchovies was limited to an estimated 350 pounds. After 4-1/2 days it was determined that 278 pounds had originally been loaded, 5 pounds of which died in the first and second days, 71 pounds the third day, and 21 pounds the fourth day, giving an overall total mortality of 36% ."
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            "content": "A third lot of baitfish, estimated at 550 pounds, was loaded in the tank on the morning of April 16 for shipment to Honolulu on the morning of the 18th. Forty pounds of fish had died by the next afternoon and were siphoned out. The tank was taken by Matson to the ship about 10 hours prior to sailing time, so the fish were subjected to much moving about to temporary loca- tions at five hydrants during the loading of the Matsonia, and were on the closed system for several hours. When they arrived in Honolulu at 0730, March 22, they were taken to the Kewalo facility and unloaded into a 13,000- gallon plastic holding tank with a sea water supply of 60 gallons per minute. Fifty-one pounds of dead fish were removed, an additional 46 pounds having been removed during the crossing by Mr. Gooding, who accompanied them."
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            "content": "The remaining fish are still alive and so the original estimate as to the amount carried has not yet been verified."
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            "content": "A discharge system designed to remove dead fish continuously while the tank is on open circulation is now being installed. Also, a new tank draining system with a 4-inch valve and hose is being installed. The new drain may also serve as a live fish unloading system. These preparations for the May trip are being made by Messrs. Aasted, Gooding, and Kazama at Honolulu"
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            "content": "22"
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            "content": "Honolulu Laboratory Scientist Continues Examination of Catch and Effort Data of Nehu from Kaneohe Bay, Oahu"
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            "content": "During April, Dr. Jerry Wetherall, Fishery Biologist in the Tuna Assessment and Development Investigations, continued his examination of nehu catch and effort data from Kaneohe Bay, Oahu. Nehu, a Hawaiian anchovy, is the preferred bait of local skipjack tuna fishermen and Kaneohe Bay is a prime baiting ground. The assessment of the nehu stocks in Hawaii will be among topics discussed at a forthcoming baitfish workshop in Honolulu in June. In addition to preparing for the workshop, Dr. Wetherall reviewed a manu- script on growth of marlins in the central Pacific by Dr. Skillman and Ms. Yong."
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            "content": "Manuscripts and a Trip Report Occupy Fishery Analysis Program in April"
        },
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            "spans": [
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            "content": "The Fishery Analysis Program at the Honolulu Laboratory, under the leader- ship of Dr. Robert A. Skillman, carries out the objectives of the Task, Tuna Monitoring and Assessment, Pacific and Indian Oceans, as set forth in SWFC's skipjack development plan, with major emphasis placed on stock assessment, fishery monitoring, and fishery liaison. In addition, the status of exploited stocks of other tuna and tuna-like resources of U. S. concern is being monitored through the systematic collection and analysis of fisheries data. The Task is organized into three subgroups: fishery liaison and monitoring; assessment of skipjack tuna resources; and assessment of other tuna and tunalike resources."
        },
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            "spans": [
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            "content": "Work on manuscripts and a trip report dominated this month's activities. The manuscript \"Von Bertalanffy growth curves for striped marlin, Tetrapturus audax, and blue marlin, Makaira nigricans, in the central North Pacific by the progression of modes method\" by Robert A. Skillman and Marian Y. Y. Yong is being reviewed internally."
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            "content": "A condensed version of the studies on the assessment of South Pacific albacore entitled \"An assessment of South Pacific albacore, Thunnus alalunga, fishery, 1953-71\" by Robert A. Skillman has been written for the Marine Fisheries Review. This manuscript has been sent to the Director, Honolulu Laboratory , for evaluation."
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            "content": "Dr. Skillman prepared a report covering the highlights of his recent trip to American Samoa. He traveled there to review the sampling program for South Pacific albacore and, where possible, to facilitate and expand the . collection of catch, effort, and size-sex data from the fishery. In response to a need voiced by cannery officials and fisheries officers for more timely"
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            "content": "23"
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            ],
            "content": "summaries on the state of the fishery, the Honolulu Laboratory will investi- gate the possibility of providing them, taking into consideration our reduced support staff and the workload involved. Keypunching of the logbooks is continuing and, upon completion, the final, detailed catch-effort reports will be computed as in the past."
        },
        {
            "spans": [
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            "content": "Slim April Catch of Skipjack Tuna in Hawaiian Fishery"
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            "spans": [
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            ],
            "content": "The estimated April catch of skipjack tuna in the Hawaiian fishery was 197 metric tons. This was down from last year's April catch by 127 metric tons and was 29 metric tons less than the long-term (1948-73) April average. The skipjack tuna catch for the first 4 months of 1974 was estimated at 650 metric tons, 170 metric tons above the 1973 catch for the same period and 79 metric tons above the long-term average."
        },
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            ],
            "content": "Dr. Robert A. Skillman issued the 1974 Hawaiian skipjack tuna catch pre- diction of 3800-4000 metric tons to presage a not particularly good year."
        },
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            "spans": [
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                    "offset": 58837,
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            "content": "INFONET TRAINING COURSE HELD AT CENTER"
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            "spans": [
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                    "offset": 58876,
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            ],
            "content": "Mr. Ralph Bates, Systems Analyst in charge of the Automatic Data Processing section at the Southwest Fisheries Center, reports that the Center is planning greater utilization of INFONET during FY 75. Under the government's GSA contract, INFONET provides nationwide coverage and national access to common data bases from its computer center in Los Angeles. It is thus possible to initiate processing from one type of terminal while receiving output from another (or several others) of various types. This input/output capability allows the collection of input data and the dissemination of output in the most efficient, cost-effective, and convenient manner."
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                    "offset": 59534,
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            "content": "Mr. Bates said that the group at the Center plans to use two major components of the system facility; namely, GPS and DML. GPS (General Programming System) is tailored to users who are relatively knowledgeable in computing and program development and production processing, as well as advanced problem-solving activities. DML (Data Management Language) provides the type of facilities common to high-level language data management sys- tems. Data banks will be developed using the DML system which will pro- vide easy access of data to develop specific informational requirements ."
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            "content": "24"
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            ],
            "content": "ERICA"
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            "content": "STATES OF"
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            ],
            "content": "U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration NATIONAL MARINE FISHERIES SERVICE"
        },
        {
            "spans": [
                {
                    "offset": 60245,
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            ],
            "content": "Page 1 of 3 May 1, 1974 Ralph B. Bares"
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            "spans": [
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            "content": "PROJECT MILESTONES"
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            ],
            "content": "FISCAL YEAR 74"
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                    "offset": 60318,
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            "content": "MONTH - >"
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            "content": "MONTH / WEEK"
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            "content": "WEEK->"
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            "content": "APRIL JUNE JULY 1234 123451234 1234 MAY"
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            "content": "PROJ. TITLE"
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            "content": "MILESTONES"
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            "content": "DR"
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            "content": "SW-01-011 INPUT DATA-GYMNO EXP. -- HUNTER"
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            "content": "RB"
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            "content": "SW-04-031 STD DATA REVISE SYSTEM -- LYNN"
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            ],
            "content": "BEHIND SCHEDULE"
        },
        {
            "spans": [
                {
                    "offset": 63604,
                    "length": 540
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            ],
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                }
            ],
            "content": "A training class was held at the La Jolla Laboratory during the week of April 30 covering the use of GPS and DML, with the following people attending: R. Bates, D. Roll, and N. Wiley of the ADP section, A. Coan, L. Eber, B. Wahlen, and J. Zweifel of the Stock Assessment and Fishery Evaluation Investigation; J. Coe and C. Oliver from the Marine Mammal Investigations. G. Galbraith from NMFS Terminal Island and I. Watkins, Post Office, also attended the INFONET course. Mr. Ken Hutchens of Computer Sciences Corporation was the instructor."
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            "spans": [
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            ],
            "content": "Shown on pages 25, 26, and 27 are the milestone charts for the period April 1974 through June 1974, prepared by Mr. Ralph Bates, Systems Analyst, listing the various ADP projects and their projected schedules."
        },
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            "spans": [
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            ],
            "content": "PUBLIC AFFAIRS"
        },
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                    "length": 80
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            ],
            "content": "Southwest Fisheries Center Exhibit Aboard Ferry Boat, Berkeley, Opened to Public"
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            ],
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            "content": "Opened to the public in April, the major exhibit aboard the 76-year-old ferry boat, Berkeley, moored at the San Diego waterfront, is that of the NMFS Southwest Fisheries Center. Created and assembled by Ken Raymond, Scientific Illustrator at the La Jolla Laboratory, the exhibit covers major aspects of the research carried out by the SWFC's Honolulu and La Jolla Laboratories and features model fishing nets, a model of a modern tuna seiner, casts of billfish, yellowfin, skipjack, and albacore tuna, a cut- away model of an expendable bathythermograph, a display of stained, transparent larval and juvenile fish, oceanographic sampling gear, and many other items ."
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            ],
            "content": "The Berkeley, together with the sailing vessels, Medea and Star of India, are floating museums operated by the non-profit Maritime Museum Associa- tion of San Diego. The Berkeley was the second propeller-driven ferryboat on the Pacific Coast and participated in the evacuation of San Francisco following the earthquake and fire of April 18, 1906 when the ferries ran for 24 hours a day, carrying thousands of refugees to the comparative safety of Oakland. The vessel still retains its original 1898 carved wood paneling, plate glass mirrors, and stained-glass windows. Below decks, the original steam engine remains in place and is in operating condition."
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            ],
            "content": "Officials of the Maritime Museum Association estimate that a million people will view the SWFC exhibit on the Berkeley over the next 5 years."
        },
        {
            "spans": [
                {
                    "offset": 65916,
                    "length": 2
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            "content": "28"
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            "content": "April 3"
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                    "length": 256
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            ],
            "content": "- Representing the Honolulu Laboratory Director, Dr. Richard Barkley attended the dedication ceremonies of the Moana Wave at Pier 8 in Honolulu Harbor. The 176-foot Moana Wave is the newest and largest research vessel belonging to the University of Hawaii."
        },
        {
            "spans": [
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            ],
            "content": "15 Mr. Izadore Barrett, Deputy Center Director, was the featured speaker at a meeting of the American Cetacean Society at the Scripps Institution of Oceanography, Mr. Barrett discussed \"Dolphins and the tuna industry.\""
        },
        {
            "spans": [
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                    "offset": 66403,
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            "content": "16"
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            "content": "- Laboratory Director Richard Shomura reviewed current management programs in high-seas fisheries for Dr. John Bardach's world-fishery class at the University of Hawaii."
        },
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            "content": "19"
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            "content": "- Mr. Abramson, Lt. Hornick and Mr. Korn of the Tiburon Fisheries Laboratory talked to a marine biology class from Kennedy High School, Richmond, who visited Tiburon. The class was also given a tour of the Physiology Laboratory ."
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            ],
            "content": "24 A NMFS co-sponsored Financial Assistance Seminar was held at the Pagoda Hotel in Honolulu. Mr. Shomura talked during the morning session on an \"Overview of Hawaii's Fisheries.\""
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            "content": "25 - Chemist Pete Benville of the Tiburon Laboratory presented a talk on environmental careers with the Federal Government at the College of Marin."
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            "content": "As it has annually for the past 10 years, the La Jolla Laboratory was host to 26 participants in the 20th Annual Greater San Diego Science and Engineer- ing Fair on April 19. Fishery Biologist David Kramer once again welcomed the young people with a lecture on the work in progress at the laboratory , showed them a film on planktonic life in the sea (to which the SWFC con- tributed footage) and led them on a tour of the laboratory's facilities."
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            ],
            "content": "Mr. Izadore Barrett, Deputy Director, served as one of the judges in the Biology Division at this year's Science Fair."
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            ],
            "content": "29"
        },
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            "content": "Press Releases"
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            "content": "The following press releases were prepared and issued this month by the Southwest Fisheries Center:"
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            "content": "April 15"
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            ],
            "content": "- International Tuna Research Organization Sponsors Annual Tuna Tag Recovery Lottery"
        },
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            ],
            "content": "16 - NMFS Physiologist Studies Laboratory-Reared Fish Under Conditions at Sea"
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            "content": "SEMINARS AND LECTURES"
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            "content": "La Jolla Laboratory"
        },
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            "content": "April 11"
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            ],
            "content": "- Mr. William E. Evans, Naval Undersea Center, discussed \"Recent observations of abundance and distribution of the common dolphin, Delphinus, in the northeastern Pacific.\""
        },
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            ],
            "content": "17 Mr. Jerome Namias, Research Meteorologist, Ocean - Research Division, Scripps Institution of Oceanography , presented a seminar on, \"An eclectic approach to long- range air and sea prediction.\""
        },
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            ],
            "content": "MEETINGS AND TRAVEL"
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            "content": "March 29- April 6"
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            ],
            "content": "- Dr. Tim Smith of the Marine Mammal Investigations, La Jolla Laboratory, accompanied Mr. J. Blum, Coordinator for Marine Mammals, NMFS, Washington, on a consult- ing assignment to Capetown, South Africa to evaluate status of knowledge for managing fur seal stocks."
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            "content": "April 1-4"
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            ],
            "content": "- Honolulu Laboratory Director Richard Shomura attended a program review held at the La Jolla Laboratory for Dr. William Royce. While in La Jolla, Mr. Shomura also met with Dr. Royce, Mr. Robert Scott, Dr. Rothschild, Mr. Barrett, Mr. Abramson of the Tiburon Fisheries Laboratory, and senior staff members."
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            "content": "4-12"
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            "content": "- Dr. William Perrin of the La Jolla Laboratory attended a meeting of the Small Cetaceans Subcommittee of the Scientific Committee of the International Whaling Com- mission meeting in Montreal, Canada, where he presented a working paper on the distribution and differentiation of stocks of Stenella."
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            "content": "30"
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            "content": "April 8-9 - Ms. Hazel Nishimura, Librarian at the Honolulu Lab- oratory, attended the Pacific Islands Workshop for College Librarians at the University of Hawaii. This working conference was sponsored by the University's Pacific Islands Studies Program under a grant from the U.S. Office of Education to determine the range of Pacific-related material available in the research libraries of Oahu."
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            "content": "10"
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            "content": "- Mr. Sus Kato of the Tiburon Laboratory met with Bill Craig of the SW Region to discuss their contribution to the National Fisheries Plan."
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            "content": "10-11"
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            "content": "- Mr. Shomura participated in a meeting of the Sea Grant Site Visit team at the University of Hawaii. The group reviewed the entire U. H. Sea Grant Program for the coming fiscal year. At an evening executive session they discussed results of the program presentations and developed a set of recommendations. The second morning was devoted to a debriefing session, with feed- back between the panel and the University management team."
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            "content": "16"
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            "content": "- Dr. Brian Rothschild, accompanied by Mr. Barrett and Mr. Squire of the La Jolla Laboratory, and Mr. Norman Abramson of the Tiburon Laboratory, met with California Department of Fish and Game and NMFS Southwest Region representatives in Long Beach to develop policy guidelines for coordinating CF &G-NMFS present and future efforts on recreational fishing."
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            "content": "16-17"
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            "content": "- Librarian Ms. Nishimura at Honolulu, attended a 2-day workshop for Health Science Librarians at the Hawaii Medical Library conducted by the Pacific Southwest Regional Medical Library Service and co-sponsored by the Health Information Network of the Pacific (HINOP) . The Honolulu library is a member of HINOP primarily to utilize the inter-library loan services."
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            "content": "17"
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            ],
            "content": "- Mr. Julio Schwarz, City and County Committee on Aging, met with Mr. Shomura to discuss catfish. He was given some literature by the librarian."
        },
        {
            "spans": [
                {
                    "offset": 71203,
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            "content": "31"
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            ],
            "content": "April 19 - Mr. Pete Benville of the Tiburon Laboratory attended the Hewlett-Packard Seminar on reporting integrators at the University of California Medical School, San Francisco."
        },
        {
            "spans": [
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            ],
            "content": "- Mr. Sus Kato of the Tiburon Laboratory attended the Senate hearings on a Bill regarding extended fishery jurisdiction. The hearings were chaired by Senator John Tunney ."
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                {
                    "offset": 71558,
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            "content": "19-20"
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            "content": "- Librarian Ms. Nishimura attended the annual spring conference of the Hawaii Library Association in con- junction with the Hawaii Association of School Librarians and the Special Library Association at the Ala Moana Hotel."
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            "content": "22"
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            "content": "- A meeting of the U. S. Commissioners of the Inter- American Tropical Tuna Commission (IATTC) was held at the Southwest Fisheries Center auditorium in La Jolla. In attendance from the SWFC were Director Brian J. Rothschild and Dr. William Fox, Leader of the Stock Assessment and Fishery Evaluation Investi- gations at the La Jolla Laboratory. Dr. Fox discussed post-Mexico City alternative management schemes for tuna at the meeting ."
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            "content": "26"
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            "content": "Dr. John Maciolek and Mr. Steven Montgomery, the Acting Chairman and Natural Areas Specialist, respectively, of the Natural Area Reserves Commission conferred with Lt. Bruce Crumley, the Honolulu Laboratory-assigned NOAA Corps Officer. At Mr. Shomura's request, Lt. Crumley had prepared a report for the Commission on the problem and possible solution to designation of sea- ward boundaries of the Ahihi-Kinau Natural Reserve Area."
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            "content": "28"
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            ],
            "content": "- Mr. Lloyd Richards of the Tiburon Laboratory departed for Manchester, Washington to observe salmon pen-rearing operations. He will be the primary Tiburon Laboratory participant for the joint NMFS-U.C. Davis Sea Grant - S.F. Tyee Club - California Fish and Game silver salmon rearing project which will take place at Tiburon this summer. Mr. Richards will also be checking some angling facilities in Puget Sound to insure the accuracy of that portion of the Pacific Angler's Guide."
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            "content": "32"
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            "content": "April 29-30 - Dr. Michael Laurs, Leader of the Albacore Fishery Investigations at La Jolla attended a meeting of the Pacific Marine Fisheries Commission Albacore Coor- dinating Committee in San Diego April 29-30, where he discussed results of the 1973 joint NMFS-American Fishermen's Research Foundation albacore research studies and plans for further studies in 1974, and the uniform west coast albacore logbook."
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            ],
            "content": "30 The Natural Area Reserves Commission, including Mr. - Shomura who received his appointment to the Commission in March 1974, met at the Honolulu Laboratory."
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            "spans": [
                {
                    "offset": 73724,
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            ],
            "content": "VISITORS"
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            "content": "La Jolla Laboratory"
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            "content": "April 2"
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            ],
            "content": "- Mr. John Mulligan, Tuna Research Foundation, Terminal Island, California."
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        {
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            "content": "16"
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            "content": "- Dr. Michael J. Sanders, Fisheries and Wildlife Division, Melbourne, Vicktoria, Australia."
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                    "offset": 73932,
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            "content": "24"
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            ],
            "content": "- Messrs. Ed Rich and Eric Carson, Peterson Associates, a film-making team, for discussions with Dr. Rothschild and Center staff on their proposed film on tuna distribution, for the Law-of-the-Sea Conference."
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            "content": "24-26"
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            "content": "- Mr. T.A. Manar, Chief, Scientific Publications Staff, NMFS, Seattle, Washington."
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            ],
            "content": "- Mr. G.V. Howard, Regional Director, SW Region, Terminal Island, California."
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            "content": "29"
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            ],
            "content": "- Dr. Malvern Gilmartin, Hopkins Marine Station, Pacific Grove, California."
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            "content": "Honolulu Laboratory"
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            "content": "April 1"
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            ],
            "content": "- Mr. John C. Marr, Mardela Fisheries, Honolulu, Hawaii."
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            "content": "12 - Dr. Oswald Roels, Columbia University and City College of New York, and Mr. Robert Wing, Environmental Research Laboratories, Waltham, Massachusetts."
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            "content": "33"
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            "content": "April 16"
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            ],
            "content": "- Mr. Richard Kinney, President, Tunaboat Owners Association, accompanying Maire George Pambrun, Ville de Papeete; Mr. Walter T. Watanabe, Operation Manager, Tahiti Tuna Ventures, S.A .; and Mr. Warren Ellacott, Papeete, Tahiti."
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            ],
            "content": "Mr. Bob Stark, fisherman, Kodiak, Alaska."
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            ],
            "content": "- Mr. Dan Chang and Mr. Paul Devine, fishermen, Honolulu, Hawaii."
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            "content": "17 - Ms. Tina Echeverria, Tiburon Fisheries Laboratory ."
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            "content": "Ms. Fumiko Hasegawa, Seattle, Washington."
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            "content": "April 3"
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            "content": "- Clayton Jensen, Deputy Associate Administrator for Environmental Monitoring, NOAA, Rockville, Maryland."
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            "content": "- John Fageuris, Kaiser Engineers, Oakland, California."
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            "content": "- Brian James, Scripps Institution of Oceanography, La Jolla, California."
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            "content": "- Richard Reasoner, San Rafael, California."
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            "content": "- John Logston, Western Exterminator, Oakland, California."
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            "content": "- Carl Danneth, Western Exterminator, Oakland, California."
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            "content": "15 R. Brown, San Francisco Tyee Club, San Francisco, - California."
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            "content": "- Mr. Robert Crowell, NMFS, Washington, D.C."
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            "content": "- Marv Frey, Provident Mutual Life, San Rafael, California."
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            "content": "- S. W. Tyler, Tyler Construction Co. , Santa Rosa, California."
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            "content": "- Marine Biology Class, Kennedy High School, Richmond, California."
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            "content": "April 22"
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            "content": "Richard Asihn, Sippica Corp. , Manor, Massachusetts."
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            "content": "Daniel Sheehy, University of Rhode Island, Kingston, Rhode Island."
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            "content": "- Karl Jacque, IBM, Santa Rosa, California."
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            "content": "Dr. Edward Klima, NOAA, Washington, D.C."
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            "content": "- Kenneth R. Roberts, NOAA, Washington, D.C."
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            "content": "- Don Stevens, California Fish & Game, Stockton, California."
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            "content": "- Phil Swartzell, California Fish & Game, Stockton, California."
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            "content": "- J. D. Messersmith, California Fish and Game, Sacramento, California."
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            "content": "- R. W. Marvin, Los Altos, California."
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            "content": "- D. Burkhardt, Wang Laboratories, San Mateo, California."
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            "content": "26 Chris Dewees, et al., University of California, Davis, California."
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            "content": "PERSONNEL ACTIONS"
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            "content": "April 2 Bruce Wahlen, Mathematics Technician - - Temporary Appointment - La Jolla"
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            "content": "- Robert Cunningham, Biological Aid, Termination - Lack of Work La Jolla"
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