﻿{"Bibliographic":{"Title":"Southwest Fisheries Center Monthly Report: August 1974","Authors":"","Publication date":"1974","Publisher":"Southwest Fisheries Center (U.S.)"},"Administrative":{"Date created":"06-26-2025","Language":"English","Rights":"CC 0","Size":"0006866719"},
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    "content": "F\nMM\nAR\nMERCE\n*\nUNITED\nAMERICA\nED STATES OF AM\nHONOLULU\nS\nLA JOLLA\nTIBURON\nSOUTHWEST FISHERIES CENTER\nMONTHLY REPORT- AUGUST 1974\nRESEARCH HIGHLIGHTS\nPage\n. Publications 1\n. Scientists Evaluate Feasibility of Collecting and Holding Live Albacore. 3 . Antibiotics Reducing Mortality of Captive Salmon; Fish Showing Good Growth 5\n. Pelagic Red Crabs Constitute Large Untapped Resource in Eastern Pacific. 6\n. Physiological Data Suggest Definition of Limits of Skipjack Tuna Habitat 8 Summary Report of Porpoise Research in Preparation for Commerce Report to Congress 9\n· Report on Results of CF&G/NMFS Cooperative Study on Stock Assessment of Southern California Recreational and Commercial Fisheries Presented to State-Federal Steering Committee 11\n. World Tuna System Study Completed 11\nNational Weather Service Becomes Full-Time Participant in NMFS FAX Advisory Program . 13\n· Northern Anchovy Successfully Reared Through Metamorphosis on Laboratory-Cultured Foods 15\n. Anchovy from Fourth Shipment Reach Hawaii in Excellent Condition. 19\n. Project Proposal Developed for Bureau of Land Management Environmental Study NOAA/NMFS 21\nSOUTHWEST FISHERIES CENTER La Jolla, California\nHONOLULU LABORATORY LA JOLLA LABORATORY TIBURON LABORATORY\nMONTHLY REPORT-AUGUST 1974\nSTATUS OF PUBLICATIONS\nPublished\nBayliff, William H. and Brian J. Rothschild. 1974. Migrations of yellow- fin tuna tagged off the southern coast of Mexico in 1960 and 1969. Bull. Inter-Am. Trop. Tuna Comm. 16(1): 1-64.\nThe map method, the Jones method, the variance-covariance method, and the Skellam method were used to study the migrations of tagged yellowfin tuna released off the southern coast of Mexico in 1960 and 1969. The first three methods are all useful, and each presents information which is complementary to that presented by the others. The Skellam method, as used in this report, is less useful.\nThe movements of the tagged fish released in 1960 appeared to have been strongly directed, but this was probably caused principally by the distribution of the fishing effort. The effort was much more widely distributed in 1970, and the movements of the fish re- leased in 1969 appeared to have been much less directed. The cor- relation coefficients derived from the variance-covariance method showed that it was not random, however.\nThe small fish released in the Acapulco and 10ºN-100°W areas in 1969 migrated to the Manzanillo area near the beginning of February 1970. The medium and large fish released in the same areas in the same year tended to migrate to the southeast throughout the first half of 1970, however.\nHester, Frank J., and Everet C. Jones. 1974. A survey of giant clams, Tridacnidae, on Helen Reef, a western Pacific atoll. U.S. Natl. Mar. Fish. Serv., Mar. Fish Rev. 36(7): 17-22. (MFR paper 1071.)\nThis report does not constitute publication and is for information only.\nTransects and areal surveys by swimmers were used to estimate the standing stock of giant clams, Tridacnidae, at Helen Reef, Western Caroline Islands in March 1972. Estimates were Tridacna crocea 3.7 x 106, T. maxima 1.7 x 106, Hippopus hippopus 44.6 x 103, T. derasa 32.8 x 103, and T. gigas 49.8 x 103. T. squamosa was not as abundant or was identified as T. maxima. Most T. gigas and T. derasa were large, suggesting low or erratic recruitment.\nKorn, S. and R. Earnest. 1974. Acute toxicity of twenty insecticides to striped bass, Morone saxatilis. California Fish and Game, 60(3): 138-131.\nThis paper describes acute toxicity of 20 different insecticides to juvenile striped bass. The insecticides Endrin, Endosulfan, DDT, and Dursban are shown to be most toxic, while Carbaryl and Abate proved least toxic. Fourteen other insecticides were also tested and are listed in order of decreasing toxicity. Some ad- vantages of intermittent versus static bioassay testing are discussed.\nMatsumoto, Walter M. 1974. The skipjack tuna, Katsuwonus pelamis, an underutilized resource. U.S. Natl. Mar. Fish. Serv., Mar. Fish. Rev. 36(8): 26-33. (MFR paper 1077.)\nThe skipjack tuna is the only species of tuna presently exploited commercially that can withstand large increases in fishing pressure. This article describes the biology and ecology of the skipjack tuna in the Pacific Ocean and the distribution of skipjack tuna fisheries, giving recent catch statistics and including assumed movement patterns of Pacific stocks. Opportunities exist for the increased develop- ment of the skipjack tuna resource, a benefit to the economy of the developer nation.\nRothschild, Brian J. 1974. The California gray whale. Introductory remarks California Gray Whale Workshop, Univ. Calif., San Diego, August 21-22, 1972. Mar. Fish. Rev., Spec. No. 36(4): 2.\nApproved by Center Director\n\"Field criteria for survival of anchovy larvae: The relation between inshore chlorophyll maximum layers and successful first feeding\" by Reuben Lasker. For publication in the Fishery Bulletin (U.S.).\n\"The American Samoa longline fishery, 1966-71\" by Howard 0. Yoshida. For publication in the Fishery Bulletin (U.S.).\n2\n\"Recent development in fisheries for skipjack tuna, Katsuwonus pelamis, in the central and western Pacific and Indian Oceans\" by Richard N. Uchida. [A draft report forwarded to the Center Director for the IOFC/IPFC Working Party on Tuna Stock Assessment, 16-18 September 1974, Nantes, France.]\nALBACORE FISHERIES INVESTIGATIONS\nScientists Evaluate Feasibility of Collecting and Holding Live Albacore\nDuring the July-August cruise of the Jordan, efforts were made to evaluate the feasibility of collecting and holding live albacore, which included the testing of a life support system designed to transport albacore under anesthesia, testing of various anesthetics and dosages, and development of methods for handling fish to be placed under anesthesia and reviving anesthetized fish. The objective is to be able to study the response of live animals to their environment.\nAccording to Dr. R. Michael Laurs, who conducted the experiments, the life support system on the Jordan, which accommodated up to four fish, consisted of about a 100-gallon rectangular, fiberglass tank, equipped with pump- tubing/mask arrangement which was used to force water over the gills of anesthetized fish held in slings suspended in the tank. MS 222 (tricane methanesulfonate), a common anesthetic used on fishes, was dissolved and oxygen gas bubbled into the water pumped over the fishes' gills. A recycling water chiller was used to maintain the desired water temperature.\nSix jig-caught and two live-bait caught fish in good condition were selected as test animals in the live transport study. Tests were conducted using MS 222 alone and in combination with Flaxedil for anesthetizing the fish. Best results were obtained using MS 222 alone at a concentration of approxi- mately 2 milligrams per gallon of seawater. Data were also collected on the time required to anesthetize albacore and also to recover from anesthesia with good vital signs for periods in excess of 15 hours.\nAn unfortunate event occurred near the end of the cruise while transport- ing four live fish under anesthesia in the life support system back to shore. A freshly charged 12-volt DC battery used to power the pump in the life support system failed during the night and the fish died of suf- focation.\nBased on data collected during this cruise, Dr. Laurs believes that it is feasible to hold and transport albacore tuna under anesthesia and that the life support system designed for this is suitable except for a minor modi- fication -- incorporation of a converter to use ship's power to operate the pump.\n3\nScientists on Jordan Conduct Studies on the Nearshore Availability of Albacore off Southern California and Related Environmental Conditions\nFor the past several years, including this year, the annual albacore fishery forecast issued by the La Jolla Laboratory has indicated that the major portion of the albacore catch for the season would be taken in waters north of San Francisco. The forecasts have been accurate in that the major portions of the seasonal catches for the last several years have been from \"northern\" waters. Partly in response to the NMFS fore- casts, most of the albacore vessels have moved to \"northern\" waters early in the season, leaving a void in fish scouting and fishing effort in southern California where albacore catches were high many years ago.\nAs part of an evaluation of the albacore seasonal forecasts, efforts were made this season to determine the availability of albacore in northern Baja-southern California waters. Fish scouting/oceanographic observations were conducted by three commercial albacore jig fishing vessels on charter to the American Fishermen's Research Foundation working cooperatively with the La Jolla Laboratory, and fish scouting/oceanographic observations and other studies were conducted from the NOAA research vessel, Jordan, during July and August 1974. The fishing vessels on charter to AFRF worked the area from off San Diego south to Guadalupe Island and northward outside the Channel Islands. No commercial concentrations of albacore were found by the fishing vessels.\nThe Jordan worked the area off San Diego out to San Juan Seamount and in the vicinity of the Channel Islands. Scouting efforts on the Jordan con- sisted of trolling eight lines from dawn to dark, and visual watches from the wheelhouse for signs of fish. No commercial concentrations of albacore were sighted or caught during the Jordan cruise. However, small catches, mostly 4-6 pound fish, were made in the vicinity of San Juan Seamount.\nA total of 31 albacore was caught during the cruise. Length and weight measurements were taken on all the fish. Complete digestive tract and heart plucks were collected from 15 fish for Dr. Ted Folsom of Scripps Institution of Oceanography for radionucleide study. Heads were collected from 10 fish for removal of otoliths ashore for aging studies being con- ducted at the Honolulu Laboratory.\nCOASTAL FISH COMMUNITIES INVESTIGATIONS\nChanges in Food Habits with Size Studied in the Shiner Surfperch, Cymatogaster aggregata\nDr. Edmund Hobson, Project Leader at the Tiburon Laboratory, working with Fishery Biologist Tony Chess, continued to concentrate this month on feeding behavior of juvenile fishes in the continued investigation of near- shore fish communities. Work this month centered on the shiner surfperch, Cymatogaster aggregata, which is among the most widespread of the surfperches, an important group of sport fishes.\n4\nThe shiner surfperch has been found to feed only by day when it is a small juvenile, and to feed by night as well when it grows larger. This situation is similar to that described last month for the olive rockfish, Sebastes serranoides. The shiner surfperch, however, experiences this behavioral change at a slightly larger size -- about 70 mm, as compared to about 60 mm for the olive rockfish. Furthermore, the larger shiner surfperch continues to feed regularly by day in addition to feeding at night, whereas the larger olive rockfish becomes predominantly nocturnal. These differences in behavior between the two species are being related to morphological characteristics, and to the way these fish capture prey and the nature of their prey. The observations are also being related to the distribution of prey in the water column during both day and night, as determined by the plankton sampling described earlier.\nCOASTAL FISHERIES INVESTIGATIONS\nAntibiotics Reducing Mortality of Captive Salmon; Fish Showing Good Growth\nMr. Lloyd Richards, Biological Technician, reports that the coho salmon rearing program, a cooperative project of the Tiburon Laboratory and Sea Grant, California Department of Fish and Game, and San Francisco TYEE Club (a conservation-oriented sport fishermen's group) has continued to generate interest in the Bay Area. A second TV station featured the rearing program in the evening news.\nOf the original 10,000 fish stocked in our pen in early July, about 7,500 remain. Mortality has been about 25 fish per day, during an outbreak of bacterial disease when 230 fish died in 3 days. Pathologists of the Cali- fornia Department of Fish and Game diagnosed the bacteria as Bacillus columnaris. After a week's treatment with terramycin, included in the feed, the mortality rate dropped to \"normal.\"\nStan Smith, a volunteer worker and student from San Francisco State University, has been heavily involved in the program. As part of his thesis work, he has been monitoring levels of oxygen, salinity, temperature, and pH within and outside the rearing pen. Of greatest concern is the drop in oxygen level down to 5.3 ppm in the pen during early morning hours. The range has been within 5.3 and 7.9 ppm. Temperature has ranged between 62-69º and salinity 23-30 ppm.\nNet clogging remains the principal problem. Brown, green, and red algae proliferate, and recently hydroids and barnacles have also become a nuisance. Two water pumps provided by the TYEE Club have been installed to increase the exchange of water in the pen. Two automatic feeders have also been installed. The present daily ration of feed is approximately three percent of the total weight of the fish, which are showing good growth and appear to be in good condition.\n5\nPelagic Red Crabs Constitute a Large Untapped Resource in the Eastern Pacific\nOne of the primary uses of red crabs is as a feed ingredient in salmonid aquaculture, primarily to pigment the flesh of salmon. Most of the feed- ing experiments conducted to date have been with coho salmon. Experiments were started this month under the direction of Mr. Sus Kato, Fishery Biologist, at the Tiburon Laboratory, at a commercial trout farm to attempt to pigment the flesh of rainbow trout, and to then do a market analysis to learn the acceptability of the product.\nOne group of 50 trout are being fed specially formulated red crab feed provided by Pacific Fishery Products Technology Laboratory. A second group of fish are being fed vacuum-dried whole red crabs as a supplement to the regular diet, and a third group will serve as control.\nA few fish will be sacrificed at the end of the month to determine if the flesh of the trout have become pigmented. The experiment is being con- ducted at the Garrapata Trout Farm, located near Carmel.\nNearly all the commercial firms rearing salmon now want red crabs, accord- ing to Mr. Kato. Additionally, a researcher at San Diego State University reported that lobsters reared on a diet of red crab show signs of good vitality and growth.\nMr. Kato went to Fort Bragg, together with Dr. M. Miyamura, Fishery Con- sultant for Japan Air Lines. They conferred with heads of two firms which are interested in processing sea urchins. Prospects of marketing unused species and by-products were also discussed.\nAngler's Guide to the United States Pacific Coast\nDuring August work continued on the Angler's Guide being prepared by Fishery Biologist Jim Squire, La Jolla Laboratory, and Susan Smith, Publications Specialist at the Tiburon Laboratory. The Guide describes the marine sport fishes, fishing grounds, and angler facilities along the Pacific Coast from California to Alaska and around the tropical islands of Hawaii, American Samoa, and Guam.\nMs. Smith spent most of the month preparing the Guide's two descriptive fish lists for final typing, drawing fish illustrations, and preparing a common name index for species described in the fish lists. These two lists (one describing sub-tropical and temperate zone fishes -- the other tropical fishes) will contain over 200 fish illustrations, and at the end of the month all but 10 of these illustrations were completed. The index- ing of over 600 common names of fishes was also completed and submitted for typing.\n6\nFISH ENVIRONMENT INVESTIGATIONS\nActivity of Tunas in Rapidly Cooling Water Investigated in Doughnut Tank\nThe Life Studies Program of the Honolulu Laboratory has as its long-range goal the generation of a predictive model of tuna distribution, abundance, and availability to fisheries. The model is to be based on the joint physiological and behavioral responses of tunas to environmental variables, determined in part through experimental work with captive fishes. To ex- plore the potential value of such an approach and to provide an objective framework for further experimental work, Drs. William H. Neill and Andrew E. Dizon, Fishery Biologists with the Honolulu Laboratory, have developed a simulation model for the responses of fishes to temperature, a variable of recognized importance in the ecology not only of tunas but also of fishes in general.\nImportant inputs to the model are the functional relationships between swimming activity of fish and thermal structure of the environment. Drs. Dizon and Neill are conducting a series of cooling experiments in the doughnut tank to establish such relationships for tunas. Water temper- ature is decreased from 27°℃ at about 0.05℃ min-1 while swimming speed and turning tendency of the tunas are monitored.\nExperiments with eight skipjack and two yellowfin tunas have been conducted. Both species consistently and dramatically increased their rate of turning when tank temperature decreased to 21.5º-20.5°C. However, swimming speed of skipjack tuna tended to be almost between 27° and 19℃, whereas yellow- fin tuna swam slower (Q10=2.2) as' the water cooled.\nEffects of Temperature on Routine Metabolism of Skipjack Tuna\nProductivity of the seas in terms of tuna flesh must depend on whether food supplies are adequate to provide the energy required by tunas for activity and growth. Research Assistants Randolph Chang and Bernard Ito, under the supervision of Dr. William Neill, all of the Honolulu Laboratory, are extending previously completed experiments on routine metabolism of skipjack tuna at a single temperature (24℃) to temperatures throughout the skipjack tuna's zone of thermal tolerance. This will permit estima- tion of the energy required for minimum activity in skipjack tuna at all temperatures where the fish are likely to occur.\nExperiments at 18°, 24°, and 29℃ have now been completed. Results can be summarized as follows:\n7\nTemperature ℃\nNumber of tests\nRespiration rate (mg 02 g-1 hr-1)\nMedian\nRange\n18\n14\n0.66\n0.42-1.03\n24\n6\n0.71\n0.58-0.79\n29\n10\n0.78\n0.64-1.25\nThus, routine metabolism of skipjack tuna appears only weakly temperature- dependent, the Q value being between 1.1 and 1.2. This conclusion is consistent with that reached by M. Gordon [Science 159: 87-90, 1968] through respirometric study of minced red and white muscle from skipjack tuna.\nFrom the energetics standpoint, these data suggest that skipjack tuna re- quire (for minimal activity) only about 20% more energy in the warmest parts of their habitat than in the coolest parts. The near-independence of skipjack tuna metabolism and temperature stands in marked contrast to the situation for virtually all other fishes, whose demand for energy typically doubles or trebles for each 10°℃ increase in temperature.\nPhysiological Data Suggest Definition of Limits of Skipjack Tuna Habitat\nPhysiological data obtained recently in experiments and simulation studies conducted by the Life Studies Program of the Honolulu Laboratory are being used to shape answers to the long-standing question of why there are no big skipjack tuna in the eastern Pacific Ocean. These data are being used to define the geographic areas the skipjack tuna can be expected to inhabit on the basis of extremes in temperature and other parameters. Results so far indicate that the smaller skipjack tuna, less than 3 kg or 50 cm in size, can inhabit virtually all of the eastern tropical Pacific above the oxycline. Areas from which larger fish are excluded increase in size with the size of the fish. Fish weighing 8 kg, 70 cm long, are excluded from an area which extends from Cabo Corrientes or San Blas to 145°W, 10ºN, and from there to Panama. Fish of intermediate size are excluded from most of this area, but can move north-south along a 100-mile corridor slightly offshore of Mexico, between the Gulf of Tehuantepec and the Gulf of California. This corridor probably closes seasonally, and may close entirely in some years.\nFishery Biologist Heeny Yuen, who coordinated the work of the SWFC Honolulu Laboratory at the 16th annual Hawaiian International Billfish Tournament held in July, has completed his report of the tournament. This includes a cursory analysis of the scientific information collected by the NMFS team under Mr. Yuen's direction.\n8\nBiological Aid Elliott Kawahara has completed plotting the results of longline catches of black marlin in the Pacific and Indian Oceans accord- ing to Japanese records for the years 1962-71.\nMARINE MAMMAL INVESTIGATIONS\nSummary Report of Porpoise Research in Preparation for Commerce Report to Congress\nThe entire scientific staff of the Marine Mammal Investigations at the La Jolla Laboratory is devoting maximum effort to the completion of a report due in early September summing up the progress of research under- taken since the beginning of the accelerated porpoise program at the Southwest Fisheries Center almost 2 years ago. This report will be sub- mitted to NMFS for incorporation in the Secretary of Commerce's report to Congress in conformance with the provisions of the Marine Mammal Pro- tection Act of 1972. Items to be covered in the comprehensive report will include results of porpoise life history studies, estimates of porpoise mortality, population estimates derived from the aerial survey, marine mammal watch, development and application of porpoise-saving fishing gear, assessments on the performance of the tuna fleet in alleviating por- poise mortality, and recommendations for future porpoise research.\nDr. Eric Barham, Porpoise Program Manager, plans to hand-carry the com- pleted report to Washington, D.C. on September 9 for final review.\nDr. Eric Barham, Porpoise Program Manager at the La Jolla Laboratory, reports that Mr. Jerry Jurkovich of the NMFS Northwest Fisheries Center, who has been aboard the seiner, South Pacific, observing the performance of the NMFS-designed, large-volume tuna purse seine net, returned to San Diego on September 1. Mr. Jurkovich is well-satisfied with the per- formance of the experimental purse seine which appears to be effective in reducing porpoise mortality. Preliminary inspection of Mr. Jurkovich's data indicates a low kill rate on 37 porpoise sets.\nThree NMFS porpoise observers remain at sea on tuna seiners of the U.S. fleet. An observer is aboard a vessel operating off the coast of Brazil; another is on a seiner fishing outside the Commission Yellowfin Regulatory Area (CYRA) and the third is on a boat still fishing inside the CYRA.\n9\nPHYSIOLOGY INVESTIGATIONS\nExperiments Indicate Rapid Uptake of Benzene in Anchovy Larvae and Adults\nAs part of the study of effects of crude oil components on various life stages of fishes, investigator Sid Korn, Fishery Biologist, assisted by Nina Hirsch, Biological Technician at the Tiburon Laboratory, are studying uptake and accumulation of benzene by the northern anchovy. Results of this month's experiments indicate that benzene accumulates very rapidly in certain tissues of larval and adult anchovies.\nNewly hatched anchovy larvae were exposed to a concentration of 14\n*C-labeled benzene for 24 hours. After 6 hours the accumulation appeared to be 60X that of initial exposure levels, and after 24 hours levels rose by a factor of 100X. Although there is a possibility of sample contamination due to inadequate rinsing of the surface film on the larvae, in view of the results of subsequent experiments with adult fish, these values do reflect a very high rate of accumulation. New techniques are being evolved to counteract the possibility of sample contamination.\nAdult anchovies were acclimated for 2 weeks, then exposed to 7 ppm benzene for 1.5 hours. Measurements were made of levels in the liver, muscle, brain, and gill tissues using the Gas Chromatograph and the scintillation counter. At present, the Gas Chromatograph measures only benzene, while the scintil- lation counter measures all 14C-labeled components and does not distinguish between 14℃ benzene and 14C metabolites of benzene (such as phenols). After only 1-1/2 hours of exposure, levels in the liver, brain, and gill tissue measured by the G.C. method were found to be 6X to 8X the level of initial exposure, and as high as 15X (Tiver tissue) using the scintillation counter. Mr. Korn is now working on a method of identifying and measuring the highly toxic phenols and other benzene metabolites using G.C. analysis.\nBecause the remaining anchovies from the above experiment died within several hours after exposure, a follow-up bioassy was conducted with adult fish. A 24-hour TL50 of approximately 4 ppm benzene was determined. It is possible that this low level may be due to the sensitivity of anchovies to stress in captivity, so the bioassy will be repeated after the fish have undergone a longer period of acclimation. Subsequently, another uptake study will be conducted at concentrations lower than 7 ppm.\nThe first in a new series of experiments testing the effects of meta-xylene on northern anchovy embryos and larvae was initiated. Pre-gastrulated embryos were exposed to three initial concentrations of meta-xylene (5, 10, 20 ppm) for 24 hours. Results of exposure of pre-gastrulated embryos will be compared with those from exposure after gastrulation in an attempt to determine whether the change in membrane permeability with gastrulation is correlated with differences in hatch and survival of embryos.\n10\nAnalyses of data on the effects of benzene on juvenile striped bass, steelhead trout, and adult herring have been completed. A manuscript is in preparation.\nSTOCK ASSESSMENT AND FISHERY EVALUATION INVESTIGATIONS\nReport on Results of CF&G/NMFS Cooperative Study on Stock Assessment of Southern California Recreational and Commercial Fisheries Presented to State-Federal Steering Committee\nMr. Alec MacCall, Fishery Biologist, California Department of Fish and Game and Dr. Gary Stauffer of the La Jolla Laboratory, presented the results from the \"Report on CF&G/NMFS Cooperative Stock Assessment, Fishery Evaluation, and Fishery Management of Southern California Recre- ational and Commercial Fisheries,\" to members of the State-Federal Steering Committee and fishery biologists from CF&G and the Southwest Fisheries Center on August 8 at the Center. Mr. Robert Ayres, coordinator of game fish programs from NMFS, Washington, also attended. Comments and sugges- tions on the report were solicited.\nA second presentation of this report embodying suggestions and modifica- tions received at the earlier meeting is now scheduled for September 10 at the California Department of Fish and Game Laboratory in Long Beach. The Steering Committee plans a meeting in early October to recommend specific tasks for. the CF&G/NMFS cooperative project for the coming year. Chaired by Mr. John Radovich of CF&G, the Steering Committee also includes Messrs. Gerald Howard, Norm Abramson, and Brian Rothschild of NMFS and Messrs. R. Kaneen and E. Greenhood of CF&G.\nMr. Bruce Wahlen, Mathematics Technician at the La Jolla Laboratory, com- pleted the figures for a manuscript using computer graphics on ex-vessel prices of commercial fish in southern California. The manuscript, intended for the Marine Fisheries Review, will document the 1941-72 time series of commercial catches, ex-vessel price and prices adjusted by wholesale price index, reflecting the economics of commercial fisheries in this area.\nSWFC'S World Tuna System Study Completed\nAn analysis of tuna fishing problems, from both a U.S. and world view, was begun at the SWFC in order to clarify existing problems, to decide what could be done about them, and to determine what criteria should be applied in evaluating the wide range of suggested solutions. Included in the study is an examination of the dynamics of three major surface tuna fisheries, those in the IATTC regulatory area (CYRA), west of the\n11\nCYRA, and in the eastern tropical Atlantic. With the help of Dr. Brian Mar, Professor of Civil Engineering at the University of Washington, a prototype computer model was constructed and utilized to evaluate some potential management problems in terms of the economics of the U.S. fishing fleet. The results of the dynamic modeling effort as well as a dicussion of the tuna problems, solutions, criteria, and research needs are included in the report \"Systems Analysis of the U.S. and World Tuna Management Prob- lems with Some Recommendations for the NMFS Program.\"\nOrganized by Dr. William Fox, SAFE Investigation Leader at the La Jolla Laboratory and Mr. David Mackett, SWFC Planning Officer, the study began on July 9 and 10 with a meeting of industry, government, IATTC and inde- pendent experts. The work continued throughout the remainder of July and well into August. Much of the modeling work, and the final draft report were completed by Mr. Daniel Huppert, Industry Economist, with the help of Mr. K. Brennecke, Mathematical Technician.\nSAFE Staff Prepares Working Paper for European Tuna Meetings\nThe staff of the SAFE Investigations, headed by Dr. William Fox, has been devoting its efforts almost exclusively to producing working papers and documents in connection with the forthcoming series of meetings scheduled in Nantes, France and Copenhagen, Denmark in September 1974 on matters dealing with U.S. membership in the International Commission for the Con- servation of Atlantic Tunas, the Atlantic bluefin fishery, and with tuna stock assessment on a worldwide basis.\nDr. Fox prepared a working document entitled, \"An overview of production modeling\" for presentation to the ICCAT Workshop on the Population Dynamics of Tuna,\" to be held at Nantes, France, September 2-13. Dr. Rothschild has written a draft working paper entitled, \"Issues in population dynamics of tunas\" for this same meeting. This meeting will be in two sessions -- the first, with a selected group of eight specialists in the field of population dynamics to consider present and future studies in the field. and the second meeting, with tuna researchers from various countries to whom the results of the first session's deliberations will be presented. Dr. Rothschild, as Chairman of the ICCAT Standing Committee on Research and Statistics (SCRS) is Convenor of the Workshop, and Dr. Fox is a member of the selected group of specialists.\nFollowing the Workshop, FAO will be holding a meeting of the Indian Ocean Fishery Commission/Indo-Pacific Fisheries Council Ad Hoc Working Party of Scientists on Stock Assessment of Tuna, also in Nantes. Drs. Rothschild and Fox are members of the Working Party.\nDr .. W. Lenarz, Fishery Biologist and Mr. J. Zweifel, Mathematician, with considerable assistance from Mr. A. Coan, Mathematician, all of the La Jolla Laboratory, completed a manuscript entitled, \"A theoretical examination\n12\nof some aspects of the interaction between longline and surface fisheries for tunas.\" This paper will be presented to the IOFC-IPFC meeting at Nantes by Center Director Brian Rothschild.\nAs recommended at the last ICCAT/SCRS meeting, a joint meeting of ICCAT and ICES bluefin tuna working groups will be held in Copenhagen on September 29, preliminary to the 62nd ICES meeting there September 30- October 10. Dr. Fox, as an expert on U.S. bluefin tuna research, will participate in this joint meeting. Dr. Fox will present a paper by Dr. Gary Sakagawa, Fishery Biologist at the La Jolla Laboratory, entitled, \"The purse seine fishery for bluefin tuna in the northeastern Atlantic Ocean.\" Dr. Fox is also collaborating with Dr. Grant Beardsley of the NMFS Southeast Fisheries Center, Miami on a working document on the status of Atlantic bluefin.\nDrs. Rothschild and Fox also plan to consult and visit with fellow re- searchers in the tuna and population dynamics fields in government fisheries research laboratories in France and at FAO in Rome.\nMessrs. Lenarz, Coan and Zavala-Camin, visiting researcher from Brazil, completed most of a cohort and production model analysis for North Atlantic albacore. A manuscript is being prepared for presentation to the ICCAT meeting in Madrid, Spain, slated for November 1974.\nMr. Luis Zavala-Camin, scientific researcher on a training mission from the Instituto de Pesca, Santos, Brazil, has completed his assignment at the La Jolla Laboratory. During his stay here he compiled and analyzed data from a tuna longline fishery of southern Brazil under the guidance of Dr. Gary Sakagawa, Fishery Biologist. He plans to submit his study of the fishery as a working document to ICCAT in November. He also re- ceived instructions on the basic techniques of stock assessment from Dr. William Lenarz. To gain practical experience he worked on a stock assess- ment of North Atlantic albacore with Dr. Lenarz and Mr. Coan. Mr. Zavala will spend most of September at the SWFC's Honolulu Laboratory to observe experimental work being conducted on tunas. He will then return to Cali- fornia to attend the Tuna Conference at Lake Arrowhead in early October before returning to Santos.\nNational Weather Service Becomes Full-Time Participant in NMFS FAX Advisory Program\nMr. L. Eber, Fishing Information Systems Task Leader, reports that the National Weather Service (NWS) became a full-time participant in the NMFS radio facsimile (FAX) advisory program in August 1974, pursuant to agree- ments reached earlier between the respective directors of NMFS and NWS. To implement NWS participation, a data line was established between the\n13\nNWS Forecast Office, Redwood City and SWFC, La Jolla, with a drop to NMFS-licensed radio station WWD also in La Jolla. The line is used for transmission of wind and weather, and sea state forecast charts prepared by NWS. For several weeks the NWS charts were broadcast from WWD to the tropical tuna fishing fleet on weekends, to fill a gap in the SWFC trans- missions. During this period, the NWS charts were recorded at SWFC for evaluation of format compatibility and of depiction of significant forecast elements such as incipient tropical storms and the intertropical convergence zone.\nBeginning in August, the NWS FAX charts have been broadcast from WWD daily. Surveillance of wind, weather and sea conditions in the eastern tropical Pacific has been continued by SWFC personnel, however, because of SWFC interest in maintaining a high level of cooperation from tuna fishermen in observing and reporting environmental data in exchange for the advisory services. The surveillance enables SWFC to supplement the FAX charts with verbal advisories when appropriate and to respond to direct requests from tuna vessels for information in specific situations.\nSWFC environmental scientists will continue to prepare and broadcast weekly FAX charts of sea surface temperature and mixed layer depth. These charts provide environmental information to the tuna fisherman on an experimental basis, to enlist his participation in developing the potential application of such information to fishing strategy.\nSTOCK AND RECRUITMENT INVESTIGATIONS\nRecipient of National Research Council Research Associateship to Study Schooling Behavior of Squid at La Jolla Laboratory\nDr. Ann Hurley, Animal Behaviorist, is the latest recipient at the La Jolla Laboratory of a National Research Council Senior Research Associateship, awarded by NOAA and NMFS. During her 12-month stay at the laboratory, Dr. Hurley plans to examine the importance of various types of visual stimuli on the schooling of squid (Loligo opalescens) and will attempt to examine the development of schooling behavior using the facilities of the La Jolla Laboratory's salt water aquarium where squid can be main- tained. The Research Associateship at the Center provides an opportunity for post-graduate scientists to work on basic research problems with pro- fessional staff at the Laboratory.\nAccording to Dr. Hurley the squid is important in the pelagic food web off the California coast. It is a predator on many species of small fish and crustaceans and is itself a food item in the diet of larger fish and marine mammals, and increasingly serves as an abundant and nutritious protein source for man. The squid forms large schools in open water and migrates to shallow water to spawn, often in the vicinity of the laboratory.\n14\nThere is a small commercial fishery for squid in California and most fishery biologists agree that it is presently an underutilized fisheries resource.\nThe mechanisms which cause squid to form large schools and to maintain their orientation within a school have not been studied in squid, Dr. Hurley said. She thinks that vision probably provides the primary sensory input for school- ing behavior and also appears to be important in other social interactions. She also noted that the survival value of schooling in fish has been con- sidered but its use to squid or other pelagic invertebrates is unknown. Schooling in squid may be important as a mechanism to escape predators, or its main function may be to form breeding groups which migrate inshore to spawn. Dr. Hurley hopes that her work on comparisons of schooling in fish and squid may give clues to physiological mechanisms involved in schooling and the ecological importance of schooling to both groups of animals.\nThe first woman to receive a National Research Council Fellowship at the La Jolla Laboratory, Dr. Hurley, 28, is a graduate of Stanford University and received her Ph.D in biological oceanography from the University of California, San Diego in 1972. Recently, Dr. Hurley held a position as a post-graduate research neuroscientist at the University of California, San Diego where she conducted experiments to determine the feasibility of experiments on squid both on board ship and in the laboratory at the Scripps Institution of Oceanography. She has examined the mating behavior of Loligo while on a 3-week cruise aboard the University of California research vessel, Alpha Helix, and has also observed spawning squid during scuba dives.\nThis month, Dr. Hurley completed arrangement of an experimental setup in .. the SWFC aquarium for studying schooling behavior. This includes a large circular holding tank and a 6 x 8 m rectangular tank in which the squid can be photographed with a 35 mm camera with motor drive. She has also completed the writing of computer programs for analysis of schools of two, three, or six squid.\nNorthern Anchovy Successfully Reared Through Metamorphosis on Laboratory-Cultured Foods\nThe growth rate of northern anchovy is an essential element in any model designed to interpret year class success or estimate larval survival. The difficulty in obtaining information on growth rates has always been that it has not been possible to rear these fishes through metamorphosis in a controlled laboratory environment with known kinds and quantities of food. This month, Fishery Biologist John Hunter, assisted by Biological Technician C. Sanchez, at the La Jolla Laboratory, report that they have successfully reared northern anchovy (Engraulis mordax) from the egg through metamorphosis on a diet composed entirely of laboratory-cultured foods, culminating a series of rearing studies at the La Jolla Laboratory designed to develop culture procedures for rearing anchovy larvae. In the past anchovy could not be reared past about 20 days on cultured foods.\n15\nIn 1970 Kramer and Zweifel recorded the growth of anchovy larvae at 17 and 22°℃ for periods up to 35 days, at which time the larvae reached an average length of 17 mm. In their experiments larvae did not reach metamorphosis which occurs at about 35 mm. The larvae were fed wild plankton supplemented by brine shrimp napulii (Artemia salina). In the ensuing years culture techniques using laboratory-cultured foods for larval anchovy gradually developed: The dinoflagellate, Gymnodinium splendens for the first 5 days (Lasker, et al.); the harpacticoid copepod, Brachionus plicatilus (Theilacker and McMaster), to about 20 days during which time the fish grew to about 10 mm. During the last year, Dr. Hunter and Ms. Sanchez were successful in culturing the copepod, Tisbe furcata, which supplied the missing link, that is, provided a food other than Artemia for larvae older than 20 days (greater than 10 mm). In all previous attempts larvae gradually died when fed Artemia (the so-called \"Artemia syndrome\"), and what remained to be done was to find a cultured food that could be used for larvae larger than 10 mm.\nFoods used by Dr. Hunter in rearing included Gymnodinium, Brachionus, Tisbe and Artemia. Metamorphosis occurred 72 days after hatching at a rearing temperature of 16℃. Fifteen larvae were removed every other day during the rearing period to measure the growth rate and these data will be used in various mathematical models under development at the Center. No previous growth data existed for anchovy reared to metamorphosis under known environmental conditions. Of the 3,000 eggs originally stocked in the tank, 13% survived to metamorphosis.\nDr. Ahlstrom, Senior Scientist at the La Jolla Laboratory, reports that projects continued on working up life history series for the Handbook on Fish Larvae of the California Current. One of the workers on this project, Ms. April McLean, will be terminated owing to reduced funding of the Smithsonian contract. Ms. McLean has been preparing meristic and morpho- metric tables on bothid flatfish larvae, presently Syacium ovale.\nThe manuscript by Ms. Elizabeth Stevens, Biological Technician and Dr. Ahlstrom, dealing with neuston (surface) collections made on extended David Starr Jordan cruise 7205, will not be submitted to the International Council for the Exploration of the Sea as originally planned, but will be prepared for presentation at the California Cooperative Oceanic Fisheries Conference instead.\nDr. H. Geoffrey Moser, Fishery Biologist at the La Jolla Laboratory, reports that progress continues on the guide to the identification of eastern Pacific scorpaenid larvae. The section of Ectreposebastes and Scorpaenodes was completed and the section on the genus Scorpaena is presently being prepared. Scorpaena guttata is a high quality food fish in the San Diego\n16\narea and the larvae occur in nearshore plankton tows off southern California and Baja California. The illustrations of the larvae of S. guttata are com- pleted and the descriptions are near completion. Larvae of another species of this genus, S. sonorae, will also be described in this paper; the illus- trations have already been completed. The only remaining genus to be described , for the identification guide is Pontinus.\nWork on the trawl collections resulting from the cooperative project with Dr. C. Matthews of the University of Baja California continued during the month of August. Summer students Elaine Carlin and Jack Christian sorted, identified and took basic meristics of fishes representing almost half of the collection made by Dr. Moser during the Februrary expedition to Magdalena Bay.\nMr. K. Lal, California Department of Fish and Game Biologist is working with Dr. Lasker at the La Jolla Laboratory to induce spawning and captivity of striped bass held in seawater. The experiment on rearing of striped bass larvae in increasing salinities was terminated after 40 days. During this period, 1-day old larvae hatched in fresh water were passed through a salinity gradient, until they reached 100% seawater, when 33 days old. The larvae survived well in 60% seawater, but after acclimation to 80% seawater, when 29 days old, mortality shot up for some unknown reason.\nAdult striped bass were continued to be held in four experimental tanks in seawater under constant temperature (19°℃) and photoperiod (15L:9D). Biopsy showed that the females found in tank I with mature eggs above 0.5 mm diameter in July 1974, had regressed instead of developing further. The number of ripe males in tank IV also decreased from 9 to 3.\nFurther observations on the effect of red light were discontinued. The light intensity in all the tanks was reverted to 60 watts daylight and 12 watts night light. The length and weight of all fish was recorded. Five fish with stunted growth and 14 fish with sex yet undetermined were removed from the experimental tanks and the remaining tagged fish were regrouped as follows :\nTanks\nI\nII\nIII\nIV\nTotal\nRemarks\nNo. of males\n10\n10\n10\n2*\n32\n*2 lost tag\nNo. of females (mature)\n8\n8\n8\n4*3*\n31\n*3 lost tag\nNo. of females ( immature)\n3\n3\n3\n18+4*\n31\n*4 lost tag\nTotal\n21\n21\n21\n31\n94\n17\nDiscussions were held with Dr. Lasker regarding experimental work for the year 1974-75. A new experiment was launched on August 24, 1974 which has the objective to achieve maturation and spawning of striped bass out of season and before the end of 1974.\nSURVEY SYSTEMS ANALYSIS INVESTIGATIONS\nScientists on Jordan to \"Calibrate\" Acoustic System for Biomass Assessment\nOn August 19, the NOAA research vessel, David Starr Jordan, left San Diego to work for 4 weeks in the Los Angeles Bight with two wetfish purse seiners, the Southern Explorer and Rigel, under contract to NMFS, and with an air- plane spotter. Cruise Leader is Lt. R. Hewitt of the NOAA Corps, on detail to the La Jolla Laboratory. Purpose of the cruise is to \"calibrate\" the acoustic system aboard the Jordan which has the capability to count and measure anchovy fish schools and determine their target strength. When fish schools are located by the plane, the Jordan locates them with its sonar and the purse seiner moves in to capture the same school, to confirm the sonar measurements. The California Fish and Game research vessel, Alaska, also equipped with calibrated sonar and sounder is collaborating in the project. The unique experiment, sanctioned by the California Fish and Game Commission, permits the taking of 2,500 tons of anchovies outside the regular commercial fishing season.\nReports from Lt. Hewitt indicated that during the first half of the sonar mapping experiment, 48 purse seine resulted in the capture of 1,220 tons of anchovy previously measured automatically by the mini-computer aboard the Jordan. The purse seine effort has been allocated to nine categories, three each for fish school physical size in the horizontal plane and apparent compaction and thickness of the schools in the vertical plane. The fish schools landed thus far fill two of the nine categories in the larger school, compact portion of the matrix. No comparison has yet been made of the computer-derived index of school biomass and biomass estimated by the purse seine skipper.\nThe joint operation with the chartered seiners should provide a firm base of information correlating target strength with school compaction. This information will be used for conducting the first automated hydroacoustic survey in the Los Angeles Bight, with anchovy as the target species, during the last 2 weeks of the cruise.\nManual of Methods for Pelagic Fish Egg and Larva Surveys Nears Completion\nA final 350-page draft of a manual of methods titled, \"Standard Techniques for Pelagic Fish Egg and Larva Surveys,\" edited by Dr. Paul Smith, Leader of the Survey Systems Analysis Investigation at the La Jolla Laboratory, has been completed under contract with the Food and Agriculture Organization\n18\nin Rome. It is being circulated to 35 specialists and students for final comments before being sent to FAO in Rome for publication. Dr. Smith has edited previous contributions to an earlier edition of this manual and has now added illustrations and examples to aid specialists in developing this technique in other countries.\nThe text of the manual, based on materials presented during a training course on larval fish at the La Jolla Laboratory last year, includes two sections: one on the practical aspects of conducting an egg and larva survey and one on the theoretical basis for interpreting the survey data. The recommendations include use of a simple bongo net in a slow, oblique tow for optimum economy of operation and capture and retention of fish larvae.\nA bibliography of surveys and larva and larva identification has been assembled by Dr. Elda Fagetti of FAO and Dr. Elbert Ahlstrom, Senior Scientists at the La Jolla Laboratory and included as part of the manual. The bibliography has been indexed to taxonomic groups and geographic regions.\nProgress of Survey Systems Analysis Investigation Reviewed\nProgress made by the staff on the Survey Systems Analysis Investigation at the La Jolla Laboratory in preparing the review of the California Cooperative Oceanic Fisheries Investigation was reviewed by Center Director Rothschild and interested investigation leaders at the La Jolla Laboratory on August 14. Drs. P. Smith, R. Owen, and A. Alvarino, and Mr. D. Kramer, provided a synopsis of activities in the review process and Lt. R. Hewitt, NOAA officer detailed to the La Jolla Laboratory, reviewed the status of the data compilation schedule. Action was suggested in several areas: increased emphasis on the 25-year CalCOFI time series; revision and publication of the resume of CalCOFI; and preparation of draft publication forms at the completion of individual projects.\nTUNA ASSESSMENT AND DEVELOPMENT INVESTIGATIONS\nAnchovy From Fourth Shipment Reach Hawaii in Excellent Condition; Tanker Modification and Bait Density Studies Underway\nThe Honolulu Laboratory continues in its efforts to determine a means of providing a suitable skipjack tuna baitfish for the fisheries of the central and western Pacific Ocean.\nAfter three shipments of northern anchovy were made via experimental trans- port tank from Long Beach, California to Honolulu -- each characterized by high bait mortality -- a bait aging facility was set up in the Long Beach Harbor area in July. For the fourth shipment begun August 7, the facility\n19\nmade available about 2,000 pounds of strong, healthy fish. Of the 224 scoops of fish placed in the transport tank, 17 were weighed and the calculated total weight estimated at 1,317 pounds of anchovy. Prior to sailing it was noticed that live fish were being picked up in the after water outlet, the result of a greatly increased pressure head created by the angle of the tanker aboard the Matsonia.\nAt the completion of the unmonitored voyage to Honolulu, a conservatively estimated 410 pounds of anchovy in excellent condition were removed from the tanker and placed in holding tanks at Kewalo Basin. Less than 30 pounds of dead fish, well decomposed, were in the bottom of the tank, indicating slight mortality during the trip. It is estimated from these known amounts that at least 800 pounds of anchovy were lost overboard during the shipment, probably having been expelled through the water outlet. It seems likely that most of the lost fish were alive.\nFour skipjack tuna fishing vessels in Honolulu expressed interest in buying the anchovy at $2.00 per pound. Those selected, by drawing, expressed reservation at the suitability of the large anchovy for fishing the small- and medium-sized skipjack tuna presently in the Hawaiian area.\nThe tanker was returned to Long Beach, where modifications are underway to obviate the loss of live fishes. Bait density tests are also being conducted at Long Beach by Roger Green, Leader, Baitfish Project, and Fishery Methods and Equipment Specialist Don Aasted.\nManuscript Revision and Report Writing Occupy Scientists of Fishery Analysis Program\nA major emphasis of the Fishery Analysis Program of the Honolulu Laboratory under the leadership of Dr. Robert Skillman, Fishery Biologist, is on stock assessment in the Pacific and Indian Oceans. During the month of August progress in the assessment of skipjack tuna resources and assessment of other tuna and tunalike resources took the form of manuscript revision and report writing. Mr. Richard Uchida, Fishery Biologist, continued to make minor revisions of his manuscript \"Reevaluation of fishing effort and apparent abundance in the Hawaiian skipjack tuna, Katsuwonus pelamis, fishery, 1948-70.\" and also of the draft of a working paper \"Recent de- velopments in fisheries for skipjack tuna, Katsuwonus pelamis, in the central and western Pacific and Indian Oceans.\" This working paper was prepared for the IOFC/IPFC Tuna Working Party at the request of J.A. Gulland, FAO Fishery Resources Divison. Mr. Uchida spent the remainder of the month compiling and summarizing tuna catch data from the Pacific Ocean for 1960-72 and preparing a short report describing recent developments in fisheries for skipjack tuna.\n20\nDr. Skillman revised the manuscript \"An assessment of the South Pacific albacore, Thunnus alalunga, fishery, 1953-72\" following outside review. It has been forwarded to the Director, SWFC, for permission to publish in the Marine Fisheries Review.\nHawaii's 1974 Skipjack Tuna Catch Continues Well Below Average\nFrom January through August 1974 the skipjack tuna fishery in Hawaii produced an undistinguished estimated catch of 2,489 metric tons. This figure is 1,349 metric tons below last year's catch for the same period and 980 metric tons below the average for 1948-73. In the month of August alone the catch reached an estimated 380 metric tons, which was 344 metric tons below the catch in August 1973 and 349 metric tons less than the long- term August average.\nPulou Niuatoa, Government of American Samoa employee, recorded the lengths of 1,967 albacore from 42 vessels during the period July 26 to August 23. He collected 33 sets of catch and effort data. Utilizing the data from 10 vessels only, an average size of 89.0 cm was determined and an albacore catch per 100 hooks of 3.13.\nPROJECT PROPOSAL DEVELOPED FOR BUREAU OF LAND MANAGEMENT ENVIRONMENTAL STUDY\nIn response to the needs of the Department of the Interior's Bureau of Land Management for environmental information on the impact of possible offshore oil and gas development in the area of the southern California Bight, a team headed by Mr. David Mackett, SWFC Planning Officer, is writing a comprehensive plan for environmental monitoring and baseline studies in this area. According to Mr. Mackett, this study will provide the mechanisms to assist BLM in answering the \"what if\" questions, i.e., What would happen if an oil spill occurred in any particular area? and What are the likely effects on the fish life, recreational fishing and commercial fishing, etc., in the ocean environment?\nIn preparation for writing the proposal a SWFC contingent which included Drs. Rothschild, R. Lasker, E. Ahlstrom, R. Owen, and Messrs. N. Abramson and Mackett met in Boulder, Colorado, August 5-9 with BLM and Environmental Research Laboratory staff to discuss ways of designing baseline and monitor- ing studies for the Los Angeles Bight. During the week-long stay in Boulder, a draft plan was put together which consists of two phases. The first phase of approximately 15 months duration would result in a general decision framework for evaluating the environmental issues about oil development in the southern California area; preparation and establishment of environmental baselines from existing data; and the collection of selected environmental data on important variables for which data are now lacking.\n21\nThe second phase would consist of further data collection, the conduct of experiments, and analysis that will be required to increase the accuracy or precision of the information required for making better decisions re- garding the impacts of oil and gas development on the environment.\nOn August 21-23, Mr. Mackett and Dr. Ahlstrom flew to Washington, D.C. to review the finished plan with Mr. David Wallace, Associate Administrator for Marine Resources, and other NOAA and NMFS officials. It was recommended by the reviewing officials that the proposal be rewritten to conform in format to other NOAA proposals to BLM. Other elements in NOAA -- Environ- mental Research Laboratory, National Ocean Survey, as well as other lab- oratories in NMFS, are working cooperatively on proposals to BLM for other offshore continental areas, and September 25 has been set for presentation of the formal NOAA plan to BLM.\nPUBLIC AFFAIRS\nFishery Biologists Paul Smith and David Kramer will represent the National Marine Fisheries Service's La Jolla Laboratory in the 1974-75 \"Meet the Scientist\" lecture program, sponsored by the Greater San Diego Industry Education Council of the County Department of Education. Dr. Smith who has agreed to speak to students at the senior high and community college level has selected, \"Fisheries and Fishery Research in the California Current\" as his topic. Mr. Kramer will discuss \"Current trends in fishery research\" at community colleges during the coming school year. This is the 3rd year of NMFS participation in the program to acquaint students with scientific research being carried out in the San Diego area.\nSEMINARS\nAugust 1 Dr. Maynard A. Steinberg, Director of the NMFS Pacific Utilization Research Center in Seattle, gave an informal talk to the staff at the Honolulu Laboratory on the activities of his organization.\nMEETINGS AND TRAVEL\nJuly 28- August 1\nDr. E. Hobson, of the Tiburon Laboratory, attended a Shark Behavior Workshop convened by ONR and NSF at Monterey, California.\nAugust 1 Mr. R. Shomura, Director of Honolulu Laboratory, attended a meeting called by the Hawaii Department of Land and Natural Resources to discuss the proposed Wilderness Area for the Northwest Hawaiian Islands, also known as the Leeward Hawaiian Islands. The boundary of the Wilderness Area is the key point of dispute between the State of Hawaii and the Department of the Interior.\n22\nAugust 3 Mr. Maxwell Eldridge, Fishery Biologist, attended a meeting at Mill Valley, California of the North Central Coastal Commission which was concerned with developing policies towards coordinating coastal research and managing and protecting areas of ecological importance.\n6\n- Mr. Charles Dana Gibson of New York visited the Honolulu Laboratory to discuss with Dr. Barkley the possibility of bringing his vessel to Hawaii to enter the snapper or shrimp fishery.\n9 Mr. Maxwell Eldridge visited the Pacific Gas and Electric - Company Engineering Research Facility in Danville, Cali- fornia. The purpose of the visit was to observe methods and equipment in use at that facility for the measurement of ATP in plankton.\n13 Mr. David Mackett, SWFC Planning Officer, was in Menlo Park, California to confer with U.S. Geological Survey staff.\nDiscussions concerning the Pacific Tuna Development Foundation (PTDF) program in the central and western Pacific attended by Dr. Rothschild, Mr. Barrett, W. Van Campen, Gerald Howard and Messrs. G. Broadhead and F. Alverson of LMR.\n13 and 30 13 Lt. Roger Hewitt, Charles Hill, Chief, Support Services at the La Jolla Laboratory, and Captain Charles Forster of the Jordan were in Los Angeles to negotiate and sign contracts for two wetfish purse seiners to work with the Jordan collecting anchovies to confirm sonar measurements.\n13-16 -\nSWFC Executive Officer Ben Remington traveled to Boulder, Colorado, to participate in Management by Objective dis- cussions with NOAA and NMFS officials.\n20-21 - Mr. J.F.T. Saur, Oceanographer at the La Jolla Laboratory, attended the conference of NORPAX (North Pacific Experi- ment) Co-principal Investigators which was hosted by the Fleet Numerical Weather Central at Monterey, California. The conference comprised the annual site review of some 35 projects within NORPAX by the two sponsoring agencies, Office of Naval Research and National Science Foundation/ International Decade of Ocean Exploration. Dr. Douglas R. Mclain, NMFS Pacific Environmental Group, Monterey, and Mr. Saur made a presentation on progress and plans for the NMFS project, \"Ships of opportunity: time series XBT sections in the equatorial and North Pacific Ocean.\"\n23\nAugust 29 Dr. John Bardach, Director, Hawaii Institute of Marine Biology, met with Mr. Shomura to discuss fisheries problems of the State.\n30 Dr. John J. Magnuson, University of Wisconsin, discussed with Mr. Shomura some physiology and behavior research projects.\nVISITORS\nHonolulu Laboratory\nAugust 1 - Dr. Harold Rosenthal, Biologist, West Germany.\n15-23 - Mr. Naomi Yoshikawa, Managing Director (Planning and Production), Japan Marine Products Photo Materials Association, Tokyo.\n26 Mr. Matthew Chun, Office of Hawaii State Gubernatorial - Candidate Thomas P. Gill, Honolulu.\n28 Mr. Theodore A. Morgado, Docksite Manager, Star-Kist Foods, Inc., Pago Pago.\n29 Dr. Gary T. Sakagawa, Fishery Biologist, SWFC, - La Jolla.\n30 Mr. T. Yamamoto, FAO Fishery Statistician, UNDP/FAO Fisheries Development and Management Project, Jakarta.\nLa Jolla Laboratory\nAugust 6 Mr. Robert J. Ayers, NMFS, Washington, D.C.\n7-9 Mr. M'nachem Ben Yami, Department of Fisheries, Haifa, - Israel.\n8 Mr. J.M. Gates, University of Rhode Island, Kingston, - Rhode Island.\n- Mr. Norm Abramson, SWFC's Tiburon Laboratory.\n13 Mr. Gerald Howard, NMFS Regional Office, Terminal - Island, California.\n24\nAugust 15 - Mr. Amin Zarur, Chief, Fisheries Office, Mexican Fish Commission\n21\n- Messrs. Herb Hyatt and Robert Gillard, Bureau of Land Management, Los Angeles\n26 Mr. James Johnson, Pacific Environmental Group, Monterey -\n28\n- Drs. Victor N. Maximov, Moscow University, Ivan B. Tokin, University of Marine Biology, Murmansk, and Gennadii Polikarpov, Institute of Biology of South Seas, Sebastopol, U.S.S.R.\n- Mr. William L. Templeton, Battelle Northwest, Richland, Washington\n- Mr. Michael J. Wade, U.S. Environmental Protection Agency, Narragansett, Rhode Island.\nTiburon Laboratory\nAugust 2\n- Edwin Osada, Moss Landing Marine Laboratory, Moss Landing.\n16 - Paul Siri, TYEE Club, Atherton, California.\n- Robert L. Fichtner, Ultrachem, Walnut Creek, California.\n- William G. Wilson, Ultrachem, Walnut Creek, California.\n- Akira Harada, Ultrachem, Walnut Creek, California.\nDr. Frank Hester, Frank Hester Associates, Santa Barbara, California.\n19\n- John Padan, PMEL/NOAA, Seattle, Washington.\n27\n- P. Maddox, Marine Science Institute, Dana Point, California.\n30\n- Roger Green, NMFS, Honolulu, Hawaii.\nPERSONNEL ACTIONS\nLaboratory\nAugust 1\nCuthbert Love, Oceanographer - Termination of Temporary Appointment\nLa Jolla\n- Eugene Burke, Janitor - Promotion Tiburon\n25\nLaboratory\nAugust 8\n- Frances Chew, Clerk-Typist - Transfer to Veteran's Administration\nLa Jolla\n9\n- Melchor Fernandez, Biological Aid - Temporary Appointment\nHonolulu\n13 Mary Beyer, Clerk-Steno - Temporary - Appointment\nLa Jolla\n19 Rose Smith, Summer Aid - Termination of Temporary Appointment\nLa Jolla\n30 - Bruce Wahlen, Mathematical Technician, Pay Adjustment to Part-Time\nLa Jolla\nTRAINING\nAugust 26-28 - Fishery Biologist Dr. Robert A. Skillman and Scientific Information Specialist Ms. Mary Lynne Godfrey of the Honolulu Laboratory attended a course given by the U.S. Civil Service Commission entitled \"Interpersonal Com- munications for Managers.\"\n26",
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                    "content": ". Scientists Evaluate Feasibility of Collecting and Holding Live Albacore.",
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                    "content": ". Antibiotics Reducing Mortality of Captive Salmon; Fish Showing",
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                    "content": "Good Growth",
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                {
                    "content": ". Pelagic Red Crabs Constitute Large Untapped Resource in Eastern Pacific.",
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                    "content": ". Physiological Data Suggest Definition of Limits of Skipjack Tuna Habitat",
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                    "content": "Summary Report of Porpoise Research in Preparation for Commerce",
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                    "content": "information",
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                {
                    "content": "La Jolla, California",
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                {
                    "content": "HONOLULU LABORATORY",
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                    "content": "TIBURON LABORATORY",
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                    "content": "MONTHLY REPORT-AUGUST 1974",
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                    "content": "STATUS OF PUBLICATIONS",
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                    "content": "fin tuna tagged off the southern coast of Mexico in 1960 and 1969.",
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                    "content": "Bull. Inter-Am. Trop. Tuna Comm. 16(1): 1-64.",
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                    "content": "The map method, the Jones method, the variance-covariance method,",
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                    "content": "and the Skellam method were used to study the migrations of tagged",
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                    "content": "yellowfin tuna released off the southern coast of Mexico in 1960",
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                    "content": "and 1969. The first three methods are all useful, and each presents",
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                {
                    "content": "information which is complementary to that presented by the others.",
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                {
                    "content": "The Skellam method, as used in this report, is less useful.",
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                    "content": "The movements of the tagged fish released in 1960 appeared to have",
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                    "content": "been strongly directed, but this was probably caused principally",
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                    "content": "by the distribution of the fishing effort. The effort was much",
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                    "content": "more widely distributed in 1970, and the movements of the fish re-",
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                    "content": "leased in 1969 appeared to have been much less directed. The cor-",
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                    "content": "relation coefficients derived from the variance-covariance method",
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                    "content": "showed that it was not random, however.",
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                    "content": "The small fish released in the Acapulco and 10ºN-100°W areas in",
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                    "content": "1969 migrated to the Manzanillo area near the beginning of February",
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                {
                    "content": "same year tended to migrate to the southeast throughout the first",
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                {
                    "content": "half of 1970, however.",
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                },
                {
                    "content": "Hester, Frank J., and Everet C. Jones. 1974. A survey of giant clams,",
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                {
                    "content": "Tridacnidae, on Helen Reef, a western Pacific atoll. U.S. Natl.",
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                {
                    "content": "Mar. Fish. Serv., Mar. Fish Rev. 36(7): 17-22. (MFR paper 1071.)",
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                    "content": "This report does not constitute publication and is for information only.",
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                    "content": "(U.S.).",
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                {
                    "content": "Transects and areal surveys by swimmers were used to estimate the",
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                {
                    "content": "standing stock of giant clams, Tridacnidae, at Helen Reef, Western",
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                {
                    "content": "Caroline Islands in March 1972. Estimates were Tridacna crocea",
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                            "offset": 3005,
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                        }
                    ]
                },
                {
                    "content": "3.7 x 106, T. maxima 1.7 x 106, Hippopus hippopus 44.6 x 103,",
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                    ]
                },
                {
                    "content": "T. derasa 32.8 x 103, and T. gigas 49.8 x 103. T. squamosa was",
                    "polygon": [
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                },
                {
                    "content": "not as abundant or was identified as T. maxima. Most T. gigas",
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                    ]
                },
                {
                    "content": "and T. derasa were large, suggesting low or erratic recruitment.",
                    "polygon": [
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                    ]
                },
                {
                    "content": "Korn, S. and R. Earnest.",
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                },
                {
                    "content": "1974. Acute toxicity of twenty insecticides",
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                },
                {
                    "content": "to striped bass, Morone saxatilis. California Fish and Game,",
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                    "spans": [
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                            "offset": 3389,
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                },
                {
                    "content": "60(3): 138-131.",
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                    ]
                },
                {
                    "content": "This paper describes acute toxicity of 20 different insecticides",
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                        {
                            "offset": 3466,
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                },
                {
                    "content": "to juvenile striped bass. The insecticides Endrin, Endosulfan,",
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                    ]
                },
                {
                    "content": "DDT, and Dursban are shown to be most toxic, while Carbaryl and",
                    "polygon": [
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                            "offset": 3594,
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                    ]
                },
                {
                    "content": "Abate proved least toxic. Fourteen other insecticides were also",
                    "polygon": [
                        1.589,
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                            "offset": 3658,
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                        }
                    ]
                },
                {
                    "content": "tested and are listed in order of decreasing toxicity. Some ad-",
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                    "spans": [
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                            "offset": 3722,
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                    ]
                },
                {
                    "content": "vantages of intermittent versus static bioassay testing are discussed.",
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                            "offset": 3786,
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                },
                {
                    "content": "Matsumoto, Walter M. 1974. The skipjack tuna, Katsuwonus pelamis, an",
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                    "spans": [
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                    ]
                },
                {
                    "content": "underutilized resource. U.S. Natl. Mar. Fish. Serv., Mar. Fish.",
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                    ]
                },
                {
                    "content": "Rev. 36(8): 26-33. (MFR paper 1077.)",
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                    "content": "giving recent catch statistics and including assumed movement patterns",
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                    "content": "of Pacific stocks. Opportunities exist for the increased develop-",
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                    "content": "ment of the skipjack tuna resource, a benefit to the economy of the",
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                    "content": "Rothschild, Brian J. 1974. The California gray whale. Introductory",
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                    "content": "remarks California Gray Whale Workshop, Univ. Calif., San Diego,",
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                    "content": "August 21-22, 1972. Mar. Fish. Rev., Spec. No. 36(4): 2.",
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                    "content": "Approved by Center Director",
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                    "content": "Reuben Lasker. For publication in the Fishery Bulletin (U.S.).",
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                    "content": "\"The American Samoa longline fishery, 1966-71\" by Howard 0. Yoshida.",
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                    "content": "Scientists on Jordan Conduct Studies on the Nearshore Availability of",
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                    "content": "Albacore off Southern California and Related Environmental Conditions",
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                    "content": "fishery forecast issued by the La Jolla Laboratory has indicated that",
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                    "content": "the major portion of the albacore catch for the season would be taken in",
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                    "content": "waters north of San Francisco. The forecasts have been accurate in that",
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                    "content": "the major portions of the seasonal catches for the last several years",
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                    "content": "have been from \"northern\" waters. Partly in response to the NMFS fore-",
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                    "content": "casts, most of the albacore vessels have moved to \"northern\" waters early",
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                {
                    "content": "in the season, leaving a void in fish scouting and fishing effort in",
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                },
                {
                    "content": "southern California where albacore catches were high many years ago.",
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                },
                {
                    "content": "As part of an evaluation of the albacore seasonal forecasts, efforts",
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                },
                {
                    "content": "were made this season to determine the availability of albacore in northern",
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                    ]
                },
                {
                    "content": "Baja-southern California waters. Fish scouting/oceanographic observations",
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                    ]
                },
                {
                    "content": "were conducted by three commercial albacore jig fishing vessels on charter",
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                    ]
                },
                {
                    "content": "to the American Fishermen's Research Foundation working cooperatively with",
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                    ]
                },
                {
                    "content": "the La Jolla Laboratory, and fish scouting/oceanographic observations and",
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                    ]
                },
                {
                    "content": "other studies were conducted from the NOAA research vessel, Jordan, during",
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                },
                {
                    "content": "July and August 1974. The fishing vessels on charter to AFRF worked the",
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                    ]
                },
                {
                    "content": "area from off San Diego south to Guadalupe Island and northward outside",
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                    ]
                },
                {
                    "content": "the Channel Islands. No commercial concentrations of albacore were found",
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                    ]
                },
                {
                    "content": "by the fishing vessels.",
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                },
                {
                    "content": "The Jordan worked the area off San Diego out to San Juan Seamount and in",
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                    "content": "the vicinity of the Channel Islands. Scouting efforts on the Jordan con-",
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                    "content": "sisted of trolling eight lines from dawn to dark, and visual watches from",
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                {
                    "content": "the wheelhouse for signs of fish. No commercial concentrations of albacore",
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                {
                    "content": "were sighted or caught during the Jordan cruise. However, small catches,",
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                    "content": "mostly 4-6 pound fish, were made in the vicinity of San Juan Seamount.",
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                    "content": "A total of 31 albacore was caught during the cruise. Length and weight",
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                    "content": "measurements were taken on all the fish. Complete digestive tract and",
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                },
                {
                    "content": "heart plucks were collected from 15 fish for Dr. Ted Folsom of Scripps",
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                    "content": "Institution of Oceanography for radionucleide study. Heads were collected",
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                    "content": "from 10 fish for removal of otoliths ashore for aging studies being con-",
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                    "content": "ducted at the Honolulu Laboratory.",
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                {
                    "content": "COASTAL FISH COMMUNITIES INVESTIGATIONS",
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                    "content": "Changes in Food Habits with Size Studied in the Shiner Surfperch,",
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                    "content": "Cymatogaster aggregata",
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                    "content": "Dr. Edmund Hobson, Project Leader at the Tiburon Laboratory, working with",
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                    "content": "feeding behavior of juvenile fishes in the continued investigation of near-",
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                    "content": "shore fish communities. Work this month centered on the shiner surfperch,",
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                    "content": "Cymatogaster aggregata, which is among the most widespread of the surfperches,",
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                {
                    "content": "an important group of sport fishes.",
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                    "content": "showing",
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                    "content": "condition.",
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            ],
            "lines": [
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                    "content": "The shiner surfperch has been found to feed only by day when it is a small",
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                {
                    "content": "juvenile, and to feed by night as well when it grows larger. This situation",
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                    "content": "is similar to that described last month for the olive rockfish, Sebastes",
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                    "content": "serranoides. The shiner surfperch, however, experiences this behavioral",
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                    "content": "change at a slightly larger size -- about 70 mm, as compared to about 60 mm",
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                {
                    "content": "for the olive rockfish. Furthermore, the larger shiner surfperch continues",
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                    "content": "to feed regularly by day in addition to feeding at night, whereas the",
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                {
                    "content": "larger olive rockfish becomes predominantly nocturnal. These differences",
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                    "content": "in behavior between the two species are being related to morphological",
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                {
                    "content": "characteristics, and to the way these fish capture prey and the nature of",
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                    "content": "their prey. The observations are also being related to the distribution",
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                    "content": "of prey in the water column during both day and night, as determined by",
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                },
                {
                    "content": "the plankton sampling described earlier.",
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                },
                {
                    "content": "COASTAL FISHERIES INVESTIGATIONS",
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                {
                    "content": "Antibiotics Reducing Mortality of Captive Salmon; Fish Showing Good Growth",
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                {
                    "content": "Mr. Lloyd Richards, Biological Technician, reports that the coho salmon",
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                },
                {
                    "content": "rearing program, a cooperative project of the Tiburon Laboratory and Sea",
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                },
                {
                    "content": "Grant, California Department of Fish and Game, and San Francisco TYEE Club",
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                    "content": "(a conservation-oriented sport fishermen's group) has continued to generate",
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                {
                    "content": "interest in the Bay Area. A second TV station featured the rearing program",
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                    "content": "in the evening news.",
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                },
                {
                    "content": "Of the original 10,000 fish stocked in our pen in early July, about 7,500",
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                    "content": "remain. Mortality has been about 25 fish per day, during an outbreak of",
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                },
                {
                    "content": "bacterial disease when 230 fish died in 3 days. Pathologists of the Cali-",
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                    "content": "fornia Department of Fish and Game diagnosed the bacteria as Bacillus",
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                    "content": "columnaris. After a week's treatment with terramycin, included in the",
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                    "content": "feed, the mortality rate dropped to \"normal.\"",
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                    "content": "Stan Smith, a volunteer worker and student from San Francisco State University,",
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                {
                    "content": "has been heavily involved in the program. As part of his thesis work, he",
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                    "content": "has been monitoring levels of oxygen, salinity, temperature, and pH within",
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                    "content": "and outside the rearing pen. Of greatest concern is the drop in oxygen",
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                    "content": "level down to 5.3 ppm in the pen during early morning hours. The range",
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                {
                    "content": "has been within 5.3 and 7.9 ppm. Temperature has ranged between 62-69º",
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                    "content": "ing to Mr. Kato. Additionally, a researcher at San Diego State University",
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                    "content": "vitality and growth.",
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                    "content": "sultant for Japan Air Lines. They conferred with heads of two firms which",
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                    "content": "are interested in processing sea urchins. Prospects of marketing unused",
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                    "content": "18°,",
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                    "content": "29℃",
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                    "content": "7",
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                    "content": "FISH ENVIRONMENT INVESTIGATIONS",
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                    "content": "Activity of Tunas in Rapidly Cooling Water Investigated in Doughnut Tank",
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                    "content": "The Life Studies Program of the Honolulu Laboratory has as its long-range",
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                {
                    "content": "goal the generation of a predictive model of tuna distribution, abundance,",
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                {
                    "content": "and availability to fisheries. The model is to be based on the joint",
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                    "content": "physiological and behavioral responses of tunas to environmental variables,",
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                {
                    "content": "determined in part through experimental work with captive fishes. To ex-",
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                {
                    "content": "plore the potential value of such an approach and to provide an objective",
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                {
                    "content": "framework for further experimental work, Drs. William H. Neill and Andrew",
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                    "content": "E. Dizon, Fishery Biologists with the Honolulu Laboratory, have developed",
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                    "content": "a simulation model for the responses of fishes to temperature, a variable",
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                    "content": "of recognized importance in the ecology not only of tunas but also of",
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                    "content": "fishes in general.",
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                    "content": "Important inputs to the model are the functional relationships between",
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                    "content": "swimming activity of fish and thermal structure of the environment. Drs.",
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                    "content": "Dizon and Neill are conducting a series of cooling experiments in the",
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                    "content": "doughnut tank to establish such relationships for tunas. Water temper-",
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                    "content": "ature is decreased from 27°℃ at about 0.05℃ min-1 while swimming speed",
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                    "content": "and turning tendency of the tunas are monitored.",
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                    "content": "Experiments with eight skipjack and two yellowfin tunas have been conducted.",
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                    "content": "when tank temperature decreased to 21.5º-20.5°C. However, swimming speed",
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                    "content": "of skipjack tuna tended to be almost between 27° and 19℃, whereas yellow-",
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                    "content": "fin tuna swam slower",
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                    "content": "(Q10=2.2) as' the water cooled.",
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                    "content": "Effects of Temperature on Routine Metabolism of Skipjack Tuna",
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                    "content": "Productivity of the seas in terms of tuna flesh must depend on whether",
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                    "content": "food supplies are adequate to provide the energy required by tunas for",
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                    "content": "activity and growth. Research Assistants Randolph Chang and Bernard Ito,",
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                {
                    "content": "under the supervision of Dr. William Neill, all of the Honolulu Laboratory,",
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                    "content": "are extending previously completed experiments on routine metabolism of",
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                    "content": "skipjack tuna at a single temperature (24℃) to temperatures throughout",
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                    "content": "the skipjack tuna's zone of thermal tolerance. This will permit estima-",
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                    "content": "tion of the energy required for minimum activity in skipjack tuna at all",
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                    "content": "Experiments at 18°, 24°, and 29℃ have now been completed.",
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                    "content": "Results can",
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                    "content": "Temperature",
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                    "content": "℃",
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                        4.1261,
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                    "confidence": 0.997,
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                        "length": 1
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                }
            ],
            "lines": [
                {
                    "content": "Temperature",
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                    "spans": [
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                    ]
                },
                {
                    "content": "℃",
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                    "spans": [
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                            "offset": 18215,
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                    ]
                },
                {
                    "content": "Number of",
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                    "spans": [
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                    ]
                },
                {
                    "content": "tests",
                    "polygon": [
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                    "spans": [
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                    ]
                },
                {
                    "content": "Respiration rate",
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                    "spans": [
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                            "offset": 18233,
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                    ]
                },
                {
                    "content": "(mg 02 g-1 hr-1)",
                    "polygon": [
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                    "spans": [
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                    ]
                },
                {
                    "content": "Median",
                    "polygon": [
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                    "spans": [
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                    ]
                },
                {
                    "content": "Range",
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                    "spans": [
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                    ]
                },
                {
                    "content": "18",
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                    ]
                },
                {
                    "content": "14",
                    "polygon": [
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                    ]
                },
                {
                    "content": "0.66",
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                    ]
                },
                {
                    "content": "0.42-1.03",
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                    ]
                },
                {
                    "content": "24",
                    "polygon": [
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                    "spans": [
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                    ]
                },
                {
                    "content": "6",
                    "polygon": [
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                    ]
                },
                {
                    "content": "0.71",
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                    "spans": [
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                            "offset": 18306,
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                    ]
                },
                {
                    "content": "0.58-0.79",
                    "polygon": [
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                    "spans": [
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                            "offset": 18311,
                            "length": 9
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                    ]
                },
                {
                    "content": "29",
                    "polygon": [
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                    "spans": [
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                            "offset": 18321,
                            "length": 2
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                    ]
                },
                {
                    "content": "10",
                    "polygon": [
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                    "spans": [
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                            "offset": 18324,
                            "length": 2
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                    ]
                },
                {
                    "content": "0.78",
                    "polygon": [
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                    "spans": [
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                            "offset": 18327,
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                    ]
                },
                {
                    "content": "0.64-1.25",
                    "polygon": [
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                    "spans": [
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                            "offset": 18332,
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                    ]
                },
                {
                    "content": "Thus, routine metabolism of skipjack tuna appears only weakly temperature-",
                    "polygon": [
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                    "spans": [
                        {
                            "offset": 18342,
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                    ]
                },
                {
                    "content": "dependent, the Q value being between 1.1 and 1.2. This conclusion is",
                    "polygon": [
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                    "spans": [
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                            "offset": 18417,
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                    ]
                },
                {
                    "content": "consistent with that reached by M. Gordon [Science 159: 87-90, 1968]",
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                    "spans": [
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                            "offset": 18486,
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                    ]
                },
                {
                    "content": "through respirometric study of minced red and white muscle from skipjack",
                    "polygon": [
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                    "spans": [
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                    ]
                },
                {
                    "content": "tuna.",
                    "polygon": [
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                    "spans": [
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                    ]
                },
                {
                    "content": "From the energetics standpoint, these data suggest that skipjack tuna re-",
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                    "spans": [
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                            "offset": 18634,
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                    ]
                },
                {
                    "content": "quire (for minimal activity) only about 20% more energy in the warmest",
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                    ]
                },
                {
                    "content": "parts of their habitat than in the coolest parts. The near-independence",
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                    ]
                },
                {
                    "content": "of skipjack tuna metabolism and temperature stands in marked contrast to",
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                    ]
                },
                {
                    "content": "the situation for virtually all other fishes, whose demand for energy",
                    "polygon": [
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                    ]
                },
                {
                    "content": "typically doubles or trebles for each 10°℃ increase in temperature.",
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                    ]
                },
                {
                    "content": "Physiological Data Suggest Definition of Limits of Skipjack",
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                },
                {
                    "content": "Tuna Habitat",
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                },
                {
                    "content": "Physiological data obtained recently in experiments and simulation studies",
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                },
                {
                    "content": "conducted by the Life Studies Program of the Honolulu Laboratory are being",
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                    ]
                },
                {
                    "content": "used to shape answers to the long-standing question of why there are no",
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                    ]
                },
                {
                    "content": "big skipjack tuna in the eastern Pacific Ocean. These data are being used",
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                    ]
                },
                {
                    "content": "to define the geographic areas the skipjack tuna can be expected to inhabit",
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                    ]
                },
                {
                    "content": "on the basis of extremes in temperature and other parameters. Results so",
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                    ]
                },
                {
                    "content": "far indicate that the smaller skipjack tuna, less than 3 kg or 50 cm in size,",
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                },
                {
                    "content": "can inhabit virtually all of the eastern tropical Pacific above the oxycline.",
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                    ]
                },
                {
                    "content": "Areas from which larger fish are excluded increase in size with the size of",
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                },
                {
                    "content": "the fish. Fish weighing 8 kg, 70 cm long, are excluded from an area which",
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                    ]
                },
                {
                    "content": "extends from Cabo Corrientes or San Blas to 145°W, 10ºN, and from there to",
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                    ]
                },
                {
                    "content": "Panama. Fish of intermediate size are excluded from most of this area,",
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                },
                {
                    "content": "but can move north-south along a 100-mile corridor slightly offshore of",
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                    ]
                },
                {
                    "content": "Mexico, between the Gulf of Tehuantepec and the Gulf of California. This",
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                },
                {
                    "content": "corridor probably closes seasonally, and may close entirely in some years.",
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                },
                {
                    "content": "Fishery Biologist Heeny Yuen, who coordinated the work of the SWFC Honolulu",
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                },
                {
                    "content": "Laboratory at the 16th annual Hawaiian International Billfish Tournament",
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                },
                {
                    "content": "held in July, has completed his report of the tournament. This includes",
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                    "content": "a cursory analysis of the scientific information collected by the NMFS",
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                },
                {
                    "content": "team under Mr. Yuen's direction.",
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                    ]
                },
                {
                    "content": "8",
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            ],
            "spans": [
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            ]
        },
        {
            "pageNumber": 10,
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            "words": [
                {
                    "content": "Biological",
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                {
                    "content": "Aid",
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                {
                    "content": "Elliott",
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                {
                    "content": "Kawahara",
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                    "content": "Biological Aid Elliott Kawahara has completed plotting the results of",
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                    "content": "longline catches of black marlin in the Pacific and Indian Oceans accord-",
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                    "content": "Summary Report of Porpoise Research in Preparation for Commerce Report",
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                    "content": "to Congress",
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                    "content": "The entire scientific staff of the Marine Mammal Investigations at the",
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                    "content": "La Jolla Laboratory is devoting maximum effort to the completion of a",
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                    "content": "report due in early September summing up the progress of research under-",
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                    "content": "Southwest Fisheries Center almost 2 years ago. This report will be sub-",
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                    "content": "to Congress in conformance with the provisions of the Marine Mammal Pro-",
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                    "content": "tection Act of 1972. Items to be covered in the comprehensive report",
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                    "content": "will include results of porpoise life history studies, estimates of",
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                    "content": "porpoise mortality, population estimates derived from the aerial survey,",
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                    "content": "marine mammal watch, development and application of porpoise-saving fishing",
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                    "content": "gear, assessments on the performance of the tuna fleet in alleviating por-",
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                    "content": "poise mortality, and recommendations for future porpoise research.",
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                    "content": "Dr. Eric Barham, Porpoise Program Manager, plans to hand-carry the com-",
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                    "content": "pleted report to Washington, D.C. on September 9 for final review.",
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                    "content": "reports that Mr. Jerry Jurkovich of the NMFS Northwest Fisheries Center,",
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                    "content": "who has been aboard the seiner, South Pacific, observing the performance",
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                    "content": "of the NMFS-designed, large-volume tuna purse seine net, returned to",
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                    "content": "San Diego on September 1. Mr. Jurkovich is well-satisfied with the per-",
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                    "content": "formance of the experimental purse seine which appears to be effective",
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                    "content": "in reducing porpoise mortality. Preliminary inspection of Mr. Jurkovich's",
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                    "content": "data indicates a low kill rate on 37 porpoise sets.",
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                    "content": "PHYSIOLOGY",
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                    "content": "embryos.",
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                    "content": "PHYSIOLOGY INVESTIGATIONS",
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                {
                    "content": "Experiments Indicate Rapid Uptake of Benzene in Anchovy Larvae and Adults",
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                    "content": "As part of the study of effects of crude oil components on various life",
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                },
                {
                    "content": "stages of fishes, investigator Sid Korn, Fishery Biologist, assisted by",
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                {
                    "content": "Nina Hirsch, Biological Technician at the Tiburon Laboratory, are studying",
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                },
                {
                    "content": "uptake and accumulation of benzene by the northern anchovy. Results of",
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                    "content": "this month's experiments indicate that benzene accumulates very rapidly",
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                {
                    "content": "in certain tissues of larval and adult anchovies.",
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                },
                {
                    "content": "Newly hatched anchovy larvae were exposed to a concentration of",
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                {
                    "content": "14",
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                {
                    "content": "*C-labeled",
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                {
                    "content": "benzene for 24 hours. After 6 hours the accumulation appeared to be 60X",
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                {
                    "content": "that of initial exposure levels, and after 24 hours levels rose by a factor",
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                {
                    "content": "of 100X. Although there is a possibility of sample contamination due to",
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                },
                {
                    "content": "inadequate rinsing of the surface film on the larvae, in view of the results",
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                    "content": "of subsequent experiments with adult fish, these values do reflect a very",
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                    "content": "high rate of accumulation. New techniques are being evolved to counteract",
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                {
                    "content": "the possibility of sample contamination.",
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                    "content": "Adult anchovies were acclimated for 2 weeks, then exposed to 7 ppm benzene",
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                },
                {
                    "content": "for 1.5 hours. Measurements were made of levels in the liver, muscle, brain,",
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                },
                {
                    "content": "and gill tissues using the Gas Chromatograph and the scintillation counter.",
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                    "content": "At present, the Gas Chromatograph measures only benzene, while the scintil-",
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                    "content": "lation counter measures all 14C-labeled components and does not distinguish",
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                    "content": "between 14℃ benzene and 14C metabolites of benzene (such as phenols). After",
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                    "content": "only 1-1/2 hours of exposure, levels in the liver, brain, and gill tissue",
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                {
                    "content": "measured by the G.C. method were found to be 6X to 8X the level of initial",
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                    "content": "exposure, and as high as 15X (Tiver tissue) using the scintillation counter.",
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                {
                    "content": "Mr. Korn is now working on a method of identifying and measuring the highly",
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                    "content": "toxic phenols and other benzene metabolites using G.C. analysis.",
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                    "content": "Because the remaining anchovies from the above experiment died within several",
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                    "content": "hours after exposure, a follow-up bioassy was conducted with adult fish.",
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                    "content": "A",
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                    "content": "24-hour TL50 of approximately 4 ppm benzene was determined. It is possible",
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                    "content": "that this low level may be due to the sensitivity of anchovies to stress in",
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                    "content": "captivity, so the bioassy will be repeated after the fish have undergone a",
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                    "content": "longer period of acclimation. Subsequently, another uptake study will be",
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                    "content": "conducted at concentrations lower than 7 ppm.",
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                    "content": "The first in a new series of experiments testing the effects of meta-xylene",
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                    "content": "on northern anchovy embryos and larvae was initiated. Pre-gastrulated",
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                    "content": "embryos were exposed to three initial concentrations of meta-xylene (5, 10,",
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                    "content": "20 ppm) for 24 hours. Results of exposure of pre-gastrulated embryos will",
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                    "content": "be compared with those from exposure after gastrulation in an attempt to",
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                    "content": "determine whether the change in membrane permeability with gastrulation is",
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                    "content": "correlated with differences in hatch and survival of embryos.",
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                    "content": "10",
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                {
                    "content": "Analyses",
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                    "content": "of Tuna,\" to be held at Nantes, France, September 2-13. Dr. Rothschild",
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                    "content": "population dynamics to consider present and future studies in the field.",
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                    "content": "and the second meeting, with tuna researchers from various countries to",
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                    "content": "and Statistics (SCRS) is Convenor of the Workshop, and Dr. Fox is a member",
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                    "content": "Scientists on Stock Assessment of Tuna, also in Nantes.",
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                    "content": "will spend most of September at the SWFC's Honolulu Laboratory to observe",
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                    "content": "experimental work being conducted on tunas. He will then return to Cali-",
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                    "content": "fornia to attend the Tuna Conference at Lake Arrowhead in early October",
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                    "content": "FAX Advisory Program",
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                    "content": "Mr. L. Eber, Fishing Information Systems Task Leader, reports that the",
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                    "content": "tropical tuna fishing fleet on weekends, to fill a gap in the SWFC trans-",
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                    "content": "interest in maintaining a high level of cooperation from tuna fishermen",
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                    "content": "in observing and reporting environmental data in exchange for the advisory",
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                    "content": "verbal advisories when appropriate and to respond to direct requests from",
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                    "content": "tuna vessels for information in specific situations.",
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                    "content": "provide environmental information to the tuna fisherman on an experimental",
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                    "content": "basis, to enlist his participation in developing the potential application",
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                    "content": "STOCK AND RECRUITMENT INVESTIGATIONS",
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                    "content": "stimuli on the schooling of squid (Loligo opalescens) and will attempt",
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                    "content": "experiments on squid both on board ship and in the laboratory at the",
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                    "content": "of Loligo while on a 3-week cruise aboard the University of California",
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                    "content": "the SWFC aquarium for studying schooling behavior. This includes a large",
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                    "content": "can be photographed with a 35 mm camera with motor drive. She has also",
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                    "content": "two, three, or six squid.",
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                    "content": "Laboratory-Cultured Foods",
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                    "content": "The growth rate of northern anchovy is an essential element in any model",
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                    "content": "designed to interpret year class success or estimate larval survival. The",
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                    "content": "difficulty in obtaining information on growth rates has always been that",
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                    "content": "it has not been possible to rear these fishes through metamorphosis in a",
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                    "content": "controlled laboratory environment with known kinds and quantities of food.",
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                    "content": "This month, Fishery Biologist John Hunter, assisted by Biological Technician",
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                    "content": "C. Sanchez, at the La Jolla Laboratory, report that they have successfully",
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                    "content": "22°℃ for periods up to 35 days, at which time the larvae reached an average",
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                    "content": "which occurs at about 35 mm. The larvae were fed wild plankton supplemented",
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                    "content": "by brine shrimp napulii (Artemia salina). In the ensuing years culture",
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                    "content": "techniques using laboratory-cultured foods for larval anchovy gradually",
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                    "content": "developed: The dinoflagellate, Gymnodinium splendens for the first 5 days",
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                    "content": "(Lasker, et al.); the harpacticoid copepod, Brachionus plicatilus (Theilacker",
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                    "content": "and McMaster), to about 20 days during which time the fish grew to about",
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                    "content": "in culturing the copepod, Tisbe furcata, which supplied the missing link,",
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                    "content": "that is, provided a food other than Artemia for larvae older than 20 days",
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                    "content": "(greater than 10 mm). In all previous attempts larvae gradually died",
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                    "content": "when fed Artemia (the so-called \"Artemia syndrome\"), and what remained",
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                    "content": "than 10 mm.",
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                    "content": "Foods used by Dr. Hunter in rearing included Gymnodinium, Brachionus,",
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                    "content": "rearing temperature of 16℃. Fifteen larvae were removed every other day",
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                    "content": "during the rearing period to measure the growth rate and these data will",
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                    "content": "be used in various mathematical models under development at the Center.",
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                    "content": "No previous growth data existed for anchovy reared to metamorphosis under",
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                    "content": "known environmental conditions. Of the 3,000 eggs originally stocked in",
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                    "content": "the tank, 13% survived to metamorphosis.",
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                    "content": "Dr. Ahlstrom, Senior Scientist at the La Jolla Laboratory, reports that",
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                    "content": "projects continued on working up life history series for the Handbook on",
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                    "content": "Fish Larvae of the California Current. One of the workers on this project,",
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                    "content": "Ms. April McLean, will be terminated owing to reduced funding of the",
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                    "content": "Smithsonian contract.",
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                    "content": "Ms. McLean has been preparing meristic and morpho-",
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                    "content": "metric tables on bothid flatfish larvae, presently Syacium ovale.",
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                    "content": "The manuscript by Ms. Elizabeth Stevens, Biological Technician and Dr.",
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                    "content": "Ahlstrom, dealing with neuston (surface) collections made on extended",
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                    "content": "David Starr Jordan cruise 7205, will not be submitted to the International",
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                    "content": "Council for the Exploration of the Sea as originally planned, but will be",
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                    "content": "prepared for presentation at the California Cooperative Oceanic Fisheries",
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                    "content": "Conference instead.",
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                    "content": "Dr. H. Geoffrey Moser, Fishery Biologist at the La Jolla Laboratory, reports",
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                    "content": "that progress continues on the guide to the identification of eastern",
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                    "content": "Pacific scorpaenid larvae. The section of Ectreposebastes and Scorpaenodes",
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                    }
                },
                {
                    "content": "3",
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                    "content": "3",
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                },
                {
                    "content": "18+4*",
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                    "content": "31",
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                {
                    "content": "*4",
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                    "content": "lost",
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                    "content": "tag",
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                },
                {
                    "content": "Total",
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                    "content": "21",
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                    "content": "21",
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                    "content": "21",
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                {
                    "content": "31",
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                },
                {
                    "content": "94",
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                {
                    "content": "17",
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            ],
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                {
                    "content": "area and the larvae occur in nearshore plankton tows off southern California",
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                    ]
                },
                {
                    "content": "and Baja California. The illustrations of the larvae of S. guttata are com-",
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                },
                {
                    "content": "pleted and the descriptions are near completion. Larvae of another species",
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                    ]
                },
                {
                    "content": "of this genus, S. sonorae, will also be described in this paper; the illus-",
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                    ]
                },
                {
                    "content": "trations have already been completed. The only remaining genus to be described ,",
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                },
                {
                    "content": "for the identification guide is Pontinus.",
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                    ]
                },
                {
                    "content": "Work on the trawl collections resulting from the cooperative project with",
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                },
                {
                    "content": "Dr. C. Matthews of the University of Baja California continued during the",
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                },
                {
                    "content": "month of August. Summer students Elaine Carlin and Jack Christian sorted,",
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                },
                {
                    "content": "identified and took basic meristics of fishes representing almost half of",
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                },
                {
                    "content": "the collection made by Dr. Moser during the Februrary expedition to Magdalena",
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                },
                {
                    "content": "Bay.",
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                },
                {
                    "content": "Mr. K. Lal, California Department of Fish and Game Biologist is working",
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                    "content": "with Dr. Lasker at the La Jolla Laboratory to induce spawning and captivity",
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                },
                {
                    "content": "of striped bass held in seawater.",
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                    "content": "The experiment on rearing of striped",
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                },
                {
                    "content": "bass larvae in increasing salinities was terminated after 40 days. During",
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                },
                {
                    "content": "this period, 1-day old larvae hatched in fresh water were passed through",
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                },
                {
                    "content": "a salinity gradient, until they reached 100% seawater, when 33 days old.",
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                },
                {
                    "content": "The larvae survived well in 60% seawater, but after acclimation to 80%",
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                },
                {
                    "content": "seawater, when 29 days old, mortality shot up for some unknown reason.",
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                },
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                    "content": "Adult striped bass were continued to be held in four experimental tanks",
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                },
                {
                    "content": "in seawater under constant temperature (19°℃) and photoperiod (15L:9D).",
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                },
                {
                    "content": "Biopsy showed that the females found in tank I with mature eggs above 0.5",
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                },
                {
                    "content": "mm diameter in July 1974, had regressed instead of developing further.",
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                },
                {
                    "content": "The number of ripe males in tank IV also decreased from 9 to 3.",
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                    ]
                },
                {
                    "content": "Further observations on the effect of red light were discontinued. The",
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                },
                {
                    "content": "light intensity in all the tanks was reverted to 60 watts daylight and",
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                },
                {
                    "content": "12 watts night light. The length and weight of all fish was recorded.",
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                },
                {
                    "content": "Five fish with stunted growth and 14 fish with sex yet undetermined were",
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                },
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                    "content": "removed from the experimental tanks and the remaining tagged fish were",
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                },
                {
                    "content": "regrouped as follows :",
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                },
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                    "content": "Tanks",
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                },
                {
                    "content": "I",
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                {
                    "content": "II",
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                },
                {
                    "content": "III",
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                    "content": "IV",
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                    ]
                },
                {
                    "content": "Total",
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                    ]
                },
                {
                    "content": "Remarks",
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                },
                {
                    "content": "No. of males",
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                },
                {
                    "content": "10",
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                {
                    "content": "10",
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                },
                {
                    "content": "10",
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                },
                {
                    "content": "2*",
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                },
                {
                    "content": "32",
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                },
                {
                    "content": "*2 lost tag",
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                    "content": "Food",
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                    "content": "Agriculture",
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                    "content": "Organization",
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                    "content": "18",
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            "lines": [
                {
                    "content": "Discussions were held with Dr. Lasker regarding experimental work for the",
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                    "content": "the objective to achieve maturation and spawning of striped bass out of",
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                    "content": "season and before the end of 1974.",
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                {
                    "content": "SURVEY SYSTEMS ANALYSIS INVESTIGATIONS",
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                    "content": "Scientists on Jordan to \"Calibrate\" Acoustic System for Biomass Assessment",
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                    "content": "plane spotter. Cruise Leader is Lt. R. Hewitt of the NOAA Corps, on detail",
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                    "content": "to the La Jolla Laboratory. Purpose of the cruise is to \"calibrate\" the",
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                    "content": "acoustic system aboard the Jordan which has the capability to count and",
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                    "content": "measure anchovy fish schools and determine their target strength. When",
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                    "content": "fish schools are located by the plane, the Jordan locates them with its",
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                    "content": "sonar and the purse seiner moves in to capture the same school, to confirm",
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                    "content": "the sonar measurements. The California Fish and Game research vessel,",
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                    "content": "in the project. The unique experiment, sanctioned by the California Fish",
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                    "content": "compaction and thickness of the schools in the vertical plane. The fish",
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                    "content": "compact portion of the matrix. No comparison has yet been made of the",
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                    "content": "computer-derived index of school biomass and biomass estimated by the",
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                    "content": "purse seine skipper.",
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                    "content": "The joint operation with the chartered seiners should provide a firm base",
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                    "content": "information will be used for conducting the first automated hydroacoustic",
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                    "content": "survey in the Los Angeles Bight, with anchovy as the target species, during",
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                    "content": "the last 2 weeks of the cruise.",
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                {
                    "content": "Manual of Methods for Pelagic Fish Egg and Larva Surveys Nears Completion",
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                    "content": "regions.",
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                    "content": "and interested investigation leaders at the La Jolla Laboratory on August 14.",
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                    "content": "TUNA ASSESSMENT AND DEVELOPMENT INVESTIGATIONS",
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                    "content": "Anchovy From Fourth Shipment Reach Hawaii in Excellent Condition;",
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                    "content": "calculated total weight estimated at 1,317 pounds of anchovy. Prior to",
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                    "content": "sailing it was noticed that live fish were being picked up in the after",
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                    "content": "water outlet, the result of a greatly increased pressure head created",
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                    "content": "by the angle of the tanker aboard the Matsonia.",
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                    "content": "At the completion of the unmonitored voyage to Honolulu, a conservatively",
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                    "content": "estimated 410 pounds of anchovy in excellent condition were removed from",
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                    "content": "the tanker and placed in holding tanks at Kewalo Basin. Less than 30 pounds",
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                    "content": "of dead fish, well decomposed, were in the bottom of the tank, indicating",
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                    "content": "slight mortality during the trip. It is estimated from these known amounts",
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                    "content": "that at least 800 pounds of anchovy were lost overboard during the shipment,",
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                    "content": "probably having been expelled through the water outlet. It seems likely that",
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                    "content": "most of the lost fish were alive.",
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                {
                    "content": "Four skipjack tuna fishing vessels in Honolulu expressed interest in buying",
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                    "content": "the anchovy at $2.00 per pound. Those selected, by drawing, expressed",
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                    "content": "reservation at the suitability of the large anchovy for fishing the small-",
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                    "content": "and medium-sized skipjack tuna presently in the Hawaiian area.",
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                    "content": "The tanker was returned to Long Beach, where modifications are underway",
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                    "content": "to obviate the loss of live fishes. Bait density tests are also being",
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                    "content": "conducted at Long Beach by Roger Green, Leader, Baitfish Project, and",
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                    "content": "Fishery Methods and Equipment Specialist Don Aasted.",
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                    "content": "Manuscript Revision and Report Writing Occupy Scientists of Fishery",
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                    "content": "Analysis Program",
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                    "content": "A major emphasis of the Fishery Analysis Program of the Honolulu Laboratory",
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                    "content": "under the leadership of Dr. Robert Skillman, Fishery Biologist, is on stock",
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                    "content": "assessment in the Pacific and Indian Oceans. During the month of August",
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                    "content": "progress in the assessment of skipjack tuna resources and assessment of",
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                    "content": "other tuna and tunalike resources took the form of manuscript revision",
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                {
                    "content": "and report writing. Mr. Richard Uchida, Fishery Biologist, continued to",
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                    "content": "make minor revisions of his manuscript \"Reevaluation of fishing effort",
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                {
                    "content": "and apparent abundance in the Hawaiian skipjack tuna, Katsuwonus pelamis,",
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                {
                    "content": "fishery, 1948-70.\" and also of the draft of a working paper \"Recent de-",
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                    "content": "velopments in fisheries for skipjack tuna, Katsuwonus pelamis, in the",
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                    "content": "central and western Pacific and Indian Oceans.\" This working paper was",
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                    "content": "prepared for the IOFC/IPFC Tuna Working Party at the request of J.A. Gulland,",
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                    "content": "FAO Fishery Resources Divison. Mr. Uchida spent the remainder of the month",
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                    "content": "compiling and summarizing tuna catch data from the Pacific Ocean for 1960-72",
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                    "content": "and preparing a short report describing recent developments in fisheries",
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                    "content": "for skipjack tuna.",
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                    "content": "Dr. Skillman revised the manuscript \"An assessment of the South Pacific",
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                    "content": "albacore, Thunnus alalunga, fishery, 1953-72\" following outside review.",
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                    "content": "alone the catch reached an estimated 380 metric tons, which was 344 metric",
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                    "content": "tons below the catch in August 1973 and 349 metric tons less than the long-",
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                    "content": "term August average.",
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                    "content": "Pulou Niuatoa, Government of American Samoa employee, recorded the lengths",
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                    "content": "of 1,967 albacore from 42 vessels during the period July 26 to August 23.",
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                    "content": "He collected 33 sets of catch and effort data. Utilizing the data from",
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                    "content": "10 vessels only, an average size of 89.0 cm was determined and an albacore",
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                    "content": "catch per 100 hooks of 3.13.",
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                    "content": "PROJECT PROPOSAL DEVELOPED FOR BUREAU OF LAND MANAGEMENT",
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                    "content": "ENVIRONMENTAL STUDY",
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                    "content": "Land Management for environmental information on the impact of possible",
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                    "content": "offshore oil and gas development in the area of the southern California",
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                    "content": "Bight, a team headed by Mr. David Mackett, SWFC Planning Officer, is",
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                    "content": "writing a comprehensive plan for environmental monitoring and baseline",
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                    "content": "studies in this area. According to Mr. Mackett, this study will provide",
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                    "content": "the mechanisms to assist BLM in answering the \"what if\" questions, i.e.,",
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                    "content": "What would happen if an oil spill occurred in any particular area? and",
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                    "content": "What are the likely effects on the fish life, recreational fishing and",
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                    "content": "commercial fishing, etc., in the ocean environment?",
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                    "content": "In preparation for writing the proposal a SWFC contingent which included",
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                    "content": "Drs. Rothschild, R. Lasker, E. Ahlstrom, R. Owen, and Messrs. N. Abramson",
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                    "content": "and Mackett met in Boulder, Colorado, August 5-9 with BLM and Environmental",
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                    "content": "Research Laboratory staff to discuss ways of designing baseline and monitor-",
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                    "content": "Interior.",
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                    "content": "The second phase would consist of further data collection, the conduct of",
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                    "content": "experiments, and analysis that will be required to increase the accuracy",
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                    "content": "or precision of the information required for making better decisions re-",
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                },
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                    "content": "garding the impacts of oil and gas development on the environment.",
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                    "content": "On August 21-23, Mr. Mackett and Dr. Ahlstrom flew to Washington, D.C.",
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                    "content": "to review the finished plan with Mr. David Wallace, Associate Administrator",
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                    "content": "for Marine Resources, and other NOAA and NMFS officials. It was recommended",
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                    "content": "by the reviewing officials that the proposal be rewritten to conform in",
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                    "content": "format to other NOAA proposals to BLM. Other elements in NOAA -- Environ-",
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                {
                    "content": "mental Research Laboratory, National Ocean Survey, as well as other lab-",
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                    "content": "oratories in NMFS, are working cooperatively on proposals to BLM for other",
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                    "content": "offshore continental areas, and September 25 has been set for presentation",
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                    "content": "of the formal NOAA plan to BLM.",
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                    "content": "PUBLIC AFFAIRS",
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                    "content": "Fishery Biologists Paul Smith and David Kramer will represent the National",
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                    "content": "Marine Fisheries Service's La Jolla Laboratory in the 1974-75 \"Meet the",
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                    "content": "Scientist\" lecture program, sponsored by the Greater San Diego Industry",
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                    "content": "Education Council of the County Department of Education. Dr. Smith who",
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                    "content": "has agreed to speak to students at the senior high and community college",
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                {
                    "content": "level has selected, \"Fisheries and Fishery Research in the California",
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                    "content": "Current\" as his topic. Mr. Kramer will discuss \"Current trends in fishery",
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                    "content": "research\" at community colleges during the coming school year. This is",
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                    "content": "the 3rd year of NMFS participation in the program to acquaint students",
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                    "content": "with scientific research being carried out in the San Diego area.",
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                    "content": "SEMINARS",
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                    "content": "August 1",
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                    "content": "Dr. Maynard A. Steinberg, Director of the NMFS Pacific",
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                    "content": "Utilization Research Center in Seattle, gave an informal",
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                    "content": "talk to the staff at the Honolulu Laboratory on the",
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                    "content": "activities of his organization.",
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                    "content": "MEETINGS AND TRAVEL",
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                    "content": "July 28-",
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                    "content": "August 1",
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                    "content": "Dr. E. Hobson, of the Tiburon Laboratory, attended a",
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                    "content": "Shark Behavior Workshop convened by ONR and NSF at",
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                    "content": "Monterey, California.",
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                    "content": "August 1",
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                    "content": "Mr. R. Shomura, Director of Honolulu Laboratory, attended",
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                    "content": "a meeting called by the Hawaii Department of Land and",
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                {
                    "content": "Natural Resources to discuss the proposed Wilderness",
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                    "content": "Area for the Northwest Hawaiian Islands, also known as",
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                    "content": "the Leeward Hawaiian Islands. The boundary of the",
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                    "content": "Wilderness Area is the key point of dispute between",
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                    "content": "the State of Hawaii and the Department of the Interior.",
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                    "content": "22",
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                    "content": "Cuthbert Love, Oceanographer -",
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            "content": "UNITED"
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            "content": "AMERICA"
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            "content": "ED STATES OF AM"
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            ],
            "content": "HONOLULU"
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            "content": "S"
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            ],
            "content": "LA JOLLA"
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        {
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                    "length": 7
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            "content": "TIBURON"
        },
        {
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                    "length": 26
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            ],
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            ],
            "content": "SOUTHWEST FISHERIES CENTER"
        },
        {
            "spans": [
                {
                    "offset": 102,
                    "length": 27
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            ],
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            ],
            "content": "MONTHLY REPORT- AUGUST 1974"
        },
        {
            "spans": [
                {
                    "offset": 130,
                    "length": 19
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            ],
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            ],
            "content": "RESEARCH HIGHLIGHTS"
        },
        {
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                {
                    "offset": 150,
                    "length": 4
                }
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                }
            ],
            "content": "Page"
        },
        {
            "spans": [
                {
                    "offset": 155,
                    "length": 16
                }
            ],
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                }
            ],
            "content": ". Publications 1"
        },
        {
            "spans": [
                {
                    "offset": 172,
                    "length": 155
                }
            ],
            "boundingRegions": [
                {
                    "pageNumber": 1,
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                }
            ],
            "content": ". Scientists Evaluate Feasibility of Collecting and Holding Live Albacore. 3 . Antibiotics Reducing Mortality of Captive Salmon; Fish Showing Good Growth 5"
        },
        {
            "spans": [
                {
                    "offset": 328,
                    "length": 76
                }
            ],
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                }
            ],
            "content": ". Pelagic Red Crabs Constitute Large Untapped Resource in Eastern Pacific. 6"
        },
        {
            "spans": [
                {
                    "offset": 405,
                    "length": 161
                }
            ],
            "boundingRegions": [
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                    "pageNumber": 1,
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                }
            ],
            "content": ". Physiological Data Suggest Definition of Limits of Skipjack Tuna Habitat 8 Summary Report of Porpoise Research in Preparation for Commerce Report to Congress 9"
        },
        {
            "spans": [
                {
                    "offset": 567,
                    "length": 180
                }
            ],
            "boundingRegions": [
                {
                    "pageNumber": 1,
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                }
            ],
            "content": "· Report on Results of CF&G/NMFS Cooperative Study on Stock Assessment of Southern California Recreational and Commercial Fisheries Presented to State-Federal Steering Committee 11"
        },
        {
            "spans": [
                {
                    "offset": 748,
                    "length": 38
                }
            ],
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                }
            ],
            "content": ". World Tuna System Study Completed 11"
        },
        {
            "spans": [
                {
                    "offset": 787,
                    "length": 88
                }
            ],
            "boundingRegions": [
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                    "pageNumber": 1,
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                }
            ],
            "content": "National Weather Service Becomes Full-Time Participant in NMFS FAX Advisory Program . 13"
        },
        {
            "spans": [
                {
                    "offset": 876,
                    "length": 92
                }
            ],
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                    "pageNumber": 1,
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                }
            ],
            "content": "· Northern Anchovy Successfully Reared Through Metamorphosis on Laboratory-Cultured Foods 15"
        },
        {
            "spans": [
                {
                    "offset": 969,
                    "length": 70
                }
            ],
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                    "pageNumber": 1,
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            ],
            "content": ". Anchovy from Fourth Shipment Reach Hawaii in Excellent Condition. 19"
        },
        {
            "spans": [
                {
                    "offset": 1040,
                    "length": 91
                }
            ],
            "boundingRegions": [
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                }
            ],
            "content": ". Project Proposal Developed for Bureau of Land Management Environmental Study NOAA/NMFS 21"
        },
        {
            "spans": [
                {
                    "offset": 1132,
                    "length": 47
                }
            ],
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            ],
            "content": "SOUTHWEST FISHERIES CENTER La Jolla, California"
        },
        {
            "spans": [
                {
                    "offset": 1180,
                    "length": 58
                }
            ],
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            ],
            "content": "HONOLULU LABORATORY LA JOLLA LABORATORY TIBURON LABORATORY"
        },
        {
            "spans": [
                {
                    "offset": 1239,
                    "length": 26
                }
            ],
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                }
            ],
            "content": "MONTHLY REPORT-AUGUST 1974"
        },
        {
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                    "length": 22
                }
            ],
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            ],
            "content": "STATUS OF PUBLICATIONS"
        },
        {
            "spans": [
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                    "offset": 1289,
                    "length": 9
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            ],
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            ],
            "content": "Published"
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        {
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                    "length": 185
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            ],
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            ],
            "content": "Bayliff, William H. and Brian J. Rothschild. 1974. Migrations of yellow- fin tuna tagged off the southern coast of Mexico in 1960 and 1969. Bull. Inter-Am. Trop. Tuna Comm. 16(1): 1-64."
        },
        {
            "spans": [
                {
                    "offset": 1485,
                    "length": 393
                }
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            ],
            "content": "The map method, the Jones method, the variance-covariance method, and the Skellam method were used to study the migrations of tagged yellowfin tuna released off the southern coast of Mexico in 1960 and 1969. The first three methods are all useful, and each presents information which is complementary to that presented by the others. The Skellam method, as used in this report, is less useful."
        },
        {
            "spans": [
                {
                    "offset": 1879,
                    "length": 433
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            ],
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            ],
            "content": "The movements of the tagged fish released in 1960 appeared to have been strongly directed, but this was probably caused principally by the distribution of the fishing effort. The effort was much more widely distributed in 1970, and the movements of the fish re- leased in 1969 appeared to have been much less directed. The cor- relation coefficients derived from the variance-covariance method showed that it was not random, however."
        },
        {
            "spans": [
                {
                    "offset": 2313,
                    "length": 286
                }
            ],
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                }
            ],
            "content": "The small fish released in the Acapulco and 10ºN-100°W areas in 1969 migrated to the Manzanillo area near the beginning of February 1970. The medium and large fish released in the same areas in the same year tended to migrate to the southeast throughout the first half of 1970, however."
        },
        {
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            ],
            "content": "Hester, Frank J., and Everet C. Jones. 1974. A survey of giant clams, Tridacnidae, on Helen Reef, a western Pacific atoll. U.S. Natl. Mar. Fish. Serv., Mar. Fish Rev. 36(7): 17-22. (MFR paper 1071.)"
        },
        {
            "spans": [
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                    "offset": 2799,
                    "length": 72
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            ],
            "content": "This report does not constitute publication and is for information only."
        },
        {
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                }
            ],
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            ],
            "content": "Transects and areal surveys by swimmers were used to estimate the standing stock of giant clams, Tridacnidae, at Helen Reef, Western Caroline Islands in March 1972. Estimates were Tridacna crocea 3.7 x 106, T. maxima 1.7 x 106, Hippopus hippopus 44.6 x 103, T. derasa 32.8 x 103, and T. gigas 49.8 x 103. T. squamosa was not as abundant or was identified as T. maxima. Most T. gigas and T. derasa were large, suggesting low or erratic recruitment."
        },
        {
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            ],
            "content": "Korn, S. and R. Earnest. 1974. Acute toxicity of twenty insecticides to striped bass, Morone saxatilis. California Fish and Game, 60(3): 138-131."
        },
        {
            "spans": [
                {
                    "offset": 3466,
                    "length": 390
                }
            ],
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                }
            ],
            "content": "This paper describes acute toxicity of 20 different insecticides to juvenile striped bass. The insecticides Endrin, Endosulfan, DDT, and Dursban are shown to be most toxic, while Carbaryl and Abate proved least toxic. Fourteen other insecticides were also tested and are listed in order of decreasing toxicity. Some ad- vantages of intermittent versus static bioassay testing are discussed."
        },
        {
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                }
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            ],
            "content": "Matsumoto, Walter M. 1974. The skipjack tuna, Katsuwonus pelamis, an underutilized resource. U.S. Natl. Mar. Fish. Serv., Mar. Fish. Rev. 36(8): 26-33. (MFR paper 1077.)"
        },
        {
            "spans": [
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                    "offset": 4027,
                    "length": 495
                }
            ],
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            ],
            "content": "The skipjack tuna is the only species of tuna presently exploited commercially that can withstand large increases in fishing pressure. This article describes the biology and ecology of the skipjack tuna in the Pacific Ocean and the distribution of skipjack tuna fisheries, giving recent catch statistics and including assumed movement patterns of Pacific stocks. Opportunities exist for the increased develop- ment of the skipjack tuna resource, a benefit to the economy of the developer nation."
        },
        {
            "spans": [
                {
                    "offset": 4523,
                    "length": 188
                }
            ],
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                }
            ],
            "content": "Rothschild, Brian J. 1974. The California gray whale. Introductory remarks California Gray Whale Workshop, Univ. Calif., San Diego, August 21-22, 1972. Mar. Fish. Rev., Spec. No. 36(4): 2."
        },
        {
            "spans": [
                {
                    "offset": 4712,
                    "length": 27
                }
            ],
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            ],
            "content": "Approved by Center Director"
        },
        {
            "spans": [
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                    "length": 199
                }
            ],
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                }
            ],
            "content": "\"Field criteria for survival of anchovy larvae: The relation between inshore chlorophyll maximum layers and successful first feeding\" by Reuben Lasker. For publication in the Fishery Bulletin (U.S.)."
        },
        {
            "spans": [
                {
                    "offset": 4940,
                    "length": 116
                }
            ],
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                }
            ],
            "content": "\"The American Samoa longline fishery, 1966-71\" by Howard 0. Yoshida. For publication in the Fishery Bulletin (U.S.)."
        },
        {
            "spans": [
                {
                    "offset": 5057,
                    "length": 1
                }
            ],
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            ],
            "content": "2"
        },
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            ],
            "content": "\"Recent development in fisheries for skipjack tuna, Katsuwonus pelamis, in the central and western Pacific and Indian Oceans\" by Richard N. Uchida. [A draft report forwarded to the Center Director for the IOFC/IPFC Working Party on Tuna Stock Assessment, 16-18 September 1974, Nantes, France.]"
        },
        {
            "spans": [
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            ],
            "content": "ALBACORE FISHERIES INVESTIGATIONS"
        },
        {
            "spans": [
                {
                    "offset": 5387,
                    "length": 71
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            "content": "Scientists Evaluate Feasibility of Collecting and Holding Live Albacore"
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            "content": "During the July-August cruise of the Jordan, efforts were made to evaluate the feasibility of collecting and holding live albacore, which included the testing of a life support system designed to transport albacore under anesthesia, testing of various anesthetics and dosages, and development of methods for handling fish to be placed under anesthesia and reviving anesthetized fish. The objective is to be able to study the response of live animals to their environment."
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            "content": "According to Dr. R. Michael Laurs, who conducted the experiments, the life support system on the Jordan, which accommodated up to four fish, consisted of about a 100-gallon rectangular, fiberglass tank, equipped with pump- tubing/mask arrangement which was used to force water over the gills of anesthetized fish held in slings suspended in the tank. MS 222 (tricane methanesulfonate), a common anesthetic used on fishes, was dissolved and oxygen gas bubbled into the water pumped over the fishes' gills. A recycling water chiller was used to maintain the desired water temperature."
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            "content": "Six jig-caught and two live-bait caught fish in good condition were selected as test animals in the live transport study. Tests were conducted using MS 222 alone and in combination with Flaxedil for anesthetizing the fish. Best results were obtained using MS 222 alone at a concentration of approxi- mately 2 milligrams per gallon of seawater. Data were also collected on the time required to anesthetize albacore and also to recover from anesthesia with good vital signs for periods in excess of 15 hours."
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            "content": "An unfortunate event occurred near the end of the cruise while transport- ing four live fish under anesthesia in the life support system back to shore. A freshly charged 12-volt DC battery used to power the pump in the life support system failed during the night and the fish died of suf- focation."
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            "content": "Based on data collected during this cruise, Dr. Laurs believes that it is feasible to hold and transport albacore tuna under anesthesia and that the life support system designed for this is suitable except for a minor modi- fication -- incorporation of a converter to use ship's power to operate the pump."
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            "content": "3"
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            "content": "Scientists on Jordan Conduct Studies on the Nearshore Availability of Albacore off Southern California and Related Environmental Conditions"
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            "content": "For the past several years, including this year, the annual albacore fishery forecast issued by the La Jolla Laboratory has indicated that the major portion of the albacore catch for the season would be taken in waters north of San Francisco. The forecasts have been accurate in that the major portions of the seasonal catches for the last several years have been from \"northern\" waters. Partly in response to the NMFS fore- casts, most of the albacore vessels have moved to \"northern\" waters early in the season, leaving a void in fish scouting and fishing effort in southern California where albacore catches were high many years ago."
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            "content": "As part of an evaluation of the albacore seasonal forecasts, efforts were made this season to determine the availability of albacore in northern Baja-southern California waters. Fish scouting/oceanographic observations were conducted by three commercial albacore jig fishing vessels on charter to the American Fishermen's Research Foundation working cooperatively with the La Jolla Laboratory, and fish scouting/oceanographic observations and other studies were conducted from the NOAA research vessel, Jordan, during July and August 1974. The fishing vessels on charter to AFRF worked the area from off San Diego south to Guadalupe Island and northward outside the Channel Islands. No commercial concentrations of albacore were found by the fishing vessels."
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            "content": "The Jordan worked the area off San Diego out to San Juan Seamount and in the vicinity of the Channel Islands. Scouting efforts on the Jordan con- sisted of trolling eight lines from dawn to dark, and visual watches from the wheelhouse for signs of fish. No commercial concentrations of albacore were sighted or caught during the Jordan cruise. However, small catches, mostly 4-6 pound fish, were made in the vicinity of San Juan Seamount."
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            "content": "A total of 31 albacore was caught during the cruise. Length and weight measurements were taken on all the fish. Complete digestive tract and heart plucks were collected from 15 fish for Dr. Ted Folsom of Scripps Institution of Oceanography for radionucleide study. Heads were collected from 10 fish for removal of otoliths ashore for aging studies being con- ducted at the Honolulu Laboratory."
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            "content": "COASTAL FISH COMMUNITIES INVESTIGATIONS"
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            "content": "Changes in Food Habits with Size Studied in the Shiner Surfperch, Cymatogaster aggregata"
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            "content": "Dr. Edmund Hobson, Project Leader at the Tiburon Laboratory, working with Fishery Biologist Tony Chess, continued to concentrate this month on feeding behavior of juvenile fishes in the continued investigation of near- shore fish communities. Work this month centered on the shiner surfperch, Cymatogaster aggregata, which is among the most widespread of the surfperches, an important group of sport fishes."
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            "content": "4"
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            ],
            "content": "The shiner surfperch has been found to feed only by day when it is a small juvenile, and to feed by night as well when it grows larger. This situation is similar to that described last month for the olive rockfish, Sebastes serranoides. The shiner surfperch, however, experiences this behavioral change at a slightly larger size -- about 70 mm, as compared to about 60 mm for the olive rockfish. Furthermore, the larger shiner surfperch continues to feed regularly by day in addition to feeding at night, whereas the larger olive rockfish becomes predominantly nocturnal. These differences in behavior between the two species are being related to morphological characteristics, and to the way these fish capture prey and the nature of their prey. The observations are also being related to the distribution of prey in the water column during both day and night, as determined by the plankton sampling described earlier."
        },
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            "content": "COASTAL FISHERIES INVESTIGATIONS"
        },
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            "content": "Antibiotics Reducing Mortality of Captive Salmon; Fish Showing Good Growth"
        },
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            ],
            "content": "Mr. Lloyd Richards, Biological Technician, reports that the coho salmon rearing program, a cooperative project of the Tiburon Laboratory and Sea Grant, California Department of Fish and Game, and San Francisco TYEE Club (a conservation-oriented sport fishermen's group) has continued to generate interest in the Bay Area. A second TV station featured the rearing program in the evening news."
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            ],
            "content": "Of the original 10,000 fish stocked in our pen in early July, about 7,500 remain. Mortality has been about 25 fish per day, during an outbreak of bacterial disease when 230 fish died in 3 days. Pathologists of the Cali- fornia Department of Fish and Game diagnosed the bacteria as Bacillus columnaris. After a week's treatment with terramycin, included in the feed, the mortality rate dropped to \"normal.\""
        },
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            "content": "Stan Smith, a volunteer worker and student from San Francisco State University, has been heavily involved in the program. As part of his thesis work, he has been monitoring levels of oxygen, salinity, temperature, and pH within and outside the rearing pen. Of greatest concern is the drop in oxygen level down to 5.3 ppm in the pen during early morning hours. The range has been within 5.3 and 7.9 ppm. Temperature has ranged between 62-69º and salinity 23-30 ppm."
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            "content": "Net clogging remains the principal problem. Brown, green, and red algae proliferate, and recently hydroids and barnacles have also become a nuisance. Two water pumps provided by the TYEE Club have been installed to increase the exchange of water in the pen. Two automatic feeders have also been installed. The present daily ration of feed is approximately three percent of the total weight of the fish, which are showing good growth and appear to be in good condition."
        },
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            "content": "Pelagic Red Crabs Constitute a Large Untapped Resource in the Eastern Pacific"
        },
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            "content": "One of the primary uses of red crabs is as a feed ingredient in salmonid aquaculture, primarily to pigment the flesh of salmon. Most of the feed- ing experiments conducted to date have been with coho salmon. Experiments were started this month under the direction of Mr. Sus Kato, Fishery Biologist, at the Tiburon Laboratory, at a commercial trout farm to attempt to pigment the flesh of rainbow trout, and to then do a market analysis to learn the acceptability of the product."
        },
        {
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            "content": "One group of 50 trout are being fed specially formulated red crab feed provided by Pacific Fishery Products Technology Laboratory. A second group of fish are being fed vacuum-dried whole red crabs as a supplement to the regular diet, and a third group will serve as control."
        },
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            ],
            "content": "A few fish will be sacrificed at the end of the month to determine if the flesh of the trout have become pigmented. The experiment is being con- ducted at the Garrapata Trout Farm, located near Carmel."
        },
        {
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            "content": "Nearly all the commercial firms rearing salmon now want red crabs, accord- ing to Mr. Kato. Additionally, a researcher at San Diego State University reported that lobsters reared on a diet of red crab show signs of good vitality and growth."
        },
        {
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            "content": "Mr. Kato went to Fort Bragg, together with Dr. M. Miyamura, Fishery Con- sultant for Japan Air Lines. They conferred with heads of two firms which are interested in processing sea urchins. Prospects of marketing unused species and by-products were also discussed."
        },
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            "content": "Angler's Guide to the United States Pacific Coast"
        },
        {
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            ],
            "content": "During August work continued on the Angler's Guide being prepared by Fishery Biologist Jim Squire, La Jolla Laboratory, and Susan Smith, Publications Specialist at the Tiburon Laboratory. The Guide describes the marine sport fishes, fishing grounds, and angler facilities along the Pacific Coast from California to Alaska and around the tropical islands of Hawaii, American Samoa, and Guam."
        },
        {
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            ],
            "content": "Ms. Smith spent most of the month preparing the Guide's two descriptive fish lists for final typing, drawing fish illustrations, and preparing a common name index for species described in the fish lists. These two lists (one describing sub-tropical and temperate zone fishes -- the other tropical fishes) will contain over 200 fish illustrations, and at the end of the month all but 10 of these illustrations were completed. The index- ing of over 600 common names of fishes was also completed and submitted for typing."
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            "content": "6"
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            "content": "FISH ENVIRONMENT INVESTIGATIONS"
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            "content": "Activity of Tunas in Rapidly Cooling Water Investigated in Doughnut Tank"
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            "content": "The Life Studies Program of the Honolulu Laboratory has as its long-range goal the generation of a predictive model of tuna distribution, abundance, and availability to fisheries. The model is to be based on the joint physiological and behavioral responses of tunas to environmental variables, determined in part through experimental work with captive fishes. To ex- plore the potential value of such an approach and to provide an objective framework for further experimental work, Drs. William H. Neill and Andrew E. Dizon, Fishery Biologists with the Honolulu Laboratory, have developed a simulation model for the responses of fishes to temperature, a variable of recognized importance in the ecology not only of tunas but also of fishes in general."
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            "content": "Important inputs to the model are the functional relationships between swimming activity of fish and thermal structure of the environment. Drs. Dizon and Neill are conducting a series of cooling experiments in the doughnut tank to establish such relationships for tunas. Water temper- ature is decreased from 27°℃ at about 0.05℃ min-1 while swimming speed and turning tendency of the tunas are monitored."
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            "content": "Experiments with eight skipjack and two yellowfin tunas have been conducted. Both species consistently and dramatically increased their rate of turning when tank temperature decreased to 21.5º-20.5°C. However, swimming speed of skipjack tuna tended to be almost between 27° and 19℃, whereas yellow- fin tuna swam slower (Q10=2.2) as' the water cooled."
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            "content": "Effects of Temperature on Routine Metabolism of Skipjack Tuna"
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            "content": "Productivity of the seas in terms of tuna flesh must depend on whether food supplies are adequate to provide the energy required by tunas for activity and growth. Research Assistants Randolph Chang and Bernard Ito, under the supervision of Dr. William Neill, all of the Honolulu Laboratory, are extending previously completed experiments on routine metabolism of skipjack tuna at a single temperature (24℃) to temperatures throughout the skipjack tuna's zone of thermal tolerance. This will permit estima- tion of the energy required for minimum activity in skipjack tuna at all temperatures where the fish are likely to occur."
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            "content": "Experiments at 18°, 24°, and 29℃ have now been completed. Results can be summarized as follows:"
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            "content": "Temperature ℃"
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            "content": "Number of tests"
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            "content": "Respiration rate (mg 02 g-1 hr-1)"
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            "content": "Median"
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            "content": "Range"
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            "content": "18"
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            "content": "0.66"
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            "content": "0.42-1.03"
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            "content": "0.71"
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            "content": "0.58-0.79"
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            "content": "29"
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            "content": "0.78"
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            "content": "0.64-1.25"
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            ],
            "content": "Thus, routine metabolism of skipjack tuna appears only weakly temperature- dependent, the Q value being between 1.1 and 1.2. This conclusion is consistent with that reached by M. Gordon [Science 159: 87-90, 1968] through respirometric study of minced red and white muscle from skipjack tuna."
        },
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            "content": "From the energetics standpoint, these data suggest that skipjack tuna re- quire (for minimal activity) only about 20% more energy in the warmest parts of their habitat than in the coolest parts. The near-independence of skipjack tuna metabolism and temperature stands in marked contrast to the situation for virtually all other fishes, whose demand for energy typically doubles or trebles for each 10°℃ increase in temperature."
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            "content": "Physiological Data Suggest Definition of Limits of Skipjack Tuna Habitat"
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            "content": "Physiological data obtained recently in experiments and simulation studies conducted by the Life Studies Program of the Honolulu Laboratory are being used to shape answers to the long-standing question of why there are no big skipjack tuna in the eastern Pacific Ocean. These data are being used to define the geographic areas the skipjack tuna can be expected to inhabit on the basis of extremes in temperature and other parameters. Results so far indicate that the smaller skipjack tuna, less than 3 kg or 50 cm in size, can inhabit virtually all of the eastern tropical Pacific above the oxycline. Areas from which larger fish are excluded increase in size with the size of the fish. Fish weighing 8 kg, 70 cm long, are excluded from an area which extends from Cabo Corrientes or San Blas to 145°W, 10ºN, and from there to Panama. Fish of intermediate size are excluded from most of this area, but can move north-south along a 100-mile corridor slightly offshore of Mexico, between the Gulf of Tehuantepec and the Gulf of California. This corridor probably closes seasonally, and may close entirely in some years."
        },
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            ],
            "content": "Fishery Biologist Heeny Yuen, who coordinated the work of the SWFC Honolulu Laboratory at the 16th annual Hawaiian International Billfish Tournament held in July, has completed his report of the tournament. This includes a cursory analysis of the scientific information collected by the NMFS team under Mr. Yuen's direction."
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            "content": "8"
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            "content": "Biological Aid Elliott Kawahara has completed plotting the results of longline catches of black marlin in the Pacific and Indian Oceans accord- ing to Japanese records for the years 1962-71."
        },
        {
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            "content": "MARINE MAMMAL INVESTIGATIONS"
        },
        {
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            "content": "Summary Report of Porpoise Research in Preparation for Commerce Report to Congress"
        },
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            ],
            "content": "The entire scientific staff of the Marine Mammal Investigations at the La Jolla Laboratory is devoting maximum effort to the completion of a report due in early September summing up the progress of research under- taken since the beginning of the accelerated porpoise program at the Southwest Fisheries Center almost 2 years ago. This report will be sub- mitted to NMFS for incorporation in the Secretary of Commerce's report to Congress in conformance with the provisions of the Marine Mammal Pro- tection Act of 1972. Items to be covered in the comprehensive report will include results of porpoise life history studies, estimates of porpoise mortality, population estimates derived from the aerial survey, marine mammal watch, development and application of porpoise-saving fishing gear, assessments on the performance of the tuna fleet in alleviating por- poise mortality, and recommendations for future porpoise research."
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            ],
            "content": "Dr. Eric Barham, Porpoise Program Manager, plans to hand-carry the com- pleted report to Washington, D.C. on September 9 for final review."
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            "content": "Dr. Eric Barham, Porpoise Program Manager at the La Jolla Laboratory, reports that Mr. Jerry Jurkovich of the NMFS Northwest Fisheries Center, who has been aboard the seiner, South Pacific, observing the performance of the NMFS-designed, large-volume tuna purse seine net, returned to San Diego on September 1. Mr. Jurkovich is well-satisfied with the per- formance of the experimental purse seine which appears to be effective in reducing porpoise mortality. Preliminary inspection of Mr. Jurkovich's data indicates a low kill rate on 37 porpoise sets."
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            "content": "Three NMFS porpoise observers remain at sea on tuna seiners of the U.S. fleet. An observer is aboard a vessel operating off the coast of Brazil; another is on a seiner fishing outside the Commission Yellowfin Regulatory Area (CYRA) and the third is on a boat still fishing inside the CYRA."
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            "content": "9"
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            "content": "PHYSIOLOGY INVESTIGATIONS"
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            "content": "Experiments Indicate Rapid Uptake of Benzene in Anchovy Larvae and Adults"
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            ],
            "content": "As part of the study of effects of crude oil components on various life stages of fishes, investigator Sid Korn, Fishery Biologist, assisted by Nina Hirsch, Biological Technician at the Tiburon Laboratory, are studying uptake and accumulation of benzene by the northern anchovy. Results of this month's experiments indicate that benzene accumulates very rapidly in certain tissues of larval and adult anchovies."
        },
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            "content": "Newly hatched anchovy larvae were exposed to a concentration of 14"
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            "content": "*C-labeled benzene for 24 hours. After 6 hours the accumulation appeared to be 60X that of initial exposure levels, and after 24 hours levels rose by a factor of 100X. Although there is a possibility of sample contamination due to inadequate rinsing of the surface film on the larvae, in view of the results of subsequent experiments with adult fish, these values do reflect a very high rate of accumulation. New techniques are being evolved to counteract the possibility of sample contamination."
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            "content": "Adult anchovies were acclimated for 2 weeks, then exposed to 7 ppm benzene for 1.5 hours. Measurements were made of levels in the liver, muscle, brain, and gill tissues using the Gas Chromatograph and the scintillation counter. At present, the Gas Chromatograph measures only benzene, while the scintil- lation counter measures all 14C-labeled components and does not distinguish between 14℃ benzene and 14C metabolites of benzene (such as phenols). After only 1-1/2 hours of exposure, levels in the liver, brain, and gill tissue measured by the G.C. method were found to be 6X to 8X the level of initial exposure, and as high as 15X (Tiver tissue) using the scintillation counter. Mr. Korn is now working on a method of identifying and measuring the highly toxic phenols and other benzene metabolites using G.C. analysis."
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            "content": "Because the remaining anchovies from the above experiment died within several hours after exposure, a follow-up bioassy was conducted with adult fish. A 24-hour TL50 of approximately 4 ppm benzene was determined. It is possible that this low level may be due to the sensitivity of anchovies to stress in captivity, so the bioassy will be repeated after the fish have undergone a longer period of acclimation. Subsequently, another uptake study will be conducted at concentrations lower than 7 ppm."
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            "content": "The first in a new series of experiments testing the effects of meta-xylene on northern anchovy embryos and larvae was initiated. Pre-gastrulated embryos were exposed to three initial concentrations of meta-xylene (5, 10, 20 ppm) for 24 hours. Results of exposure of pre-gastrulated embryos will be compared with those from exposure after gastrulation in an attempt to determine whether the change in membrane permeability with gastrulation is correlated with differences in hatch and survival of embryos."
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            "content": "10"
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            ],
            "content": "Analyses of data on the effects of benzene on juvenile striped bass, steelhead trout, and adult herring have been completed. A manuscript is in preparation."
        },
        {
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            "content": "STOCK ASSESSMENT AND FISHERY EVALUATION INVESTIGATIONS"
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            "content": "Report on Results of CF&G/NMFS Cooperative Study on Stock Assessment of Southern California Recreational and Commercial Fisheries Presented to State-Federal Steering Committee"
        },
        {
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            ],
            "content": "Mr. Alec MacCall, Fishery Biologist, California Department of Fish and Game and Dr. Gary Stauffer of the La Jolla Laboratory, presented the results from the \"Report on CF&G/NMFS Cooperative Stock Assessment, Fishery Evaluation, and Fishery Management of Southern California Recre- ational and Commercial Fisheries,\" to members of the State-Federal Steering Committee and fishery biologists from CF&G and the Southwest Fisheries Center on August 8 at the Center. Mr. Robert Ayres, coordinator of game fish programs from NMFS, Washington, also attended. Comments and sugges- tions on the report were solicited."
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            "content": "A second presentation of this report embodying suggestions and modifica- tions received at the earlier meeting is now scheduled for September 10 at the California Department of Fish and Game Laboratory in Long Beach. The Steering Committee plans a meeting in early October to recommend specific tasks for. the CF&G/NMFS cooperative project for the coming year. Chaired by Mr. John Radovich of CF&G, the Steering Committee also includes Messrs. Gerald Howard, Norm Abramson, and Brian Rothschild of NMFS and Messrs. R. Kaneen and E. Greenhood of CF&G."
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            "content": "Mr. Bruce Wahlen, Mathematics Technician at the La Jolla Laboratory, com- pleted the figures for a manuscript using computer graphics on ex-vessel prices of commercial fish in southern California. The manuscript, intended for the Marine Fisheries Review, will document the 1941-72 time series of commercial catches, ex-vessel price and prices adjusted by wholesale price index, reflecting the economics of commercial fisheries in this area."
        },
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            "content": "SWFC'S World Tuna System Study Completed"
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            "content": "An analysis of tuna fishing problems, from both a U.S. and world view, was begun at the SWFC in order to clarify existing problems, to decide what could be done about them, and to determine what criteria should be applied in evaluating the wide range of suggested solutions. Included in the study is an examination of the dynamics of three major surface tuna fisheries, those in the IATTC regulatory area (CYRA), west of the"
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            "content": "11"
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            "content": "CYRA, and in the eastern tropical Atlantic. With the help of Dr. Brian Mar, Professor of Civil Engineering at the University of Washington, a prototype computer model was constructed and utilized to evaluate some potential management problems in terms of the economics of the U.S. fishing fleet. The results of the dynamic modeling effort as well as a dicussion of the tuna problems, solutions, criteria, and research needs are included in the report \"Systems Analysis of the U.S. and World Tuna Management Prob- lems with Some Recommendations for the NMFS Program.\""
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            ],
            "content": "Organized by Dr. William Fox, SAFE Investigation Leader at the La Jolla Laboratory and Mr. David Mackett, SWFC Planning Officer, the study began on July 9 and 10 with a meeting of industry, government, IATTC and inde- pendent experts. The work continued throughout the remainder of July and well into August. Much of the modeling work, and the final draft report were completed by Mr. Daniel Huppert, Industry Economist, with the help of Mr. K. Brennecke, Mathematical Technician."
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            "content": "SAFE Staff Prepares Working Paper for European Tuna Meetings"
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            "content": "The staff of the SAFE Investigations, headed by Dr. William Fox, has been devoting its efforts almost exclusively to producing working papers and documents in connection with the forthcoming series of meetings scheduled in Nantes, France and Copenhagen, Denmark in September 1974 on matters dealing with U.S. membership in the International Commission for the Con- servation of Atlantic Tunas, the Atlantic bluefin fishery, and with tuna stock assessment on a worldwide basis."
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            ],
            "content": "Dr. Fox prepared a working document entitled, \"An overview of production modeling\" for presentation to the ICCAT Workshop on the Population Dynamics of Tuna,\" to be held at Nantes, France, September 2-13. Dr. Rothschild has written a draft working paper entitled, \"Issues in population dynamics of tunas\" for this same meeting. This meeting will be in two sessions -- the first, with a selected group of eight specialists in the field of population dynamics to consider present and future studies in the field. and the second meeting, with tuna researchers from various countries to whom the results of the first session's deliberations will be presented. Dr. Rothschild, as Chairman of the ICCAT Standing Committee on Research and Statistics (SCRS) is Convenor of the Workshop, and Dr. Fox is a member of the selected group of specialists."
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            "content": "Following the Workshop, FAO will be holding a meeting of the Indian Ocean Fishery Commission/Indo-Pacific Fisheries Council Ad Hoc Working Party of Scientists on Stock Assessment of Tuna, also in Nantes. Drs. Rothschild and Fox are members of the Working Party."
        },
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            ],
            "content": "Dr .. W. Lenarz, Fishery Biologist and Mr. J. Zweifel, Mathematician, with considerable assistance from Mr. A. Coan, Mathematician, all of the La Jolla Laboratory, completed a manuscript entitled, \"A theoretical examination"
        },
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            "content": "12"
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            "content": "of some aspects of the interaction between longline and surface fisheries for tunas.\" This paper will be presented to the IOFC-IPFC meeting at Nantes by Center Director Brian Rothschild."
        },
        {
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            "content": "As recommended at the last ICCAT/SCRS meeting, a joint meeting of ICCAT and ICES bluefin tuna working groups will be held in Copenhagen on September 29, preliminary to the 62nd ICES meeting there September 30- October 10. Dr. Fox, as an expert on U.S. bluefin tuna research, will participate in this joint meeting. Dr. Fox will present a paper by Dr. Gary Sakagawa, Fishery Biologist at the La Jolla Laboratory, entitled, \"The purse seine fishery for bluefin tuna in the northeastern Atlantic Ocean.\" Dr. Fox is also collaborating with Dr. Grant Beardsley of the NMFS Southeast Fisheries Center, Miami on a working document on the status of Atlantic bluefin."
        },
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            "content": "Drs. Rothschild and Fox also plan to consult and visit with fellow re- searchers in the tuna and population dynamics fields in government fisheries research laboratories in France and at FAO in Rome."
        },
        {
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            "content": "Messrs. Lenarz, Coan and Zavala-Camin, visiting researcher from Brazil, completed most of a cohort and production model analysis for North Atlantic albacore. A manuscript is being prepared for presentation to the ICCAT meeting in Madrid, Spain, slated for November 1974."
        },
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            ],
            "content": "Mr. Luis Zavala-Camin, scientific researcher on a training mission from the Instituto de Pesca, Santos, Brazil, has completed his assignment at the La Jolla Laboratory. During his stay here he compiled and analyzed data from a tuna longline fishery of southern Brazil under the guidance of Dr. Gary Sakagawa, Fishery Biologist. He plans to submit his study of the fishery as a working document to ICCAT in November. He also re- ceived instructions on the basic techniques of stock assessment from Dr. William Lenarz. To gain practical experience he worked on a stock assess- ment of North Atlantic albacore with Dr. Lenarz and Mr. Coan. Mr. Zavala will spend most of September at the SWFC's Honolulu Laboratory to observe experimental work being conducted on tunas. He will then return to Cali- fornia to attend the Tuna Conference at Lake Arrowhead in early October before returning to Santos."
        },
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            "content": "National Weather Service Becomes Full-Time Participant in NMFS FAX Advisory Program"
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            "content": "Mr. L. Eber, Fishing Information Systems Task Leader, reports that the National Weather Service (NWS) became a full-time participant in the NMFS radio facsimile (FAX) advisory program in August 1974, pursuant to agree- ments reached earlier between the respective directors of NMFS and NWS. To implement NWS participation, a data line was established between the"
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            "content": "13"
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            "content": "NWS Forecast Office, Redwood City and SWFC, La Jolla, with a drop to NMFS-licensed radio station WWD also in La Jolla. The line is used for transmission of wind and weather, and sea state forecast charts prepared by NWS. For several weeks the NWS charts were broadcast from WWD to the tropical tuna fishing fleet on weekends, to fill a gap in the SWFC trans- missions. During this period, the NWS charts were recorded at SWFC for evaluation of format compatibility and of depiction of significant forecast elements such as incipient tropical storms and the intertropical convergence zone."
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            "content": "Beginning in August, the NWS FAX charts have been broadcast from WWD daily. Surveillance of wind, weather and sea conditions in the eastern tropical Pacific has been continued by SWFC personnel, however, because of SWFC interest in maintaining a high level of cooperation from tuna fishermen in observing and reporting environmental data in exchange for the advisory services. The surveillance enables SWFC to supplement the FAX charts with verbal advisories when appropriate and to respond to direct requests from tuna vessels for information in specific situations."
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            "content": "SWFC environmental scientists will continue to prepare and broadcast weekly FAX charts of sea surface temperature and mixed layer depth. These charts provide environmental information to the tuna fisherman on an experimental basis, to enlist his participation in developing the potential application of such information to fishing strategy."
        },
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            "content": "STOCK AND RECRUITMENT INVESTIGATIONS"
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            "content": "Recipient of National Research Council Research Associateship to Study Schooling Behavior of Squid at La Jolla Laboratory"
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            "content": "Dr. Ann Hurley, Animal Behaviorist, is the latest recipient at the La Jolla Laboratory of a National Research Council Senior Research Associateship, awarded by NOAA and NMFS. During her 12-month stay at the laboratory, Dr. Hurley plans to examine the importance of various types of visual stimuli on the schooling of squid (Loligo opalescens) and will attempt to examine the development of schooling behavior using the facilities of the La Jolla Laboratory's salt water aquarium where squid can be main- tained. The Research Associateship at the Center provides an opportunity for post-graduate scientists to work on basic research problems with pro- fessional staff at the Laboratory."
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                }
            ],
            "content": "According to Dr. Hurley the squid is important in the pelagic food web off the California coast. It is a predator on many species of small fish and crustaceans and is itself a food item in the diet of larger fish and marine mammals, and increasingly serves as an abundant and nutritious protein source for man. The squid forms large schools in open water and migrates to shallow water to spawn, often in the vicinity of the laboratory."
        },
        {
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            "content": "14"
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            "content": "There is a small commercial fishery for squid in California and most fishery biologists agree that it is presently an underutilized fisheries resource."
        },
        {
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            "content": "The mechanisms which cause squid to form large schools and to maintain their orientation within a school have not been studied in squid, Dr. Hurley said. She thinks that vision probably provides the primary sensory input for school- ing behavior and also appears to be important in other social interactions. She also noted that the survival value of schooling in fish has been con- sidered but its use to squid or other pelagic invertebrates is unknown. Schooling in squid may be important as a mechanism to escape predators, or its main function may be to form breeding groups which migrate inshore to spawn. Dr. Hurley hopes that her work on comparisons of schooling in fish and squid may give clues to physiological mechanisms involved in schooling and the ecological importance of schooling to both groups of animals."
        },
        {
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            ],
            "content": "The first woman to receive a National Research Council Fellowship at the La Jolla Laboratory, Dr. Hurley, 28, is a graduate of Stanford University and received her Ph.D in biological oceanography from the University of California, San Diego in 1972. Recently, Dr. Hurley held a position as a post-graduate research neuroscientist at the University of California, San Diego where she conducted experiments to determine the feasibility of experiments on squid both on board ship and in the laboratory at the Scripps Institution of Oceanography. She has examined the mating behavior of Loligo while on a 3-week cruise aboard the University of California research vessel, Alpha Helix, and has also observed spawning squid during scuba dives."
        },
        {
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            ],
            "content": "This month, Dr. Hurley completed arrangement of an experimental setup in .. the SWFC aquarium for studying schooling behavior. This includes a large circular holding tank and a 6 x 8 m rectangular tank in which the squid can be photographed with a 35 mm camera with motor drive. She has also completed the writing of computer programs for analysis of schools of two, three, or six squid."
        },
        {
            "spans": [
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            "content": "Northern Anchovy Successfully Reared Through Metamorphosis on Laboratory-Cultured Foods"
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        {
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            ],
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            ],
            "content": "The growth rate of northern anchovy is an essential element in any model designed to interpret year class success or estimate larval survival. The difficulty in obtaining information on growth rates has always been that it has not been possible to rear these fishes through metamorphosis in a controlled laboratory environment with known kinds and quantities of food. This month, Fishery Biologist John Hunter, assisted by Biological Technician C. Sanchez, at the La Jolla Laboratory, report that they have successfully reared northern anchovy (Engraulis mordax) from the egg through metamorphosis on a diet composed entirely of laboratory-cultured foods, culminating a series of rearing studies at the La Jolla Laboratory designed to develop culture procedures for rearing anchovy larvae. In the past anchovy could not be reared past about 20 days on cultured foods."
        },
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            "content": "15"
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            ],
            "content": "In 1970 Kramer and Zweifel recorded the growth of anchovy larvae at 17 and 22°℃ for periods up to 35 days, at which time the larvae reached an average length of 17 mm. In their experiments larvae did not reach metamorphosis which occurs at about 35 mm. The larvae were fed wild plankton supplemented by brine shrimp napulii (Artemia salina). In the ensuing years culture techniques using laboratory-cultured foods for larval anchovy gradually developed: The dinoflagellate, Gymnodinium splendens for the first 5 days (Lasker, et al.); the harpacticoid copepod, Brachionus plicatilus (Theilacker and McMaster), to about 20 days during which time the fish grew to about 10 mm. During the last year, Dr. Hunter and Ms. Sanchez were successful in culturing the copepod, Tisbe furcata, which supplied the missing link, that is, provided a food other than Artemia for larvae older than 20 days (greater than 10 mm). In all previous attempts larvae gradually died when fed Artemia (the so-called \"Artemia syndrome\"), and what remained to be done was to find a cultured food that could be used for larvae larger than 10 mm."
        },
        {
            "spans": [
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            ],
            "content": "Foods used by Dr. Hunter in rearing included Gymnodinium, Brachionus, Tisbe and Artemia. Metamorphosis occurred 72 days after hatching at a rearing temperature of 16℃. Fifteen larvae were removed every other day during the rearing period to measure the growth rate and these data will be used in various mathematical models under development at the Center. No previous growth data existed for anchovy reared to metamorphosis under known environmental conditions. Of the 3,000 eggs originally stocked in the tank, 13% survived to metamorphosis."
        },
        {
            "spans": [
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            ],
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            ],
            "content": "Dr. Ahlstrom, Senior Scientist at the La Jolla Laboratory, reports that projects continued on working up life history series for the Handbook on Fish Larvae of the California Current. One of the workers on this project, Ms. April McLean, will be terminated owing to reduced funding of the Smithsonian contract. Ms. McLean has been preparing meristic and morpho- metric tables on bothid flatfish larvae, presently Syacium ovale."
        },
        {
            "spans": [
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            ],
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            ],
            "content": "The manuscript by Ms. Elizabeth Stevens, Biological Technician and Dr. Ahlstrom, dealing with neuston (surface) collections made on extended David Starr Jordan cruise 7205, will not be submitted to the International Council for the Exploration of the Sea as originally planned, but will be prepared for presentation at the California Cooperative Oceanic Fisheries Conference instead."
        },
        {
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            ],
            "content": "Dr. H. Geoffrey Moser, Fishery Biologist at the La Jolla Laboratory, reports that progress continues on the guide to the identification of eastern Pacific scorpaenid larvae. The section of Ectreposebastes and Scorpaenodes was completed and the section on the genus Scorpaena is presently being prepared. Scorpaena guttata is a high quality food fish in the San Diego"
        },
        {
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            ],
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            "content": "16"
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        {
            "spans": [
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            ],
            "boundingRegions": [
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            ],
            "content": "area and the larvae occur in nearshore plankton tows off southern California and Baja California. The illustrations of the larvae of S. guttata are com- pleted and the descriptions are near completion. Larvae of another species of this genus, S. sonorae, will also be described in this paper; the illus- trations have already been completed. The only remaining genus to be described , for the identification guide is Pontinus."
        },
        {
            "spans": [
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            ],
            "content": "Work on the trawl collections resulting from the cooperative project with Dr. C. Matthews of the University of Baja California continued during the month of August. Summer students Elaine Carlin and Jack Christian sorted, identified and took basic meristics of fishes representing almost half of the collection made by Dr. Moser during the Februrary expedition to Magdalena Bay."
        },
        {
            "spans": [
                {
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            ],
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            ],
            "content": "Mr. K. Lal, California Department of Fish and Game Biologist is working with Dr. Lasker at the La Jolla Laboratory to induce spawning and captivity of striped bass held in seawater. The experiment on rearing of striped bass larvae in increasing salinities was terminated after 40 days. During this period, 1-day old larvae hatched in fresh water were passed through a salinity gradient, until they reached 100% seawater, when 33 days old. The larvae survived well in 60% seawater, but after acclimation to 80% seawater, when 29 days old, mortality shot up for some unknown reason."
        },
        {
            "spans": [
                {
                    "offset": 43807,
                    "length": 352
                }
            ],
            "boundingRegions": [
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            ],
            "content": "Adult striped bass were continued to be held in four experimental tanks in seawater under constant temperature (19°℃) and photoperiod (15L:9D). Biopsy showed that the females found in tank I with mature eggs above 0.5 mm diameter in July 1974, had regressed instead of developing further. The number of ripe males in tank IV also decreased from 9 to 3."
        },
        {
            "spans": [
                {
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                    "length": 378
                }
            ],
            "boundingRegions": [
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            ],
            "content": "Further observations on the effect of red light were discontinued. The light intensity in all the tanks was reverted to 60 watts daylight and 12 watts night light. The length and weight of all fish was recorded. Five fish with stunted growth and 14 fish with sex yet undetermined were removed from the experimental tanks and the remaining tagged fish were regrouped as follows :"
        },
        {
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            "content": "Tanks"
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            "content": "I"
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            "content": "II"
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            "content": "III"
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            "content": "IV"
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            "content": "Total"
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            ],
            "content": "Remarks"
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            ],
            "content": "No. of males"
        },
        {
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            "content": "10"
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            "content": "10"
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            "content": "10"
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            "content": "2*"
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            "content": "32"
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            "content": "*2 lost tag"
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            "content": "No. of females (mature)"
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            "content": "8"
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            "content": "4*3*"
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            "content": "31"
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            "content": "*3 lost tag"
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            "content": "No. of females ( immature)"
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            "spans": [
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                    "offset": 44688,
                    "length": 1
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            "content": "3"
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                    "length": 1
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            "content": "3"
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            ],
            "content": "18+4*"
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            "content": "31"
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            "content": "*4 lost tag"
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            "content": "Total"
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            "content": "21"
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            "content": "31"
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            "content": "94"
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            "content": "17"
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            "content": "Discussions were held with Dr. Lasker regarding experimental work for the year 1974-75. A new experiment was launched on August 24, 1974 which has the objective to achieve maturation and spawning of striped bass out of season and before the end of 1974."
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            ],
            "content": "SURVEY SYSTEMS ANALYSIS INVESTIGATIONS"
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        {
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            "content": "Scientists on Jordan to \"Calibrate\" Acoustic System for Biomass Assessment"
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            ],
            "content": "On August 19, the NOAA research vessel, David Starr Jordan, left San Diego to work for 4 weeks in the Los Angeles Bight with two wetfish purse seiners, the Southern Explorer and Rigel, under contract to NMFS, and with an air- plane spotter. Cruise Leader is Lt. R. Hewitt of the NOAA Corps, on detail to the La Jolla Laboratory. Purpose of the cruise is to \"calibrate\" the acoustic system aboard the Jordan which has the capability to count and measure anchovy fish schools and determine their target strength. When fish schools are located by the plane, the Jordan locates them with its sonar and the purse seiner moves in to capture the same school, to confirm the sonar measurements. The California Fish and Game research vessel, Alaska, also equipped with calibrated sonar and sounder is collaborating in the project. The unique experiment, sanctioned by the California Fish and Game Commission, permits the taking of 2,500 tons of anchovies outside the regular commercial fishing season."
        },
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            ],
            "content": "Reports from Lt. Hewitt indicated that during the first half of the sonar mapping experiment, 48 purse seine resulted in the capture of 1,220 tons of anchovy previously measured automatically by the mini-computer aboard the Jordan. The purse seine effort has been allocated to nine categories, three each for fish school physical size in the horizontal plane and apparent compaction and thickness of the schools in the vertical plane. The fish schools landed thus far fill two of the nine categories in the larger school, compact portion of the matrix. No comparison has yet been made of the computer-derived index of school biomass and biomass estimated by the purse seine skipper."
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            ],
            "content": "The joint operation with the chartered seiners should provide a firm base of information correlating target strength with school compaction. This information will be used for conducting the first automated hydroacoustic survey in the Los Angeles Bight, with anchovy as the target species, during the last 2 weeks of the cruise."
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            "content": "Manual of Methods for Pelagic Fish Egg and Larva Surveys Nears Completion"
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            "content": "A final 350-page draft of a manual of methods titled, \"Standard Techniques for Pelagic Fish Egg and Larva Surveys,\" edited by Dr. Paul Smith, Leader of the Survey Systems Analysis Investigation at the La Jolla Laboratory, has been completed under contract with the Food and Agriculture Organization"
        },
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            ],
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            "content": "18"
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            "content": "in Rome. It is being circulated to 35 specialists and students for final comments before being sent to FAO in Rome for publication. Dr. Smith has edited previous contributions to an earlier edition of this manual and has now added illustrations and examples to aid specialists in developing this technique in other countries."
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            "content": "The text of the manual, based on materials presented during a training course on larval fish at the La Jolla Laboratory last year, includes two sections: one on the practical aspects of conducting an egg and larva survey and one on the theoretical basis for interpreting the survey data. The recommendations include use of a simple bongo net in a slow, oblique tow for optimum economy of operation and capture and retention of fish larvae."
        },
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            "content": "A bibliography of surveys and larva and larva identification has been assembled by Dr. Elda Fagetti of FAO and Dr. Elbert Ahlstrom, Senior Scientists at the La Jolla Laboratory and included as part of the manual. The bibliography has been indexed to taxonomic groups and geographic regions."
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            "content": "Progress of Survey Systems Analysis Investigation Reviewed"
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            "content": "Progress made by the staff on the Survey Systems Analysis Investigation at the La Jolla Laboratory in preparing the review of the California Cooperative Oceanic Fisheries Investigation was reviewed by Center Director Rothschild and interested investigation leaders at the La Jolla Laboratory on August 14. Drs. P. Smith, R. Owen, and A. Alvarino, and Mr. D. Kramer, provided a synopsis of activities in the review process and Lt. R. Hewitt, NOAA officer detailed to the La Jolla Laboratory, reviewed the status of the data compilation schedule. Action was suggested in several areas: increased emphasis on the 25-year CalCOFI time series; revision and publication of the resume of CalCOFI; and preparation of draft publication forms at the completion of individual projects."
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            "content": "TUNA ASSESSMENT AND DEVELOPMENT INVESTIGATIONS"
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            "content": "Anchovy From Fourth Shipment Reach Hawaii in Excellent Condition; Tanker Modification and Bait Density Studies Underway"
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        {
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            ],
            "content": "The Honolulu Laboratory continues in its efforts to determine a means of providing a suitable skipjack tuna baitfish for the fisheries of the central and western Pacific Ocean."
        },
        {
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            ],
            "content": "After three shipments of northern anchovy were made via experimental trans- port tank from Long Beach, California to Honolulu -- each characterized by high bait mortality -- a bait aging facility was set up in the Long Beach Harbor area in July. For the fourth shipment begun August 7, the facility"
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            "content": "19"
        },
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            "content": "made available about 2,000 pounds of strong, healthy fish. Of the 224 scoops of fish placed in the transport tank, 17 were weighed and the calculated total weight estimated at 1,317 pounds of anchovy. Prior to sailing it was noticed that live fish were being picked up in the after water outlet, the result of a greatly increased pressure head created by the angle of the tanker aboard the Matsonia."
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            "content": "At the completion of the unmonitored voyage to Honolulu, a conservatively estimated 410 pounds of anchovy in excellent condition were removed from the tanker and placed in holding tanks at Kewalo Basin. Less than 30 pounds of dead fish, well decomposed, were in the bottom of the tank, indicating slight mortality during the trip. It is estimated from these known amounts that at least 800 pounds of anchovy were lost overboard during the shipment, probably having been expelled through the water outlet. It seems likely that most of the lost fish were alive."
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            ],
            "content": "Four skipjack tuna fishing vessels in Honolulu expressed interest in buying the anchovy at $2.00 per pound. Those selected, by drawing, expressed reservation at the suitability of the large anchovy for fishing the small- and medium-sized skipjack tuna presently in the Hawaiian area."
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            "content": "The tanker was returned to Long Beach, where modifications are underway to obviate the loss of live fishes. Bait density tests are also being conducted at Long Beach by Roger Green, Leader, Baitfish Project, and Fishery Methods and Equipment Specialist Don Aasted."
        },
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            "content": "Manuscript Revision and Report Writing Occupy Scientists of Fishery Analysis Program"
        },
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            "content": "A major emphasis of the Fishery Analysis Program of the Honolulu Laboratory under the leadership of Dr. Robert Skillman, Fishery Biologist, is on stock assessment in the Pacific and Indian Oceans. During the month of August progress in the assessment of skipjack tuna resources and assessment of other tuna and tunalike resources took the form of manuscript revision and report writing. Mr. Richard Uchida, Fishery Biologist, continued to make minor revisions of his manuscript \"Reevaluation of fishing effort and apparent abundance in the Hawaiian skipjack tuna, Katsuwonus pelamis, fishery, 1948-70.\" and also of the draft of a working paper \"Recent de- velopments in fisheries for skipjack tuna, Katsuwonus pelamis, in the central and western Pacific and Indian Oceans.\" This working paper was prepared for the IOFC/IPFC Tuna Working Party at the request of J.A. Gulland, FAO Fishery Resources Divison. Mr. Uchida spent the remainder of the month compiling and summarizing tuna catch data from the Pacific Ocean for 1960-72 and preparing a short report describing recent developments in fisheries for skipjack tuna."
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            "content": "20"
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            ],
            "content": "Dr. Skillman revised the manuscript \"An assessment of the South Pacific albacore, Thunnus alalunga, fishery, 1953-72\" following outside review. It has been forwarded to the Director, SWFC, for permission to publish in the Marine Fisheries Review."
        },
        {
            "spans": [
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            ],
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            ],
            "content": "Hawaii's 1974 Skipjack Tuna Catch Continues Well Below Average"
        },
        {
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            "content": "From January through August 1974 the skipjack tuna fishery in Hawaii produced an undistinguished estimated catch of 2,489 metric tons. This figure is 1,349 metric tons below last year's catch for the same period and 980 metric tons below the average for 1948-73. In the month of August alone the catch reached an estimated 380 metric tons, which was 344 metric tons below the catch in August 1973 and 349 metric tons less than the long- term August average."
        },
        {
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            ],
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            ],
            "content": "Pulou Niuatoa, Government of American Samoa employee, recorded the lengths of 1,967 albacore from 42 vessels during the period July 26 to August 23. He collected 33 sets of catch and effort data. Utilizing the data from 10 vessels only, an average size of 89.0 cm was determined and an albacore catch per 100 hooks of 3.13."
        },
        {
            "spans": [
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            ],
            "content": "PROJECT PROPOSAL DEVELOPED FOR BUREAU OF LAND MANAGEMENT ENVIRONMENTAL STUDY"
        },
        {
            "spans": [
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            ],
            "content": "In response to the needs of the Department of the Interior's Bureau of Land Management for environmental information on the impact of possible offshore oil and gas development in the area of the southern California Bight, a team headed by Mr. David Mackett, SWFC Planning Officer, is writing a comprehensive plan for environmental monitoring and baseline studies in this area. According to Mr. Mackett, this study will provide the mechanisms to assist BLM in answering the \"what if\" questions, i.e., What would happen if an oil spill occurred in any particular area? and What are the likely effects on the fish life, recreational fishing and commercial fishing, etc., in the ocean environment?"
        },
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            ],
            "content": "In preparation for writing the proposal a SWFC contingent which included Drs. Rothschild, R. Lasker, E. Ahlstrom, R. Owen, and Messrs. N. Abramson and Mackett met in Boulder, Colorado, August 5-9 with BLM and Environmental Research Laboratory staff to discuss ways of designing baseline and monitor- ing studies for the Los Angeles Bight. During the week-long stay in Boulder, a draft plan was put together which consists of two phases. The first phase of approximately 15 months duration would result in a general decision framework for evaluating the environmental issues about oil development in the southern California area; preparation and establishment of environmental baselines from existing data; and the collection of selected environmental data on important variables for which data are now lacking."
        },
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            "content": "21"
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            "content": "The second phase would consist of further data collection, the conduct of experiments, and analysis that will be required to increase the accuracy or precision of the information required for making better decisions re- garding the impacts of oil and gas development on the environment."
        },
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            "content": "On August 21-23, Mr. Mackett and Dr. Ahlstrom flew to Washington, D.C. to review the finished plan with Mr. David Wallace, Associate Administrator for Marine Resources, and other NOAA and NMFS officials. It was recommended by the reviewing officials that the proposal be rewritten to conform in format to other NOAA proposals to BLM. Other elements in NOAA -- Environ- mental Research Laboratory, National Ocean Survey, as well as other lab- oratories in NMFS, are working cooperatively on proposals to BLM for other offshore continental areas, and September 25 has been set for presentation of the formal NOAA plan to BLM."
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            ],
            "content": "PUBLIC AFFAIRS"
        },
        {
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                    "length": 714
                }
            ],
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                }
            ],
            "content": "Fishery Biologists Paul Smith and David Kramer will represent the National Marine Fisheries Service's La Jolla Laboratory in the 1974-75 \"Meet the Scientist\" lecture program, sponsored by the Greater San Diego Industry Education Council of the County Department of Education. Dr. Smith who has agreed to speak to students at the senior high and community college level has selected, \"Fisheries and Fishery Research in the California Current\" as his topic. Mr. Kramer will discuss \"Current trends in fishery research\" at community colleges during the coming school year. This is the 3rd year of NMFS participation in the program to acquaint students with scientific research being carried out in the San Diego area."
        },
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            ],
            "content": "SEMINARS"
        },
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                    "length": 204
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            ],
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            ],
            "content": "August 1 Dr. Maynard A. Steinberg, Director of the NMFS Pacific Utilization Research Center in Seattle, gave an informal talk to the staff at the Honolulu Laboratory on the activities of his organization."
        },
        {
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            ],
            "content": "MEETINGS AND TRAVEL"
        },
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            ],
            "content": "July 28- August 1"
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            ],
            "content": "Dr. E. Hobson, of the Tiburon Laboratory, attended a Shark Behavior Workshop convened by ONR and NSF at Monterey, California."
        },
        {
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            ],
            "content": "August 1 Mr. R. Shomura, Director of Honolulu Laboratory, attended a meeting called by the Hawaii Department of Land and Natural Resources to discuss the proposed Wilderness Area for the Northwest Hawaiian Islands, also known as the Leeward Hawaiian Islands. The boundary of the Wilderness Area is the key point of dispute between the State of Hawaii and the Department of the Interior."
        },
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            "content": "22"
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            ],
            "content": "August 3 Mr. Maxwell Eldridge, Fishery Biologist, attended a meeting at Mill Valley, California of the North Central Coastal Commission which was concerned with developing policies towards coordinating coastal research and managing and protecting areas of ecological importance."
        },
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            "content": "6"
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            ],
            "content": "- Mr. Charles Dana Gibson of New York visited the Honolulu Laboratory to discuss with Dr. Barkley the possibility of bringing his vessel to Hawaii to enter the snapper or shrimp fishery."
        },
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            ],
            "content": "9 Mr. Maxwell Eldridge visited the Pacific Gas and Electric - Company Engineering Research Facility in Danville, Cali- fornia. The purpose of the visit was to observe methods and equipment in use at that facility for the measurement of ATP in plankton."
        },
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            ],
            "content": "13 Mr. David Mackett, SWFC Planning Officer, was in Menlo Park, California to confer with U.S. Geological Survey staff."
        },
        {
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            ],
            "content": "Discussions concerning the Pacific Tuna Development Foundation (PTDF) program in the central and western Pacific attended by Dr. Rothschild, Mr. Barrett, W. Van Campen, Gerald Howard and Messrs. G. Broadhead and F. Alverson of LMR."
        },
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            ],
            "content": "13 and 30 13 Lt. Roger Hewitt, Charles Hill, Chief, Support Services at the La Jolla Laboratory, and Captain Charles Forster of the Jordan were in Los Angeles to negotiate and sign contracts for two wetfish purse seiners to work with the Jordan collecting anchovies to confirm sonar measurements."
        },
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            "content": "13-16 -"
        },
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            ],
            "content": "SWFC Executive Officer Ben Remington traveled to Boulder, Colorado, to participate in Management by Objective dis- cussions with NOAA and NMFS officials."
        },
        {
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                    "offset": 59358,
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            ],
            "content": "20-21 - Mr. J.F.T. Saur, Oceanographer at the La Jolla Laboratory, attended the conference of NORPAX (North Pacific Experi- ment) Co-principal Investigators which was hosted by the Fleet Numerical Weather Central at Monterey, California. The conference comprised the annual site review of some 35 projects within NORPAX by the two sponsoring agencies, Office of Naval Research and National Science Foundation/ International Decade of Ocean Exploration. Dr. Douglas R. Mclain, NMFS Pacific Environmental Group, Monterey, and Mr. Saur made a presentation on progress and plans for the NMFS project, \"Ships of opportunity: time series XBT sections in the equatorial and North Pacific Ocean.\""
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            "content": "23"
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            ],
            "content": "August 29 Dr. John Bardach, Director, Hawaii Institute of Marine Biology, met with Mr. Shomura to discuss fisheries problems of the State."
        },
        {
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            ],
            "content": "30 Dr. John J. Magnuson, University of Wisconsin, discussed with Mr. Shomura some physiology and behavior research projects."
        },
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            ],
            "content": "VISITORS"
        },
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            "content": "Honolulu Laboratory"
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            ],
            "content": "August 1 - Dr. Harold Rosenthal, Biologist, West Germany."
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            ],
            "content": "15-23 - Mr. Naomi Yoshikawa, Managing Director (Planning and Production), Japan Marine Products Photo Materials Association, Tokyo."
        },
        {
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                    "offset": 60533,
                    "length": 95
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            ],
            "content": "26 Mr. Matthew Chun, Office of Hawaii State Gubernatorial - Candidate Thomas P. Gill, Honolulu."
        },
        {
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                {
                    "offset": 60629,
                    "length": 79
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            ],
            "content": "28 Mr. Theodore A. Morgado, Docksite Manager, Star-Kist Foods, Inc., Pago Pago."
        },
        {
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                    "offset": 60709,
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            ],
            "content": "29 Dr. Gary T. Sakagawa, Fishery Biologist, SWFC, - La Jolla."
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            ],
            "content": "30 Mr. T. Yamamoto, FAO Fishery Statistician, UNDP/FAO Fisheries Development and Management Project, Jakarta."
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        {
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            "content": "La Jolla Laboratory"
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            "content": "August 6 Mr. Robert J. Ayers, NMFS, Washington, D.C."
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            "content": "7-9 Mr. M'nachem Ben Yami, Department of Fisheries, Haifa, - Israel."
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            "content": "8 Mr. J.M. Gates, University of Rhode Island, Kingston, - Rhode Island."
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            "content": "- Mr. Norm Abramson, SWFC's Tiburon Laboratory."
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            "content": "13 Mr. Gerald Howard, NMFS Regional Office, Terminal - Island, California."
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            "content": "24"
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            "content": "August 15 - Mr. Amin Zarur, Chief, Fisheries Office, Mexican Fish Commission"
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            "content": "21"
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            "content": "- Messrs. Herb Hyatt and Robert Gillard, Bureau of Land Management, Los Angeles"
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            "content": "26 Mr. James Johnson, Pacific Environmental Group, Monterey -"
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            "content": "28"
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            "content": "- Drs. Victor N. Maximov, Moscow University, Ivan B. Tokin, University of Marine Biology, Murmansk, and Gennadii Polikarpov, Institute of Biology of South Seas, Sebastopol, U.S.S.R."
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            "content": "- Mr. William L. Templeton, Battelle Northwest, Richland, Washington"
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            "content": "- Mr. Michael J. Wade, U.S. Environmental Protection Agency, Narragansett, Rhode Island."
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            "content": "Tiburon Laboratory"
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            "content": "August 2"
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            "content": "- Edwin Osada, Moss Landing Marine Laboratory, Moss Landing."
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            "content": "16 - Paul Siri, TYEE Club, Atherton, California."
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            "content": "- Robert L. Fichtner, Ultrachem, Walnut Creek, California."
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            "content": "- William G. Wilson, Ultrachem, Walnut Creek, California."
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            "content": "- Akira Harada, Ultrachem, Walnut Creek, California."
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            ],
            "content": "Dr. Frank Hester, Frank Hester Associates, Santa Barbara, California."
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            "content": "19"
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            ],
            "content": "- John Padan, PMEL/NOAA, Seattle, Washington."
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            "content": "27"
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            "content": "- P. Maddox, Marine Science Institute, Dana Point, California."
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            "content": "30"
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            "content": "- Roger Green, NMFS, Honolulu, Hawaii."
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            "content": "PERSONNEL ACTIONS"
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            "content": "August 1"
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            "content": "Cuthbert Love, Oceanographer - Termination of Temporary Appointment"
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            "content": "La Jolla"
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            "content": "- Eugene Burke, Janitor - Promotion Tiburon"
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            "content": "August 8"
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            "content": "- Frances Chew, Clerk-Typist - Transfer to Veteran's Administration"
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            "content": "- Melchor Fernandez, Biological Aid - Temporary Appointment"
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            "content": "13 Mary Beyer, Clerk-Steno - Temporary - Appointment"
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            "content": "19 Rose Smith, Summer Aid - Termination of Temporary Appointment"
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            "content": "30 - Bruce Wahlen, Mathematical Technician, Pay Adjustment to Part-Time"
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            "content": "TRAINING"
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