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  • 1
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    Cruise Report 71-KB-5: Pelagic Fish Program (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/562 | 8 | 2011-09-29 21:53:22 | 562 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-30
    Description: (1p.)
    Keywords: Fisheries ; Biology ; R/V Kelp Bass ; San Pedro Bay ; sardine ; Engraulis spp. ; spawning
    Repository Name: AquaDocs
    Type: monograph
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  • 2
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    Dungeness crab research program: Report for the year 1975 (2021)
    California Department of Fish and Game, Marine Resources Region | Eureka, CA
    In:  http://aquaticcommons.org/id/eprint/89 | 8 | 2011-09-29 22:36:15 | 89 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: The progress of the research program in the year 1975 is presented. In addition to a report of project studies, discussions of program development, research procedures, and cooperative research efforts are included. The crab critical stage project studies included distribution and relative abundance of larvae and juvenile crabs in the Gulf of the Farallones, San Pablo Bay and San Francisco Bay. Several fish species were identified as crab predators, genetic structure of Dungeness crab populationswere investigated, and growth rates of juvenile crabs were determined. The crab environment project collected historical and recent data on parameters of oceanographic factors including temperatures, salinities, currents, upwelling, sea level, and river flows into the bays and ocean. Environmental toxicant levels in crabs are being determined for a wide spectrum of heavy metals, pesticides, PCB's, and petroleum hydrocarbons.The Marine Culture Laboratory developed techniques for small and large scale culture of crabs from eggs held under controlled conditions to aid in design of laboratory tests of the effects of environmental factors on crab survival. (81pp.)
    Keywords: Fisheries ; Biology ; Gulf of the Farallones ; San Pablo Bay ; San Francisco Bay ; California ; Dungeness crabs ; Cancer magister ; commercial fishery
    Repository Name: AquaDocs
    Type: monograph
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  • 3
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    Dungeness crab research program: Report for the Year 1976 (2021)
    California Department of Fish and Game, Marine Resources Region | Menlo Park, CA
    In:  http://aquaticcommons.org/id/eprint/186 | 8 | 2011-09-29 22:23:36 | 186 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-27
    Description: All larval stages of the 1976 year class, with the exception of the 5th zoeal stage, were found in Gu1f waters January through March. The first post-larval stage was collected in San Pablo Bay in May. Fifty percent of 1976 year class crabs entered the Bay complex as compared to nearly 80% in 1975. The 1976 year class appears relatively weak. No electrophoretic polymorphism was found in Cancer magister to be of value in Dungeness crab population determinations.Multi-variate correlations comparing crab landings with an array of oceanographic parameters and the crab density dependent factor were computer-run for both northern and central California. The most significant correlating factors at the time late stage larvae prevail were sea level and atmospheric pressure for central California and, for northern California, the density dependent factor and sea surface temperature. Female crabs held at controlled temperatures indicated gonad maturation and spawningmay be induced by increased temperature. Analyses of crabtissues revealed burdens of petroleum hydrocarbons, silver,selenium, cadmium, and PCB's higher in central California crabs, while DDE was found in higher amounts in northern California crab tissue.Thru-flow culture systems were developed which should yield about 163 megalopae of Dungeness crabs in 63 days from 1,200 laboratory hatched zoeae.(46pp.)
    Keywords: Fisheries ; Biology ; Dungeness crab ; California ; Cancer magister ; fisheries
    Repository Name: AquaDocs
    Type: monograph
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  • 4
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    The status of the Pacific sardine resource and its management (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/669 | 8 | 2011-09-29 21:43:30 | 669 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: The Pacific sardine fishery has declined from a catch ofalmost 8 hundred-thousand tons in the nineteen thirties torelative insignificance at present. This decline was primarilydue to the decline of the northern subpopulation.Scientists feel that the only remedial measure which wouldbe effective is a complete ban on sardine fishing in California and northern Baja California. (17pp.)
    Keywords: Management ; Fisheries ; Biology ; Pacific sardine ; Sardinops sagax
    Repository Name: AquaDocs
    Type: monograph
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