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  • 1
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    Pacific oyster disease and mortality studies in California (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/678 | 8 | 2011-09-29 21:42:21 | 678 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: Investigation of Pacific oyster mortalities was carriedout over a six-year period in major northern and centralCalifornia oyster rearing areas. Effort was directed towarddefining areas of high oyster mortality and determiningpossible etiologies of observed losses through monthly monitoring and sampling of experimental and commercial oyster populations in Morro Bay, Elkhorn Slough, Drakes Estero, Tomales Bay and Humboldt Bay.Hydrographic data was collected in all areas and a two yearstudy of phytoplankton and water quality in Humboldt Baywas initiated to observe relationships with oyster mortalitypatterns.Research undertaken to develop methods to alleviate losses among Pacific oyster populations included an oyster seed source study, investigation of optimal oyster culturingtechniques and preliminary efforts to develop a mortalityresistant strain of oysters in Humboldt Bay. The cause ofmortality among Pacific oyster populations in Humboldt Bayremains uncertain but a bacterial etiology correlated withelevated water temperatures is suspected. The best methodof circumvention of losses appears to be the culturing of"domestic" seed sources on racks. (55pp.)
    Keywords: Management ; Aquaculture ; Biology ; Pacific oyster ; Crassostrea gigas ; California
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
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  • 2
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    Neoplasia in California marine fishes (2021)
    California Department of Fish and Game, Marine Resources Region | Menlo Park, CA
    In:  http://aquaticcommons.org/id/eprint/214 | 8 | 2011-09-29 22:26:34 | 214 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-27
    Description: Etiologies other than pollution have been suggested in regard to the occurrence of dermal necrosis in marine fish. A study of fish collected from estuarine and ocean waters ofCalifornia was made in 1972 and 1973 to determine the geographical extent of fish exhibiting neoplastic-like growths. Samples of fish were obtained from the estuarine areas of San Francisco Bay and Humboldt Bay and ocean areas off northern, central, and southern California. Monterey Bay was the only area from which neoplastic abnormalities had not been reported previously or observed in samples taken in this study. (8pp.)
    Keywords: Health ; Pollution ; Biology ; Marine fishes ; diseases ; California ; dermal necrosis
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
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