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  • 1
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    Status and management of spring-run chinook salmon (2021)
    California Department of Fish and Game
    In:  http://aquaticcommons.org/id/eprint/20669 | 222 | 2016-05-20 22:21:15 | 20669 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-11
    Description: Runs have dwindled in many parts of California and additional protection or management actions are needed to protect the fish from further declines. The following is a report requested by the Fish and Game Commission on the status and current management of spring-run chinook salmon stocks.Fish counts presented in this report were developed by a variety of methods. Some of them are estimates of total run-size or spawning escapement, while others are indices of abundance derived from counts of maturing fish in their holding areas. It is important to note the stock assessment method used. Index area counts will always underestimate the true run size, often by a very large margin.
    Keywords: Fisheries ; Management
    Repository Name: AquaDocs
    Type: monograph
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  • 2
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    The status of the northern Anchovy resource and its management (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/661 | 8 | 2011-09-29 21:43:43 | 661 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: The northern anchovy, Engraulis mordax, has been thesubject of increasing exploitation during the last 60 years.Concentrated studies of its biology and population dynamicshas yielded population estimates of 5 to 8 million metrictons or about 5 to 10 times that existing during 1950-51.Continuing cooperative study programs between the State ofCalifornia, the Federal Government and the government ofMexico are recommended. (15pp.)
    Keywords: Management ; Fisheries ; Biology ; Northern anchovy ; Engraulis mordax
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  • 3
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    Status of the Jack Mackerel resource and its management (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/667 | 8 | 2011-09-29 21:43:27 | 667 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: The jack mackerel, Trachurus symmetricus, resource off thewest coast of North America is known to be large and widelydistributed. The spawning biomass is estimated to be 2.1 to 4.8 million tons based upon abundance of jack mackerel eggs collected at sea. The distribution extends from the Gulf of Alaska to the Gulf of Tehuantepec, off the coast of southern Mexico, and as far as 1,500 miles seaward. Within this range lies an area of maximum density which extends from Point Conception to central Baja California.Jack mackerel biological data has not been processed veryrapidly due to higher priorities for analysis of sardine andPacific mackerel data, and the apparent healthy condition ofthis resource. The California Department of Fish and Gameinitiated several projects in 1972 to resolve unanswered biological questions. (14pp.)
    Keywords: Management ; Fisheries ; Biology ; Jack mackerel ; Trachurus symmetricus
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  • 4
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    The status of the Pacific mackerel resource and its management (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/668 | 8 | 2011-09-29 21:43:29 | 668 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: Recent developments in management, biological knowledge,and history of the Pacific mackerel, Scomber japonicus, resource and its fishery in California and Mexico are reviewed. Currently the resource is extremely depleted, and commercial fishing has been curtailed. The 1970 year class was successful, and eventual rehabilitation of the fishery is anticipated. (15pp.)
    Keywords: Management ; Fisheries ; Biology ; Pacific mackerel ; Scomber japonicus
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  • 5
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    Mariculture in California (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/673 | 8 | 2011-09-29 21:42:47 | 673 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: Mariculture in California is currently under developmentby several private concerns, universities, and by theCalifornia Department of Fish and Game. At present, mostof these efforts classify as research and development witha few in the pilot production phase.The Department of Fish and Game is presently conductingresearch in the culture of mortality resistant strains ofPacific oyster, Crassostrea virginica, the red abalone,Haliotis rufescens, and the spot prawn, Pandalus platyceros. (18pp.)
    Keywords: Management ; Fisheries ; Aquaculture ; Biology ; Mariculture ; California ; Pacific oyster ; Crassostrea virginica ; red abalone ; Haliotis rufescens ; spot prawn ; Pandalus platyceros
    Repository Name: AquaDocs
    Type: monograph
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  • 6
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    The status of the California yellowtail resource and its management (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/671 | 8 | 2011-09-29 21:42:53 | 671 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: The California yellowtail, Seriola dorsalis, is a highlyfavored sport fish and a minor commercial species. Since1954 commercial landings have been limited by demand, and thesport catch has been about three times the number of fishcaught by commercial fishermen.Recreational fishing for yellowtail in southernCalifornia waters is almost entirely dependent on annualmigrants from central and northern Baja California. The resource is presently healthy but reduced catches off California could be the result of an expanded catch off Mexico. (19pp.)
    Keywords: Management ; Fisheries ; Biology ; California yellowtail ; Seriola dorsalis ; California
    Repository Name: AquaDocs
    Type: monograph
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  • 7
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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
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  • 8
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    Average lunar monthly catch of sardines in California for the 1954-55 through 1961-62 seasons (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/679 | 8 | 2011-09-29 21:41:50 | 679 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: The catch per unit of effort of the sardine along thecoast of California has been published for the period 1932 to 1953. This paper continues the catch per unit of effort study through the 1961-62 season. Although the catch per unit of effort varied greatly during this later period, it never reached the high levels reported during the 1940's or decreased below the values reported for the disastrous seasons of 1952-53 and 1953-54. Mortalities and year class strengths are briefly discussed. (45pp.)
    Keywords: Fisheries ; Biology ; sardine ; California
    Repository Name: AquaDocs
    Type: monograph
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  • 9
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    California's Pacific bonito resource, its status and management (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/704 | 8 | 2011-09-29 21:40:10 | 704 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-02
    Description: Pacific bonito, Sarda chiliensis, have become increasinglyimportant to California's sport and commercial fishermen sincethe early 1960's, but are now showing signs of decline. Recentinvestigations have revealed much about the bonito's lifehistory and population dynamics.These recent discoveries have been brought together into a document which will serve as a guide to future managementactions. Document has 44 pages.
    Keywords: Management ; Fisheries ; Biology ; California ; Pacific bonito ; Sarda chiliensis
    Repository Name: AquaDocs
    Type: monograph
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  • 10
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    A report on the sea otter, Enhydra lutris L., in California (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/674 | 8 | 2011-09-29 21:42:26 | 674 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: This report discusses in detail findings and observationsof 5 years of research on the sea otter population and itsrelationship to the nearshore marine environment in California. Initial efforts were directed at providing some relief to the commercial abalone fishery in the Cambria - Point Estero area north of Morro Bay. This fishery has subsequently collapsed along with other commercial and sport abalone and sport crab fisheries throughout the sea otter's range due to continued sea otter foraging. Capturing, tagging and translocation studies, censusing studies, examination of sea otter remains, habitat surveys, food habits observations and studies on otters in captivity provide a broad base of information on the expandingsea otter population in California and its effects onresources utilized by man. Recommendations for sea ottermanagement consistent with esthetic, recreational, and commercial uses of marine resources are included in this report. (95pp.)
    Keywords: Management ; Biology ; sea otter ; Enhydra lutris ; California ; Estero Bay ; Monterey Bay
    Repository Name: AquaDocs
    Type: monograph
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