1,707 research outputs found
A report on the sea otter, Enhydra lutris L., in California
Get PDFThis report discusses in detail findings and observations
of 5 years of research on the sea otter population and its
relationship 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 expanding
sea otter population in California and its effects on
resources utilized by man. Recommendations for sea otter
management consistent with esthetic, recreational, and commercial uses of marine resources are included in this report. (95pp.
Mariculture in California
Get PDFMariculture in California is currently under development
by several private concerns, universities, and by the
California Department of Fish and Game. At present, most
of these efforts classify as research and development with
a few in the pilot production phase.
The Department of Fish and Game is presently conducting
research in the culture of mortality resistant strains of
Pacific oyster, Crassostrea virginica, the red abalone,
Haliotis rufescens, and the spot prawn, Pandalus platyceros. (18pp.
Species Profiles: Life Histories and Environmental Requirements of Coastal Fishes and Invertebrates (Pacific Southwest): Black, green, and red abalones
Get PDFAll abalones belong to the genus
Haliotis sensu latu, family Haliotidae.
The 75 species known worldwide
(Booloot ian et, al. 1962) are anatomically
similar and all are adapted for
attachment to hard substrates. Seven
species are widely distributed along
the coast of California (Cox 1962;
Mottet 19781, of which several are
important in the comercial and sport
fisheries of the Pacific Southwest. (PDF has 19 pages.
The Feasibility of Enhancing Red Sea Urchin, Strongylocentrotus iranciscanus, Stocks in California: An Analysis of the Options
Get PDFThe California fishery for red sea urchins, Strongylocentrotus franciscanus, has undergone explosive growth in recent years and is approaching full exploitation. Thus, there is considerable interest in enhancing stocks to maintain a high rate of landings. Fishable stocks of red sea urchins in different areas appear to be limited at three stages in their life history: By the availability of larvae, by the survival of newly settled to mid-sized animals, and by the food available to support growth and reproduction of larger animals. Here I review other efforts, notably the extensive Japanese work, to enhance fishable stocks of benthic marine invertebrates, and consider the potential options for red sea urchins at different points of limitation. These include collecting or culturing seed for outplanting, physical habitat improvement measures, improving the food supply, and conservation measures to protect existing stocks until alternate methods are proven and in place. The options are compared in terms of biological feasibility, capital and labor requirements, and potential implications for change in the structure of the fishing industry
Diablo Canyon power plant site ecological study Quarterly Report no. 19: January 1 - March 31, 1978
Get PDFField work was limited to monitoring permanent
intertidal and subtidal stations. Only a few
stations were surveyed due to a long series of
winter storms which produced large seas.
Office and laboratory work was devoted to completing computer data sheets for keypunching, completing the 1976/77 annual report and several quarterly reports, and processing the remaining algae samples collected at subtidal and intertidal stations in 1977.
Sea otter activity increased in South Cove and
Diablo Cove where sea otters were observed on
five out of 20 observation days. (11pp.
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