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  • 1
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    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/684 | 8 | 2011-09-29 21:41:45 | 684 | California Department of Fish and Game
    Publication Date: 2021-07-02
    Description: Sea otter foraging along Monterey Bay beaches and at Atascadero State Beach has precluded recreational Pismo clam fisheries at six major clamming beaches. Outside the sea otter's foraging range Pismo clam stocks are yielding good catches; apparently the stringent controls on the recreational fishery is adequate to maintain the State's Pismo clam stocks. Clammer interviews at Orange and Los Angeles County beaches and at beaches near Pismo Beach and Morro Bay and in Monterey Bay revealed the clam stocks to be on a healthy, sustainable yield basis. Exceptionallylarge numbers of small 1.5 to 3.5 inch Pismo clams were reported at all clam beaches surveyed north of Pt. Conception indicating good year class survival in recent years. Sea otters forage dense Pismo clam beds by moving along a "front", progressively foraging from one beach to the next, reducing the clams to low levels before moving on. Some sea otters continue to forage throughout the areas previously depleted by the larger aggregate moving northward, thus the large numbers of sublegal clamsin the 1.5 to 3.5 inch size group in these intertidal and shallow subtidal areas are not expected to reach legal size in numbers sufficient to develop a recreational fishery. In Monterey Bay about 60,000 Pismo clams were removed or killed by human activity in the April 1974 to March 1975 period. A rough estimate of the Pismo clams consumed by sea otters during this same period in Monterey Bay is over 500,000 clams. (51pp.)
    Keywords: Ecology ; Management ; Biology ; Pismo clam ; Tivela stultorum ; Sea otter ; Enhydra lutris L. ; Monterey Bay ; California
    Repository Name: AquaDocs
    Type: monograph
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  • 2
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    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/2183 | 8 | 2011-09-29 19:38:14 | 2183 | California Department of Fish and Game
    Publication Date: 2021-07-12
    Description: (PDF contains 5 pages.)
    Keywords: Fisheries ; Biology ; Santa Cruz ; California ; Point Sur ; California ; demersal fishes ; life history ; rockfish
    Repository Name: AquaDocs
    Type: monograph
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  • 3
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    California Department of Fish and Game, Marine Resources Division | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/110 | 8 | 2011-09-29 22:34:39 | 110 | California Department of Fish and Game
    Publication Date: 2021-06-26
    Description: From May 1987 to June 1990 and from August to December 1991Fishery Technicians sampled catches on board 690 CommercialPassenger Fishing Vessel (CPFV) trips targeting rockfish and lingcod from the general port areas of Fort Bragg, Bodega Bay, San Francisco, Monterey, and Morro Bay. Data are presented for species composition by port area, year, and month, for catch-per-unit-effort, mean length, and length frequency of lingcod and the 18 most frequently observed rockfish species, and for trends in fishing effort related to fishing time, depth, and distance from port. Total catch estimates are presented based on unadjusted logbook records, logbook records adjusted by sampling data and compliance rates, and effort data from a marine recreational fishing statistics survey. Average catch of kept fish per angler day was 11.8 and average catch of kept fish per angler hour was 3.7. A trend of an increasing frequency of trips to deep (〉40 fm) locations was observed in the Bodega Bay, San Francisco, and Monterey areas from 1988 to 1990-91. No trend was evident relative to trip frequency and distance from port.A total of 74 species was observed caught during the study.Rockfishes comprised 88.5% to 97.9% by number of the observed catch by port area. The five most frequently observed species were chilipepper, blue, yellowtail, and widow rockfishes, and bocaccio, with lingcod ranking seventh.In general, mean length and catch-per-angler-hour of sportfishes caught by CPFV anglers varied considerably and did not show steady declines during the study period. However, port-specific areas of major concern were identified forchilipepper, lingcod, and black rockfish, and to a lesserextent brown, canary, vermilion, yelloweye, olive, and widow rockfish. These areas of concern included steadily declining catch rate, steadily declining mean length, and a high percentage of sexually immature fish in the sampled-catch.Recent sampling of the commercial hook-and-line fishery innorthern and central California indicated that most species of rockfishes taken by CPFV anglers are also harvested commercially. (261pp.)
    Keywords: Management ; Fisheries ; rockfish ; lingcod ; sport fishing ; California
    Repository Name: AquaDocs
    Type: monograph
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  • 4
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    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/672 | 8 | 2011-09-29 21:42:51 | 672 | California Department of Fish and Game
    Publication Date: 2021-07-01
    Description: There are 63 species of the Family Scorpaenidae foundin the marine waters of California. Rockfish, genus Sebastesaccount for 58 of these species. Except for a few stocks ininshore waters and adjacent to ports, these species are notpresently fully exploited. (34pp.)
    Keywords: Management ; Fisheries ; Biology ; rockfish ; Sebastes sp. ; Scorpaenidae ; California
    Repository Name: AquaDocs
    Type: monograph
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  • 5
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    California Department of Fish and Game, Marine Resources Division | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/364 | 8 | 2011-09-29 22:10:54 | 364 | California Department of Fish and Game
    Publication Date: 2021-06-28
    Description: Many species of young-of-the-year (YOY) rockfish, Sebastessp. move inshore into shallow reef areas in central California each year. We monitored the dates of arrival, relative abundance, species composition, lengths, and growth rates of these arrivals to help assess recruitment variability and stock success.We tested the usefulness of the anesthetic metomidatehydrochloride as a non-lethal method to collect YOY rockfish to assess growth, abundance, and species composition. Earlier experiments by other researchers illustrated the usefulness of metomidate to collect benthic-oriented adult rockfish. Our research tested the possibility of using metomidate hydrochloride to collect open-water and benthic-oriented YOY rockfish. The anesthetic was applied and the fish captured by divers. Several concentrations of metomidate were tested, premixed both in fresh and salt water.The anesthetic was not very useful in collecting open waterYOY rockfish as the fish rapidly left the area of application and avoided being anesthetized. Increasing the concentration of metomidate did not increase success of capture of open-water YOY rockfish. However, the anesthetic metomidate worked very well in capturing benthic-oriented YOY rockfishes. (22pp.)
    Keywords: Health ; Fisheries ; Biology ; Rockfish ; Sebastes
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
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