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  • 1
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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
    Repository Name: AquaDocs
    Type: monograph
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  • 2
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    The Southern California Jack Mackerel fishery and age composition of the catch for the 1947-48 through 1956-57 seasons (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/676 | 8 | 2011-09-29 21:42:22 | 676 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: The southern California commercial catch of jack mackerel experienced a tremendous expansion during the 1947-48 season. Landings ranged from a high of 158.7 million pounds landed during 1952-53 t o a low of 14.0 million pounds landed during 1954-55.The 1947 year class contributed 296,718 thousand fish and 167,997 thousand pounds. (49pp.)
    Keywords: Management ; Fisheries ; Biology ; Southern California ; Jack Mackerel ; Trachurus symmetricus
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    Type: monograph
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  • 3
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    The Southern California jack mackerel fishery and age composition of the catch for the 1957-58 through 1961-62 seasons (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/677 | 8 | 2011-09-29 21:42:28 | 677 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-01
    Description: Approximately 29.7,25.9, 50.9, 64.6, and 102.9 millionpounds were landed for the 1957-58 through 1961-62 seasons.The 1957, 1958, 1959, and 1960 year classes each contributedover 100 million fish to the fishery over the fiveseasons. The 1958 year class also contributed 112 millionpounds landed. (27pp.)
    Keywords: Management ; Fisheries ; Biology ; Southern California ; jack mackerel ; Trachurus symmetricus
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    Type: monograph
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  • 4
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    The Southern California jack mackerel fishery and age composition of the catch for the 1962-63 through 1966-67 seasons (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/681 | 8 | 2011-09-29 21:40:58 | 681 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-02
    Description: Commercial landings for the 1962-63 through 1966-67 seasons ranged from a high of 92.9 million pounds landed in 1962-63 to a low of 41.2 million pounds landed during 1966-67.The 1958 year class contributed 401,054,000 fish and127,207,000 pounds through the 9 seasons it was present inthe fishery. This was the largest number of fish contributedto the fishery by any year class since jack mackerel canningstarted in 1947. (30pp.)
    Keywords: Management ; Fisheries ; Biology ; southern California ; jack mackerel ; Trachurus symmetricus
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    Type: monograph
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  • 5
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    The Southern California jack mackerel fishery and age, length and sex composition of the catch for the 1967-68 through 1971-72 seasons (2021)
    California Department of Fish and Game | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/757 | 8 | 2021-02-27 19:33:34 | 757 | California Department of Fish and Game
    Details
    Publication Date: 2021-07-02
    Description: Commercial landings for 5 seasons, 1967-68 through1971-72, approximated 36.5, 58.7, 36.8, 57.0 and 56.2million pounds respectively (16,600; 26,600; 16,700;25,900 and 25,500 Mg).The 1967 year class dominated the fishery during the 1967-68 and 1968-69 seasons. The 1970 year class, in the fishery only 2 years, contributed an estimated 250 million fish and 45 million pounds (20,400 Mg). (46pp.)
    Keywords: Fisheries ; Biology ; Southern California ; jack mackerel ; Trachurus symmetricus ; life history
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    Type: monograph
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  • 6
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    Fish and bivalves at Bolsa Chica Marsh re-establishment project: Progress report II (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/11 | 8 | 2011-09-29 22:40:57 | 11 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: The objectives of our fish and bivalve study are:1. Determine changes in the number of species of fishand bivalves before Phase I and during Phase I atBolsa Chica Marsh.2. Determine if California Department of Fish and Game'spredicted benefits in Phase I were achieved by increasesin fish species.3. Determine influences of water management practicesupon fish and bivalve composition.Nine species of fish and three species of bivalves werecollected above the tide gates. Goldfish, Carassius auratus;shiner surfperch, Cymatogaster aggregata; queenfish, Seriphus politus; and California jackknife clam, Tagelus californianus have not been reported previously from above the tide gates. Five species of fish and four species of bivalves were collected below the tide gates. Striped bass, Roccus saxatilis; and cheekspot goby, Ilypnus gilberti have not been reported previously from below the tide gates. (8pp.)
    Keywords: Ecology ; Fisheries ; Biology ; Bolsa Chica Marsh ; fish ; bivalves ; California
    Repository Name: AquaDocs
    Type: monograph
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  • 7
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    Fish and bivalves at Bolsa Chica Marsh re-establishment project; Progress report III (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/13 | 8 | 2011-09-29 22:41:07 | 13 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: The objectives of our fish and bivalve study are:1. Determine changes in the number of species of fishand bivalves before Phase I and during Phase 1 atBolsa Chica Marsh.2. Determine if California Department of Fish and Game'spredicted benefits in Phase I were achieved by increasesin fish species.3. Determine influences of water management practicesupon fish and bivalve composition.Thirteen species of fish and five species of bivalveswere collected from Inner Bolsa Bay and South Bolsa Slough.Deepbody anchovy, Anchoa compressa; jacksmelt, Atherinopsiscaliforniensis; longjaw mudsucker, Gillichthys mirabilis;specklefin midshipman, Porichthys myriaster; round stingray,Urolophus halleri; banded chione, Chione californiensis;bentnose clam, Macoma nasuta; and common littleneck clam,Protothaca staminea have not been reported previously fromInner Bolsa Bay. Nine species of fish and four species ofbivalves were collected from outer Bolsa Bay. Yellowfin goby, Acanthogobius flavimanus; longjaw mudsucker; tilapia, Tilapia mossambica; and bay pipefish, Syngnathus leptorhynchus have not been reported previously from Outer Bolsa Bay. (11pp.)
    Keywords: Ecology ; Fisheries ; Biology ; Bolsa Chica Marsh ; fish ; bivalves
    Repository Name: AquaDocs
    Type: monograph
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  • 8
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    Status of Pacific mackerel spawning population, 1975 (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/61 | 8 | 2011-09-29 22:38:37 | 61 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: Three methods were used to determine the Pacific mackerelpopulation. The tag and recovery method estimated thepopulation at 620 short tons. The other two estimateswere based on regression techniques of partyboat catchesand these results yielded 2,921 tons and 1,385 tons,respectively. All three estimates were below the 10,000tons prescribed for a fishery and thus no harvest couldbe allowed. (14pp.)
    Keywords: Fisheries ; Biology ; Scomber japonicus ; Pacific mackerel ; population estimates
    Repository Name: AquaDocs
    Type: monograph
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  • 9
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    Results of the 1977 southern California pismo clam survey (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/75 | 8 | 2011-09-29 22:38:00 | 75 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-25
    Description: A Pismo clam, Tivela stultorum, survey was conductedin January 1977 on selected southern California beaches.Effort and catch information was collected through clammer interviews. Estimates for the two day survey were 1,596clammers spending 2,506 hours to take 6,139 clams. Comparisons were made between the 1977 survey results andprevious surveys.Clams were collected for length and age studies. Complianceto the 4.5-inch (114.3 mm) minimum size limit appeared to be good. (15pp.)
    Keywords: Fisheries ; Biology ; Pismo clam ; Tivela stultorum ; California
    Repository Name: AquaDocs
    Type: monograph
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  • 10
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    Results of the 1976 southern California pismo clam census (2021)
    California Department of Fish and Game, Marine Resources Region | Long Beach, CA
    In:  http://aquaticcommons.org/id/eprint/95 | 8 | 2011-09-29 22:36:12 | 95 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-26
    Description: A Pismo clam, Tivela stultorum, census was conductedin January 1976 on selected southern California beaches.Effort and catch information was collected throughclamer interviews. Estimates for January 17 on beachessampled were 3,296 clammer-hours, 2,170 clammers, and10,739 legal clams (4.5 inches or larger) harvested.Clams were collected for age and growth studies.Samples of clams from the Long Beach to Newport Beach pierarea demonstrate the fastest growth rates of any Pismoclams reported in the literature. Clams begin to be recruited to the fishery at age 40 months. (14pp.)The 1974 year class was the largest on beachessampled. Recruitment to the fishery will be poor for the1976-77 and 1977-78 seasons and clamming will be dependenton large older clams.
    Keywords: Fisheries ; Aquaculture ; Pismo clam ; Tivela stultorum ; California
    Repository Name: AquaDocs
    Type: monograph
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