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  • 1
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    Biomass estimates of Pacific herring, Clupea harengus pallasi, in California from the 1980-81 spawning ground surveys (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/309 | 8 | 2011-09-29 22:15:35 | 309 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: The spawning biomass of Pacific herring in San FranciscoBay and Tomales Bay was estimated to be 65,441 tons and 5,583tons, respectively during the 1980-81 season. This is thehighest estimate to date for San Francisco and continuesa rising trend in abundance. The Tomales Bay population hasfluctuated around an annual mean of 6,000 tons since 1973. (24pp.)
    Keywords: Management ; Fisheries ; Pacific herring ; Clupea harengus pallasi ; Tomales Bay ; San Francisco Bay
    Repository Name: AquaDocs
    Type: monograph
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  • 2
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    Biological characteristics of the catch from 1984-85 Pacific herring, Clupea harengus pallasi, roe fishery in California (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/327 | 8 | 2011-09-29 22:15:10 | 327 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: In Tomales Bay, 5-, 6-, and 7-yr-old herring, Clupea harengus pallasi, composed 75% by number of the 1984-85 season's catch. In San Francisco Bay, 2-, 3-, and 4-yr-old herring composed 82% by number of the roundhaul catch, and 5-, 6-, and 7-yr-old herring composed 68% by number ofthe gill net catch.The percent of 4-yr-old herring increased to a record high level in the San Francisco Bay gill net catch.Recruitment of 2-yr-old herring into the San Francisco Bay roundhaul fishery was excellent, with 2-yr-old herring composing 41% of the catch.The growth rate of herring improved in both Tomales and San Francisco Bays, after the period of poor growth during the recent El Nino, when the weight of herring averaged 20% below normal.(23pp.)
    Keywords: Management ; Fisheries ; Biology ; Pacific herring ; Clupea harengus pallasi
    Repository Name: AquaDocs
    Type: monograph
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  • 3
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    Biological characteristics of the catch from the 1986-87 Pacific herring, Clupea harengus pallasi, roe fishery in California (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/334 | 8 | 2011-09-29 22:13:42 | 334 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: In Tomales Bay, 4-, 5-, and 6-yr-old herring, Clupea harengus pallasi, composed 85% by number of the 1986-87 season's catch. In San Francisco Bay, 2-, 3-, and 4-yr-old herring composed 88% of the roundhaul catch, and 4-, 5-, and 6-yr-old herring composed 86% by number of the gill net catch.The age composition of both the Tomales Bay and San Francisco Bay gill net catch has shifted to primarily 4-, 5-, and 6-yr-old herring.Recruitment of 2-yr-old herring into the San Francisco Bay roundhaul fishery was good, with the 1985 yr class composing 37% of the catch.The mean length of herring in the San Francisco Bay roundhaul catch decreased to 174 mm BL, and the mean length of the gill net catch decreased to 194 mm BL. The mean length of the Tomales Bay catch also decreased to197 mm BL.Average weight at age of Tomales Bay herring is below average for the fourth consecutive year. In San Francisco Bay the average weight at age is above average, even though length at age declined slightly. (20pp.)
    Keywords: Management ; Fisheries ; Biology ; Pacific herring ; Clupea harengus pallasi
    Repository Name: AquaDocs
    Type: monograph
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  • 4
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    Biological characteristics of the gill net catch from the 1988-89 Pacific herring, Clupea harengus pallasi, roe fishery in California (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/355 | 8 | 2011-09-29 22:11:17 | 355 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: In Tomales Bay, 4-, 5-, and 6-yr-old herring, Clupea harengus pallasi, comprised 83% by number of the 1988-89 season's gill net catch.Recruitment of the 1985 year class (4-yr-olds) was relatively good, comprising 22% of the gill net catch by number.Average length of the Tomales Bay gill net catch decreased to 197 mm BL because the percent of 3- and 4-yr-olds in the catch doubled over the 1987-88 season.Average weight of 4- through 8-yr-olds returned to normal this season, reversing a downward trend.The origin of the Tomales Bay catch this season changed to Bodega Bay, and the possibility that the catch may be from a different stock must be considered.In San Francisco Bay, 4-, 5-, and 6-yr-old herring comprised 81% by number of the gill net catch; average length of the catch stabilized at 195 mm BL.A subtle gear change this season is believed to have resulted in very little change in the San Francisco Bay catch characteristics. A lighter monofilament that stretches easily was used in gill nets this season. This type gear effectively lowered the mesh size of many gill nets to 2 in. These gill nets technically were legal (2 1/8 in.) whenmeasured because they stretched easily. (18pp.)
    Keywords: Management ; Fisheries ; Biology ; Pacific Herring ; Clupea harengus pallasi
    Repository Name: AquaDocs
    Type: monograph
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  • 5
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    Biological characteristics of the catch from the 1991-92 Pacific herring, Clupea pallasi, roe fishery in San Francisco Bay and Tomales Bay (2021)
    California Department of Fish and Game, Marine Resources Division | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/367 | 8 | 2011-09-29 22:11:15 | 367 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-29
    Description: The Tomales-Bodega Bay catch during the past two seasonshas been from the northern part of outer Bodega Bay, dueto the closure of the Tomales Bay fishery.In the Tomales-Bodega Bay area, 4-, 5-, and 6-yr-oldherring, Clupea pallasi, comprised 84% by number of the1991-92 season's gill net catch.The number of 4-yr-olds increased to 26% of the gill netcatch, the second consecutive year that the percentage of 4yr-olds has increased. Four-yr-olds are completely recruited into the gill net fishery, and thus are a good indicator of relative year class strength.Average length of herring in the Tomales-Bodega Bay areagill net catch decreased due to a shift to younger herringin the catch.Herring age and size data obtained from Tomales Bay with avariable-mesh research gill net were similar to data fromSan Francisco Bay obtained with the same net. Herring over7-yrs-old were absent from the Tomales Bay variable-meshgill net and the outer Bodega Bay commercial gill net samples.In San Francisco Bay, the age composition of the gill netcatch was again 4-, 5-, and 6-yr-old herring, whichcomprised 87% of the catch. In the round haul fishery, 3and4-yr-old herring dominated, comprising 63% of the catch.Recruitment of 2-yr-old herring was poor.The average length of herring in the San Francisco Bay gillnet catch was the lowest on record, 189 mm body length (BL).The average length of herring in the round haul catchincreased to 179 mmBl due to poor recruitment of youngherring. (25pp.)
    Keywords: Management ; Fisheries ; Biology ; Pacific herring ; Clupea pallasi ; roe fisheries ; San Fancisco Bay ; Tomales Bay ; California
    Repository Name: AquaDocs
    Type: monograph
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  • 6
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    Biomass estimates of Pacific herring, Clupea harengus pallasi, in California from the 1982-83 spawning-ground surveys (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/317 | 8 | 2011-09-29 22:14:09 | 317 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: The spawning biomass of Pacific herring, Clupea harenguspallasi, in San Francisco Bay and Tomales Bay was estimatedto be 59,000 tons and 11,200 tons, respectively during the1982-83 season. This represents a 40% decline in SanFrancisco Bay and a 50% increase in Tomales Bay populations.Unusually high ocean temperatures and record rainfall inCalifornia are believed to have affected the distributionand/or survival of herring and caused changes in spawning habits. (26pp.)
    Keywords: Management ; Fisheries ; Biology ; Pacific herring ; Clupea harengus pallasi
    Repository Name: AquaDocs
    Type: monograph
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  • 7
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    Biological characteristics of the catch from 1982-83 Pacific herring, Clupea harengus pallasi, roe fishery in California (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/318 | 8 | 2011-09-29 22:14:11 | 318 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: The Tomales Bay gill net fishery was dominated by 5-, 6-, and 7-yr-old herring, Clupea harengus pallasi, which combined for 82% of the catch in the 1982-83 season. The San Francisco Bay gill net fishery was dominated by 5- and 6-yr-old herring, which combined for 64% of the catch. The San Francisco Bay roundhaul fishery was dominated by 3-, 4-,and 5-yr-old herring that combined for 72% of the catch. Two-year-olds composed only 14% of the catch in San Francisco Bay, indicating poor recruitment of the 1981 yr class. The mean length of herring in the Tomales Bay catch declined to 208 mm BL, but the mean length of the San Francisco Bay gill net and roundhaul fisheries increasedto 203 mm BL and 183 mm BL, respectively. (13p.)
    Keywords: Management ; Fisheries ; Biology ; Pacific herring ; Clupea harengus pallasi
    Repository Name: AquaDocs
    Type: monograph
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  • 8
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    Biomass estimates of Pacific herring, Clupea pallasi, in California from the 1991-92 spawning-ground surveys (2021)
    California Department of Fish and Game, Marine Resources Division | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/365 | 8 | 2011-09-29 22:10:57 | 365 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: The spawning biomass of Pacific herring, Clupeapallasi, estimated from spawning-ground surveys inSan Francisco Bay declined to 41,000 tons this season.This was the second consecutive year that the SanFrancisco Bay herring population estimate has declined.In Tomales Bay, the 1991-92 season spawning biomassestimate, including the catch of 24 tons from Bodega Bay,was 1,238 tons. This was the third consecutive seasonthat the Tomales-Bodega area herring population hasincreased.The 1991-92 Humboldt Bay herring spawning biomass estimateof 225 tons, was nearly half of last season's estimate of400 tons.December and January were the peak months of spawningactivity in all areas surveyed.In San Francisco Bay, the first major spawn since the 1981-82 season occurred in the Sausalito area, and the Oakland-Alameda area accounted for 50% of all spawning activity.A total of 3.5 million m2 of eelgrass, Zostera marina,was measured in Tomales Bay this season. The eelgrassdensity declined in most beds this season. (46p.)
    Keywords: Management ; Fisheries ; Biology ; Pacific herring ; Clupea pallasi
    Repository Name: AquaDocs
    Type: monograph
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  • 9
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    Results of sampling clammers in Elkhorn Slough during 1978 and 1979 (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/291 | 8 | 2011-09-29 22:17:22 | 291 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: A limit of 12 gapers and common Washington clams, incombination, may be taken from Elkhorn Slough on anyminus tide. Average catch rates range from 3 to 7clams per h on tides between 0.0 and minus 0.4 ft andincrease up to 17 clams per h on tides lower thanminus 1.4 ft. The size of clams taken increased withlower tides and ranged from 30 to 200 mm SD (shell diameter)for gapers and from 40 to 135 mm SD for commonWashingtons. Gapers and common Washingtons averaged119 and 100 mm SD, respectively. (15pp.)
    Keywords: Management ; Fisheries ; Aquaculture ; Washington clams ; Elkhorn Slough
    Repository Name: AquaDocs
    Type: monograph
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  • 10
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    Biomass estimates of Pacific herring, Clupea harengus pallasi, in California from the 1981-82 spawning ground surveys (2021)
    California Department of Fish and Game, Marine Resources Region | Monterey, CA
    In:  http://aquaticcommons.org/id/eprint/313 | 8 | 2011-09-29 22:15:33 | 313 | California Department of Fish and Game
    Details
    Publication Date: 2021-06-28
    Description: The spawning biomass of Pacific herring in San Francisco Bay and Tomales Bay was estimated to be 99,495 tons and 7,149 tons, respectively during the 1981-82 season. This is the highest estimate to date for San Francisco Bay and continues a rising trend in abundance. The Tomales Bay population increased to the highest level in 4 years. (22pp.)
    Keywords: Management ; Fisheries ; Pacific Herring ; Clupea harengus pallasi ; Tomales Bay ; San Francisco Bay
    Repository Name: AquaDocs
    Type: monograph
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