Spratt, Jerome D.
Biological characteristics of the gill net catch from the 1989-90 Pacific herring, Clupea pallasi, roe fishery in California.
California Department of Fish and Game, Marine Resources Division,
(Marine Resources Administrative Report, 90-12)
The Tomales-Bodega Bay catch this season was from northern
Bodega Bay, and the possibility that this season's catch
may be from a different stock must be considered.
In the Tomales-Bodega Bay area, 5- through 8-yr-old herring, Clupea pallasi, comprised 89% by number of the 1989-90 season's gill net catch.
Recruitment of the 1986 year class (4-yr olds) was relatively poor, comprising only 9% of the gill net catch by number.
Average length of the Tomales-Bodega Bay area gill net
catch increased to 204 mm BL because the number of 3- and
4-yr olds in the catch decreased to 11%, the lowest level
since the 1982-83 season.
The average weight at age of 4-through 8-yr-old herring did
not change significantly this season.
In San Francisco Bay, for the first time since the 1982-83
season, 5-, 6-, and 7-yr-old herring were the dominant age
groups comprising 79% by number of the gill net catch. This
reverses a trend toward younger and smaller herring in the
gill net catch.
The average length of herring in the San Francisco Bay gill
net catch increased to 196 mm BL.
The change in the size and age composition is attributed to
better enforcement of the 2 1/8 in. gill net mesh regulation.
The sex ratio of the gill net catch also improved.
Females comprised 53% of the catch in both San Francisco and Tomales bays. (19pp.)
Monograph or Serial issue
||Biological characteristics of the gill net catch from the 1989-90 Pacific herring, Clupea pallasi, roe fishery in California
|Spratt, Jerome D.|
||Marine Resources Administrative Report
||California Department of Fish and Game, Marine Resources Division
|Place of Publication:
||California Department of Fish and Game
||Pacific herring, Clupea pallasi, California
||12 Aug 2007 14:11
||29 Sep 2011 22:36
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