Biological characteristics of the gill net catch from the 1989-90 Pacific herring, Clupea pallasi, roe fishery in California

Spratt, Jerome D. (1990) Biological characteristics of the gill net catch from the 1989-90 Pacific herring, Clupea pallasi, roe fishery in California. Monterey, CA, California Department of Fish and Game, Marine Resources Division, (Marine Resources Administrative Report, 90-12)

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Abstract

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.)

Item Type: Monograph or Serial Issue
Title: Biological characteristics of the gill net catch from the 1989-90 Pacific herring, Clupea pallasi, roe fishery in California
Personal Creator/Author:
CreatorsEmail
Spratt, Jerome D.
Series Name: Marine Resources Administrative Report
Number: 90-12
Date: 1990
Publisher: California Department of Fish and Game, Marine Resources Division
Place of Publication: Monterey, CA
Issuing Agency: California Department of Fish and Game
Uncontrolled Keywords: Pacific herring, Clupea pallasi, California
Subjects: Fisheries
Biology
Item ID: 99
Depositing User: Joan Parker
Date Deposited: 12 Aug 2007 14:11
Last Modified: 29 Sep 2011 22:36
URI: http://aquaticcommons.org/id/eprint/99

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