Biological characteristics of the catch from the 1990-91 Pacific Herring, Clupea pallasi, roe fishery in California

Spratt, Jerome D. (1991) Biological characteristics of the catch from the 1990-91 Pacific Herring, Clupea pallasi, roe fishery in California. Monterey, CA, California Department of Fish and Game, Marine Resources Division, (Marine Resources Administrative Report, 91-5)

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Abstract

The Tomales-Bodega Bay catch during the past two seasons has been from the northern part of Bodega Bay, due to the closure of the Tomales Bay fishery. In the Tomales-Bodega Bay area, 4-, 5-, and 6-yr-old herring Clupea pallasi, comprised 79% by number of the 1990-91 season's gill net catch. The number of 4-yr olds (1987 year class) increased to 21% of the gill net catch. Four-yr olds are an indicator of recruitment strength into the gill net fishery. Average length of herring in the Tomales-Bodega Bay area gill net catch decreased due to a shift to younger herring in the catch, as well as, poor growth characteristics during 1990. Herring age and size data obtained from Tomales Bay with a variable mesh research gill net were similar to data from San Francisco Bay obtained with the same net. All age classes were taken and herring ranged in length from 148 mm to 226 mm. In San Francisco Bay, the age composition of the gill net catch was also primarily 4-, 5-, and 6-yr-old herring, which comprised 79% of the catch. In the round haul fishery 2- and 3-yr-old herring dominated, comprising 72% of the catch. The average length of herring in the San Francisco Bay gill net and round haul catches decreased. Both are the lowest recorded average lengths by the respective gear types except for the 1983-84 El Nino season. Observed poor growth characteristics this season are attributed to reduced upwelling off central California in 1990. (26pp.)

Item Type: Monograph or Serial Issue
Title: Biological characteristics of the catch from the 1990-91 Pacific Herring, Clupea pallasi, roe fishery in California
Personal Creator/Author:
CreatorsEmail
Spratt, Jerome D.
Series Name: Marine Resources Administrative Report
Number: 91-5
Date: 1991
Publisher: California Department of Fish and Game, Marine Resources Division
Place of Publication: Monterey, CA
Latitude: 38.1011
Longitude: 122.544
Issuing Agency: California Department of Fish and Game
Uncontrolled Keywords: Pacific Herring; Clupea pallasi; roe fisheries; California
Subjects: Management
Fisheries
Biology
Item ID: 363
Depositing User: Joan Parker
Date Deposited: 21 Oct 2007 20:27
Last Modified: 29 Sep 2011 22:10
URI: http://aquaticcommons.org/id/eprint/363

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