Pacific herring, Clupea pallasi, studies and fishery management in Tomales Bay 1992-93, with notes on Humboldt Bay and Crescent City area landings

Moore, Thomas O. and Mello, John J. (1995) Pacific herring, Clupea pallasi, studies and fishery management in Tomales Bay 1992-93, with notes on Humboldt Bay and Crescent City area landings. Bodega Bay, CA, California Department of Fish and Game Marine Resources Divison, (Marine Resources Divison Administrative Report, 95-5)

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Abstract

The 1992-93 spawning biomass estimate for Pacific herring, Clupea pallasi, in Tomales Bay increased for the fourth year in a row to 4,078 tons. This is the highest estimate since the 1986-87 season. The December spawning biomass total of 1,346 tons was the second highest December escapement total since surveys began in 1972-73. A total of 3.58 million m2 of eelgrass, Zostera marina, was measured in Tomales Bay this season. Eelgrass density increased in the majority of beds. The commercial catch of 222 tons was taken entirely from Tomales Bay since outer Bodega Bay was closed to herring fishing during the season. Gill net mesh size was increased to 2.125 inches from 2.0 inches this season. Herring aged 4,5, and 6 comprised 92% by number of the season's herring catch. Mean weight of herring for each age decreased while mean length for all ages combined increased slightly. Tomales Bay herring samples indicated that older year-classes, missing in commercial catch samples, were present prior to the January start of the commercial fishery. The abundance of 4-yr-old herring was low in samples from variable-mesh and commercial gill nets, indicating less than average recruitment of the 1989 year-class. In Humboldt Bay the 1992-93 season commercial herring catch totalled 28.6 tons, less than half of the 60-ton quota. Crescent City area herring fishermen nearly caught their 30-ton quota with a total of 28.5 tons landed. No spawning biomass estimate is available for the 1992-93 season for either area. (29pp.)

Item Type: Monograph or Serial Issue
Title: Pacific herring, Clupea pallasi, studies and fishery management in Tomales Bay 1992-93, with notes on Humboldt Bay and Crescent City area landings
Personal Creator/Author:
CreatorsEmail
Moore, Thomas O.
Mello, John J.
Series Name: Marine Resources Divison Administrative Report
Number: 95-5
Date: 1995
Publisher: California Department of Fish and Game Marine Resources Divison
Place of Publication: Bodega Bay, CA
Latitude: 38.1696
Longitude: -122.91
Issuing Agency: California Department of Fish and Game
Uncontrolled Keywords: Pacific Herring, Clupea pallasi, Tomales Bay, California
Subjects: Management
Fisheries
Item ID: 101
Depositing User: Joan Parker
Date Deposited: 12 Aug 2007 14:09
Last Modified: 29 Sep 2011 22:35
URI: http://aquaticcommons.org/id/eprint/101

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