Moore, Thomas O. and Mello, John J.
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)
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.)
Monograph or Serial Issue
||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.|
|Mello, John J.|
||Marine Resources Divison Administrative Report
||California Department of Fish and Game Marine Resources Divison
|Place of Publication:
||Bodega Bay, CA
||California Department of Fish and Game
||Pacific Herring, Clupea pallasi, Tomales Bay, California
||12 Aug 2007 14:09
||29 Sep 2011 22:35
Actions (login required)