Biological characteristics of the gill net catch from the 1987-88 Pacific herring, Clupea harengus pallasi, roe fishery in California

Spratt, Jerome D. (1988) Biological characteristics of the gill net catch from the 1987-88 Pacific herring, Clupea harengus pallasi, roe fishery in California. Monterey, CA, California Department of Fish and Game, Marine Resources Region, (Marine Resources Administrative Report, 88-6)

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Abstract

In Tomales Bay, 5-, 6-, and 7-yr-old herring, Clupea harengus pallasi, comprised 83% by number of the 1987-88 season's gill net catch. Recruitment of the 1984 yr class (4-yr olds) was relatively poor, comprising only 11% of the gill net catch by number. In addition, the 1985 yr class comprised <1% of the gill net catch, the weakest showing of 3-yr olds in four seasons. Average length of the Tomales Bay gill net catch increased to 201 mm BL, due to the low numbers of 3- and 4-yr-old herring in the catch. Average weight of 4- through 8-yr-old herring remains below the long-term mean and is at the second lowest level in the past nine seasons. In San Francisco Bay, 4-, 5-, and 6-yr-old herring comprised 82% by number of the gill net catch; average length of the catch increased to 195 mm BL, the first increase in four seasons. Four strong year classes beginning with 1982 have a positive impact on the San Francisco Bay gill net catch characteristics. (17pp.)

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