Biological characteristics of the gill net catch from the 1987-88 Pacific herring, Clupea harengus pallasi, roe fishery in California
1988
Spratt, Jerome D.
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 relativelypoor, comprising only 11% of the gill net catch by number.In addition, the 1985 yr class comprised <1% of the gill netcatch, 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 belowthe long-term mean and is at the second lowest level in thepast nine seasons.In San Francisco Bay, 4-, 5-, and 6-yr-old herring comprised82% by number of the gill net catch; average length of thecatch increased to 195 mm BL, the first increase in fourseasons.Four strong year classes beginning with 1982 have a positiveimpact on the San Francisco Bay gill net catch characteristics. (17pp.)
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