Status of Pacific Mackerel spawning population, 1973

Frey, Herbert W. and Knaggs, Eric H. (1973) Status of Pacific Mackerel spawning population, 1973. Long Beach, CA, California Department of Fish and Game, Marine Resources Region, (Marine Resources Administrative Report, 73-7)

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Abstract

This is the first annual report of the status of the spawning population of the Pacific mackerel as required by Section 8388.3 of the Fish and Game Code. During 1972 and early 1973, several methods of determining population size were investigated as mechanisms for estimating the spawning population size of Pacific mackerel stocks north of Punta Eugenia, Baja California, and a method using tagging procedures proved to be the most acceptable. The estimate of the Pacific mackerel spawning population obtained by tagging procedures was 5,480 tons. This estimate agrees generally with those obtained from alternate methods in which previously computed spawning biomass estimates were correlated with partyboat catches in three different areas and the 1973 spawning biomass estimated from the resulting regression line. The estimates derived by these alternate methods are 6,970 tons, 4,730 tons, and 6,210 tons. All estimates are below the 10,000 ton spawning population minimum and thus there is no excess by which a harvest under Section 8388.5 of the Fish and Game Code could be allowed. (17pp.)

Item Type: Monograph or Serial Issue
Title: Status of Pacific Mackerel spawning population, 1973
Personal Creator/Author:
CreatorsEmail
Frey, Herbert W.
Knaggs, Eric H.
Series Name: Marine Resources Administrative Report
Number: 73-7
Date: 1973
Publisher: California Department of Fish and Game, Marine Resources Region
Place of Publication: Long Beach, CA
Issuing Agency: California Department of Fish and Game
Uncontrolled Keywords: Pacific mackerel; Scomber japonicus; California; tagging; spawning populations
Subjects: Management
Fisheries
Item ID: 140
Depositing User: Joan Parker
Date Deposited: 16 Aug 2007 19:44
Last Modified: 29 Sep 2011 22:32
URI: http://aquaticcommons.org/id/eprint/140

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