Frey, Herbert W. and Knaggs, Eric H.
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)
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.)
Monograph or Serial issue
||Status of Pacific Mackerel spawning population, 1973
|Frey, Herbert W.|
|Knaggs, Eric H.|
||Marine Resources Administrative Report
||California Department of Fish and Game, Marine Resources Region
|Place of Publication:
||Long Beach, CA
||California Department of Fish and Game
||Pacific mackerel; Scomber japonicus; California; tagging; spawning populations
||16 Aug 2007 19:44
||29 Sep 2011 22:32
Actions (login required)