Orcutt, Harold G. and Tasto, Robert N. and Wild, Paul W. and Haugen, Charles W. and Ebert, Earl E.
Dungeness crab research program: Report for the Year 1976.
Menlo Park, CA,
California Department of Fish and Game, Marine Resources Region,
(Marine Resources Administrative Report, 76-15)
All larval stages of the 1976 year class, with the exception of the 5th zoeal stage, were found in Gu1f waters January through March. The first post-larval stage was collected in San Pablo Bay in May. Fifty percent of 1976 year class crabs entered the Bay complex as compared to nearly 80% in 1975. The 1976 year class appears relatively weak. No electrophoretic polymorphism was found in Cancer magister to be of value in Dungeness crab population determinations.
Multi-variate correlations comparing crab landings with an
array of oceanographic parameters and the crab density dependent factor were computer-run for both northern and
central California. The most significant correlating factors at the time late stage larvae prevail were sea level and atmospheric pressure for central California and, for northern California, the density dependent factor and sea
surface temperature. Female crabs held at controlled temperatures indicated gonad maturation and spawning
may be induced by increased temperature. Analyses of crab
tissues revealed burdens of petroleum hydrocarbons, silver,
selenium, cadmium, and PCB's higher in central California
crabs, while DDE was found in higher amounts in northern
California crab tissue.
Thru-flow culture systems were developed which should yield about 163 megalopae of Dungeness crabs in 63 days from 1,200 laboratory hatched zoeae.(46pp.)
Monograph or Serial Issue
||Dungeness crab research program: Report for the Year 1976
|Orcutt, Harold G.|
|Tasto, Robert N.|
|Wild, Paul W.|
|Haugen, Charles W.|
|Ebert, Earl E.|
||Marine Resources Administrative Report
||California Department of Fish and Game, Marine Resources Region
|Place of Publication:
||Menlo Park, CA
||California Department of Fish and Game
||Dungeness crab; California; Cancer magister; fisheries
||31 Aug 2007 11:46
||29 Sep 2011 22:23
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