Estimation of Mortality Rates in Fish Populations
- 1 July 1980
- journal article
- research article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 109 (4) , 378-386
- https://doi.org/10.1577/1548-8659(1980)109<378:eomrif>2.0.co;2
Abstract
The natural log of catch per unit of effort (CPUE) calculated for successive fish ages during the lifetime of a cohort, is related to the size of the cohort and to the fishing and natural mortality rates. After a simple linearization procedure, regressions of logeCPUE against effort and age can give estimates of natural mortality rate, catchability coefficient, and size of the cohort. The method is applied to Lake Opeongo trout data.Keywords
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