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- W2108221251 abstract "Catchability is an important parameter in many stock assessment models because it relates an index of abundance to stock size. We review the theory and evidence for time-varying catchability, its effects on stock assessment estimates, and methods to include time-varying catchability in stock assessments. Numerous studies provide strong evidence that time-varying catchability is common in most fisheries and many fishery-independent surveys and can be caused by anthropogenic, environmental, biological, and management processes. Trends in catchability over time can cause biased estimates of stock size and fishing mortality rates in stock assessment models that do not compensate for them. Methods that use descriptive and functional relationships have been developed to incorporate time-varying catchability in stock assessment models. We recommend that the default assumption for stock assessments should be that catchability varies over time and that multiple methods of including time-varying catchability should..." @default.
- W2108221251 created "2016-06-24" @default.
- W2108221251 creator A5017540059 @default.
- W2108221251 creator A5024684992 @default.
- W2108221251 creator A5076348945 @default.
- W2108221251 creator A5081190469 @default.
- W2108221251 date "2009-11-19" @default.
- W2108221251 modified "2023-10-05" @default.
- W2108221251 title "Incorporating Time-Varying Catchability into Population Dynamic Stock Assessment Models" @default.
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