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Description:The most recent "Report on the Status of Fisheries" published by the National Marine Fisheries Service indicates that 98 fish stocks nationwide are considered overfished. Fisheries managers have the responsibility to properly manage these fish stocks for the long-term benefit of both the fish stocks and the human population. Management decisions are based on the various methods of fish stock assessment. Used properly, these methods allow overfished stocks to rebuild and ensure harvest pressure does not exceed sustainable levels. A stock assessment report typically includes the following sections: (1) Description of the fisheries that interact with the stock and the presentation of fishery-dependent data (landings, effort, etc.); (2) Results of research surveys that provide fishery-independent data on abundance and samples for biological analysis; and (3) Life history characteristics of the resource including natural mortality, growth, and maturity. This manual was based on material presented during several stock assessment training courses sponsored by the Atlantic States Marine Fisheries Commission, and supplemented by lecture notes of Dr. Joseph T. DeAlteris. It is intended to be used as a reference for stock assessment biologists and students, and as a course handbook for future ASMFC stock assessment training courses. Part II of the manual (scheduled to be printed in Fall 2000) covers several more technical, advanced stock assessment models. Chapters in Part I are devoted to an overview, review of mathematics and biostatistics, growth, mortality, fishing gear, yields, production models, stock and recruitment.
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Sea Grant Document Number:RIU-H-00-001
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Rights Information:Public Domain
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