Multi species and single-species models of fish population dynamics comparing parameter estimates

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Multi species and single-species models of fish population dynamics comparing parameter estimates

This study highlights the need to incorporate both ecological and economic interactions that occur between species in an ecosystem.The probability that the northern snakehead population will increase and harm the native fauna is considerable.Our elasticity and prognostic analyses showed that intensive control efforts immediately prior to spawning and/or juvenile-dispersal periods would be more effective (and probably require less effort) than year-round control efforts.The author would like to thank Lars Olson, Richard Just, Ted Mc Connell, Doug Lipton, Wallace Oates, Erik Lichtenberg, Ron Felthoven, Michael Dalton, Benjamin Fissel, and participants at the 2010 International Institute for Fisheries Economics and Trade Biennial Meeting, 2010 Western Groundfish Conference, and the North American Association of Fisheries Economists Forum 2009.The author would also like to thank the National Marine Fisheries Service and National Sea Grant for providing fellowship funding that supported this research.

Multi species and single-species models of fish population dynamics comparing parameter estimates

Single-species management of multi-species fisheries ignores ecological interactions in addition to important economic interactions to the detriment of the health of the ecosystem, the stocks of fish species, and fishery profits.This study maximizes the net present value from a multi-species fishery where species interact ecologically in the ecosystem, and economically through vessels’ multi-product harvesting technology, switching gear types, and interactions in output markets.We gathered key biological information on northern snakehead natural mortality, maturity and recruitment in its native Asian environment.We compared the model performance with and without hierarchy of parameters.Below are the most common reasons: This site uses cookies to improve performance by remembering that you are logged in when you go from page to page.

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