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bio-economic modeling

Aquatic Living Resources (1)

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Linking catchability and fisher behaviour under effort management
Hans J.A.E. van Oostenbrugge, Jeff P. Powell, Jos P.G. Smit, Jan-Jaap Poos, Sarah B.M. Kraak, Erik F.C. Buisman
Journal:

Aquatic Living Resources / Volume 21 / Issue 3 / July 2008

Published online by Cambridge University Press:

26 July 2008, pp. 265-273

Print publication:

July 2008
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Catchability is crucial for the economic performance of fisheries and their management. However, in many bio-economic simulation models it is assumed to be either constant or it is largely ignored, despite the fact that it is known to vary due to technical, environmental and behavioral factors. Such variation can cause the relationship between effort and fishing mortality to be nonlinear. This paper provides evidence for the possibility of nonlinear optimizing behavior from the Dutch beam trawl fishery, provides a methodology for estimating the curvature of the resulting relation, and a simple way of implementing these processes within a bio-economic model. Moreover, it shows the influence of a nonlinear relationship between effort and fishing mortality in a model of effort management (EU long-term flatfish management plan).