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Linking catchability and fisher behaviour under effort management

Published online by Cambridge University Press:  26 July 2008

Hans J.A.E. van Oostenbrugge ,
Jeff P. Powell ,
Jos P.G. Smit ,
Jan-Jaap Poos ,
Sarah B.M. Kraak  and
Erik F.C. Buisman
Hans J.A.E. van Oostenbrugge
Affiliation:
LEI (Agricultural Economics Research Institute), Fisheries Unit, PO Box 29703, 2502 LS The Hague, The Netherlands
Jeff P. Powell
Affiliation:
LEI (Agricultural Economics Research Institute), Fisheries Unit, PO Box 29703, 2502 LS The Hague, The Netherlands
Jos P.G. Smit
Affiliation:
LEI (Agricultural Economics Research Institute), Fisheries Unit, PO Box 29703, 2502 LS The Hague, The Netherlands
Jan-Jaap Poos
Affiliation:
Wageningen IMARES, Wageningen UR, PO Box 68, 1970 AB IJmuiden, The Netherlands
Sarah B.M. Kraak
Affiliation:
Wageningen IMARES, Wageningen UR, PO Box 68, 1970 AB IJmuiden, The Netherlands
Erik F.C. Buisman
Affiliation:
LEI (Agricultural Economics Research Institute), Fisheries Unit, PO Box 29703, 2502 LS The Hague, The Netherlands
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Abstract

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).

Keywords

Non-linearityBio-economic modelingFLR frameworkNorth Sea flatfish fishery
Type
Research Article
Information
Aquatic Living Resources , Volume 21 , Issue 3: Special Issue (Advances in Fisheries Analysis and Modelling – Reversible and Irreversible Changes in Fish Resources and their usage) , July 2008 , pp. 265 - 273
Copyright
© EDP Sciences, IFREMER, IRD, 2008

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