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Linking catchability and fisher behaviour under effort management
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).
Auteurs du document :
Hans J.A.E. van Oostenbrugge, Jeff P. Powell, Jos P.G. Smit, Jan-Jaap Poos, Sarah B.M. Kraak, Erik F.C. BuismanObtenir le document :
EDP SciencesMots clés :
Non-linearity, Bio-economic modeling, FLR framework, North Sea flatfish fisheryThème (issu du Text Mining) :
MOT OUTILDate :
2008-7-26Format :
text/xmlSource :
https://doi.org/10.1051/alr:2008035Langue :
AnglaisTélécharger les documents :
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https://www.documentation.eauetbiodiversite.fr/notice/linking-catchability-and-fisher-behaviour-under-effort-management0
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Ce portail, créé et géré par l'Office International de l'Eau (OiEau), est géré avec l'appui de l’Office français de la biodiversité (OFB)
Ce portail, créé et géré par l'Office International de l'Eau (OiEAU), est géré avec l'appui de l’Office français de la biodiversité (OFB)