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Integrating habitat concerns into Gordon-Schaefer model

Nariné Udumyan (  Auteur correspondant ) 1, Dominique Ami (  Auteur correspondant ) 1, Pierre Cartigny 1

(22/09/2010)

In the Gordon-Schaefer model (G-S model), widely used to design fisheries management policy, only resource stock dynamic is considered and carrying capacity is constant. We propose an extension to the G-S model that incorporates the dynamics of carrying capacity as an indicator of dynamics of the marine habitats. The study yields two main findings. First, we demonstrate that habitats matter, by showing that the main outcomes of the G-S model are dramatically modified if habitats are included in the analysis. Second, through a heuristic model and simulations, we show, for the first time, that our extended model provides an appropriate framework to analyse the putative contribution of MPAs and ARs. The model presented in this article opens the way to a better understanding of the benefits of MPAs and ARs, as well as other habitat protection policies.

1 :	Groupement de Recherche en Économie Quantitative d'Aix-Marseille (GREQAM)
	Université de la Méditerranée - Aix-Marseille II – Université Paul Cézanne - Aix-Marseille III – École des Hautes Études en Sciences Sociales [EHESS] – CNRS : UMR6579

Discipline

:

Sciences de l'Homme et Société/Economies et finances

Mots-Clés : Bioeconomics – Gordon-Schaefer model – Marine habitats – Artificial reefs

halshs-00520328, version 1

http://halshs.archives-ouvertes.fr/halshs-00520328

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Contributeur : Anne Peguin-Feissolle <>

Soumis le : Mercredi 22 Septembre 2010, 21:22:54

Dernière modification le : Jeudi 23 Septembre 2010, 08:59:26