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Provedor de dados:  ArchiMer
País:  France
Título:  Linkage between fishers' foraging, market and fish stocks density: Examples from some North Sea fisheries
Autores:  Marchal, Paul
Poos, Jan-jaap
Quirijns, Floor
Data:  2007
Ano:  2007
Palavras-chave:  Haul by haul data
Foraging
Fishing effort
Levy flights
Fleet behavior
Resumo:  This study has investigated some properties of fishermen's foraging, using Levy flights theory. The case studies examined were a selection of North Sea Dutch and French vessels, for which catch and effort data were collected on a haul-by-haul basis. Foraging behavior could reasonably be represented by a Levy flight process, characterized by an exponentiation factor mu, for both fleets. The properties of fishers' foraging were further investigated for the Dutch fleet using time series analysis. Optimal foraging was found with mu = 1.5, suggesting a slow recovery dynamics of the stocks being harvested. Efficient foraging led to high value per unit effort, while the knowledge of fishing grounds with high stock density is shown to increase foraging efficiency in the short-term future. Only marginal correlations could be found between mu and the other explanatory variables considered (fish prices and fishing effort). (c) 2006 Elsevier B.V. All rights reserved.
Tipo:  Text
Idioma:  Inglês
Identificador:  http://archimer.ifremer.fr/doc/2007/publication-2314.pdf

DOI:10.1016/j.fishres.2006.08.025
Editor:  Elsevier
Relação:  http://archimer.ifremer.fr/doc/00000/2314/
Formato:  application/pdf
Fonte:  Fisheries Research (0165-7836) (Elsevier), 2007 , Vol. 83 , N. 1 , P. 33-43
Direitos:  2006 Elsevier
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