کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4544646 1327206 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Linkage between fishers’ foraging, market and fish stocks density: Examples from some North Sea fisheries
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
پیش نمایش صفحه اول مقاله
Linkage between fishers’ foraging, market and fish stocks density: Examples from some North Sea fisheries
چکیده انگلیسی

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 μ, for both fleets. The properties of fishers’ foraging were further investigated for the Dutch fleet using time series analysis. Optimal foraging was found with μ = 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 μ and the other explanatory variables considered (fish prices and fishing effort).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fisheries Research - Volume 83, Issue 1, January 2007, Pages 33–43
نویسندگان
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