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A model for estimating fish population and optimal fishing effort in lakes and rivers

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Author Info

  • N. Ben David
  • U. Benzion
  • E. Ofir
  • E. Spanier

Abstract

We developed a model for estimating the fish population for various species in lakes and rivers. Our estimation focuses, in its first step, on fish species that breed outside the lake. Using the annual outside supply of fingerlings, natural survival rate and reported amounts of fish caught, we estimated fish stock. Given the estimated stock for fish bred outside the lake, we can evaluate the catch rate. Assuming equal catch rates for other species, and given the amount caught for each species, we are able to evaluate each species stock. Using the proposed technique, we evaluated various species stocks in the Sea of Galilee (Lake Kinneret) in Israel. Using our suggested technique for evaluating fish stock, we calculated the optimal effort of fishing needed for maximizing steady state profit of the fishers.

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File URL: http://hdl.handle.net/10.1080/00036846.2010.537643
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Bibliographic Info

Article provided by Taylor & Francis Journals in its journal Applied Economics.

Volume (Year): 44 (2012)
Issue (Month): 9 (March)
Pages: 1159-1168

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Handle: RePEc:taf:applec:44:y:2012:i:9:p:1159-1168

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