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An Ecological-Economic Model on the Effects of Interactions between Escaped Farmed and Wild Salmon (Salmo salar)

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  • Anders Skonhoft

    ()
    (Department of Economics, Norwegian University of Science and Technology)

  • Yajie Liu
  • Ola H. Diserud
  • Kjetil Hindar

Abstract

This paper explores the ecological and economic impacts of interactions between escaped farmed and wild Atlantic salmon (Salmo salar, Salmonidae) over generations. An age- and stage-structured bioeconomic model is developed. The biological part of the model includes age-specific life history traits such as survival rates, fecundity, and spawning successes for wild and escaped farmed salmon, as well as their hybrids, while the economic part takes account of use and non-use values of fish stock. The model is simulated under three scenarios using data from the Atlantic salmon fishery and salmon farming in Norway. The social welfare are derived from harvest and wild salmon while the economic benefits of fishing comprise both sea and river fisheries. The results reveal that the wild salmon stock is gradually replaced by salmon with farmed origin, while the total social welfare and economic benefit decline, although not at the same rate as the wild salmon stock.

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File URL: http://www.svt.ntnu.no/iso/WP/2011/12_ecological.pdf
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Bibliographic Info

Paper provided by Department of Economics, Norwegian University of Science and Technology in its series Working Paper Series with number 12111.

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Length: 36 pages
Date of creation: 07 Oct 2011
Date of revision:
Handle: RePEc:nst:samfok:12111

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  1. Guttormsen, Atle G. & Kristofersson, Dadi & Nævdal, Eric, 2008. "Optimal management of renewable resources with Darwinian selection induced by harvesting," Journal of Environmental Economics and Management, Elsevier, vol. 56(2), pages 167-179, September.
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