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Economic impacts of changes in fish population dynamics: the role of the fishermen’s harvesting strategies

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Author Info
P. Michael Link
Uwe A. Schneider
Richard S.J. Tol () (Economic and Social Research Institute, Dublin)

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Abstract

Using a bioeconomic model of the cod (Gadus morhua) and capelin (Mallotus villosus) fisheries of the Barents Sea, this study assesses the role of the fishermen’s behavior in reducing or intensifying the effects on the stocks caused by altered population dynamics. The analysis focuses on the economic development of the fisheries employing a profit-maximizing harvesting strategy over a given number of fishing periods. The scenarios assessed cover a time period of 100 years with sudden changes of the productivity of both species occurring at the midpoint of each simulation. Stock sizes and landings of fish are determined for each fishing period, and the net present values of profits over periods of interest prior to and following the change in population dynamics are calculated. Results show that if the profit-maximizing harvesting strategy is based on a short optimization period, the fleets with the higher efficiency are generally favored. If the strategy is based on an optimization over two or more fishing periods, fishing activities may be deferred to allow for stock regrowth. In such cases, smaller and less cost-intensive vessels are preferred. A reduction of either the productivity or the carrying capacities of the two species has little impact on the fisheries if the change is fairly small. A substantial reduction of either quantity has a lasting negative economic impact which mainly manifests itself in a severely reduced profitability of mainly the cod fishery.

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File URL: http://www.fnu.zmaw.de/fileadmin/fnu-files/publication/working-papers/Link_Working_Paper_FNU-50.pdf
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File Function: First version, 2004
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Publisher Info
Paper provided by Research unit Sustainability and Global Change, Hamburg University in its series Working Papers with number FNU-50.

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Length: 27 pages
Date of creation: Nov 2004
Date of revision: Nov 2004
Handle: RePEc:sgc:wpaper:50

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Related research
Keywords: bioeconomic modeling Barents Sea cod capelin population dynamics harvesting strategy

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Find related papers by JEL classification:
Q22 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Renewable Resources and Conservation - - - Fishery

This item is featured on the following reading lists:

  1. Socio-economics of Fisheries and Aquaculture
Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)
  1. Jacqueline M. Hamilton, 2005. "Coastal landscape and the hedonic price of accommodation," Working Papers FNU-91, Research unit Sustainability and Global Change, Hamburg University, revised Sep 2005. [Downloadable!]
    Other versions:
  2. Katrin Rehdanz & Richard S.J. Tol & Patrick Wetzel, 2005. "Ocean Carbon Sinks And International Climate Policy," Working Papers FNU-60, Research unit Sustainability and Global Change, Hamburg University, revised Feb 2005. [Downloadable!]
    Other versions:
  3. David J. Maddison & Katrin Rehdanz, 2004. "The Amenity Value Of Climate To Households In Germany," Working Papers FNU-39, Research unit Sustainability and Global Change, Hamburg University, revised Jan 2005. [Downloadable!]
  4. Richard S.J. Tol, 2005. "Europe’S Long Term Climate Target: A Critical Evaluation," Working Papers FNU-92, Research unit Sustainability and Global Change, Hamburg University, revised Sep 2005. [Downloadable!]
    Other versions:
  5. Richard S.J. Tol, 2006. "Integrated Assessment Modelling," Working Papers FNU-102, Research unit Sustainability and Global Change, Hamburg University, revised May 2006. [Downloadable!]
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