Economic impacts of changes in the population dynamics of fish on the fisheries of the Barents Sea

Link, Michael and Tol, Richard (2006) Economic impacts of changes in the population dynamics of fish on the fisheries of the Barents Sea. ICES Journal of Marine Science, 63 (4). pp. 611-625. ISSN 1054-3139

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Abstract

A bioeconomic simulation model of the two interacting fish species cod (Gadus morhua) and capelin (Mallotus villosus) and their fisheries is presented and applied to assess the consequences of changes in the population dynamics of these important fish stocks in the Barents Sea. In each scenario, the population dynamics of the fish species are changed by reducing the reproduction-induced productivities and/or the carrying capacities. Stock sizes and landings of fish are calculated for each fishing period, and the net present values of profits from fishing are determined for time periods prior to and after the change in population dynamics. Results show that reduced growth rates or carrying capacities lead to lower stock levels and consequently to smaller catches. There is only a small short-term economic impact on the fisheries, but the long-term consequences are pronounced. In some cases, greater fishing activity in the first few years after the change in population dynamics causes harvests to remain stable despite diminishing stock sizes. This stabilizes the returns from fishing in the short term, but veils the apparent negative long-term impact on the fisheries resulting from adversely affected stock dynamics. © 2006 International Council for the Exploration of the Sea.

Item Type: Article
Schools and Departments: School of Business, Management and Economics > Economics
Subjects: H Social Sciences > HB Economic theory. Demography
Q Science > QL Zoology > QL0001 General Including geographical distribution
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Depositing User: Richard Tol
Date Deposited: 19 Apr 2012 13:07
Last Modified: 30 Nov 2012 17:12
URI: http://sro.sussex.ac.uk/id/eprint/38337
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