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

P.M. Link, R.S.J. Tol

Research output: Contribution to JournalArticleAcademicpeer-review

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.
Original languageEnglish
Pages (from-to)611-625
Number of pages14
JournalICES Journal of Marine Science
Volume63
Issue number4
DOIs
Publication statusPublished - 2006

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Barents Sea
economic impact
population dynamics
fishing
fishery
fisheries
Mallotus villosus
fish
carrying capacity
bioeconomic models
cod (fish)
Gadus morhua
profits and margins
simulation models
productivity
sea
simulation

Cite this

@article{37198e5e9eef43dbbddb0b0116dd2335,
title = "Economic impacts of changes in population dynamics of fish on the fisheries in the Barents Sea",
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. {\circledC} 2006 International Council for the Exploration of the Sea.",
author = "P.M. Link and R.S.J. Tol",
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language = "English",
volume = "63",
pages = "611--625",
journal = "ICES Journal of Marine Science",
issn = "1054-3139",
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Economic impacts of changes in population dynamics of fish on the fisheries in the Barents Sea. / Link, P.M.; Tol, R.S.J.

In: ICES Journal of Marine Science, Vol. 63, No. 4, 2006, p. 611-625.

Research output: Contribution to JournalArticleAcademicpeer-review

TY - JOUR

T1 - Economic impacts of changes in population dynamics of fish on the fisheries in the Barents Sea

AU - Link, P.M.

AU - Tol, R.S.J.

PY - 2006

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N2 - 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.

AB - 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.

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