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Modelling economic response to harvest and effort control in North Sea cod fishery

Published online by Cambridge University Press:  26 July 2008

Ayoe Hoff  and
Hans Frost
Ayoe Hoff
Affiliation:
Institute of Food and Resource Economics, Faculty of Life Science, University of Copenhagen, Rolighedsvej 25, 1958 Frederiksberg C, Denmark
Hans Frost
Affiliation:
Institute of Food and Resource Economics, Faculty of Life Science, University of Copenhagen, Rolighedsvej 25, 1958 Frederiksberg C, Denmark
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Abstract

A number of European fishing fleets have been regulated through a combination of quota and effort (sea days) controls since 2004. These two regulation schemes are, however, interrelated, i.e. a given quota limit will necessarily determine the effort used and vice versa. A bioeconomic feedback model is presented which takes this causality between effort and harvest control into account, and switches back and forth between these two regulation schemes depending on which is the binding rule. The model is based on biological stock projection, and quotas are set using the Pope approximation while an economic production function is used to estimate the harvest when the effort is binding. The economic response of the fleet is modelled through a dynamic investment/disinvestment module which evaluates the change in the fleet capacity given the economic outcome of the fishery. A simple example is presented for the Danish seiners catching cod in the North Sea. The model has been constructed as part of the 6th framework project “Operational Evaluation Tools for Fisheries Management Options (EFIMAS)”.

Keywords

Combined quota and effort controlBio-economic modellingFLR (Fisheries Laboratory in language R)
Type
Research Article
Information
Aquatic Living Resources , Volume 21 , Issue 3: Special Issue (Advances in Fisheries Analysis and Modelling – Reversible and Irreversible Changes in Fish Resources and their usage) , July 2008 , pp. 259 - 264
Copyright
© EDP Sciences, IFREMER, IRD, 2008

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