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Modelling the evolutionary effects of a coastal marine reserve on different ecological guilds of fish

Published online by Cambridge University Press:  01 September 2010

Tanja Miethe ,
Jonathan W. Pitchford  and
Calvin Dytham
Tanja Miethe*
Affiliation:
Department of Biology, University of York, PO Box 373, YO10 5YW, UK York Centre for Complex Systems Analysis, University of York, PO Box 373, YO10 5YW, UK
Jonathan W. Pitchford
Affiliation:
Department of Biology, University of York, PO Box 373, YO10 5YW, UK York Centre for Complex Systems Analysis, University of York, PO Box 373, YO10 5YW, UK
Calvin Dytham
Affiliation:
Department of Biology, University of York, PO Box 373, YO10 5YW, UK
*
Correspondence should be addressed to: T. Miethe, Max Planck Institute for Demographic Research, Konrad-Zuse-Strasse 1, 18057 Rostock, Germany email: [email protected]
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Abstract

Marine reserves are used as a management tool to ensure sustainability of fish stocks. Using an individual-based model, we compare the evolutionary effect of a reserve located on a nursery ground, spawning ground, feeding ground, or in a year-round habitat for sedentary species. We model the evolution of life-history traits, specifically size at maturation and site fidelity. Within species, individuals will differ in the time spent within a reserve depending on their patterns of movement and migration. We predict that the evolutionary effect of fishing depends not only on the survival probability but also on the life-history stages primarily affected by high harvest mortality. Protection against evolution to small maturation size is most effective where a reserve protects a sedentary population or protects the feeding grounds of a population. We also find that protection of the feeding ground of an anadromous stock such as Atlantic salmon may lead to local adaptation enhanced by evolution of higher site fidelity, similar to protection of a sedentary species.

Keywords

fisheries-induced evolutionhomingmarine protected areaoverfishingsize selectivityspillover
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 91 , Special Issue 6: Fish Ecology , September 2011 , pp. 1369 - 1380
Copyright
Copyright © Marine Biological Association of the United Kingdom 2010

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