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Sizing up your enemy: individual predation vulnerability predicts migratory probability
National Institute of Aquatic Resources, Technical University of Denmark (DTU).
National Institute of Aquatic Resources, Technical University of Denmark (DTU).
Department of Ecology and Evolutionary Ecology, Yale University, New Haven, USA.
Department of Biology, Lund University.
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2011 (English)In: Proceedings of the Royal Society of London. Biological Sciences, ISSN 0962-8452, E-ISSN 1471-2954, Vol. 278, 1414-1418 p.Article in journal (Refereed) Published
Abstract [en]

Partial migration, in which a fraction of a population migrate and the rest remain resident, occurs in anextensive range of species and can have powerful ecological consequences. The question of what drivesdifferences in individual migratory tendency is a contentious one. It has been shown that the timing ofpartial migration is based upon a trade-off between seasonal fluctuations in predation risk and growthpotential. Phenotypic variation in either individual predation risk or growth potential should thus mediatethe strength of the trade-off and ultimately predict patterns of partial migration at the individual level (i.e.which individuals migrate and which remain resident). We provide cross-population empirical support forthe importance of one component of this model—individual predation risk—in predicting partialmigration in wild populations of bream Abramis brama, a freshwater fish. Smaller, high-risk individualsmigrate with a higher probability than larger, low-risk individuals, and we suggest that predation riskmaintains size-dependent partial migration in this system.

Place, publisher, year, edition, pages
2011. Vol. 278, 1414-1418 p.
Keyword [en]
partial migration, predation risk, phenotypic variation, Abramis brama, behavioural polymorphism
National Category
Biological Sciences
Research subject
Biology
Identifiers
URN: urn:nbn:se:kau:diva-30338DOI: 10.1098/rspb.2010.2035ISI: 000288851800018OAI: oai:DiVA.org:kau-30338DiVA: diva2:667955
Available from: 2013-11-28 Created: 2013-11-28 Last updated: 2016-10-13Bibliographically approved

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Nilsson, P. Anders
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