Sizing up your enemy: individual predation vulnerability predicts migratory probability

Skov, Christian; Baktoft, Henrik; Brodersen, Jakob; Bronmark, Christer; Chapman, Ben B.; Hansson, Lars-Anders; Nilsson, P. Anders (2011). Sizing up your enemy: individual predation vulnerability predicts migratory probability. Proceedings of the Royal Society. Series B - biological sciences, 278(1710), pp. 1414-1418. Royal Society of London 10.1098/rspb.2010.2035

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Partial migration, in which a fraction of a population migrate and the rest remain resident, occurs in an extensive range of species and can have powerful ecological consequences. The question of what drives differences in individual migratory tendency is a contentious one. It has been shown that the timing of partial migration is based upon a trade-off between seasonal fluctuations in predation risk and growth potential. Phenotypic variation in either individual predation risk or growth potential should thus mediate the 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 for the importance of one component of this model—individual predation risk—in predicting partial migration in wild populations of bream Abramis brama, a freshwater fish. Smaller, high-risk individuals migrate with a higher probability than larger, low-risk individuals, and we suggest that predation risk maintains size-dependent partial migration in this system.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE)
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Aquatic Ecology

UniBE Contributor:

Brodersen, Jakob

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 590 Animals (Zoology)

ISSN:

0962-8452

Publisher:

Royal Society of London

Language:

English

Submitter:

Marcel Häsler

Date Deposited:

05 Sep 2014 16:04

Last Modified:

06 Dec 2014 10:58

Publisher DOI:

10.1098/rspb.2010.2035

Uncontrolled Keywords:

partial migration, predation risk, phenotypic variation, Abramis brama, behavioural polymorphism

BORIS DOI:

10.7892/boris.49053

URI:

https://boris.unibe.ch/id/eprint/49053

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