Sizing up your enemy: individual predation vulnerability predicts migratory probability
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
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.
partial migration, predation risk, phenotypic variation, Abramis brama, behavioural polymorphism
Research subject Biology
IdentifiersURN: urn:nbn:se:kau:diva-30338DOI: 10.1098/rspb.2010.2035ISI: 000288851800018OAI: oai:DiVA.org:kau-30338DiVA: diva2:667955