Predation risk as a driving force for phenotypic assortment: a cross-population comparison

Croft, D.P., Darden, S. K. and Ruxton, G.D. (2009) Predation risk as a driving force for phenotypic assortment: a cross-population comparison. Proceedings of the Royal Society of London Series B: Biological Sciences, 276(1663), pp. 1899-1904. (doi: 10.1098/rspb.2008.1928)

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Publisher's URL: http://dx.doi.org/10.1098/rspb.2008.1928

Abstract

Frequency-dependent predation has been proposed as a general mechanism driving the phenotypic assortment of social groups via the 'oddity effect', which occurs when the presence of odd individuals in a group allows a predator to fixate on a single prey item, increasing the predator's attack-to-kill ratio. However, the generality of the oddity effect has been debated and, previously, there has not been an ecological assessment of the role of predation risk in driving the phenotypic assortment of social groups. Here, we compare the levels of body length assortment of social groups between populations of the Trinidadian guppy (<i>Poecilia reticulata</i>) that experience differences in predation risk. As predicted by the oddity effect hypothesis, we observe phenotypic assortment by body length to be greater under high predation risk. However, we found that a number of low-predation populations were also significantly assorted by body length, suggesting that other mechanisms may have a role to play

Item Type:Articles
Keywords:confusion effect, frequency-dependent selection, guppy, oddity effect, Poecilia reticulata
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Ruxton, Professor Graeme
Authors: Croft, D.P., Darden, S. K., and Ruxton, G.D.
Subjects:Q Science > QL Zoology
Q Science > QH Natural history > QH301 Biology
College/School:College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine
Journal Name:Proceedings of the Royal Society of London Series B: Biological Sciences
ISSN:0962-8452
ISSN (Online):1471-2954

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