Altruism, dispersal, and phenotype-matching kin recognition

The American Naturalist
L Lehmann, Nicolas Perrin

Abstract

We investigate the coevolution between philopatry and altruism in island-model populations when kin recognition occurs through phenotype matching. In saturated environments, a good discrimination ability is a necessary prerequisite for the emergence of sociality. Discrimination decreases not only with the average phenotypic similarity between immigrants and residents (i.e., with environmental homogeneity and past gene flow) but also with the sampling variance of similarity distributions (a negative function of the number of traits sampled). Whether discrimination should rely on genetically or environmentally determined traits depends on the apportionment of phenotypic variance and, in particular, on the relative values of e (the among-group component of environmental variance) and r (the among-group component of genetic variance, which also measures relatedness among group members). If r exceeds e, highly heritable cues do better. Discrimination and altruism, however, remain low unless philopatry is enforced by ecological constraints. If e exceeds r, by contrast, nonheritable traits do better. High e values improve discrimination drastically and thus have the potential to drive sociality, even in the absence of ecological const...Continue Reading

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Citations

May 20, 2009·Proceedings of the National Academy of Sciences of the United States of America·Karl Sigmund
Jul 2, 2010·Proceedings. Biological Sciences·Rufus A Johnstone, Michael A Cant
Nov 8, 2003·BMC Evolutionary Biology·Emile Ajar
Jul 30, 2008·The American Naturalist·Rufus A Johnstone, Michael A Cant
Nov 18, 2003·The American Naturalist·Laurent Lehmann, Nicolas Perrin
Jan 6, 2016·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·António M M Rodrigues, Hanna Kokko
May 5, 2009·Trends in Ecology & Evolution·Thomas G Platt, James D Bever
Apr 26, 2008·Neuroscience Letters·Steven M PlatekShelly M Kemp
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Jan 11, 2007·Journal of Evolutionary Biology·L Lehmann
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Nov 6, 2009·The New Phytologist·Frédéric MasclauxPhilippe Reymond
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Apr 1, 2008·The Journal of Experimental Biology·Gissella M VásquezJules Silverman

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