Altruism, dispersal, and phenotype-matching kin recognition.

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Serval ID
serval:BIB_6A43F762AD01
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Altruism, dispersal, and phenotype-matching kin recognition.
Journal
American Naturalist
Author(s)
Lehmann L., Perrin N.
ISSN
1537-5323[electronic], 0003-0147[linking]
Publication state
Published
Issued date
2002
Volume
159
Number
5
Pages
451-468
Language
english
Notes
Publication types: Journal Article Publication Status: ppublish
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 constraints. The emergence of sociality thus can be facilitated by enhancing e, which we argue is the main purpose of cue standardization within groups, as observed in many social insects, birds, and mammals, including humans.
Keywords
game theory, heritability, inclusive fitness, kin competition, quantitative genetics, social evolution
Pubmed
Web of science
Open Access
Yes
Create date
19/11/2007 10:31
Last modification date
20/08/2019 14:25
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