Inbreeding avoidance through kin recognition: choosy females boost male dispersal.
Details
Download: 03ChoosyFemales.pdf (509.71 [Ko])
State: Public
Version: author
License: Not specified
State: Public
Version: author
License: Not specified
Serval ID
serval:BIB_00B8BDB73912
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Inbreeding avoidance through kin recognition: choosy females boost male dispersal.
Journal
The American Naturalist
Publication state
Published
Issued date
2003
Peer-reviewed
Oui
Volume
162
Number
5
Pages
638-652
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't Publication Status: ppublish
Abstract
Inbreeding avoidance is predicted to induce sex biases in dispersal. But which sex should disperse? In polygynous species, females pay higher costs to inbreeding and thus might be expected to disperse more, but empirical evidence consistently reveals male biases. Here, we show that theoretical expectations change drastically if females are allowed to avoid inbreeding via kin recognition. At high inbreeding loads, females should prefer immigrants over residents, thereby boosting male dispersal. At lower inbreeding loads, by contrast, inclusive fitness benefits should induce females to prefer relatives, thereby promoting male philopatry. This result points to disruptive effects of sexual selection. The inbreeding load that females are ready to accept is surprisingly high. In absence of search costs, females should prefer related partners as long as delta<r/(1+r) where r is relatedness and delta is the fecundity loss relative to an outbred mating. This amounts to fitness losses up to one-fifth for a half-sib mating and one-third for a full-sib mating, which lie in the upper range of inbreeding depression values currently reported in natural populations. The observation of active inbreeding avoidance in a polygynous species thus suggests that inbreeding depression exceeds this threshold in the species under scrutiny or that inbred matings at least partly forfeit other mating opportunities for males. Our model also shows that female choosiness should decline rapidly with search costs, stemming from, for example, reproductive delays. Species under strong time constraints on reproduction should thus be tolerant of inbreeding.
Keywords
Animals, Female, Inbreeding, Male, Models, Biological, Movement/physiology, Population Dynamics, Recognition (Psychology)/physiology, Reproduction/physiology, Selection, Genetic, Time Factors
Pubmed
Web of science
Create date
24/01/2008 18:53
Last modification date
09/11/2019 8:08