Local Competition, Inbreeding, and the Evolution of Sex-Biased Dispersal.

Détails

ID Serval
serval:BIB_4EAF544A21B6
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Local Competition, Inbreeding, and the Evolution of Sex-Biased Dispersal.
Périodique
American Naturalist
Auteur(s)
Perrin N., Mazalov V.
ISSN
1537-5323[electronic], 0003-0147[linking]
Statut éditorial
Publié
Date de publication
2000
Volume
155
Numéro
1
Pages
116-127
Langue
anglais
Notes
Publication types: JOURNAL ARTICLE Publication Status: ppublish
Résumé
Using game theory, we developed a kin-selection model to investigate the consequences of local competition and inbreeding depression on the evolution of natal dispersal. Mating systems have the potential to favor strong sex biases in dispersal because sex differences in potential reproductive success affect the balance between local resource competition and local mate competition. No bias is expected when local competition equally affects males and females, as happens in monogamous systems and also in polygynous or promiscuous ones as long as female fitness is limited by extrinsic factors (breeding resources). In contrast, a male-biased dispersal is predicted when local mate competition exceeds local resource competition, as happens under polygyny/promiscuity when female fitness is limited by intrinsic factors (maximal rate of processing resources rather than resources themselves). This bias is reinforced by among-sex interactions: female philopatry enhances breeding opportunities for related males, while male dispersal decreases the chances that related females will inbreed. These results meet empirical patterns in mammals: polygynous/promiscuous species usually display a male-biased dispersal, while both sexes disperse in monogamous species. A parallel is drawn with sex-ratio theory, which also predicts biases toward the sex that suffers less from local competition. Optimal sex ratios and optimal sex-specific dispersal show mutual dependence, which argues for the development of coevolution models.
Mots-clé
ocal mate competition, local resource competition, mating systems, potential reproductive rate, kin selection
Pubmed
Web of science
Création de la notice
24/01/2008 17:54
Dernière modification de la notice
20/08/2019 14:04
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