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Sex-specific spatio-temporal variability in reproductive success promotes the evolution of sex-biased dispersal

Please always quote using this URN: urn:nbn:de:bvb:20-opus-48711
  • Abstract: Inbreeding depression, asymmetries in costs or benefits of dispersal, and the mating system have been identified as potential factors underlying the evolution of sex-biased dispersal. We use individual-based simulations to explore how the mating system and demographic stochasticity influence the evolution of sex-specific dispersal in a metapopulation with females competing over breeding sites, and males over mating opportunities. Comparison of simulation results for random mating with those for a harem system (locally, a single maleAbstract: Inbreeding depression, asymmetries in costs or benefits of dispersal, and the mating system have been identified as potential factors underlying the evolution of sex-biased dispersal. We use individual-based simulations to explore how the mating system and demographic stochasticity influence the evolution of sex-specific dispersal in a metapopulation with females competing over breeding sites, and males over mating opportunities. Comparison of simulation results for random mating with those for a harem system (locally, a single male sires all offspring) reveal that even extreme variance in local male reproductive success (extreme male competition) does not induce male-biased dispersal. The latter evolves if the between-parch variance in reproductive success is larger for males than females. This can emerge due to demographic stochasticity if the habitat patches are small. More generally, members of a group of individuals experiencing higher spatio-temporal variance in fitness expectations may evolve to disperse with greater probability than others.show moreshow less

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Metadaten
Author: Andreas Gros, Hans Joachim Poethke, Thomas Hovestadt
URN:urn:nbn:de:bvb:20-opus-48711
Document Type:Journal article
Faculties:Fakultät für Biologie / Theodor-Boveri-Institut für Biowissenschaften
Language:English
Year of Completion:2009
Source:In: Theoretical Population Biology (2009) 76, 1, 13-18. - http://dx.doi.org/10.1016/j.tpb.2009.03.002
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie
Tag:demographic stochasticity; individual-based simulation; metapopulation; sex-biased dispersal; sex-specific competition
Release Date:2010/06/23