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Evolution of sex-biased dispersal: The role of sex-specific dispersal costs, demographic stochasticity, and inbreeding

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  • Gros, Andreas
  • Hovestadt, Thomas
  • Poethke, Hans Joachim

Abstract

Inbreeding avoidance and asymmetric competition over resources have both been identified as factors favoring the evolution of sex-biased dispersal. It has also been recognized that sex-specific costs of dispersal would select for sex-biased dispersal, but there is little quantitative information on this aspect. In this paper we explore (i) the quantitative relationship between cost-asymmetry and a bias in dispersal, (ii) the influence of demographic stochasticity on this effect, and (iii) how inbreeding and cost-asymmetry interact in their effect on sex-specific dispersal. We adjust an existing analytical model to account for sex-specific costs of dispersal. Based on numerical calculations we predict a severe bias in dispersal already for small differences in dispersal costs. We corroborate these predictions in individual-based simulations, but show that demographic stochasticity generally leads to more balanced dispersal. In combination with inbreeding, cost asymmetries will usually determine which of the two sexes becomes the more dispersive.

Suggested Citation

  • Gros, Andreas & Hovestadt, Thomas & Poethke, Hans Joachim, 2008. "Evolution of sex-biased dispersal: The role of sex-specific dispersal costs, demographic stochasticity, and inbreeding," Ecological Modelling, Elsevier, vol. 219(1), pages 226-233.
    • Handle: RePEc:eee:ecomod:v:219:y:2008:i:1:p:226-233
    DOI: 10.1016/j.ecolmodel.2008.08.014
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    References listed on IDEAS

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    1. Cecilia Kullberg & David C. Houston & Neil B. Metcalfe, 2002. "Impaired flight ability--a cost of reproduction in female blue tits," Behavioral Ecology, International Society for Behavioral Ecology, vol. 13(4), pages 575-579, July.
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    Cited by:

    1. Chaianunporn, Thotsapol & Hovestadt, Thomas, 2012. "Concurrent evolution of random dispersal and habitat niche width in host-parasitoid systems," Ecological Modelling, Elsevier, vol. 247(C), pages 241-250.
    2. Gros, Andreas & Poethke, Hans Joachim & Hovestadt, Thomas, 2009. "Sex-specific spatio-temporal variability in reproductive success promotes the evolution of sex-biased dispersal," Theoretical Population Biology, Elsevier, vol. 76(1), pages 13-18.

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