Budding dispersal and the sex ratio

A. Gardner*, A. Arce, J. Alpedrinha

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

There is much interest in understanding how population demography impacts upon social evolution. Here, we consider the impact of rate and pattern of dispersal upon a classic social evolutionary trait - the sex ratio. We recover existing analytical results for individual dispersal, and we extend these to allow for budding dispersal. In particular, while a cancelling of relatedness and kin competition effects means that the sex ratio is unaffected by the rate of individual dispersal, we find that a decoupling of relatedness and kin competition means that budding dispersal favours increasingly female-biased sex ratios. More generally, our analysis illustrates the relative ease with which biological problems involving class structure can be solved using a kin selection approach to social evolution theory.

Original languageEnglish
Pages (from-to)1036-1045
Number of pages10
JournalJournal of Evolutionary Biology
Volume22
Issue number5
DOIs
Publication statusPublished - May 2009

Keywords

  • class structure
  • group selection
  • inclusive fitness
  • kin selection
  • local mate competition
  • relatedness
  • reproductive value
  • scale of competition
  • sex allocation
  • viscous population
  • HIERARCHICAL SELECTION THEORY
  • KIN SELECTION
  • INCLUSIVE FITNESS
  • EVOLUTIONARY STABILITY
  • STRUCTURED POPULATIONS
  • VISCOUS POPULATIONS
  • SOCIAL SEMANTICS
  • ALTRUISM
  • DEMOGRAPHY
  • MODEL

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