title: Budding dispersal and the sex ratio.
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.
authors.affiliation: Institute of Evolutionary Biology, University of Edinburgh, West Mains Road, Edinburgh, UK. andy.gardner@ed.ac.uk
authors.forename: A
authors.initials: A
authors.lastname: Gardner
authors.forename: A
authors.initials: A
authors.lastname: Arce
authors.forename: J
authors.initials: J
authors.lastname: Alpedrinha
mesh_terms: D000818:Animals; D005075:Biological Evolution; D003198:Computer Simulation; D003710:Demography; D005260:Female; D008297:Male; D008954:Models, Biological; D011157:Population Dynamics; D012744:Sex Ratio; D012919:Social Behavior