TY  - JOUR
A1  - Gros, Andreas
A1  - Poethke, Hans Joachim
A1  - Hovestadt, Thomas
T1  - Sex-specific spatio-temporal variability in reproductive success promotes the evolution of sex-biased dispersal
N2  - 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 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.
KW  - sex-biased dispersal
KW  - demographic stochasticity
KW  - metapopulation
KW  - individual-based simulation
KW  - sex-specific competition
Y1  - 2009
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-48711
ER  -