Article: article from journal or magazin.
Estimating sex-specific dispersal rates with autosomal markers in hierarchically structured populations.
Publication types: Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't Publication Status: ppublish
A recent study suggests that sex-specific dispersal rates can be quantitatively estimated on the basis of sex- and state-specific (pre- vs. postdispersal) F-statistics. In the present paper, we extend this approach to account for the hierarchical structure of natural populations, and we validate it through individual-based simulations. The model is applied to an empirical data set consisting of 536 individuals (males, females, and predispersal juveniles) of greater white-toothed shrews (Crocidura russula), sampled according to a hierarchical design and typed for seven autosomal microsatellite loci. From this dataset, dispersal is significantly female biased at the local scale (breeding-group level), but not at the larger scale (among local populations). We argue that selective pressures on dispersal are likely to depend on the spatial scale considered, and that short-distance dispersal should mainly respond to kin interactions (inbreeding or kin competition avoidance), which exert differential pressure on males and females.
Animals, Female, Genetics, Population, Male, Microsatellite Repeats/genetics, Models, Biological, Movement/physiology, Population Dynamics, Selection, Genetic, Sex Factors, Shrews/physiology, Switzerland
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