(2) Relatedness-based mate choice
To test if titis avoid mating with related individuals, we compared
relatedness between real and randomly generated mating partners using
the pairwise relatedness estimator implemented in STORM (Frasier, 2008).
First, relatedness of real mating pairs (n = 10) was calculated and
averaged. The expected relatedness of random mating pairs was then
calculated by generating mating pairs from female and male breeding
pools over 1000 simulations and compared to the observed relatedness
values. The breeding pool of 12 females and 12 males included all
sampled adults and the oldest subadult male from Group 6 who had
dispersed from his natal group in the beginning of the study period and
was thus available as a potential mating partner by the end of the
sampling period.