Importantly, ASR and breeding density had a marginally significant interactive effect on mating system, suggesting that the effects of skewed sex ratios on mating systems are modulated by densities.
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The evolution of sex roles: The importance of ecology and social environment.
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Our results remained qualitatively and in terms of significance consistent between the models using different trees, except for one polygamy frequency bivariate model with breeding density as a predictor, where we observed a marginally nonsignificant effect instead of a significant effect when using the supertree instead of the consensus tree in the PGLS model: effect of breeding density, estimate −0.23 ± 0.11, P = 0.09, λ = 0.67, R 2 = 0.05).