Posterior distributions of genetic variances for fitness components. Distributions show either the raw posterior (for the cross-sex covariances in the top row) or the posterior on a log scale (for sex-specific variances) of the sire variance component for bivariate mixed models fit separately for each trait/fitness component. There was statistical support for treatment effects on the sire covariance matrix for resource acquisition and survival but not for reproductive success or total fitness. Genetic correlations are presented in Table 2.