Table 1.

Posterior mean, mode, 95% credible interval (95% CI), and proportion of posterior density that was negative (%negative) for (A) estimated fixed effects and (co)variance components for female liability for extra‐pair reproduction and male liability for paternity loss estimated from a univariate animal model with immigrant and founder genetic groups, and (B) associated derived parameters. Estimated permanent individual female, male, pair, and year variances were small (Supporting Information S3)

(A) Estimated parameters	Mean [mode]	95% CI [%negative]
Fixed effects
Intercept	–0.67 [–0.81]	–1.83 to 0.65
Immigrant genetic group effect on female liability (g f)	–1.17 [–0.99]	–2.90 to 0.46 [91.4%]
Immigrant genetic group effect on male liability (g m)	–1.55 [–1.53]	–3.07 to 0.04 [97.2%]
Year	0.05 [0.06]	–0.01 to 0.11 [3.7%]
Male age	–0.19 [–0.18]	–0.32 to –0.05 [99.9%]
(Co)variance components
Additive genetic variance in female liability (Var(a f))	1.26 [1.12]	0.33 to 2.28
Additive genetic variance in male liability (Var(a m))	0.47 [0.38]	0.001 to 1.01
Additive genetic covariance (cov(a f,a m))	–0.37 –0.40]	–0.91 to 0.04 [94.7%]
Residual variance	3.58 [3.55]	2.54 to 4.55

(B) Derived parameters
Additive genetic correlation (cor(a f,a m))	–0.51 [–0.69]	–0.98 to 0.01 [94.7%]
Heritability of female liability (hf 2)	0.20 [0.21]	0.07 to 0.35
Heritability of male liability (hm 2)	0.08 [0.05]	0.001 to 0.16
Total additive genetic variance (Var(a T))	0.98 [0.91]	0.09 to 2.03