Table 1.

Summary of fixed and random effects from generalized linear mixed models (GLMMs) of maternal survival and fecundity the year after giving birth to a calf. (‘Parameter estimate’ gives the mode of the posterior distribution for the coefficient of that variable; parameter estimates are on the link scale for the GLMM (logit link for binomial errors). ΔR² shows the change in marginal R² (which is a %) when each fixed effect is dropped from the model in turn.)

	variable	parameter estimate	lower CI	upper CI	PMCMC	ΔR2
survival	n = 2888 (636 females)				marginal R2 = 27.64%
random effects	year	0.638	0.267	1.099
fixed effects	age	0.421	0.202	0.666	<0.001	−16.66
	age2	−0.038	−0.051	−0.027	<0.001
	population size	−0.014	−0.025	−0.003	0.004	−2.79
	calf birth date	−0.021	−0.030	−0.014	<0.001	−2.21
	calf sex: male	−0.384	−0.705	−0.080	0.023	−0.65
	calf survival	−1.844	−2.582	−1.198	<0.001	−5.03
fecundity	n = 2600 (602 females)				marginal R2 = 29.04%
random effects	year	0.754	0.348	1.172
	maternal ID	1.963	1.381	2.612
fixed effects	age	0.901	0.697	1.088	<0.001	−3.55
	age2	−0.054	−0.065	−0.043	<0.001
	population size	−0.029	−0.040	−0.019	<0.001	−7.19
	calf birth date	−0.043	−0.052	−0.034	<0.001	−5.55
	calf sex: male	−0.347	−0.570	−0.085	0.003	−0.50
	calf survival	−3.564	−4.077	−3.071	<0.001	−14.38