Table 3.

Estimates of heritability from univariate models, both with and without correcting for population of origin and batch effects

	Correcting for origin and batch effects			Not correcting for origin and batch effects
Trait	Heritability	SE	P	Heritability	SE	P
Clutch size	0.204	0.093	0.004*	0.465	0.107	<0.001**
Egg size	0.127	0.130	0.262	0.325	0.142	<0.001**
Direct care	0.012	0.067	0.854	0.156	0.085	0.008*
Indirect care	0.083	0.089	0.308	0.209	0.097	0.002*
Time begging	0.200	0.129	0.039	0.214	0.125	0.025
Dispersal mass	0.179	0.112	0.051	0.338	0.125	<0.001**
No. dispersed	0.156	0.068	0.001*	0.417	0.088	<0.001**

Significance is given by *P < 0.01; **P < 0.001, estimated from a likelihood ratio test comparison with a model in which additive genetic variance is not fitted. SE, standard error.