Table 1.

Variance components (and SE) from quantitative genetic analysis of egg-laying date, separately by temperature class.

	Cold	Medium	Warm
VA	3.75 ± 1.37	10.8 ± 1.82	9.69 ± 1.41
h2	0.14 ± 0.05	0.38 ± 0.06	0.41 ± 0.06
VPE	8.24 ± 1.63	3.00 ± 1.80	2.27 ± 1.43
Vres	15.4 ± 0.90	14.5 ± 0.77	11.9 ± 0.69
No. observations	4624	3737	4147
No. individuals	4032	3019	3532

Age (‘first year breeder’ vs. ‘older’), area, year (as factor) and the interaction between area and year were included as fixed effects.