Table 2.

Parameter estimates (± SE) and confidence intervals (CI; 95% and 85%) from the best supported linear mixed effect models explaining hatchling measurements (body mass (control/enlarged, n = 54/51 chicks), Tarsus (n = 35/45 chicks), bill (n = 35/45 chicks) and total head (n = 15/27 chicks) length) with candidate models including experimental group, egg volume and laying date as fixed factors and brood ID as random effects.

Response				95% CI		85% CI
	Model	Estimate	SE	lower	upper	lower	upper	p
Mass	(Intercept)	1.363	1.075	− 0.796	3.565	− 0.202	2.952	0.215
	Group (enlarged)	− 0.301	0.131	− 0.569	− 0.037	− 0.494	− 0.110	0.029
	Egg volume	0.621	0.112	0.391	0.847	0.455	0.785	< 0.001
Tarsus	Intercept	15.04	1.682	11.56	18.44	12.54	17.50	< 0.001
	Group (enlarged)	− 0.367	0.204	− 0.780	0.053	− 0.666	− 0.065	0.085
	Egg volume	0.400	0.173	0.051	0.757	0.148	0.657	0.029
	Laying date	0.096	0.029	0.037	0.155	0.053	0.138	0.003
Bill	Intercept	6.401	0.461	5.450	7.330	5.717	7.074	< 0.001
	Group (enlarged)	0.242	0.208	− 0.182	0.667	− 0.064	0.548	0.257
	Laying date	0.090	0.029	0.032	0.150	0.048	0.133	0.004
Head and bill	Intercept	25.42	0.234	24.94	25.94	25.08	25.79	< 0.001
	Group (enlarged)	− 0.676	0.288	− 1.321	− 0.088	− 1.129	− 0.255	0.037