Table 2. Regression models of asymptotic size and growth rates of body mass (g) and head length (mm) in relation to sex and the proportion of terrestrial food in diet (field) or diet treatment (aviary).

Non-significant interactions were removed from each model.

	Parameter	Variable		Estimated marginal mean or coefficient ± s.e	F-statistic	d.f.	p-value
Body mass
Field	Asymptote (g)	Proportion Terrestrial Food		−287.92 ± 60.13	24.01	1,42	<0.001
		Sex	Female	684.06 ± 20.97	45.74	1,42	<0.001
			Male	859.29 ± 15.21
	Growth rate (days−1)	Proportion Terrestrial Food		−0.20 ± 0.95	0.05	1,42	0.819
		Sex	Female	5.61 ± 0.33	1.77	1,42	0.190
			Male	6.16 ± 0.24
Aviary	Asymptote (g)	Diet	Fish	852.85 ± 19.65	11.72	1,17	0.003
			Chicken	947.98 ± 19.65
		Sex	Female	809.41 ± 19.65	42.9	1,17	<0.001
			Male	991.42 ± 19.65
	Growth rate (days−1)	Diet	Fish	5.84 ± 0.22	10.60	1,17	0.005
			Chicken	6.86 ± 0.22
		Sex	Female	6.06 ± 0.22	3.52	1,17	0.078
			Male	6.64 ± 0.22
Head length
Field	Asymptote (mm)	Proportion Terrestrial Food		−12.39 ± 3.52	13.32	1,42	<0.001
		Sex	Female	107.42 ± 1.23	63.76	1,42	<0.001
			Male	119.53 ± 0.89
	Growth rate (days−1)	Prop. Terr. Food		0.10 ± 1.56	0.004	1,42	0.95
		Sex	Female	12.20 ± 0.54	4.00	1,42	0.052
			Male	13.55 ± 0.40
Aviary	Asymptote (mm)	Diet	Fish	124.38 ± 1.79	0.003	1,17	0.955
			Chicken	124.53 ± 1.79
		Sex	Female	118.40 ± 1.79	22.88	1,17	<0.001
			Male	130.50 ± 1.79
	Growth rate (days−1)	Diet	Fish	14.82 ± 0.47	1.01	1,17	0.330
			Chicken	15.48 ± 0.47
		Sex	Female	14.68 ± 0.47	1.99	1,17	0.177
			Male	15.61 ± 0.47