Table 1.

Results of GLMs (Gaussian error) for the response variables: gestation time, number of offspring, size of offspring, and growth of offspring of females mated to related and unrelated males. Inbreeding coefficient (% change with inbreeding). Bold values represent significant values

Response	Predictor	β	SE	df	t	P	Mean ± SE (N)		δ
							Inbred	Outbred
Gestation time (days)	Intercept	28.756	17.224	101.150	1.669	0.098	33.67 ± 0.794 (112)	32.33 ± 0.883 (87)	−4.145
	Treatment	1.228	1.204	159.180	1.020	0.309
	Female size	0.230	0.532	132.770	0.432	0.667
	Female age	−0.028	0.083	70.880	−0.343	0.733
Number of offspring	Intercept	−4.941	6.125	112.740	−0.807	0.422	3.83 ± 0.256 (112)	4.48 ± 0.344 (87)	14.509
	Treatment	−1.003	0.404	154.160	−2.481	0.014
	Female size	0.671	0.186	143.070	3.599	<0.001
	Female age	−0.065	0.030	77.000	−2.180	0.032
Size of offspring (mm)	Intercept	7.030	0.783	101.800	8.975	<0.001	7.352 ± 0.029 (212)	7.368 ± 0.016 (590)	0.217
	Treatment	0.021	0.069	135.200	0.310	0.757
	Female size	0.003	0.024	121.700	0.138	0.890
	Female age	0.003	0.004	85.940	0.763	0.448
Growth of offspring (mm in first week)	Intercept	3.104	1.164	99.150	2.666	0.009	3.633 ± 0.045 (172)	3.560 ± 0.028 (501)	−2.050
	Treatment	0.106	0.094	140.540	1.128	0.261
	Female size	0.024	0.036	114.280	0.680	0.498
	Female age	−0.003	0.005	83.500	−0.589	0.557