Table 2.

Full and minimum adequate (final) models testing the effects of different paternal and maternal drivers on litter sex ratio. Sire f and dam f represent the coefficient of inbreeding of the father and mother, respectively. Full model: null deviance: 1.390 on 37 d.f.; residual deviance: 0.959 on 30 d.f.; AIC: −13.97. Final model: residual deviance: 1.078 on 36 d.f.; AIC: −21.502. Statistically significant results are highlighted in italics.

	estimate	s.e.	t	p
full model term
intercept	2.275	1.250	1.819	0.078
sire f	−2.105	3.760	−0.56	0.579
sperm nucleus area	−0.158	0.073	−2.17	0.038
protocol	—	—	0.19	0.819
age	0.003	0.001	1.50	0.143
number offspring	0.008	0.011	0.72	0.476
dam f	−1.728	4.543	−0.38	0.706
final model term
intercept	2.723	0.711	3.826	0.0004
sperm nucleus area	−0.181	0.056	−3.222	0.0026