Table 2. Sex-specific, ecological brain structure correlates.

Males			Females
Olfactory bulbs	λ = 0.68			λ = 0.99
Brain	0.950±0.168	p<0.0001	Brain	0.894±0.012	p<0.0001
Habitat	−0.07±0.032	p = 0.047	Habitat	−0.068±0.02	p = 0.002
Telencephalon	λ = 0.80			λ = 0.86
Brain	1.04±0.05	p<0.0001	Brain	1.14±0.06	p<0.0001
Habitat	0.04±0.01	p = 0.0002	Habitat	0.03±0.011	p = 0.025
Optic tecta	λ = 0			λ = 0
Brain	1.07±0.04	p<0.0001	Brain	1.05±0.04	p<0.0001
Depth	−0.05±0.02	p = 0.03	Depth	−0.07±0.02	p = 0.001
Cerebellum	λ = 0			λ = 0.3
Brain	1.12±0.051	p<0.0001	Brain	1.17±0.05	p<0.0001
			Depth	−0.06±0.028	p = 0.026
Dorsal Medulla	λ = 1			λ = 1
Brain	0.87±0.15	p<0.0001	Brain	0.95±0.11	p<0.0001
			Habitat	−0.04±0.01	p<0.0001
Hypothalamus	λ = 0.74			λ = 1
Brain	0.95±0.057	p<0.0001	Brain	0.99±0.07	p<0.0001

For each model we present the value of the evolutionary parameter of the gls model, the partial regression coefficients and their standard errors, as well as the associated p-value. Only correlates retained in the minimum adequate model are shown.