Table 1.

Degrees of freedom (d.f.), AIC and ΔAIC values for the different models tested in the comparative analysis.

model	d.f.	AIC	ΔAIC
half-life ∼ longevity	4	94.34	2.77
half-life ∼ BMR	4	97.30	5.73
half-life ∼ longevity + BMR	5	91.57	0
half-life ∼ longevity × BMR	6	108.35	16.78