Table 3.

Parameter estimates for the best-fit (statistical + evolutionary) models for standard metabolic rate (SMR), mitochondrial respiration and citrate synthase activity.

term	estimate	s.e.
Q10-normalized SMR
intercept	−1.14	0.17
logM	0.80	0.03
latitude	0.008	0.002
hemisphere: southern	−0.22	0.10
SMRa
intercept	−1.03	0.18
logM	0.78	0.03
temperatureb	0.016	0.005
Q10-normalized mitochondrial respiration
intercept	1.56	0.22
latitude	0.006	0.003
tissue: red muscle	−0.19	0.11
mitochondrial respiration
intercept	1.49	0.08
temperature	0.017	0.005
citrate synthase activity
intercept	−0.30	0.17
log(depth)	−0.29	0.06
latitude	0.015	0.003
environment: pelagic	0.28	0.10
environment: demersal	−0.12	0.08

^aThe best (statistical + evolutionary) model for SMR modelled evolution on a tree with all branch lengths set equal to 1, with λ set equal to 1 (w_i = 0.16).

^bA parameter estimate of 0.016 for the temperature dependence of log-transformed SMR is equivalent to an across species value of Q₁₀ of 1.4 (95% confidence interval: 1.11–1.85).