Fig. 7. Relationship between the scaling exponent (± 95% CI) of various mammalian metabolic rates (filled symbols: S, standard; B, basal; T, thermoneutral resting; P, peak post-feeding; F, field; E, exercise induced maximum) and the elevation of the allometric relationship at a mass of 21 g (modal mammalian body mass from Blackburn and Gaston, 1998). The relationship is significant (r=0.97, P=0.001), with the data for cold-induced maximum metabolic rate (C, unfilled symbol) excluded.