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Mammalian basal metabolic rate is proportional to body mass2/3

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Figure 2
Figure 2

Relationship between mammalian body mass (M, g) and basal metabolic rate (BMR, ml of O2 per h) for all data (a; n = 619, r2 = 0.94), data corrected to a common body temperature (36.2°C) by using a Q10 of 3.0 (b; n = 507, r2 = 0.96), and data corrected to 36.2°C for all species excluding Artiodactyla, Lagomorpha, Soricidae (Insectivora), and Macropodidae (Diprotodontia) (c; n = 469, r2 = 0.96). Exponents are shown with 95% confidence intervals.

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