Figure 6

Relationship between daily energy expenditure and body mass in artiodactyls. Data are measurements of field metabolic rate (FMR) using the doubly labelled water method and body mass (BM) for eight artiodactyls (including data on llamas from the present study). The phylogenetically controlled allometric relationship is FMR (MJ d−1) = 1.23 BM0.63±0.12 (F 1,7 = 26.2, P < 0.001, R² = 0.81, ML λ = 0.64) (see text for details).