Fig. 2. Validation of alternative regression models derived from analyses summarized in Fig. 1. (A) Equations fitted to data by non-linear regression (solid black line) and by back-transformation from logarithms (dashed red line) are displayed together in a double logarithmic plot. (B) Equations fitted to data by non-linear regression (solid black line) and by back-transformation from logarithms (dashed red line) are displayed together in an arithmetic plot. (C) Arithmetic values for BMR are displayed against values for mass on a log scale. The upward trajectory for the lines is a consequence of the semi-log plot. The inset expands that part of the scale for animals weighing between 100 and 10,000 g.