JEB -- Martin et al. 208 (9): 1731 Figure IG3

(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.

Fig. 3. Scaling of gestation periods for a sample of 429 placental mammal species (first author's dataset). Regardless of the method used, determination of a single best-fit line for the data yields a value for the scaling exponent ( ${alpha}$ ) close to 0.25 (least-squares regression, 0.240; major axis, 0.255; reduced major axis, 0.285; rotation line, 0.260). (After Martin, 1989.) Gestation (days); body mass (g).