Fig. 2
Plot of the logarithm of red blood cells volume (VRBC) versus the logarithm of body mass in mammals after Savage et al. [37]. 95% CI of the slope for all 74 records (black line) falls around the value of 0, indicating lack of relationship between cell size and body mass in mammals. However, analyses conducted on orders level revealed heterogeneity of the slopes (p < 0.001) pointing to strong relation of size of cells with body mass at lower taxonomical levels; Slops for n ≥ 6 records are shown only: Carnivora (green), Primates (red), Perrsiodactyla (blue), Rodentia (purple); remain records (dark blue)