Fig. 10
Allometry of relative brood mass (in % of female mass). Red: birds; blue: squamates; purple: turtles; yellow: placental mammals; brown: marsupial mammals. Note that density plot of relative brood mass and regression line for marsupials are not shown because values are very close to zero. Solid regression lines are from Generalized Additive Models with knots (K = 9). Note that x-axis is log10 scaled