Figure 1. Relationship between size and age for known-age female (a) and male (b) Caiman crocodilus yacare (circles) based on the Richards curve (thick continuous line).

Filled circles indicate females that were captured attending nests. Models based on growth-rate-on-size relationships for animals of unknown age are given by the fine continuous line (full Richards model), short dashes (von Bertalanffy, m = 0.667) and long dashes (monomolecular, m = 0).