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

<p>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).