Fig. 1. Annual growth of 195 individually marked N. pulcher caught in the wild.

Increases in standard length [SL (in centimeters)] between two consecutive years (y axis) plotted as a function of SL in the first of these 2 years (x axis). Annual growth declined with increasing size at a similar rate in both sexes. Males (blue) had a higher size-specific growth rate and grew to a larger size than females (yellow). In both sexes, dispersing individuals (dashed lines; females, upward-pointing triangles; males, diamonds) grew at a faster size-specific rate than individuals that stayed in their territory throughout the observation period (solid lines; females, downward-pointing triangles; males, squares). Points give individual measurements and are slightly offset if overlapping to improve visibility. Statistical details are given in the main text and in sections S1 and S2.