Comparisons of observed and expected rates of paternity assignment.

Paternity assignment rates for San Jorge include all sampled territorial males and only those males sampled within the study site (excluding adjacent areas). At Los Islotes data from sites A and B were combined. The males for each year were actually sampled the year of conception (t−1). Expected paternities are calculated under the assumption females are equally likely to mate with any territorial male, regardless of territory location. P-values from a two-tailed binomial test and power (1−β) for p = 0.05 are reported.