Persistent Copulation in Asexual Female   Potamopyrgus antipodarum: Evidence for Male Control with Size-Based Preferences

Figure 2

Differences in mean copulation frequency (±1 standard deviation) for all four male cultures. Letters in common above error bars indicate 𝑃>.05 in a Bonferroni-corrected chi-square test for differences in copulation frequency. Bonferroni-adjusted 𝑃 values for significant differences are as follows: 𝑃(a/b)=.0012-.00012, 𝑃(b/c)=.009, and 𝑃(a/c)=.00006.