Figure 1
From: Coolidge effect in pond snails: male motivation in a simultaneous hermaphrodite
24 hour observations of copulation activity in groups of 2, 4 and 8 snails. The mean number of inseminations per individual are shown, the error bars represent standard errors of the mean of the replicates. For clarity the replicates are pooled. Groups with different letters (a or b) differ significantly from each other.