Figure 2. Temporal relationship between USVs and mounting.

A) Relative (normalized to max) percent number of all syllables and amount of time spent mounting per 3 second time bin (minor tick marks) for a single 5 minute trial. B) For the same trial, the average number of syllables in the 10 seconds before each mount was higher relative to all other 10 s time bins (bars show SE). C) Across 23 trials with mounting, the number of syllables in the 10 seconds before mounting was significantly higher than the number of syllables in the 10 seconds after mounting (Wilcoxon signed ranks test *p = 0.001); however, there was no difference between the number of syllables in the 10 seconds before mounting and the 20–10 seconds before mounting or the 10 seconds after mounting and the 10 to 20 seconds after mounting.