Figure 5. Female removal from male-female interaction changed the number of syllables produced and percent use of syllables types.

A total of 21528 syllables were analyzed. A) The number of syllables increased during the 5 minutes after interaction (Wilcoxon signed ranks *p = 0.015). B) The percent use of “up” and “U” syllables increased, while the percent use of “flat” and “down” syllables decreased (Wilcoxon signed ranks test **p = 0.008). For syllables “jump,” “harmonic,” “arc,” “short,” and “complex” there were no significant changes in use between the presence and absence of a female.