Fig. 3. The effect of the absolute difference frequency (Df) on signal production rates for Type 2 chirps (A) and AFRs (B). (A) Type 2 chirps are classified by sex pairing; the Type 2 chirp rates of males paired with a second male (squares; N=16, R²=0.21), and of males paired with a female (diamonds; N=9, R²=0.860). (B) AFRs in which all fish were pooled because there were no differences across the different sex pairings (N=42, R²=0.14). Linear regressions are shown.