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Fig. 7. Upper panels: cross-correlograms illustrate signal relationships between
fish for (A) Type 2 chirps (N=14), (B) AFRs (N=22), and (C)
Type 2 chirps and AFRs (N=16). Means for all fish for all trials in
which fish produced 10 or more signals are plotted, except in the case of Type
2 chirps where only male counts are used in the analysis. Horizontal line
denotes the null distribution. Lower panels: bin-by-bin statistical analysis
of the correlograms. The fraction of individual fish in which the
corresponding bin height is either greater than expected by chance
(P>0.95, black line) or less than expected by chance
(P<0.05, grey line).