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Fig. 8. Upper panel: cross-correlogram relating Type 2 chirp production with attack
counts are given for (A) a single fish (N=16) and (B) between fish
(N=10). Only male fish, and trials involving 10 or more chirps and
attacks are used in the chirp-attack 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).