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Fig. 3. Intensity dependence of pulse-rate preferences in tests between standard
calls and alternatives with pulse rates at the low- and high-cutoff values
(see text for definition). (A) Preferences of H. chrysoscelis; (B)
preferences of H. versicolor. Error bars are 95% credible intervals,
and statistically significant, post-hoc comparisons of least-square
means between the proportions of females choosing the standard call depending
on carrier frequency are indicated by asterisks
(*P<0.05; **P<0.01). See
Materials and methods and Results for details about the statistical analyses.
N=number of female choices (one per female in each test).