An Investigation of the Functional Significance of Responses of the Gray Treefrog (Hyla versicolor) to Chorus Noise

摘要: Abstract We evaluated the hypothesis that adjustments in call duration made by male Gray Treefrogs render their calls less easily masked noise and so facilitate communication with females choruses. also tested whether shifts rate can be elicited through changes level of filtered background noise. found males increased number pulses while lowering elevations a fashion similar to reported during broadcasts calls. In phonotaxis tests using unmodulated or modulated (10, 20, 30, 40 long) presented at either unequal equal rates, we failed find significant differences levels recognition thresholds for different duration. However, were detected more (i.e., higher) when was as compared unmodulated. Our results those an earlier...