Within-male variations in dominant frequency in several anurans.

DF: dominant frequency; cc: consecutive calls a: call mid-frequency instead of DF b: weighted average on several values given for different years or different populations c: fundamental frequency instead of DF d: mean fundamental frequency on frequency modulated long calls e: within the same record f: between different records from different nights md: median instead of mean g: between different records h: about 20 calls/bout; DF determined by averaging spectral properties over a complete bout i: 3 calls at the start, 3 at the middle and 3 at the end of the bout, on 3 bouts from the start, the middle and the end of the record Within-male variations in dominant frequency in several anurans.