Within-male variations in dominant frequency in several anurans.

DF: dominant frequency; cc: consecutive callsa: call mid-frequency instead of DFb: weighted average on several values given for different years or different populationsc: fundamental frequency instead of DFd: mean fundamental frequency on frequency modulated long callse: within the same recordf: between different records from different nightsmd: median instead of meang: between different recordsh: about 20 calls/bout; DF determined by averaging spectral properties over a complete bouti: 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 recordWithin-male variations in dominant frequency in several anurans.