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SIMILARITY OF SCAPHIOPUS INTERMONTANUS S BOMBIFRONS
ANALYSIS OF MATING CALLS
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4J cd 4J H allopatric animals anurans Appendix bandpass filter behavioral patterns biological species bombifrons calls boss breeding call differences call length cd 4J cd cd cd H Chapter character displacement CM CM CM Colorado River discriminant functions dominant frequency eastern Utah ellipses of equiprobability enclosure fontanelle four corners region geographic variation H 4J H cd H H H H i-l high-pulse-rate hybrids i-l cd i-l H inter intermontanus calls intermontanus females isolating mechanism length and pulse loudspeaker low-pulse-rate males mating call system measurements montanus morphological phenetic pulse number pulse rate range of response regression reproductive isolating reproductive isolating mechanism response of females samples Scaphiopus intermontanus seen shown in Figure significant specimens spectrograms subgenus Spea sympatry vocal cords vocal pouch volume volume velocity water temperature Wyoming