Dialects in southern Rocky Mountain pikas, Ochotona princeps (Lagomorpha)

摘要: Abstract This work quantifies the geographic variation (dialects) in vocalizations of southern Rocky Mountain pikas and presents data on vocal responses to playback recorded two dialects. Pika were tape-recorded twenty-six locations Wyoming, Colorado, Utah New Mexico. Two dialects (based duration note frequency fundamental) found short calls. One dialect was north Colorado River (dialect A), other south B). There seasonal incidence with a peak songs late spring calls summer. Results this study indicate that acoustic characteristics could be useful taxonomic tool genus Ochotona .