Ontogeny of the Echolocation System in Rhinolophoid CF-FM Bats: Audition and Vocalization in Early Postnatal Development
The offsprings of the Old World bats Rhinolophus rouxi and Hipposideros speoris are born in a relatively immature state of development. During the first postnatal week these bats do not hear, but when separated from their mothers they produce multiharmonic isolation calls. These vocalizations differ conspicuously from the echolocation pulses of the adult, which in both species are higher pitched and are composed of an initial constant frequency component (CF) followed by a brief decreasing frequency modulation (FM), ranging about 15–20 kHz, emitted through the nose (nasal calls).
KeywordsInferior Colliculus Echolocation Call Early Postnatal Development Auditory Filter Filter Region
Unable to display preview. Download preview PDF.