Animal Sonar pp 335-340 | Cite as

Ontogeny of the Echolocation System in Rhinolophoid CF-FM Bats: Audition and Vocalization in Early Postnatal Development

  • Rudolf Ruebsamen
Part of the NATO ASI Science book series (NSSA, volume 156)


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).


Inferior Colliculus Echolocation Call Early Postnatal Development Auditory Filter Filter Region 
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  1. Habersetzer, J., Marimuthu, G. (1986) Ontogeny of sounds in the echolocating bat Hipposideros speoris. J. Comp. Physiol. 158: 147–157CrossRefGoogle Scholar
  2. Vater, M (1987) Lightmicroscopic observations on cochlear development in horseshoe bats. (This volume)Google Scholar

Copyright information

© Plenum Press, New York 1988

Authors and Affiliations

  • Rudolf Ruebsamen
    • 1
  1. 1.Lehrstuhl Allgemeine ZoologieRuhr-Universitaet Bochum, ND|6BochumFederal Republic of Germany

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