Adaptive echolocation sounds in the batRhinopoma hardwickei
- Joerg Habersetzer
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Rhinopoma hardwickei were studied under natural conditions in the Madurai region of southern India.
Frequency modulated (FM) sounds of 3 ms duration were emitted shortly before landing and during times when 10–70 individuals were flying in clusters as they left their roosts.
Constant frequency (CF) sounds of 48 ms duration were produced in open space by single flying bats and by bats flying in a group. At these times the most intense component was the second harmonic.
When bats flew in a group the frequencies of the CF-sounds emitted by different individuals were in three different bands (30.0, 32.5, and 35.0 kHz) whereas single flying bats used only 32.5 kHz. Evidence is presented that shows thatRhinopoma hardwickei flying in groups regulate the frequency of their individual CF-components and in this way they avoid jamming one another.
After landing a pure tone multi-harmonic sound of long duration (maximally 100ms) is emitted. In this sound the fundamental frequency is dominant. Its significance, either communicative and/or echolocative, is not clear.
The possible role of different types of sounds recorded in different orientation situations is discussed.
- Beuter K (1980) A new concept of echo evaluation in the auditory system of bats. In: Busnel AG, Fish J (eds) Animal sonar systems. Plenum Press, New York, pp 747–762
- Harnischfeger G (1980) Brainstem units of echolocating bats coding binaural time differences in the microsecond-range. Naturwissenschaften 67:314–315
- Miller LA, Degn HJ (1981) The acoustic behavior of four species of vespertilionid bats studied in the field. J Comp Physiol 142:67–74
- Neuweiler G (1980) Auditory processing of echoes. Part I: Peripheral processing. In: Busnel RG, Fish J (eds) Animal sonar systems. Plenum Press, New York, pp 519–548
- Novick A (1965) Echolocation of flying insects by the batChilonyc-terispsilotis. Biol Bull 128:297–314
- Pye JD (1972) Bimodel distribution of constant frequencies in some hipposiderid bats. J Zool (Lond) 166:323–335
- Pye JD (1978) Some preliminary observations on flexible echolocation systems. Proc Fourth Int Bat Res Conf, Olembo RJ, Castelino JB, Mutere FA (eds). Kenya Lit Bureau, Nairobi, pp 127–136
- Schnitzler H-U (1973) Control of Doppler shift compensation in the greater horseshoe bat,Rhinolophus ferrumequinum. J Comp Physiol 82:79–92
- Schuller G, Beuter K, Schnitzler H-U (1974) Response to frequency shifted artificial echoes in the batRhinolophus ferrumequinum. J Comp Physiol 89:275–286
- Simmons JA, O'Farrell MJ (1977) Echolocation by the long-eared bat,Plecotus phyllotis. J Comp Physiol 122:201–214
- Simmons JA, Stein RA (1980) Acoustic imaging in bats sonar: echolocation signals and evolution of echolocation. J Comp Physiol 135:61–84
- Simmons JA, Lavender WA, Lavender BA et al. (1974) Target structure and echo spectral discrimination by echolocating bats. Science 186:1130–1132
- Simmons JA, Howell DJ, Suga N (1975) Information content of bat sonar echoes. Am Sci 63:204–215
- Simmons JA, Fenton MB, O'Farrell MJ (1979) Echolocation and pursuit of prey by bats. Science 203:16–21
- Adaptive echolocation sounds in the batRhinopoma hardwickei
Journal of comparative physiology
Volume 144, Issue 4 , pp 559-566
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- Joerg Habersetzer (1) (2)
- Author Affiliations
- 1. Indo-German Project on Animal Behaviour, School of Biological Sciences, Madurai Kamaraj University, Madurai, India
- 2. Zoologisches Institut der Universität Frankfurt, Siesmayerstrasse 70, D-6000, Frankfurt, Federal Republic of Germany