Discrimination of surface-structured targets by the echolocating batMyotis myotis during flight
Rent the article at a discountRent now
* Final gross prices may vary according to local VAT.Get Access
Myotis myotis was trained to discriminate a plate with 8 mm deep holes from plates of stepwise varied hole depth. Depth differences in the two plates equal or larger than 1 mm were discriminated by the echolocating bat (Fig. 3).
In a second series of experiments a plate with 4 mm deep holes was discriminated from other plates with hole depth differences equal or larger than 0.8 mm (Fig. 3).
Echolocation sounds emitted during discrimination are of the same type as those used for catching prey in air or on the ground (Fig. 2). With increasing difficulty of the discrimination task the flight speed of the bat was reduced (Fig. 1).
An incidental experiment disclosed the ability to discriminate surface structures with the resolution of roughness produced by 30 μm protrusions in the surface (Fig. 4).
We conclude thatMyotis myotis discriminated hole depth differences by spectral, and not by time, cues in the echoes.
- Altes, RA, Titlebaum, EL (1970) Bat signals as optimally Doppler tolerant waveforms. J Acoust Soc Am 48: pp. 1014-1020
- Beuter, K A new concept of echo evaluation in the auditory system of bats. In: Busnel, RG, Fish, J eds. (1980) Animal sonar systems. Plenum Press, New York, pp. 747-762
- Habersetzer J (1978) Ortungslaute der Mausohrfledermäuse (Myotis myotis) in verschiedenen Ortungssituationen. Masters thesis, University of Frankfurt
- Harnischfeger, G (1980) Brainstem units of echolocating bats coding binaural time differences in the microsecond-range. Naturwissenschaften 67: pp. 314-315
- Johnson, RA Energy spectrum analysis in echolocation. In: Busnel, RG, Fish, J eds. (1980) Animal sonar systems. Plenum Press, New York, pp. 673-693
- Neuweiler, G, Bruns, V, Schuller, G (1980) Ears adapted for the detection of motion, or how echolocating bats have exploited the capacities of the mammalian auditory system. J Acoust Soc Am 68: pp. 741-753
- Simmons, JA (1979) Perception of echo phase information in bat sonar. Science 204: pp. 1336-1338
- Simmons, JA The processing of sonar echoes by bats. In: Busnel, RG, Fish, J eds. (1980) Animal sonar systems. Plenum Press, New York, pp. 695-714
- Simmons, JA, Lavender, WA, Lavender, BA, Doroshow, CA, Kiefer, SW, Livingston, R, Scallet, AC (1974) Target structure and echo spectral discrimination by echolocating bats. Science 186: pp. 1130-1132
- Discrimination of surface-structured targets by the echolocating batMyotis myotis during flight
Journal of comparative physiology
Volume 152, Issue 2 , pp 275-282
- Cover Date
- Print ISSN
- Online ISSN
- Additional Links
- Industry Sectors