PMID: 9163929May 1, 1997Paper

Discrimination of sinusoidally frequency-modulated sound signals mimicking species-specific communication calls in the FM-bat Phyllostomus discolor

Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology
K H Esser, B Lud

Abstract

In the lesser spear-nosed bat, Phyllostomus discolor, maternal directive calls are characterized by an individual type of sinusoidal frequency modulation (= SFM) pattern. Beside modulation frequency, modulation depth, carrier frequency, and number of modulation cycles per call contribute to the mother's vocal signature. Since juvenile P. discolor learn to adapt their isolation calls to the corresponding call characteristics of the own mother or even to playback of a computer-stored directive call, if hand-reared in the absence of conspecifics, the bats' auditory system ought to be able to resolve interindividual differences in communication call structure. However, quantitative psychoacoustic data on the discrimination of SFM signals in this species are not available. Thus, in the present study, lesser spear-nosed bats were trained in a two-alternative forced-choice procedure to discriminate between two alternatingly presented SFM sound signals differing in modulation frequency. Other characteristics of acoustic stimuli were identical and designed to mimick the fundamental of species-specific calls. By gradually reducing the difference in modulation frequency between both stimuli within the behavioural relevant range until the ...Continue Reading

Citations

Sep 21, 2004·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Anna WittekindtManfred Kössl
Nov 21, 2007·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Susanne HoffmannUwe Firzlaff
Apr 24, 2009·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Simone Janssen, Sabine Schmidt
Mar 4, 2011·Journal of Neurophysiology·Robert T Naumann, Jagmeet S Kanwal
Apr 15, 2020·Biology Letters·Ella Z LattenkampLutz Wiegrebe

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