Correspondence between evoked vocal responses and auditory thresholds in Pleurodema thaul (Amphibia; Leptodactylidae).

Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
M PennaR Solís

Abstract

Thresholds for evoked vocal responses and thresholds of multiunit midbrain auditory responses to pure tones and synthetic calls were investigated in males of Pleurodema thaul, as behavioral thresholds well above auditory sensitivity have been reported for other anurans. Thresholds for evoked vocal responses to synthetic advertisement calls played back at increasing intensity averaged 43 dB RMS SPL (range 31-52 dB RMS SPL), measured at the subjects' position. Number of pulses increased with stimulus intensities, reaching a plateau at about 18-39 dB above threshold and decreased at higher intensities. Latency to call followed inverse trends relative to number of pulses. Neural audiograms yielded an average best threshold in the high frequency range of 46.6 dB RMS SPL (range 41-51 dB RMS SPL) and a center frequency of 1.9 kHz (range 1.7-2.6 kHz). Auditory thresholds for a synthetic call having a carrier frequency of 2.1 kHz averaged 44 dB RMS SPL (range 39-47 dB RMS SPL). The similarity between thresholds for advertisement calling and auditory thresholds for the advertisement call indicates that male P. thaul use the full extent of their auditory sensitivity in acoustic interactions, likely an evolutionary adaptation allowing chor...Continue Reading

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Citations

May 1, 2009·Die Naturwissenschaften·Mario PennaPeter M Narins
Dec 15, 2012·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Andrea Megela Simmons
Jun 12, 2013·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Mario PennaFelipe N Moreno-Gómez
Dec 21, 2013·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Mario Penna, Felipe N Moreno-Gómez
Jun 9, 2015·Behavioural Processes·Nelson A VelásquezMario Penna
Jul 3, 2019·Current Zoology·Ryan C TaylorMichael J Ryan

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