Discrimination of acoustic communication signals by grasshoppers (Chorthippus biguttulus): temporal resolution, temporal integration, and the impact of intrinsic noise

Journal of Comparative Psychology
Bernhard RonacherRüdiger Krahe

Abstract

A characteristic feature of hearing systems is their ability to resolve both fast and subtle amplitude modulations of acoustic signals. This applies also to grasshoppers, which for mate identification rely mainly on the characteristic temporal patterns of their communication signals. Usually the signals arriving at a receiver are contaminated by various kinds of noise. In addition to extrinsic noise, intrinsic noise caused by stochastic processes within the nervous system contributes to making signal recognition a difficult task. The authors asked to what degree intrinsic noise affects temporal resolution and, particularly, the discrimination of similar acoustic signals. This study aims at exploring the neuronal basis for sexual selection, which depends on exploiting subtle differences between basically similar signals. Applying a metric, by which the similarities of spike trains can be assessed, the authors investigated how well the communication signals of different individuals of the same species could be discriminated and correctly classified based on the responses of auditory neurons. This spike train metric yields clues to the optimal temporal resolution with which spike trains should be evaluated.

Citations

Mar 20, 2012·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·M HartbauerH Römer
Dec 22, 2010·Journal of Computational Neuroscience·Jan P WittmannKlaus Reinhold
Feb 2, 2010·Journal of Insect Physiology·Andrea WirmerRalf Heinrich
Dec 30, 2014·Evolution; International Journal of Organic Evolution·Michael S Reichert, Bernhard Ronacher
Jun 26, 2012·Journal of Physiology, Paris·Bernhard Ronacher, Nicole Stange
Mar 21, 2017·ELife·Michael G Metzen, Maurice J Chacron
Jul 16, 2010·Journal of Neurophysiology·Gary Marsat, Leonard Maler
Nov 27, 2015·Journal of Neurophysiology·Sarah Wirtssohn, Bernhard Ronacher
Jan 23, 2015·Journal of Neurophysiology·Sarah Wirtssohn, Bernhard Ronacher

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