Abstract
The present study investigated whether and to which extent temporal integration in bats is influenced by echolocation behavior. One way to quantify temporal integration is to measure the detection threshold for a pair of short tone pips as a function of the temporal separation between the pips. To asses the effect of preceding sonar emission on temporal integration in the bat, Megaderma lyra, the detection thresholds of identical subjects were measured in a passive as well as in an active paradigm. In the passive paradigm, the presentation of the pip pairs was independent of the bats' sonar emissions; in the active paradigm, the presentation was triggered by the bats' sonar emissions. In both cases, the bats showed a very short integration time in the range of 100-200 micros. Moreover, the comparison of the active and passive results within each bat revealed no systematic differences in the two measuring paradigms. These results indicate that temporal integration is not influenced by echolocation. Simulations with a computer model of cochlear filtering based on measurements of M. lyra cochlear tuning suggest that the perceptual temporal integration is dominated by the integration of the cochlear filters.
Citations
Nov 24, 2007·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Sven Schörnich, Lutz Wiegrebe
Jun 29, 2010·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Sabine SchmidtJan-Eric Grunwald
Sep 18, 2010·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Yossi YovelHans-Ulrich Schnitzler
Apr 6, 2011·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Yossi YovelNachum Ulanovsky
Jul 5, 2007·Biological cybernetics·Arjan Boonman, Joachim Ostwald
Sep 8, 2010·The Journal of the Acoustical Society of America·Holger R GoerlitzLutz Wiegrebe
Nov 14, 2012·The Journal of the Acoustical Society of America·Marla M HoltColleen Reichmuth
Apr 1, 2003·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·M Hübner, L Wiegrebe
Aug 30, 2008·The Journal of Experimental Biology·Holger R GoerlitzBjörn M Siemers
Sep 1, 2006·The Journal of Experimental Biology·Ralph SimonOtto von Helversen
Dec 16, 2005·The Journal of Experimental Biology·Maike SchuchmannLutz Wiegrebe
Jul 1, 2006·The Journal of Experimental Biology·J R Barber, W E Conner