Expectancy and conditioned hearing levels in the bottlenose dolphin (Tursiops truncatus)

The Journal of Experimental Biology
Paul E NachtigallAude F Pacini

Abstract

The hearing sensitivity of a bottlenose dolphin for a warning sound, when the exact time of the arrival of a loud sound could or could not be predicted, was measured. Sensitivity was measured when the time of onset of the loud sound was randomly varied (random-variation sessions) and when the time of onset of the loud sound and the pattern of stimulus levels was constant (fixed-stimulus sessions). The loud sound was kept the same in both of the series. The mean duration and mean range of the levels of the test/warning signal were also kept equal across experimental sessions. Hearing sensitivity was measured using the auditory evoked potential method with rhythmic trains of short pips as test stimuli. With randomly varied warning sounds, thresholds before the loud sound were on average 10.6 dB higher than the baseline thresholds. With fixed warning signals, thresholds were on average 4.4 dB higher than the baseline thresholds. Considering that the loud sounds were identical, the difference between the random-variation and the fixed-stimulus sessions cannot be explained by a direct (unconditioned) influence of sound exposure. Therefore, the data provide reliable evidence for the conditioning nature of the hearing-dampening effect...Continue Reading

References

Aug 29, 2003·The Journal of the Acoustical Society of America·Bertel MøhlAnders Lund
Jan 8, 2008·The Journal of the Acoustical Society of America·Alexander Ya SupinMarlee Breese
Nov 8, 2012·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Alexander Ya Supin, Paul E Nachtigall
Apr 27, 2013·The Journal of Experimental Biology·Paul E Nachtigall, Alexander Ya Supin
May 24, 2014·The Journal of Experimental Biology·Paul E Nachtigall, Alexander Ya Supin
Feb 7, 2015·The Journal of Experimental Biology·Paul E Nachtigall, Alexander Ya Supin
Dec 15, 2015·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Paul E NachtigallAude F Pacini

❮ Previous
Next ❯

Citations

Sep 3, 2016·The Journal of the Acoustical Society of America·Paul E NachtigallRonald A Kastelein
Oct 31, 2016·The Journal of the Acoustical Society of America·Colleen ReichmuthBrandon L Southall
Oct 28, 2017·Integrative Zoology·Paul E NachtigallRonald A Kastelein
Mar 14, 2020·The Journal of Experimental Biology·Thomas GötzVincent M Janik
Dec 3, 2020·The Journal of the Acoustical Society of America·Jillian M SillsColleen Reichmuth
Jan 31, 2021·The Journal of the Acoustical Society of America·Kristian BeedholmPeter Teglberg Madsen
May 29, 2021·Frontiers in Cell and Developmental Biology·Zhongying WangZhiwu Huang

❮ Previous
Next ❯

Related Concepts

Related Feeds

Auditory Perception

Auditory perception is the ability to receive and interpret information attained by the ears. Here is the latest research on factors and underlying mechanisms that influence auditory perception.

Related Papers

The Journal of Experimental Biology
Paul E Nachtigall, Alexander Ya Supin
Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
Paul E NachtigallAude F Pacini
The American Journal of Physiology
W MEDWAY, J R GERACI
© 2022 Meta ULC. All rights reserved