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Temporary threshold shifts in naïve and experienced belugas: can dampening of the effects of fatiguing sounds be learned?
Popov, V.; Supin, A.Y.; Nechaev, D.; Sysueva, E.; Rozhnov, V.V. (2016). Temporary threshold shifts in naïve and experienced belugas: can dampening of the effects of fatiguing sounds be learned?, in: Popper, A.N. et al. (Ed.) The effects of noise on aquatic life II. Advances in Experimental Medicine and Biology, 875: pp. 853-859. hdl.handle.net/10.1007/978-1-4939-2981-8_105
In: Popper, A.N.; Hawkins, A. (Ed.) (2016). The effects of noise on aquatic life II. Advances in Experimental Medicine and Biology, 875. Springer Science+Business Media, Inc: New York. ISBN 978-1-4939-2980-1. xxx, 1292 pp., more
In: Advances in Experimental Medicine and Biology. Springer: Berlin. ISSN 0065-2598, more
Peer reviewed article  

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Keywords
    Odontocete Flower, 1865 [WoRMS]; Marine
Author keywords
    Temporary threshold shift

Authors  Top 
  • Popov, V.
  • Supin, A.Y.
  • Nechaev, D.
  • Sysueva, E.
  • Rozhnov, V.V.

Abstract
    In belugas (Delphinapterus leucas), substantial (10–15 dB) differences in temporary threshold shifts (TTSs) were observed between the first and subsequent experimental sessions in the same subjects. In the first session (naïve subject state), the TTSs produced by exposure to fatiguing noises were larger than the TTSs produced in subsequent sessions (experienced subject state). After one to two sessions, the TTSs stabilized. The baseline hearing thresholds did not differ between the naïve and experienced states. One possible explanation for this effect is that the animals learned to dampen their hearing during exposure to fatiguing noises and thus mitigate the impact of those noises.

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