Noise-induced temporary threshold shift and recovery in Yangtze finless porpoises <i>Neophocaena phocaenoides asiaeorientalis</i>

Vv, Popov; Supin, Alexander Ya.; Wang, Ding; Wang, Kexiong; Dong, Lijun; Wang, Shiyong

doi:10.1121/1.3596470

Cited by 42 publications

(33 citation statements)

References 21 publications

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“…the higher the fatiguing sound frequency, the higher the TTS. Popov et al (Popov et al, 2011) found the highest fatiguing effect for 22.5kHz noise on the 32kHz probe and the lowest effect for the 90kHz noise on the 128kHz probe in N. phocaenoides, i.e. the higher the frequency, the lower the TTS.…”

Section: Dependence Of Tts On Fatiguing Sound Frequencymentioning

confidence: 97%

“…the higher the fatiguing sound frequency, the higher the TTS). Popov et al (Popov et al, 2011) observed an opposing regularity in N. phocaenoides: the strongest noise effect (both the highest TTS and the longest recovery) was observed for the 22.5kHz noise and 32kHz probe, whereas the least significant effect was observed at the 90kHz noise and 128kHz probe (i.e. the lower the frequency, the greater the effect).…”

Section: The Dependence Of Tts On Fatiguing Sound Frequency and Bandwmentioning

confidence: 97%

“…Several investigations in odontocetes have confirmed this regularity. Despite the variety of experimental conditions, the investigations have indicated that the highest TTS appeared at test frequencies above the fatiguing sound frequency, roughly 0.5 to 1octave Nachtigall et al, 2004;Finneran et al, 2007;Lucke et al, 2009;Mooney et al, 2009;Popov et al, 2011).…”

Section: Across-frequency Spread Of Ttsmentioning

confidence: 99%

“…A wide variety of fatiguing sounds has been used in different investigations: short wide-band pulses imitating distant explosions or seismic airgun impulses (Finneran et al, 2002;Lucke et al, 2009), band-passed noise (Nachtigall et al, 2003;Nachtigall et al, 2004;Mooney et al, 2009;Popov et al, 2011) and pure tones of various frequencies Finneran et al, 2007;Finneran et al, 2010a;Finneran et al, 2010b). The majority of the investigations used only one type of fatiguing sound and therefore could not demonstrate any dependence of TTS on the frequency of the fatiguing sound.…”

Section: The Dependence Of Tts On Fatiguing Sound Frequency and Bandwmentioning

confidence: 99%

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Hearing threshold shifts and recovery after noise exposure in beluga whales, Delphinapterus leucas

Supin

Рожнов

et al. 2013

Journal of Experimental Biology

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SUMMARYTemporary threshold shift (TTS) after loud noise exposure was investigated in a male and a female beluga whale (Delphinapterus leucas). The thresholds were evaluated using the evoked-potential technique, which allowed for threshold tracing with a resolution of ~1min. The fatiguing noise had a 0.5octave bandwidth, with center frequencies ranging from 11.2 to 90kHz, a level of 165dBre.1μPa and exposure durations from 1 to 30min. The effects of the noise were tested at probe frequencies ranging from -0.5 to +1.5octaves relative to the noise center frequency. The effect was estimated in terms of both immediate (1.5min) postexposure TTS and recovery duration. The highest TTS with the longest recovery duration was produced by noises of lower frequencies (11.2 and 22.5kHz) and appeared at a test frequency of +0.5octave. At higher noise frequencies (45 and 90kHz), the TTS decreased. The TTS effect gradually increased with prolonged exposures ranging from 1 to 30min. There was a considerable TTS difference between the two subjects.

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Section: Dependence Of Tts On Fatiguing Sound Frequencymentioning

confidence: 97%

Section: The Dependence Of Tts On Fatiguing Sound Frequency and Bandwmentioning

confidence: 97%

Section: Across-frequency Spread Of Ttsmentioning

confidence: 99%

Section: The Dependence Of Tts On Fatiguing Sound Frequency and Bandwmentioning

confidence: 99%

See 2 more Smart Citations

Hearing threshold shifts and recovery after noise exposure in beluga whales, Delphinapterus leucas

Supin

Рожнов

et al. 2013

Journal of Experimental Biology

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“…210 dB re. 1 μPa 2 s (Finneran et al, 2000), 212-214 dB (Nachtigall et al, 2003) and 203-210 dB in the bottlenose dolphin, and more than 183 dB in the finless porpoise and beluga whale (Popov et al, 2011;Popov et al, 2013). So it was not surprising that each of the 172 dB re.…”

Section: Conditioned or Non-conditioned Effect?mentioning

confidence: 99%

Conditioned hearing sensitivity reduction in a bottlenose dolphin (Tursiops truncatus)

Nachtigall

Supin

2014

Journal of Experimental Biology

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The conditioned change in hearing sensitivity during a warning sound preceding a loud sound was investigated in the bottlenose dolphin. Hearing sensitivity was measured using pip-train test stimuli and auditory evoked potential recording. When the test/warning stimulus with a frequency of 22.5 or 32 kHz preceded the loud sound with a frequency of 22.5 kHz and a sound pressure level of 165 dB re. 1 μPa rms, hearing thresholds before the loud sound increased relative to the baseline. The threshold increased up to 15 dB. In order to further investigate whether the observed threshold increase was due to conditioning, the dependence of the effect on warning duration and inter-trial interval was investigated. The duration of the warning substantially influenced the effect. Shorter warnings resulted in deeper suppression of responses and higher threshold increases than longer warnings. In contrast, the effect was nearly independent of the duration of the inter-trial interval, i.e. it was independent of the delay from the loud sound to the test/warning sound in the subsequent trial. These data are considered as evidence that the observed hearing threshold increases were not a result of the unconditioned effect of the loud sound and were instead a manifestation of a conditioned dampening of hearing when the bottlenose dolphin anticipated the quick appearance of a loud sound in the same way as previously demonstrated in the false killer whale.

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Spatial–temporal variations in biosonar activity of Yangtze finless porpoise in the lower reaches of the Yangtze River and its correlation with underwater noise: Are quieter non‐shipping branches the remaining shelters?

Duan

et al. 2021

Aquatic Conservation

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Yangtze finless porpoise (YFP) is Critically Endangered, It relies on its biological sonar sensing system for important life activities. The rapid development of the Yangtze valley has brought busy shipping, which has resulted in increased noise. Two locations on the shipping channel and non‐shipping branch were selected. Passive acoustic monitoring was used to record the biosonar signals of porpoises and underwater noise. The number of click trains, echolocation encounters, buzzes and buzz ratios were counted and the root mean square sound pressure level of noise was calculated in five diel phases. A non‐parametric test was used to analyse the differences among different phases and between different locations. The aim of the study was to detect the spatial and temporal variations in the biosonar activity of YFPs and underwater noise between non‐shipping and shipping channels, and to provide scientific advice for YFP conservation. Significant spatial and temporal patterns were observed both in biosonar activity and noise. Average biosonar activity, including click trains, buzzes, buzz ratio and echolocation encounters, was higher in the non‐shipping channel than in the shipping channel, whereas the noise level was higher in the shipping channel than in the non‐shipping channel. In the non‐shipping channel, the buzz numbers and buzz ratios, indicators of porpoise feeding activity, were higher at night than during the day while the noise level was higher during the day than at night. These findings may be associated with the noise avoidance strategies of YFPs to adapt to the busy shipping on the Yangtze River. Maintaining the non‐shipping status of some branches of the Yangtze River can provide more shelters for the YFPs. Strengthening the measures for banning navigation at night or reducing the vessel speed at night throughout the entire year would improve the YFPs’ feeding success.

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Noise-induced temporary threshold shift and recovery in Yangtze finless porpoises Neophocaena phocaenoides asiaeorientalis

Cited by 42 publications

References 21 publications

Hearing threshold shifts and recovery after noise exposure in beluga whales, Delphinapterus leucas

Hearing threshold shifts and recovery after noise exposure in beluga whales, Delphinapterus leucas

Conditioned hearing sensitivity reduction in a bottlenose dolphin (Tursiops truncatus)

Spatial–temporal variations in biosonar activity of Yangtze finless porpoise in the lower reaches of the Yangtze River and its correlation with underwater noise: Are quieter non‐shipping branches the remaining shelters?

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