Heart rate and startle responses in diving, captive harbour porpoises (Phocoena phocoena) exposed to transient noise and sonar
Anthropogenic noise can alter marine mammal behaviour and physiology, but little is known about cetacean cardiovascular responses to exposures, despite evidence that acoustic stressors, such as naval sonars, may lead to decompression sickness. Here, we measured heart rate and movements of two traine...
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The Company of Biologists
2021
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ftdoajarticles:oai:doaj.org/article:30d853b586d14ac8b52f56ec4603de42 2023-05-15T17:59:11+02:00 Heart rate and startle responses in diving, captive harbour porpoises (Phocoena phocoena) exposed to transient noise and sonar Siri L. Elmegaard Birgitte I. McDonald Jonas Teilmann Peter T. Madsen 2021-06-01T00:00:00Z https://doi.org/10.1242/bio.058679 https://doaj.org/article/30d853b586d14ac8b52f56ec4603de42 EN eng The Company of Biologists http://bio.biologists.org/content/10/6/bio058679 https://doaj.org/toc/2046-6390 2046-6390 doi:10.1242/bio.058679 https://doaj.org/article/30d853b586d14ac8b52f56ec4603de42 Biology Open, Vol 10, Iss 6 (2021) exposure sonar acoustic startle reflex habituation Science Q Biology (General) QH301-705.5 article 2021 ftdoajarticles https://doi.org/10.1242/bio.058679 2022-12-31T05:56:59Z Anthropogenic noise can alter marine mammal behaviour and physiology, but little is known about cetacean cardiovascular responses to exposures, despite evidence that acoustic stressors, such as naval sonars, may lead to decompression sickness. Here, we measured heart rate and movements of two trained harbour porpoises during controlled exposure to 6–9 kHz sonar-like sweeps and 40 kHz peak-frequency noise pulses, designed to evoke acoustic startle responses. The porpoises initially responded to the sonar sweep with intensified bradycardia despite unaltered behaviour/movement, but habituated rapidly to the stimuli. In contrast, 40 kHz noise pulses consistently evoked rapid muscle flinches (indicative of startles), but no behavioural or heart rate changes. We conclude that the autonomous startle response appears decoupled from, or overridden by, cardiac regulation in diving porpoises, whereas certain novel stimuli may motivate oxygen-conserving cardiovascular measures. Such responses to sound exposure may contribute to gas mismanagement for deeper-diving cetaceans. Article in Journal/Newspaper Phocoena phocoena Directory of Open Access Journals: DOAJ Articles Biology Open 10 6 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
exposure sonar acoustic startle reflex habituation Science Q Biology (General) QH301-705.5 |
spellingShingle |
exposure sonar acoustic startle reflex habituation Science Q Biology (General) QH301-705.5 Siri L. Elmegaard Birgitte I. McDonald Jonas Teilmann Peter T. Madsen Heart rate and startle responses in diving, captive harbour porpoises (Phocoena phocoena) exposed to transient noise and sonar |
topic_facet |
exposure sonar acoustic startle reflex habituation Science Q Biology (General) QH301-705.5 |
description |
Anthropogenic noise can alter marine mammal behaviour and physiology, but little is known about cetacean cardiovascular responses to exposures, despite evidence that acoustic stressors, such as naval sonars, may lead to decompression sickness. Here, we measured heart rate and movements of two trained harbour porpoises during controlled exposure to 6–9 kHz sonar-like sweeps and 40 kHz peak-frequency noise pulses, designed to evoke acoustic startle responses. The porpoises initially responded to the sonar sweep with intensified bradycardia despite unaltered behaviour/movement, but habituated rapidly to the stimuli. In contrast, 40 kHz noise pulses consistently evoked rapid muscle flinches (indicative of startles), but no behavioural or heart rate changes. We conclude that the autonomous startle response appears decoupled from, or overridden by, cardiac regulation in diving porpoises, whereas certain novel stimuli may motivate oxygen-conserving cardiovascular measures. Such responses to sound exposure may contribute to gas mismanagement for deeper-diving cetaceans. |
format |
Article in Journal/Newspaper |
author |
Siri L. Elmegaard Birgitte I. McDonald Jonas Teilmann Peter T. Madsen |
author_facet |
Siri L. Elmegaard Birgitte I. McDonald Jonas Teilmann Peter T. Madsen |
author_sort |
Siri L. Elmegaard |
title |
Heart rate and startle responses in diving, captive harbour porpoises (Phocoena phocoena) exposed to transient noise and sonar |
title_short |
Heart rate and startle responses in diving, captive harbour porpoises (Phocoena phocoena) exposed to transient noise and sonar |
title_full |
Heart rate and startle responses in diving, captive harbour porpoises (Phocoena phocoena) exposed to transient noise and sonar |
title_fullStr |
Heart rate and startle responses in diving, captive harbour porpoises (Phocoena phocoena) exposed to transient noise and sonar |
title_full_unstemmed |
Heart rate and startle responses in diving, captive harbour porpoises (Phocoena phocoena) exposed to transient noise and sonar |
title_sort |
heart rate and startle responses in diving, captive harbour porpoises (phocoena phocoena) exposed to transient noise and sonar |
publisher |
The Company of Biologists |
publishDate |
2021 |
url |
https://doi.org/10.1242/bio.058679 https://doaj.org/article/30d853b586d14ac8b52f56ec4603de42 |
genre |
Phocoena phocoena |
genre_facet |
Phocoena phocoena |
op_source |
Biology Open, Vol 10, Iss 6 (2021) |
op_relation |
http://bio.biologists.org/content/10/6/bio058679 https://doaj.org/toc/2046-6390 2046-6390 doi:10.1242/bio.058679 https://doaj.org/article/30d853b586d14ac8b52f56ec4603de42 |
op_doi |
https://doi.org/10.1242/bio.058679 |
container_title |
Biology Open |
container_volume |
10 |
container_issue |
6 |
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1766167942728253440 |