Paradoxical escape responses by narwhals ( Monodon monoceros )
Until recent declines in Arctic sea ice levels, narwhals (Monodon monoceros) have lived in relative isolation from human perturbation and sustained predation pressures. The resulting naïvety has made this cryptic, deep-diving cetacean highly susceptible to disturbance, although quantifiable effects...
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2017
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Online Access: | https://curis.ku.dk/portal/da/publications/paradoxical-escape-responses-by-narwhals-monodon-monoceros(7f2c5d22-c559-4438-b697-e117640e47e8).html https://doi.org/10.1126/science.aao2740 http://www.scopus.com/inward/record.url?scp=85037626845&partnerID=8YFLogxK |
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ftcopenhagenunip:oai:pure.atira.dk:publications/7f2c5d22-c559-4438-b697-e117640e47e8 2024-04-21T08:01:15+00:00 Paradoxical escape responses by narwhals ( Monodon monoceros ) Williams, Terrie M. Blackwell, Susanna B. Richter, Beau Sinding, Mikkel Holger Strander Heide-Jørgensen, Mads Peter 2017-12-08 https://curis.ku.dk/portal/da/publications/paradoxical-escape-responses-by-narwhals-monodon-monoceros(7f2c5d22-c559-4438-b697-e117640e47e8).html https://doi.org/10.1126/science.aao2740 http://www.scopus.com/inward/record.url?scp=85037626845&partnerID=8YFLogxK eng eng info:eu-repo/semantics/closedAccess Williams , T M , Blackwell , S B , Richter , B , Sinding , M H S & Heide-Jørgensen , M P 2017 , ' Paradoxical escape responses by narwhals ( Monodon monoceros ) ' , Science , vol. 358 , no. 6368 , pp. 1328-1331 . https://doi.org/10.1126/science.aao2740 article 2017 ftcopenhagenunip https://doi.org/10.1126/science.aao2740 2024-03-28T01:21:43Z Until recent declines in Arctic sea ice levels, narwhals (Monodon monoceros) have lived in relative isolation from human perturbation and sustained predation pressures. The resulting naïvety has made this cryptic, deep-diving cetacean highly susceptible to disturbance, although quantifiable effects have been lacking. We deployed a submersible, animal-borne electrocardiograph-accelerometer-depth recorder to monitor physiological and behavioral responses of East Greenland narwhals after release from net entanglement and stranding. Escaping narwhals displayed a paradoxical cardiovascular down-regulation (extreme bradycardia with heart rate ≤4 beats per minute) superimposed on exercise up-regulation (stroke frequency >25 strokes per minute and energetic costs three to six times the resting rate of energy expenditure) that rapidly depleted onboard oxygen stores. We attribute this unusual reaction to opposing cardiovascular signals—from diving, exercise, and neurocognitive fear responses—that challenge physiological homeostasis. Article in Journal/Newspaper East Greenland Greenland Monodon monoceros narwhal* Sea ice University of Copenhagen: Research Science 358 6368 1328 1331 |
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Open Polar |
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University of Copenhagen: Research |
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ftcopenhagenunip |
language |
English |
description |
Until recent declines in Arctic sea ice levels, narwhals (Monodon monoceros) have lived in relative isolation from human perturbation and sustained predation pressures. The resulting naïvety has made this cryptic, deep-diving cetacean highly susceptible to disturbance, although quantifiable effects have been lacking. We deployed a submersible, animal-borne electrocardiograph-accelerometer-depth recorder to monitor physiological and behavioral responses of East Greenland narwhals after release from net entanglement and stranding. Escaping narwhals displayed a paradoxical cardiovascular down-regulation (extreme bradycardia with heart rate ≤4 beats per minute) superimposed on exercise up-regulation (stroke frequency >25 strokes per minute and energetic costs three to six times the resting rate of energy expenditure) that rapidly depleted onboard oxygen stores. We attribute this unusual reaction to opposing cardiovascular signals—from diving, exercise, and neurocognitive fear responses—that challenge physiological homeostasis. |
format |
Article in Journal/Newspaper |
author |
Williams, Terrie M. Blackwell, Susanna B. Richter, Beau Sinding, Mikkel Holger Strander Heide-Jørgensen, Mads Peter |
spellingShingle |
Williams, Terrie M. Blackwell, Susanna B. Richter, Beau Sinding, Mikkel Holger Strander Heide-Jørgensen, Mads Peter Paradoxical escape responses by narwhals ( Monodon monoceros ) |
author_facet |
Williams, Terrie M. Blackwell, Susanna B. Richter, Beau Sinding, Mikkel Holger Strander Heide-Jørgensen, Mads Peter |
author_sort |
Williams, Terrie M. |
title |
Paradoxical escape responses by narwhals ( Monodon monoceros ) |
title_short |
Paradoxical escape responses by narwhals ( Monodon monoceros ) |
title_full |
Paradoxical escape responses by narwhals ( Monodon monoceros ) |
title_fullStr |
Paradoxical escape responses by narwhals ( Monodon monoceros ) |
title_full_unstemmed |
Paradoxical escape responses by narwhals ( Monodon monoceros ) |
title_sort |
paradoxical escape responses by narwhals ( monodon monoceros ) |
publishDate |
2017 |
url |
https://curis.ku.dk/portal/da/publications/paradoxical-escape-responses-by-narwhals-monodon-monoceros(7f2c5d22-c559-4438-b697-e117640e47e8).html https://doi.org/10.1126/science.aao2740 http://www.scopus.com/inward/record.url?scp=85037626845&partnerID=8YFLogxK |
genre |
East Greenland Greenland Monodon monoceros narwhal* Sea ice |
genre_facet |
East Greenland Greenland Monodon monoceros narwhal* Sea ice |
op_source |
Williams , T M , Blackwell , S B , Richter , B , Sinding , M H S & Heide-Jørgensen , M P 2017 , ' Paradoxical escape responses by narwhals ( Monodon monoceros ) ' , Science , vol. 358 , no. 6368 , pp. 1328-1331 . https://doi.org/10.1126/science.aao2740 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1126/science.aao2740 |
container_title |
Science |
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358 |
container_issue |
6368 |
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1328 |
op_container_end_page |
1331 |
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1796941515750113280 |