Drivers of the dive response in trained harbour porpoises (Phocoena phocoena)
Pronounced dive responses through peripheral vasoconstriction and bradycardia enable prolonged apnoea in marine mammals. For most vertebrates, the dive response is initiated upon face immersion, but little is known about the physical drivers of diving and surfacing heart rate in cetaceans whose face...
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Online Access: | https://pure.au.dk/portal/en/publications/527ac4b4-f614-4555-86d8-3d15cb5f291f https://doi.org/10.1242/jeb.208637 https://pure.au.dk/ws/files/195219062/Drivers_of_the_dive_response_in_trained_harbour_porpoises_Phocoena_phocoena_.pdf http://www.scopus.com/inward/record.url?scp=85072905352&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/527ac4b4-f614-4555-86d8-3d15cb5f291f 2024-05-19T07:47:22+00:00 Drivers of the dive response in trained harbour porpoises (Phocoena phocoena) Elmegaard, Siri L. McDonald, Birgitte I. Madsen, Peter T. 2019 application/pdf https://pure.au.dk/portal/en/publications/527ac4b4-f614-4555-86d8-3d15cb5f291f https://doi.org/10.1242/jeb.208637 https://pure.au.dk/ws/files/195219062/Drivers_of_the_dive_response_in_trained_harbour_porpoises_Phocoena_phocoena_.pdf http://www.scopus.com/inward/record.url?scp=85072905352&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/527ac4b4-f614-4555-86d8-3d15cb5f291f info:eu-repo/semantics/openAccess Elmegaard , S L , McDonald , B I & Madsen , P T 2019 , ' Drivers of the dive response in trained harbour porpoises (Phocoena phocoena) ' , Journal of Experimental Biology , vol. 222 , no. 19 , jeb208637 . https://doi.org/10.1242/jeb.208637 Anticipation Bradycardia Cetacean Heart rate Submersion Tachycardia article 2019 ftuniaarhuspubl https://doi.org/10.1242/jeb.208637 2024-05-01T23:46:33Z Pronounced dive responses through peripheral vasoconstriction and bradycardia enable prolonged apnoea in marine mammals. For most vertebrates, the dive response is initiated upon face immersion, but little is known about the physical drivers of diving and surfacing heart rate in cetaceans whose faces are always mostly submerged. Using two trained harbour porpoises instrumented with an ECG-measuring sound-and-movement tag (DTAG-3), we investigated the initiation and progression of bradycardia and tachycardia during apnoea and eupnoea for varying levels of immersion. We show that paranasal wetting drives bradycardia initiation and progression, whereas apnoea leads to dive-level bradycardia eventually, but not instantly. At the end of dives, heart rate accelerates independently of lung expansion, perhaps in anticipation of surfacing; however, full tachycardia is only engaged upon inhalation. We conclude that breathing drives surface tachycardia, whereas blowhole wetting is an important driver of bradycardia; however, anticipatory/volitional modulation can overrule such responses to sensory inputs. Article in Journal/Newspaper Phocoena phocoena Aarhus University: Research Journal of Experimental Biology |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Anticipation Bradycardia Cetacean Heart rate Submersion Tachycardia |
spellingShingle |
Anticipation Bradycardia Cetacean Heart rate Submersion Tachycardia Elmegaard, Siri L. McDonald, Birgitte I. Madsen, Peter T. Drivers of the dive response in trained harbour porpoises (Phocoena phocoena) |
topic_facet |
Anticipation Bradycardia Cetacean Heart rate Submersion Tachycardia |
description |
Pronounced dive responses through peripheral vasoconstriction and bradycardia enable prolonged apnoea in marine mammals. For most vertebrates, the dive response is initiated upon face immersion, but little is known about the physical drivers of diving and surfacing heart rate in cetaceans whose faces are always mostly submerged. Using two trained harbour porpoises instrumented with an ECG-measuring sound-and-movement tag (DTAG-3), we investigated the initiation and progression of bradycardia and tachycardia during apnoea and eupnoea for varying levels of immersion. We show that paranasal wetting drives bradycardia initiation and progression, whereas apnoea leads to dive-level bradycardia eventually, but not instantly. At the end of dives, heart rate accelerates independently of lung expansion, perhaps in anticipation of surfacing; however, full tachycardia is only engaged upon inhalation. We conclude that breathing drives surface tachycardia, whereas blowhole wetting is an important driver of bradycardia; however, anticipatory/volitional modulation can overrule such responses to sensory inputs. |
format |
Article in Journal/Newspaper |
author |
Elmegaard, Siri L. McDonald, Birgitte I. Madsen, Peter T. |
author_facet |
Elmegaard, Siri L. McDonald, Birgitte I. Madsen, Peter T. |
author_sort |
Elmegaard, Siri L. |
title |
Drivers of the dive response in trained harbour porpoises (Phocoena phocoena) |
title_short |
Drivers of the dive response in trained harbour porpoises (Phocoena phocoena) |
title_full |
Drivers of the dive response in trained harbour porpoises (Phocoena phocoena) |
title_fullStr |
Drivers of the dive response in trained harbour porpoises (Phocoena phocoena) |
title_full_unstemmed |
Drivers of the dive response in trained harbour porpoises (Phocoena phocoena) |
title_sort |
drivers of the dive response in trained harbour porpoises (phocoena phocoena) |
publishDate |
2019 |
url |
https://pure.au.dk/portal/en/publications/527ac4b4-f614-4555-86d8-3d15cb5f291f https://doi.org/10.1242/jeb.208637 https://pure.au.dk/ws/files/195219062/Drivers_of_the_dive_response_in_trained_harbour_porpoises_Phocoena_phocoena_.pdf http://www.scopus.com/inward/record.url?scp=85072905352&partnerID=8YFLogxK |
genre |
Phocoena phocoena |
genre_facet |
Phocoena phocoena |
op_source |
Elmegaard , S L , McDonald , B I & Madsen , P T 2019 , ' Drivers of the dive response in trained harbour porpoises (Phocoena phocoena) ' , Journal of Experimental Biology , vol. 222 , no. 19 , jeb208637 . https://doi.org/10.1242/jeb.208637 |
op_relation |
https://pure.au.dk/portal/en/publications/527ac4b4-f614-4555-86d8-3d15cb5f291f |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1242/jeb.208637 |
container_title |
Journal of Experimental Biology |
_version_ |
1799487772244836352 |