Dive heart rate in harbour porpoises is influenced by exercise and expectations
The dive response, a decrease in heart rate (ƒ H ) and peripheral vasoconstriction, is the key mechanism allowing breath-hold divers to perform long duration dives. This pronounced cardiovascular response to diving has been investigated intensely in pinnipeds, but comparatively little is known for c...
Published in: | Journal of Experimental Biology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2018
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/dive-heart-rate-in-harbour-porpoises-is-influenced-by-exercise-and-expectations(3895a256-ef38-4ae2-be0d-ac2fc2f0ba04).html https://doi.org/10.1242/jeb.168740 https://research-repository.st-andrews.ac.uk/bitstream/10023/16420/1/Johnson_2017_JEB_Diveheartrate_AAM.pdf http://jeb.biologists.org/content/early/2017/11/08/jeb.168740 |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/3895a256-ef38-4ae2-be0d-ac2fc2f0ba04 2023-05-15T16:33:22+02:00 Dive heart rate in harbour porpoises is influenced by exercise and expectations McDonald, Brigitte Johnson, Mark Madsen, Peter 2018-01-09 application/pdf https://risweb.st-andrews.ac.uk/portal/en/researchoutput/dive-heart-rate-in-harbour-porpoises-is-influenced-by-exercise-and-expectations(3895a256-ef38-4ae2-be0d-ac2fc2f0ba04).html https://doi.org/10.1242/jeb.168740 https://research-repository.st-andrews.ac.uk/bitstream/10023/16420/1/Johnson_2017_JEB_Diveheartrate_AAM.pdf http://jeb.biologists.org/content/early/2017/11/08/jeb.168740 eng eng info:eu-repo/semantics/openAccess McDonald , B , Johnson , M & Madsen , P 2018 , ' Dive heart rate in harbour porpoises is influenced by exercise and expectations ' , Journal of Experimental Biology , vol. 221 , no. 1 , jeb168740 . https://doi.org/10.1242/jeb.168740 Diving physiology Bradycardia Dive response Harbour porpoise Heart rate regulation Exercise article 2018 ftunstandrewcris https://doi.org/10.1242/jeb.168740 2022-10-31T06:43:42Z The dive response, a decrease in heart rate (ƒ H ) and peripheral vasoconstriction, is the key mechanism allowing breath-hold divers to perform long duration dives. This pronounced cardiovascular response to diving has been investigated intensely in pinnipeds, but comparatively little is known for cetaceans, in particular in ecologically relevant settings. Here we studied the dive ƒ H response in one the smallest cetaceans, the harbour porpoise ( Phocoena phocoena ). We used a novel multi-sensor data logger to record dive behaviour, ƒ H , ventilations and feeding events in three trained porpoises, providing the first evaluation of cetacean ƒ H regulation while performing a variety of natural behaviours, including prey capture. We predicted that tagged harbour porpoises would exhibit a decrease in ƒ H in all dives, but the degree of bradycardia would be influenced by dive duration and activity, i.e., the dive ƒ H response will be exercise modulated. In all dives, ƒ H decreased compared to surface rates by at least 50% (mean maximum surface=173 beats min −1 , mean minimum dive=50 beats min −1 ); however, dive ƒ H was approximately 10 beats min −1 higher in active dives due to a slower decrease in ƒ H and more variable ƒ H during pursuit of prey. We show that porpoises exhibit the typical breath-hold diver bradycardia during aerobic dives and that the heart rate response is modulated by exercise and dive duration; however, other variables such as expectations and individual differences are equally important in determining diving heart rate. Article in Journal/Newspaper Harbour porpoise Phocoena phocoena University of St Andrews: Research Portal Journal of Experimental Biology |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Diving physiology Bradycardia Dive response Harbour porpoise Heart rate regulation Exercise |
spellingShingle |
Diving physiology Bradycardia Dive response Harbour porpoise Heart rate regulation Exercise McDonald, Brigitte Johnson, Mark Madsen, Peter Dive heart rate in harbour porpoises is influenced by exercise and expectations |
topic_facet |
Diving physiology Bradycardia Dive response Harbour porpoise Heart rate regulation Exercise |
description |
The dive response, a decrease in heart rate (ƒ H ) and peripheral vasoconstriction, is the key mechanism allowing breath-hold divers to perform long duration dives. This pronounced cardiovascular response to diving has been investigated intensely in pinnipeds, but comparatively little is known for cetaceans, in particular in ecologically relevant settings. Here we studied the dive ƒ H response in one the smallest cetaceans, the harbour porpoise ( Phocoena phocoena ). We used a novel multi-sensor data logger to record dive behaviour, ƒ H , ventilations and feeding events in three trained porpoises, providing the first evaluation of cetacean ƒ H regulation while performing a variety of natural behaviours, including prey capture. We predicted that tagged harbour porpoises would exhibit a decrease in ƒ H in all dives, but the degree of bradycardia would be influenced by dive duration and activity, i.e., the dive ƒ H response will be exercise modulated. In all dives, ƒ H decreased compared to surface rates by at least 50% (mean maximum surface=173 beats min −1 , mean minimum dive=50 beats min −1 ); however, dive ƒ H was approximately 10 beats min −1 higher in active dives due to a slower decrease in ƒ H and more variable ƒ H during pursuit of prey. We show that porpoises exhibit the typical breath-hold diver bradycardia during aerobic dives and that the heart rate response is modulated by exercise and dive duration; however, other variables such as expectations and individual differences are equally important in determining diving heart rate. |
format |
Article in Journal/Newspaper |
author |
McDonald, Brigitte Johnson, Mark Madsen, Peter |
author_facet |
McDonald, Brigitte Johnson, Mark Madsen, Peter |
author_sort |
McDonald, Brigitte |
title |
Dive heart rate in harbour porpoises is influenced by exercise and expectations |
title_short |
Dive heart rate in harbour porpoises is influenced by exercise and expectations |
title_full |
Dive heart rate in harbour porpoises is influenced by exercise and expectations |
title_fullStr |
Dive heart rate in harbour porpoises is influenced by exercise and expectations |
title_full_unstemmed |
Dive heart rate in harbour porpoises is influenced by exercise and expectations |
title_sort |
dive heart rate in harbour porpoises is influenced by exercise and expectations |
publishDate |
2018 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/dive-heart-rate-in-harbour-porpoises-is-influenced-by-exercise-and-expectations(3895a256-ef38-4ae2-be0d-ac2fc2f0ba04).html https://doi.org/10.1242/jeb.168740 https://research-repository.st-andrews.ac.uk/bitstream/10023/16420/1/Johnson_2017_JEB_Diveheartrate_AAM.pdf http://jeb.biologists.org/content/early/2017/11/08/jeb.168740 |
genre |
Harbour porpoise Phocoena phocoena |
genre_facet |
Harbour porpoise Phocoena phocoena |
op_source |
McDonald , B , Johnson , M & Madsen , P 2018 , ' Dive heart rate in harbour porpoises is influenced by exercise and expectations ' , Journal of Experimental Biology , vol. 221 , no. 1 , jeb168740 . https://doi.org/10.1242/jeb.168740 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1242/jeb.168740 |
container_title |
Journal of Experimental Biology |
_version_ |
1766023064514985984 |