Heart rate during breath-holding and diving in the unrestrained harbor seal ( Phoca vitulina richardi)
Heart rate and breathing movements have been monitored in three unrestrained harbor seals. On voluntary submergence heart rate fell markedly in all seals, and after 2–3 s submergence stabilized at about 40–50% of the predive level. Heart rate increased before the animals broke surface at the end of...
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Canadian Science Publishing
1973
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crcansciencepubl:10.1139/z73-101 2024-09-15T18:10:40+00:00 Heart rate during breath-holding and diving in the unrestrained harbor seal ( Phoca vitulina richardi) Jones, David R. Fisher, H. Dean McTaggart, Susan West, Nigel H. 1973 http://dx.doi.org/10.1139/z73-101 http://www.nrcresearchpress.com/doi/pdf/10.1139/z73-101 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 51, issue 7, page 671-680 ISSN 0008-4301 1480-3283 journal-article 1973 crcansciencepubl https://doi.org/10.1139/z73-101 2024-08-29T04:08:49Z Heart rate and breathing movements have been monitored in three unrestrained harbor seals. On voluntary submergence heart rate fell markedly in all seals, and after 2–3 s submergence stabilized at about 40–50% of the predive level. Heart rate increased before the animals broke surface at the end of the dive and, when breathing began again, a postdive tachycardia was observed. Two of the three seals frequently showed anticipation of the dive as judged from their heart-rate response. Heart rate during feeding dives was generally more variable; in fact one seal exhibited no bradycardia in 20% of its feeding dives, although another seal showed a significantly greater bradycardia than was seen in routine dives. When breathing rate was low (less than five breaths min −1) respiratory variations in the heart rate occurred, although the onset of bradycardia was much more rapid during diving than during breath-holding. Because of the flexibility of the response it is concluded that the generation of diving bradycardia in the seal is a complex phenomenon which, aside from any responses set in train by peripheral receptors, must also involve some form of associative learning. Article in Journal/Newspaper harbor seal Phoca vitulina Canadian Science Publishing Canadian Journal of Zoology 51 7 671 680 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Heart rate and breathing movements have been monitored in three unrestrained harbor seals. On voluntary submergence heart rate fell markedly in all seals, and after 2–3 s submergence stabilized at about 40–50% of the predive level. Heart rate increased before the animals broke surface at the end of the dive and, when breathing began again, a postdive tachycardia was observed. Two of the three seals frequently showed anticipation of the dive as judged from their heart-rate response. Heart rate during feeding dives was generally more variable; in fact one seal exhibited no bradycardia in 20% of its feeding dives, although another seal showed a significantly greater bradycardia than was seen in routine dives. When breathing rate was low (less than five breaths min −1) respiratory variations in the heart rate occurred, although the onset of bradycardia was much more rapid during diving than during breath-holding. Because of the flexibility of the response it is concluded that the generation of diving bradycardia in the seal is a complex phenomenon which, aside from any responses set in train by peripheral receptors, must also involve some form of associative learning. |
format |
Article in Journal/Newspaper |
author |
Jones, David R. Fisher, H. Dean McTaggart, Susan West, Nigel H. |
spellingShingle |
Jones, David R. Fisher, H. Dean McTaggart, Susan West, Nigel H. Heart rate during breath-holding and diving in the unrestrained harbor seal ( Phoca vitulina richardi) |
author_facet |
Jones, David R. Fisher, H. Dean McTaggart, Susan West, Nigel H. |
author_sort |
Jones, David R. |
title |
Heart rate during breath-holding and diving in the unrestrained harbor seal ( Phoca vitulina richardi) |
title_short |
Heart rate during breath-holding and diving in the unrestrained harbor seal ( Phoca vitulina richardi) |
title_full |
Heart rate during breath-holding and diving in the unrestrained harbor seal ( Phoca vitulina richardi) |
title_fullStr |
Heart rate during breath-holding and diving in the unrestrained harbor seal ( Phoca vitulina richardi) |
title_full_unstemmed |
Heart rate during breath-holding and diving in the unrestrained harbor seal ( Phoca vitulina richardi) |
title_sort |
heart rate during breath-holding and diving in the unrestrained harbor seal ( phoca vitulina richardi) |
publisher |
Canadian Science Publishing |
publishDate |
1973 |
url |
http://dx.doi.org/10.1139/z73-101 http://www.nrcresearchpress.com/doi/pdf/10.1139/z73-101 |
genre |
harbor seal Phoca vitulina |
genre_facet |
harbor seal Phoca vitulina |
op_source |
Canadian Journal of Zoology volume 51, issue 7, page 671-680 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z73-101 |
container_title |
Canadian Journal of Zoology |
container_volume |
51 |
container_issue |
7 |
container_start_page |
671 |
op_container_end_page |
680 |
_version_ |
1810448250244694016 |