Correlation of depth and heart rate in harbour seal pups
Harbour seal (Phoca vitulina L., 1758) pups are aquatically active from birth and have been shown to develop increased cardiac control throughout the nursing period. In an attempt to quantify and compare these developmental changes, data previously collected on pups in the St. Lawrence River estuary...
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crcansciencepubl:10.1139/z04-087 2024-04-28T08:23:02+00:00 Correlation of depth and heart rate in harbour seal pups Hicks, J L O'Hara Hines, R J Schreer, J F Hammill, M O 2004 http://dx.doi.org/10.1139/z04-087 http://www.nrcresearchpress.com/doi/pdf/10.1139/z04-087 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 82, issue 7, page 1147-1156 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 2004 crcansciencepubl https://doi.org/10.1139/z04-087 2024-04-09T06:56:28Z Harbour seal (Phoca vitulina L., 1758) pups are aquatically active from birth and have been shown to develop increased cardiac control throughout the nursing period. In an attempt to quantify and compare these developmental changes, data previously collected on pups in the St. Lawrence River estuary, Quebec, Canada, were analyzed. Time–depth recorders and heart-rate recorders were employed on eight pups to obtain depth and heart-rate measurements simultaneously. Analyses involved partitioning the data into intervals of surface–dive–surface. These intervals were then allocated into nine consecutive segments: presurface, predive surface, descent, prebottom, bottom, postbottom, ascent, postdive surface, and postsurface. Mean heart rate for each segment was then correlated with the mean depth per segment and overall dive duration. With increasing dive depth, a decrease in heart-rate variability with age was observed. There was no apparent relationship between mean heart rate during the dive and overall dive duration. The proportion of time spent in the lower heart-rate mode was observed to increase with age during most phases of a dive. Relative changes in mean heart rate between consecutive dive segments indicated an initial decrease in mean heart rate prior to submersion and an increasing trend before surfacing. These findings indicate that harbour seal pups develop increased cardiac control prior to weaning and that anticipatory cardiac responses to diving and surfacing (bradycardia and tachycardia, respectively) may be evident. Article in Journal/Newspaper harbour seal Phoca vitulina Canadian Science Publishing Canadian Journal of Zoology 82 7 1147 1156 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Hicks, J L O'Hara Hines, R J Schreer, J F Hammill, M O Correlation of depth and heart rate in harbour seal pups |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Harbour seal (Phoca vitulina L., 1758) pups are aquatically active from birth and have been shown to develop increased cardiac control throughout the nursing period. In an attempt to quantify and compare these developmental changes, data previously collected on pups in the St. Lawrence River estuary, Quebec, Canada, were analyzed. Time–depth recorders and heart-rate recorders were employed on eight pups to obtain depth and heart-rate measurements simultaneously. Analyses involved partitioning the data into intervals of surface–dive–surface. These intervals were then allocated into nine consecutive segments: presurface, predive surface, descent, prebottom, bottom, postbottom, ascent, postdive surface, and postsurface. Mean heart rate for each segment was then correlated with the mean depth per segment and overall dive duration. With increasing dive depth, a decrease in heart-rate variability with age was observed. There was no apparent relationship between mean heart rate during the dive and overall dive duration. The proportion of time spent in the lower heart-rate mode was observed to increase with age during most phases of a dive. Relative changes in mean heart rate between consecutive dive segments indicated an initial decrease in mean heart rate prior to submersion and an increasing trend before surfacing. These findings indicate that harbour seal pups develop increased cardiac control prior to weaning and that anticipatory cardiac responses to diving and surfacing (bradycardia and tachycardia, respectively) may be evident. |
format |
Article in Journal/Newspaper |
author |
Hicks, J L O'Hara Hines, R J Schreer, J F Hammill, M O |
author_facet |
Hicks, J L O'Hara Hines, R J Schreer, J F Hammill, M O |
author_sort |
Hicks, J L |
title |
Correlation of depth and heart rate in harbour seal pups |
title_short |
Correlation of depth and heart rate in harbour seal pups |
title_full |
Correlation of depth and heart rate in harbour seal pups |
title_fullStr |
Correlation of depth and heart rate in harbour seal pups |
title_full_unstemmed |
Correlation of depth and heart rate in harbour seal pups |
title_sort |
correlation of depth and heart rate in harbour seal pups |
publisher |
Canadian Science Publishing |
publishDate |
2004 |
url |
http://dx.doi.org/10.1139/z04-087 http://www.nrcresearchpress.com/doi/pdf/10.1139/z04-087 |
genre |
harbour seal Phoca vitulina |
genre_facet |
harbour seal Phoca vitulina |
op_source |
Canadian Journal of Zoology volume 82, issue 7, page 1147-1156 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z04-087 |
container_title |
Canadian Journal of Zoology |
container_volume |
82 |
container_issue |
7 |
container_start_page |
1147 |
op_container_end_page |
1156 |
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1797584260052287488 |