Developmental aspects of sleep apnoea in northern elephant seals, Mirounga angustirostris
Northern elephant seals, Miroungu angustirostris , breathe irregularly while sleeping on land, alternating bouts of breath‐holding (apnoea) that can last up to 25 min with periods of breathing (eupnoea). Our aims were to quantify changes in this behaviour during development and to determine the corr...
Published in: | Journal of Zoology |
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Online Access: | http://dx.doi.org/10.1111/j.1469-7998.1993.tb01930.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.1993.tb01930.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1993.tb01930.x https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1993.tb01930.x |
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crwiley:10.1111/j.1469-7998.1993.tb01930.x 2024-06-02T08:06:02+00:00 Developmental aspects of sleep apnoea in northern elephant seals, Mirounga angustirostris Blackwell, Susanna B. Boeuf, B. J. Le 1993 http://dx.doi.org/10.1111/j.1469-7998.1993.tb01930.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.1993.tb01930.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1993.tb01930.x https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1993.tb01930.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Zoology volume 231, issue 3, page 437-447 ISSN 0952-8369 1469-7998 journal-article 1993 crwiley https://doi.org/10.1111/j.1469-7998.1993.tb01930.x 2024-05-03T10:50:37Z Northern elephant seals, Miroungu angustirostris , breathe irregularly while sleeping on land, alternating bouts of breath‐holding (apnoea) that can last up to 25 min with periods of breathing (eupnoea). Our aims were to quantify changes in this behaviour during development and to determine the correspondence between these ontogenetic changes and those independently recorded in the dive durations of free‐ranging seals. We observed 163 seals during periods of apparent sleep, ranging in age from new‐born to adult. at Año Nuevo, California. Mean length of apnoea and percentage time spent in apnoea were 3·1 min and 59%, in neonates (0–4 days old). These values decreased to 1·8 min and 37% in suckling pups (5–28 days old), then increased with age thereafter, reaching about 8·0 min and 60% in adults of both sexes. Sleep apnoea duration and percentage time spent in sleep apnoea increased most markedly after weaning, when the animals were learning to swim and dive. Mean sleep apnoea duration and mean dive duration increased in a similar way during the first year of life; thereafter. mean sleep apnoea duration reached an asymptote while mean dive duration continued to increase. We conclude that the elephant seal's ability to sustain long apnoeas is not only an adaptation for foraging underwater but also a means for conserving water and energy while fasting on land. Article in Journal/Newspaper Elephant Seals Wiley Online Library Journal of Zoology 231 3 437 447 |
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Wiley Online Library |
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English |
description |
Northern elephant seals, Miroungu angustirostris , breathe irregularly while sleeping on land, alternating bouts of breath‐holding (apnoea) that can last up to 25 min with periods of breathing (eupnoea). Our aims were to quantify changes in this behaviour during development and to determine the correspondence between these ontogenetic changes and those independently recorded in the dive durations of free‐ranging seals. We observed 163 seals during periods of apparent sleep, ranging in age from new‐born to adult. at Año Nuevo, California. Mean length of apnoea and percentage time spent in apnoea were 3·1 min and 59%, in neonates (0–4 days old). These values decreased to 1·8 min and 37% in suckling pups (5–28 days old), then increased with age thereafter, reaching about 8·0 min and 60% in adults of both sexes. Sleep apnoea duration and percentage time spent in sleep apnoea increased most markedly after weaning, when the animals were learning to swim and dive. Mean sleep apnoea duration and mean dive duration increased in a similar way during the first year of life; thereafter. mean sleep apnoea duration reached an asymptote while mean dive duration continued to increase. We conclude that the elephant seal's ability to sustain long apnoeas is not only an adaptation for foraging underwater but also a means for conserving water and energy while fasting on land. |
format |
Article in Journal/Newspaper |
author |
Blackwell, Susanna B. Boeuf, B. J. Le |
spellingShingle |
Blackwell, Susanna B. Boeuf, B. J. Le Developmental aspects of sleep apnoea in northern elephant seals, Mirounga angustirostris |
author_facet |
Blackwell, Susanna B. Boeuf, B. J. Le |
author_sort |
Blackwell, Susanna B. |
title |
Developmental aspects of sleep apnoea in northern elephant seals, Mirounga angustirostris |
title_short |
Developmental aspects of sleep apnoea in northern elephant seals, Mirounga angustirostris |
title_full |
Developmental aspects of sleep apnoea in northern elephant seals, Mirounga angustirostris |
title_fullStr |
Developmental aspects of sleep apnoea in northern elephant seals, Mirounga angustirostris |
title_full_unstemmed |
Developmental aspects of sleep apnoea in northern elephant seals, Mirounga angustirostris |
title_sort |
developmental aspects of sleep apnoea in northern elephant seals, mirounga angustirostris |
publisher |
Wiley |
publishDate |
1993 |
url |
http://dx.doi.org/10.1111/j.1469-7998.1993.tb01930.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1469-7998.1993.tb01930.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1993.tb01930.x https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1469-7998.1993.tb01930.x |
genre |
Elephant Seals |
genre_facet |
Elephant Seals |
op_source |
Journal of Zoology volume 231, issue 3, page 437-447 ISSN 0952-8369 1469-7998 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1469-7998.1993.tb01930.x |
container_title |
Journal of Zoology |
container_volume |
231 |
container_issue |
3 |
container_start_page |
437 |
op_container_end_page |
447 |
_version_ |
1800750919093059584 |