Sleep in the harp seal ( Pagophilus groenlandica). Comparison of sleep on land and in water
SUMMARY Four young harp seals (aged three to five months) were implanted with electrodes for recording electrocorticograms (ECoG) of the two hemispheres, and electrocardiogram, electroculogram, and electromyogram of the neck muscles. In all the seals ECoG slow waves developed simultaneously in both...
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crwiley:10.1111/j.1365-2869.1993.tb00082.x 2024-06-02T08:07:48+00:00 Sleep in the harp seal ( Pagophilus groenlandica). Comparison of sleep on land and in water LYAMIN, OLEG I. 1993 http://dx.doi.org/10.1111/j.1365-2869.1993.tb00082.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2869.1993.tb00082.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2869.1993.tb00082.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Sleep Research volume 2, issue 3, page 170-174 ISSN 0962-1105 1365-2869 journal-article 1993 crwiley https://doi.org/10.1111/j.1365-2869.1993.tb00082.x 2024-05-03T11:26:49Z SUMMARY Four young harp seals (aged three to five months) were implanted with electrodes for recording electrocorticograms (ECoG) of the two hemispheres, and electrocardiogram, electroculogram, and electromyogram of the neck muscles. In all the seals ECoG slow waves developed simultaneously in both hemispheres, irrespective of whether they slept on land, on the water surface or submerged. Slow‐wave sleep (SWS) was present in animals on the water surface and submerged, while paradoxical sleep (PS) occurred only when the animals were submerged. Breathing in SWS could be both regular (pauses less than twenty seconds) and intermittent (pauses lasting up to three minutes alternating with hyperventilation periods). All the PS episodes occurred during single respiratory pauses and ended by waking while the seal ascended to the water surface to breathe. Flipper movements were sometimes observed in SWS, but never in PS. The ability of harp seals to cease respiration during sleep and to sleep under water could be an adaptation to living conditons in the freezing seas. Article in Journal/Newspaper Harp Seal Wiley Online Library Journal of Sleep Research 2 3 170 174 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
SUMMARY Four young harp seals (aged three to five months) were implanted with electrodes for recording electrocorticograms (ECoG) of the two hemispheres, and electrocardiogram, electroculogram, and electromyogram of the neck muscles. In all the seals ECoG slow waves developed simultaneously in both hemispheres, irrespective of whether they slept on land, on the water surface or submerged. Slow‐wave sleep (SWS) was present in animals on the water surface and submerged, while paradoxical sleep (PS) occurred only when the animals were submerged. Breathing in SWS could be both regular (pauses less than twenty seconds) and intermittent (pauses lasting up to three minutes alternating with hyperventilation periods). All the PS episodes occurred during single respiratory pauses and ended by waking while the seal ascended to the water surface to breathe. Flipper movements were sometimes observed in SWS, but never in PS. The ability of harp seals to cease respiration during sleep and to sleep under water could be an adaptation to living conditons in the freezing seas. |
format |
Article in Journal/Newspaper |
author |
LYAMIN, OLEG I. |
spellingShingle |
LYAMIN, OLEG I. Sleep in the harp seal ( Pagophilus groenlandica). Comparison of sleep on land and in water |
author_facet |
LYAMIN, OLEG I. |
author_sort |
LYAMIN, OLEG I. |
title |
Sleep in the harp seal ( Pagophilus groenlandica). Comparison of sleep on land and in water |
title_short |
Sleep in the harp seal ( Pagophilus groenlandica). Comparison of sleep on land and in water |
title_full |
Sleep in the harp seal ( Pagophilus groenlandica). Comparison of sleep on land and in water |
title_fullStr |
Sleep in the harp seal ( Pagophilus groenlandica). Comparison of sleep on land and in water |
title_full_unstemmed |
Sleep in the harp seal ( Pagophilus groenlandica). Comparison of sleep on land and in water |
title_sort |
sleep in the harp seal ( pagophilus groenlandica). comparison of sleep on land and in water |
publisher |
Wiley |
publishDate |
1993 |
url |
http://dx.doi.org/10.1111/j.1365-2869.1993.tb00082.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2869.1993.tb00082.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2869.1993.tb00082.x |
genre |
Harp Seal |
genre_facet |
Harp Seal |
op_source |
Journal of Sleep Research volume 2, issue 3, page 170-174 ISSN 0962-1105 1365-2869 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2869.1993.tb00082.x |
container_title |
Journal of Sleep Research |
container_volume |
2 |
container_issue |
3 |
container_start_page |
170 |
op_container_end_page |
174 |
_version_ |
1800752936076181504 |