Circadian rhythmicity persists through the Polar night and midnight sun in Svalbard reindeer
Studies of locomotor activity in Svalbard reindeer reported the temporary absence of diel rhythms under Arctic photic conditions. However, using Lomb-Scargle periodogram analyses with high statistical power we found diel or circadian rhythmicity throughout the entire year in measures of behaviour, t...
Published in: | Scientific Reports |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2018
|
Subjects: | |
Online Access: | http://hdl.handle.net/11250/2572989 https://doi.org/10.1038/s41598-018-32778-4 |
id |
ftninstnf:oai:brage.nina.no:11250/2572989 |
---|---|
record_format |
openpolar |
spelling |
ftninstnf:oai:brage.nina.no:11250/2572989 2023-05-15T14:57:48+02:00 Circadian rhythmicity persists through the Polar night and midnight sun in Svalbard reindeer Arnold, Walter Ruf, Thomas Loe, Leif Egil Irvine, R. Justin Ropstad, Erik Veiberg, Vebjørn Albon, Steve D. Svalbard 2018 application/pdf http://hdl.handle.net/11250/2572989 https://doi.org/10.1038/s41598-018-32778-4 eng eng Norges forskningsråd: 223257 Egen institusjon: Norwegian institute for nature research (NINA) urn:issn:2045-2322 http://hdl.handle.net/11250/2572989 https://doi.org/10.1038/s41598-018-32778-4 cristin:1615316 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © The Author(s) 2018 CC-BY 8 Scientific Reports VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Journal article Peer reviewed 2018 ftninstnf https://doi.org/10.1038/s41598-018-32778-4 2021-12-23T07:16:49Z Studies of locomotor activity in Svalbard reindeer reported the temporary absence of diel rhythms under Arctic photic conditions. However, using Lomb-Scargle periodogram analyses with high statistical power we found diel or circadian rhythmicity throughout the entire year in measures of behaviour, temperature in the rumen and heart rate in free-living Svalbard reindeer. Significant diel rhythmicity was only lacking during some of the 15-day intervals analysed in the less frequently measured heart rate. During Polar Night these rhythms were free-running and attenuated. During continual daylight in summer, rhythms where entrained to 24 hours corresponding with the daily variation in the intensity of solar radiation, but attenuated when continuous daylight coincided with the period of growing forage. Diel rhythmicity was reduced during this short period of peak foraging activity, which coincided with peak heart rate and temperature in the rumen, most likely to facilitate fattening when food is abundant. For the rest of the year, heart rate and temperature showed the most pronounced and long-lasting suppression ever found in ungulates. The profound seasonal changes in foraging, metabolic activity, and power of diel and circadian rhythmicity of Svalbard reindeer can be viewed as adaptations to the extreme living conditions in the High Arctic. publishedVersion Article in Journal/Newspaper Arctic polar night Svalbard svalbard reindeer midnight sun Norwegian Institute for Nature Research: Brage NINA Arctic Svalbard Scientific Reports 8 1 |
institution |
Open Polar |
collection |
Norwegian Institute for Nature Research: Brage NINA |
op_collection_id |
ftninstnf |
language |
English |
topic |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
spellingShingle |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 Arnold, Walter Ruf, Thomas Loe, Leif Egil Irvine, R. Justin Ropstad, Erik Veiberg, Vebjørn Albon, Steve D. Circadian rhythmicity persists through the Polar night and midnight sun in Svalbard reindeer |
topic_facet |
VDP::Zoologiske og botaniske fag: 480 VDP::Zoology and botany: 480 |
description |
Studies of locomotor activity in Svalbard reindeer reported the temporary absence of diel rhythms under Arctic photic conditions. However, using Lomb-Scargle periodogram analyses with high statistical power we found diel or circadian rhythmicity throughout the entire year in measures of behaviour, temperature in the rumen and heart rate in free-living Svalbard reindeer. Significant diel rhythmicity was only lacking during some of the 15-day intervals analysed in the less frequently measured heart rate. During Polar Night these rhythms were free-running and attenuated. During continual daylight in summer, rhythms where entrained to 24 hours corresponding with the daily variation in the intensity of solar radiation, but attenuated when continuous daylight coincided with the period of growing forage. Diel rhythmicity was reduced during this short period of peak foraging activity, which coincided with peak heart rate and temperature in the rumen, most likely to facilitate fattening when food is abundant. For the rest of the year, heart rate and temperature showed the most pronounced and long-lasting suppression ever found in ungulates. The profound seasonal changes in foraging, metabolic activity, and power of diel and circadian rhythmicity of Svalbard reindeer can be viewed as adaptations to the extreme living conditions in the High Arctic. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Arnold, Walter Ruf, Thomas Loe, Leif Egil Irvine, R. Justin Ropstad, Erik Veiberg, Vebjørn Albon, Steve D. |
author_facet |
Arnold, Walter Ruf, Thomas Loe, Leif Egil Irvine, R. Justin Ropstad, Erik Veiberg, Vebjørn Albon, Steve D. |
author_sort |
Arnold, Walter |
title |
Circadian rhythmicity persists through the Polar night and midnight sun in Svalbard reindeer |
title_short |
Circadian rhythmicity persists through the Polar night and midnight sun in Svalbard reindeer |
title_full |
Circadian rhythmicity persists through the Polar night and midnight sun in Svalbard reindeer |
title_fullStr |
Circadian rhythmicity persists through the Polar night and midnight sun in Svalbard reindeer |
title_full_unstemmed |
Circadian rhythmicity persists through the Polar night and midnight sun in Svalbard reindeer |
title_sort |
circadian rhythmicity persists through the polar night and midnight sun in svalbard reindeer |
publishDate |
2018 |
url |
http://hdl.handle.net/11250/2572989 https://doi.org/10.1038/s41598-018-32778-4 |
op_coverage |
Svalbard |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic polar night Svalbard svalbard reindeer midnight sun |
genre_facet |
Arctic polar night Svalbard svalbard reindeer midnight sun |
op_source |
8 Scientific Reports |
op_relation |
Norges forskningsråd: 223257 Egen institusjon: Norwegian institute for nature research (NINA) urn:issn:2045-2322 http://hdl.handle.net/11250/2572989 https://doi.org/10.1038/s41598-018-32778-4 cristin:1615316 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © The Author(s) 2018 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-018-32778-4 |
container_title |
Scientific Reports |
container_volume |
8 |
container_issue |
1 |
_version_ |
1766329924852908032 |