Body Temperature and Activity Rhythms Under Different Photoperiods in High Arctic Svalbard ptarmigan (Lagopus muta hyperborea)
Organisms use circadian rhythms to anticipate and exploit daily environmental oscillations. While circadian rhythms are of clear importance for inhabitants of tropic and temperate latitudes, its role for permanent residents of the polar regions is less well understood. The high Arctic Svalbard ptarm...
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ftpubmed:oai:pubmedcentral.nih.gov:7982588 2023-05-15T14:51:42+02:00 Body Temperature and Activity Rhythms Under Different Photoperiods in High Arctic Svalbard ptarmigan (Lagopus muta hyperborea) Appenroth, Daniel Nord, Andreas Hazlerigg, David G. Wagner, Gabriela C. 2021-03-08 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7982588/ http://www.ncbi.nlm.nih.gov/pubmed/33762966 https://doi.org/10.3389/fphys.2021.633866 en eng Frontiers Media S.A. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7982588/ http://www.ncbi.nlm.nih.gov/pubmed/33762966 http://dx.doi.org/10.3389/fphys.2021.633866 Copyright © 2021 Appenroth, Nord, Hazlerigg and Wagner. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. CC-BY Front Physiol Physiology Text 2021 ftpubmed https://doi.org/10.3389/fphys.2021.633866 2021-03-28T01:41:06Z Organisms use circadian rhythms to anticipate and exploit daily environmental oscillations. While circadian rhythms are of clear importance for inhabitants of tropic and temperate latitudes, its role for permanent residents of the polar regions is less well understood. The high Arctic Svalbard ptarmigan shows behavioral rhythmicity in presence of light-dark cycles but is arrhythmic during the polar day and polar night. This has been suggested to be an adaptation to the unique light environment of the Arctic. In this study, we examined regulatory aspects of the circadian control system in the Svalbard ptarmigan by recording core body temperature (T(b)) alongside locomotor activity in captive birds under different photoperiods. We show that T(b) and activity are rhythmic with a 24-h period under short (SP; L:D 6:18) and long photoperiod (LP; L:D 16:8). Under constant light and constant darkness, rhythmicity in T(b) attenuates and activity shows signs of ultradian rhythmicity. Birds under SP also showed a rise in T(b) preceding the light-on signal and any rise in activity, which proves that the light-on signal can be anticipated, most likely by a circadian system. Text Arctic Lagopus muta Lagopus muta hyperborea polar night Svalbard PubMed Central (PMC) Arctic Svalbard Frontiers in Physiology 12 |
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English |
topic |
Physiology |
spellingShingle |
Physiology Appenroth, Daniel Nord, Andreas Hazlerigg, David G. Wagner, Gabriela C. Body Temperature and Activity Rhythms Under Different Photoperiods in High Arctic Svalbard ptarmigan (Lagopus muta hyperborea) |
topic_facet |
Physiology |
description |
Organisms use circadian rhythms to anticipate and exploit daily environmental oscillations. While circadian rhythms are of clear importance for inhabitants of tropic and temperate latitudes, its role for permanent residents of the polar regions is less well understood. The high Arctic Svalbard ptarmigan shows behavioral rhythmicity in presence of light-dark cycles but is arrhythmic during the polar day and polar night. This has been suggested to be an adaptation to the unique light environment of the Arctic. In this study, we examined regulatory aspects of the circadian control system in the Svalbard ptarmigan by recording core body temperature (T(b)) alongside locomotor activity in captive birds under different photoperiods. We show that T(b) and activity are rhythmic with a 24-h period under short (SP; L:D 6:18) and long photoperiod (LP; L:D 16:8). Under constant light and constant darkness, rhythmicity in T(b) attenuates and activity shows signs of ultradian rhythmicity. Birds under SP also showed a rise in T(b) preceding the light-on signal and any rise in activity, which proves that the light-on signal can be anticipated, most likely by a circadian system. |
format |
Text |
author |
Appenroth, Daniel Nord, Andreas Hazlerigg, David G. Wagner, Gabriela C. |
author_facet |
Appenroth, Daniel Nord, Andreas Hazlerigg, David G. Wagner, Gabriela C. |
author_sort |
Appenroth, Daniel |
title |
Body Temperature and Activity Rhythms Under Different Photoperiods in High Arctic Svalbard ptarmigan (Lagopus muta hyperborea) |
title_short |
Body Temperature and Activity Rhythms Under Different Photoperiods in High Arctic Svalbard ptarmigan (Lagopus muta hyperborea) |
title_full |
Body Temperature and Activity Rhythms Under Different Photoperiods in High Arctic Svalbard ptarmigan (Lagopus muta hyperborea) |
title_fullStr |
Body Temperature and Activity Rhythms Under Different Photoperiods in High Arctic Svalbard ptarmigan (Lagopus muta hyperborea) |
title_full_unstemmed |
Body Temperature and Activity Rhythms Under Different Photoperiods in High Arctic Svalbard ptarmigan (Lagopus muta hyperborea) |
title_sort |
body temperature and activity rhythms under different photoperiods in high arctic svalbard ptarmigan (lagopus muta hyperborea) |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7982588/ http://www.ncbi.nlm.nih.gov/pubmed/33762966 https://doi.org/10.3389/fphys.2021.633866 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Lagopus muta Lagopus muta hyperborea polar night Svalbard |
genre_facet |
Arctic Lagopus muta Lagopus muta hyperborea polar night Svalbard |
op_source |
Front Physiol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7982588/ http://www.ncbi.nlm.nih.gov/pubmed/33762966 http://dx.doi.org/10.3389/fphys.2021.633866 |
op_rights |
Copyright © 2021 Appenroth, Nord, Hazlerigg and Wagner. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fphys.2021.633866 |
container_title |
Frontiers in Physiology |
container_volume |
12 |
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1766322819684106240 |