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Body Temperature an...
Body Temperature and Activity Rhythms Under Different Photoperiods in High Arctic Svalbard ptarmigan (Lagopus muta hyperborea)
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- Appenroth, Daniel (författare)
- UiT The Arctic University of Norway, Tromsø
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- Nord, Andreas (författare)
- Lund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Ekologisk och evolutionär fysiologi,Forskargrupper vid Lunds universitet,CAnMove - Centrum för forskning om djurs spridning och flyttning,Evolutionary ecology,Department of Biology,Faculty of Science,Ecological and Evolutionary Physiology,Lund University Research Groups,CAnMove - Centre for Animal Movement Research,UiT The Arctic University of Norway, Tromsø
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- Hazlerigg, David G. (författare)
- UiT The Arctic University of Norway, Tromsø
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- Wagner, Gabriela C. (författare)
- UiT The Arctic University of Norway, Tromsø,Norwegian Institute of Bioeconomy Research (Nibio)
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(creator_code:org_t)
- 2021-03-08
- 2021
- Engelska.
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Ingår i: Frontiers in Physiology. - : Frontiers Media SA. - 1664-042X. ; 12
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://www.frontier...
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https://lup.lub.lu.s...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- 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 (Tb) alongside locomotor activity in captive birds under different photoperiods. We show that Tb 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 Tb attenuates and activity shows signs of ultradian rhythmicity. Birds under SP also showed a rise in Tb 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.
Ämnesord
- NATURVETENSKAP -- Biologi -- Zoologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Zoology (hsv//eng)
Nyckelord
- Arctic
- chronobiology
- circadian rhythm
- heterothermy
- photoperiod
- Svalbard ptarmigan
- thermoregulation
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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