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dc.contributor.authorAppenroth, Daniel
dc.contributor.authorNord, Andreas
dc.contributor.authorHazlerigg, David
dc.contributor.authorWagner, Gabriela
dc.date.accessioned2021-06-21T07:38:43Z
dc.date.available2021-06-21T07:38:43Z
dc.date.issued2021-03-08
dc.description.abstractOrganisms 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 (<i>T</i><sub>b</sub>) alongside locomotor activity in captive birds under different photoperiods. We show that <i>T</i><sub>b</sub> 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 <i>T</i><sub>b</sub> attenuates and activity shows signs of ultradian rhythmicity. Birds under SP also showed a rise in <i>T</i><sub>b</sub> 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.en_US
dc.identifier.citationAppenroth D, Nord, Hazlerigg, Wagner. Body Temperature and Activity Rhythms Under Different Photoperiods in High Arctic Svalbard ptarmigan (Lagopus muta hyperborea). Frontiers in Physiology. 2021;12en_US
dc.identifier.cristinIDFRIDAID 1908146
dc.identifier.doi10.3389/fphys.2021.633866
dc.identifier.issn1664-042X
dc.identifier.urihttps://hdl.handle.net/10037/21481
dc.language.isoengen_US
dc.publisherFrontiers Mediaen_US
dc.relation.journalFrontiers in Physiology
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2021 The Author(s)en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Økologi: 488en_US
dc.titleBody Temperature and Activity Rhythms Under Different Photoperiods in High Arctic Svalbard ptarmigan (Lagopus muta hyperborea)en_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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