Data from: When the sun never sets: diverse activity rhythms under continuous daylight in free-living arctic-breeding birds
Circadian clocks are centrally involved in the regulation of daily behavioural and physiological processes. These clocks are synchronized to the 24 h day by external cues (Zeitgeber), the most important of which is the light–dark cycle. In polar environments, however, the strength of the Zeitgeber i...
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ftdryad:oai:v1.datadryad.org:10255/dryad.49532 2023-05-15T14:26:15+02:00 Data from: When the sun never sets: diverse activity rhythms under continuous daylight in free-living arctic-breeding birds Steiger, Silke S. Valcu, Mihai Spoelstra, Kamiel Helm, Barbara Wikelski, Martin Kempenaers, Bart Barrow Alaska 71°32’N 156°65’W 2013-07-01T17:50:30Z http://hdl.handle.net/10255/dryad.49532 https://doi.org/10.5061/dryad.4g1g0 unknown doi:10.5061/dryad.4g1g0/1 doi:10.1098/rspb.2013.1016 PMID:23782884 doi:10.5061/dryad.4g1g0 Steiger SS, Valcu M, Spoelstra K, Helm B, Wikelski M, Kempenaers B (2013) When the sun never sets: diverse activity rhythms under continuous daylight in free-living arctic-breeding birds. Proceedings of the Royal Society B 280(1764): 20131016. http://hdl.handle.net/10255/dryad.49532 circadian clock continuous daylight mating system activity Arctic Article 2013 ftdryad https://doi.org/10.5061/dryad.4g1g0 https://doi.org/10.5061/dryad.4g1g0/1 https://doi.org/10.1098/rspb.2013.1016 2020-01-01T15:01:34Z Circadian clocks are centrally involved in the regulation of daily behavioural and physiological processes. These clocks are synchronized to the 24 h day by external cues (Zeitgeber), the most important of which is the light–dark cycle. In polar environments, however, the strength of the Zeitgeber is greatly reduced around the summer and winter solstices (continuous daylight or continuous darkness). How animals time their behaviour under such conditions has rarely been studied in the wild. Using a radio-telemetry-based system, we investigated daily activity rhythms under continuous daylight in Barrow, Alaska, throughout the breeding season in four bird species that differ in mating system and parental behaviour. We found substantial diversity in daily activity rhythms depending on species, sex and breeding stage. Individuals exhibited either robust, entrained 24 h activity cycles, were continuously active (arrhythmic) or showed ‘free-running’ activity cycles. In semipalmated sandpipers, a shorebird with biparental incubation, we show that the free-running rhythm is synchronized between pair mates. The diversity of diel time-keeping under continuous daylight emphasizes the plasticity of the circadian system, and the importance of the social and life-history context. Our results support the idea that circadian behaviour can be adaptively modified to enable species-specific time-keeping under polar conditions. Article in Journal/Newspaper Arctic Arctic Barrow Alaska Dryad Digital Repository (Duke University) Arctic |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
circadian clock continuous daylight mating system activity Arctic |
spellingShingle |
circadian clock continuous daylight mating system activity Arctic Steiger, Silke S. Valcu, Mihai Spoelstra, Kamiel Helm, Barbara Wikelski, Martin Kempenaers, Bart Data from: When the sun never sets: diverse activity rhythms under continuous daylight in free-living arctic-breeding birds |
topic_facet |
circadian clock continuous daylight mating system activity Arctic |
description |
Circadian clocks are centrally involved in the regulation of daily behavioural and physiological processes. These clocks are synchronized to the 24 h day by external cues (Zeitgeber), the most important of which is the light–dark cycle. In polar environments, however, the strength of the Zeitgeber is greatly reduced around the summer and winter solstices (continuous daylight or continuous darkness). How animals time their behaviour under such conditions has rarely been studied in the wild. Using a radio-telemetry-based system, we investigated daily activity rhythms under continuous daylight in Barrow, Alaska, throughout the breeding season in four bird species that differ in mating system and parental behaviour. We found substantial diversity in daily activity rhythms depending on species, sex and breeding stage. Individuals exhibited either robust, entrained 24 h activity cycles, were continuously active (arrhythmic) or showed ‘free-running’ activity cycles. In semipalmated sandpipers, a shorebird with biparental incubation, we show that the free-running rhythm is synchronized between pair mates. The diversity of diel time-keeping under continuous daylight emphasizes the plasticity of the circadian system, and the importance of the social and life-history context. Our results support the idea that circadian behaviour can be adaptively modified to enable species-specific time-keeping under polar conditions. |
format |
Article in Journal/Newspaper |
author |
Steiger, Silke S. Valcu, Mihai Spoelstra, Kamiel Helm, Barbara Wikelski, Martin Kempenaers, Bart |
author_facet |
Steiger, Silke S. Valcu, Mihai Spoelstra, Kamiel Helm, Barbara Wikelski, Martin Kempenaers, Bart |
author_sort |
Steiger, Silke S. |
title |
Data from: When the sun never sets: diverse activity rhythms under continuous daylight in free-living arctic-breeding birds |
title_short |
Data from: When the sun never sets: diverse activity rhythms under continuous daylight in free-living arctic-breeding birds |
title_full |
Data from: When the sun never sets: diverse activity rhythms under continuous daylight in free-living arctic-breeding birds |
title_fullStr |
Data from: When the sun never sets: diverse activity rhythms under continuous daylight in free-living arctic-breeding birds |
title_full_unstemmed |
Data from: When the sun never sets: diverse activity rhythms under continuous daylight in free-living arctic-breeding birds |
title_sort |
data from: when the sun never sets: diverse activity rhythms under continuous daylight in free-living arctic-breeding birds |
publishDate |
2013 |
url |
http://hdl.handle.net/10255/dryad.49532 https://doi.org/10.5061/dryad.4g1g0 |
op_coverage |
Barrow Alaska 71°32’N 156°65’W |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Barrow Alaska |
genre_facet |
Arctic Arctic Barrow Alaska |
op_relation |
doi:10.5061/dryad.4g1g0/1 doi:10.1098/rspb.2013.1016 PMID:23782884 doi:10.5061/dryad.4g1g0 Steiger SS, Valcu M, Spoelstra K, Helm B, Wikelski M, Kempenaers B (2013) When the sun never sets: diverse activity rhythms under continuous daylight in free-living arctic-breeding birds. Proceedings of the Royal Society B 280(1764): 20131016. http://hdl.handle.net/10255/dryad.49532 |
op_doi |
https://doi.org/10.5061/dryad.4g1g0 https://doi.org/10.5061/dryad.4g1g0/1 https://doi.org/10.1098/rspb.2013.1016 |
_version_ |
1766298726008094720 |