Environmental conditions alter behavioural organization and rhythmicity of a large Arctic ruminant across the annual cycle:Environmental impact on Arctic rhythms
The existence and persistence of rhythmicity in animal activity during phases of environmental change is of interest in ecology, evolution, and chronobiology. A wide diversity of biological rhythms in response to exogenous conditions and internal stimuli have been uncovered, especially for polar ver...
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2020
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Online Access: | https://pure.au.dk/portal/en/publications/907dbb04-f5ab-4d26-b01a-173d1a828f08 https://doi.org/10.1098/rsos.201614 https://pure.au.dk/ws/files/199563500/rsos.201614.pdf http://www.scopus.com/inward/record.url?scp=85096308199&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/907dbb04-f5ab-4d26-b01a-173d1a828f08 2024-02-11T09:59:17+01:00 Environmental conditions alter behavioural organization and rhythmicity of a large Arctic ruminant across the annual cycle:Environmental impact on Arctic rhythms van Beest, Floris Beumer, Larissa Teresa Chimienti, Marianna Desforges, Jean-Pierre Huffeldt, Nicholas Per Pedersen, Stine Højlund Schmidt, Niels Martin 2020-10 application/pdf https://pure.au.dk/portal/en/publications/907dbb04-f5ab-4d26-b01a-173d1a828f08 https://doi.org/10.1098/rsos.201614 https://pure.au.dk/ws/files/199563500/rsos.201614.pdf http://www.scopus.com/inward/record.url?scp=85096308199&partnerID=8YFLogxK eng eng https://pure.au.dk/portal/en/publications/907dbb04-f5ab-4d26-b01a-173d1a828f08 info:eu-repo/semantics/openAccess van Beest , F , Beumer , L T , Chimienti , M , Desforges , J-P , Huffeldt , N P , Pedersen , S H & Schmidt , N M 2020 , ' Environmental conditions alter behavioural organization and rhythmicity of a large Arctic ruminant across the annual cycle : Environmental impact on Arctic rhythms ' , Royal Society Open Science , vol. 7 , no. 10 , 201614 . https://doi.org/10.1098/rsos.201614 Arctic tundra behavioural rhythms circadian organization periodicity polar vertebrates ruminating herbivores article 2020 ftuniaarhuspubl https://doi.org/10.1098/rsos.201614 2024-01-18T00:00:27Z The existence and persistence of rhythmicity in animal activity during phases of environmental change is of interest in ecology, evolution, and chronobiology. A wide diversity of biological rhythms in response to exogenous conditions and internal stimuli have been uncovered, especially for polar vertebrates. However, empirical data supporting circadian organization of large ruminating herbivores remains inconclusive. Using year-round tracking data of the largest Arctic ruminant, the muskox (Ovibos moschatus), we modelled rhythmicity as a function of behaviour and environmental conditions. Behavioural states were classified based on patterns in hourly movements, and incorporated within a periodicity analyses framework. Although circadian rhythmicity in muskox behaviour was detected throughout the year, ultradian rhythmicity was most prevalent, especially when muskoxen were foraging and resting in mid-winter (continuous darkness). However, when combining circadian and ultradian rhythmicity together, the probability of behavioural rhythmicity declined with increasing photoperiod until largely disrupted in mid-summer (continuous light). Individuals that remained behaviourally rhythmic during mid-summer foraged in areas with lower plant productivity (NDVI) than individuals with arrhythmic behaviour. Based on our study, we conclude that muskoxen may use an interval timer to schedule their behavioural cycles when forage resources are low, but that the importance and duration of this timer are reduced once environmental conditions allow energetic reserves to be replenished ad libitum. We argue that alimentary function and metabolic requirements are critical determinants of biological rhythmicity in muskoxen, which likely applies to ruminating herbivores in general. Article in Journal/Newspaper Arctic Arctic muskox ovibos moschatus Tundra Aarhus University: Research Arctic Royal Society Open Science 7 10 201614 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Arctic tundra behavioural rhythms circadian organization periodicity polar vertebrates ruminating herbivores |
spellingShingle |
Arctic tundra behavioural rhythms circadian organization periodicity polar vertebrates ruminating herbivores van Beest, Floris Beumer, Larissa Teresa Chimienti, Marianna Desforges, Jean-Pierre Huffeldt, Nicholas Per Pedersen, Stine Højlund Schmidt, Niels Martin Environmental conditions alter behavioural organization and rhythmicity of a large Arctic ruminant across the annual cycle:Environmental impact on Arctic rhythms |
topic_facet |
Arctic tundra behavioural rhythms circadian organization periodicity polar vertebrates ruminating herbivores |
description |
The existence and persistence of rhythmicity in animal activity during phases of environmental change is of interest in ecology, evolution, and chronobiology. A wide diversity of biological rhythms in response to exogenous conditions and internal stimuli have been uncovered, especially for polar vertebrates. However, empirical data supporting circadian organization of large ruminating herbivores remains inconclusive. Using year-round tracking data of the largest Arctic ruminant, the muskox (Ovibos moschatus), we modelled rhythmicity as a function of behaviour and environmental conditions. Behavioural states were classified based on patterns in hourly movements, and incorporated within a periodicity analyses framework. Although circadian rhythmicity in muskox behaviour was detected throughout the year, ultradian rhythmicity was most prevalent, especially when muskoxen were foraging and resting in mid-winter (continuous darkness). However, when combining circadian and ultradian rhythmicity together, the probability of behavioural rhythmicity declined with increasing photoperiod until largely disrupted in mid-summer (continuous light). Individuals that remained behaviourally rhythmic during mid-summer foraged in areas with lower plant productivity (NDVI) than individuals with arrhythmic behaviour. Based on our study, we conclude that muskoxen may use an interval timer to schedule their behavioural cycles when forage resources are low, but that the importance and duration of this timer are reduced once environmental conditions allow energetic reserves to be replenished ad libitum. We argue that alimentary function and metabolic requirements are critical determinants of biological rhythmicity in muskoxen, which likely applies to ruminating herbivores in general. |
format |
Article in Journal/Newspaper |
author |
van Beest, Floris Beumer, Larissa Teresa Chimienti, Marianna Desforges, Jean-Pierre Huffeldt, Nicholas Per Pedersen, Stine Højlund Schmidt, Niels Martin |
author_facet |
van Beest, Floris Beumer, Larissa Teresa Chimienti, Marianna Desforges, Jean-Pierre Huffeldt, Nicholas Per Pedersen, Stine Højlund Schmidt, Niels Martin |
author_sort |
van Beest, Floris |
title |
Environmental conditions alter behavioural organization and rhythmicity of a large Arctic ruminant across the annual cycle:Environmental impact on Arctic rhythms |
title_short |
Environmental conditions alter behavioural organization and rhythmicity of a large Arctic ruminant across the annual cycle:Environmental impact on Arctic rhythms |
title_full |
Environmental conditions alter behavioural organization and rhythmicity of a large Arctic ruminant across the annual cycle:Environmental impact on Arctic rhythms |
title_fullStr |
Environmental conditions alter behavioural organization and rhythmicity of a large Arctic ruminant across the annual cycle:Environmental impact on Arctic rhythms |
title_full_unstemmed |
Environmental conditions alter behavioural organization and rhythmicity of a large Arctic ruminant across the annual cycle:Environmental impact on Arctic rhythms |
title_sort |
environmental conditions alter behavioural organization and rhythmicity of a large arctic ruminant across the annual cycle:environmental impact on arctic rhythms |
publishDate |
2020 |
url |
https://pure.au.dk/portal/en/publications/907dbb04-f5ab-4d26-b01a-173d1a828f08 https://doi.org/10.1098/rsos.201614 https://pure.au.dk/ws/files/199563500/rsos.201614.pdf http://www.scopus.com/inward/record.url?scp=85096308199&partnerID=8YFLogxK |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic muskox ovibos moschatus Tundra |
genre_facet |
Arctic Arctic muskox ovibos moschatus Tundra |
op_source |
van Beest , F , Beumer , L T , Chimienti , M , Desforges , J-P , Huffeldt , N P , Pedersen , S H & Schmidt , N M 2020 , ' Environmental conditions alter behavioural organization and rhythmicity of a large Arctic ruminant across the annual cycle : Environmental impact on Arctic rhythms ' , Royal Society Open Science , vol. 7 , no. 10 , 201614 . https://doi.org/10.1098/rsos.201614 |
op_relation |
https://pure.au.dk/portal/en/publications/907dbb04-f5ab-4d26-b01a-173d1a828f08 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1098/rsos.201614 |
container_title |
Royal Society Open Science |
container_volume |
7 |
container_issue |
10 |
container_start_page |
201614 |
_version_ |
1790595263253970944 |