Determinants of heart rate in Svalbard reindeer reveal mechanisms of seasonal energy management
Seasonal energetic challenges may constrain an animal's ability to respond to changing individual and environmental conditions. Here, we investigated variation in heart rate, a well-established proxy for metabolic rate, in Svalbard reindeer ( Rangifer tarandus platyrhynchus ), a species with st...
Published in: | Philosophical Transactions of the Royal Society B: Biological Sciences |
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crroyalsociety:10.1098/rstb.2020.0215 2024-06-23T07:56:22+00:00 Determinants of heart rate in Svalbard reindeer reveal mechanisms of seasonal energy management Trondrud, L. Monica Pigeon, Gabriel Albon, Steve Arnold, Walter Evans, Alina L. Irvine, R. Justin Król, Elżbieta Ropstad, Erik Stien, Audun Veiberg, Vebjørn Speakman, John R. Loe, Leif Egil Norges Miljø- og Biovitenskapelige Universitet Norges Forskningsråd 2021 http://dx.doi.org/10.1098/rstb.2020.0215 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.2020.0215 https://royalsocietypublishing.org/doi/full-xml/10.1098/rstb.2020.0215 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Philosophical Transactions of the Royal Society B: Biological Sciences volume 376, issue 1831, page 20200215 ISSN 0962-8436 1471-2970 journal-article 2021 crroyalsociety https://doi.org/10.1098/rstb.2020.0215 2024-06-10T04:15:13Z Seasonal energetic challenges may constrain an animal's ability to respond to changing individual and environmental conditions. Here, we investigated variation in heart rate, a well-established proxy for metabolic rate, in Svalbard reindeer ( Rangifer tarandus platyrhynchus ), a species with strong seasonal changes in foraging and metabolic activity. In 19 adult females, we recorded heart rate, subcutaneous temperature and activity using biologgers. Mean heart rate more than doubled from winter to summer. Typical drivers of energy expenditure, such as reproduction and activity, explained a relatively limited amount of variation (2–6% in winter and 16–24% in summer) compared to seasonality, which explained 75% of annual variation in heart rate. The relationship between heart rate and subcutaneous temperature depended on individual state via body mass, age and reproductive status, and the results suggested that peripheral heterothermy is an important pathway of energy management in both winter and summer. While the seasonal plasticity in energetics makes Svalbard reindeer well-adapted to their highly seasonal environment, intraseasonal constraints on modulation of their heart rate may limit their ability to respond to severe environmental change. This study emphasizes the importance of encompassing individual state and seasonal context when studying energetics in free-living animals. This article is part of the theme issue ‘Measuring physiology in free-living animals (Part II)’. Article in Journal/Newspaper Rangifer tarandus Rangifer tarandus platyrhynchus Svalbard svalbard reindeer The Royal Society Svalbard Philosophical Transactions of the Royal Society B: Biological Sciences 376 1831 20200215 |
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Open Polar |
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The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
Seasonal energetic challenges may constrain an animal's ability to respond to changing individual and environmental conditions. Here, we investigated variation in heart rate, a well-established proxy for metabolic rate, in Svalbard reindeer ( Rangifer tarandus platyrhynchus ), a species with strong seasonal changes in foraging and metabolic activity. In 19 adult females, we recorded heart rate, subcutaneous temperature and activity using biologgers. Mean heart rate more than doubled from winter to summer. Typical drivers of energy expenditure, such as reproduction and activity, explained a relatively limited amount of variation (2–6% in winter and 16–24% in summer) compared to seasonality, which explained 75% of annual variation in heart rate. The relationship between heart rate and subcutaneous temperature depended on individual state via body mass, age and reproductive status, and the results suggested that peripheral heterothermy is an important pathway of energy management in both winter and summer. While the seasonal plasticity in energetics makes Svalbard reindeer well-adapted to their highly seasonal environment, intraseasonal constraints on modulation of their heart rate may limit their ability to respond to severe environmental change. This study emphasizes the importance of encompassing individual state and seasonal context when studying energetics in free-living animals. This article is part of the theme issue ‘Measuring physiology in free-living animals (Part II)’. |
author2 |
Norges Miljø- og Biovitenskapelige Universitet Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Trondrud, L. Monica Pigeon, Gabriel Albon, Steve Arnold, Walter Evans, Alina L. Irvine, R. Justin Król, Elżbieta Ropstad, Erik Stien, Audun Veiberg, Vebjørn Speakman, John R. Loe, Leif Egil |
spellingShingle |
Trondrud, L. Monica Pigeon, Gabriel Albon, Steve Arnold, Walter Evans, Alina L. Irvine, R. Justin Król, Elżbieta Ropstad, Erik Stien, Audun Veiberg, Vebjørn Speakman, John R. Loe, Leif Egil Determinants of heart rate in Svalbard reindeer reveal mechanisms of seasonal energy management |
author_facet |
Trondrud, L. Monica Pigeon, Gabriel Albon, Steve Arnold, Walter Evans, Alina L. Irvine, R. Justin Król, Elżbieta Ropstad, Erik Stien, Audun Veiberg, Vebjørn Speakman, John R. Loe, Leif Egil |
author_sort |
Trondrud, L. Monica |
title |
Determinants of heart rate in Svalbard reindeer reveal mechanisms of seasonal energy management |
title_short |
Determinants of heart rate in Svalbard reindeer reveal mechanisms of seasonal energy management |
title_full |
Determinants of heart rate in Svalbard reindeer reveal mechanisms of seasonal energy management |
title_fullStr |
Determinants of heart rate in Svalbard reindeer reveal mechanisms of seasonal energy management |
title_full_unstemmed |
Determinants of heart rate in Svalbard reindeer reveal mechanisms of seasonal energy management |
title_sort |
determinants of heart rate in svalbard reindeer reveal mechanisms of seasonal energy management |
publisher |
The Royal Society |
publishDate |
2021 |
url |
http://dx.doi.org/10.1098/rstb.2020.0215 https://royalsocietypublishing.org/doi/pdf/10.1098/rstb.2020.0215 https://royalsocietypublishing.org/doi/full-xml/10.1098/rstb.2020.0215 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Rangifer tarandus Rangifer tarandus platyrhynchus Svalbard svalbard reindeer |
genre_facet |
Rangifer tarandus Rangifer tarandus platyrhynchus Svalbard svalbard reindeer |
op_source |
Philosophical Transactions of the Royal Society B: Biological Sciences volume 376, issue 1831, page 20200215 ISSN 0962-8436 1471-2970 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rstb.2020.0215 |
container_title |
Philosophical Transactions of the Royal Society B: Biological Sciences |
container_volume |
376 |
container_issue |
1831 |
container_start_page |
20200215 |
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1802649410185723904 |