Quantifying energetic and fitness consequences of seasonal heterothermy in an Arctic ungulate
Animals have adapted behavioral and physiological strategies to conserve energy during periods of adverse conditions. Heterothermy is one such adaptation used by endotherms. While heterothermy—fluctuations in body temperature and metabolic rate—has been shown in large vertebrates, little is known of...
Published in: | Ecology and Evolution |
---|---|
Main Authors: | , , , , , , |
Format: | Text |
Language: | English |
Published: |
John Wiley and Sons Inc.
2020
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7790657/ http://www.ncbi.nlm.nih.gov/pubmed/33437433 https://doi.org/10.1002/ece3.7049 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:7790657 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:7790657 2023-05-15T14:58:41+02:00 Quantifying energetic and fitness consequences of seasonal heterothermy in an Arctic ungulate Desforges, Jean‐Pierre van Beest, Floris M. Marques, Gonçalo M. Pedersen, Stine H. Beumer, Larissa T. Chimienti, Marianna Schmidt, Niels Martin 2020-11-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7790657/ http://www.ncbi.nlm.nih.gov/pubmed/33437433 https://doi.org/10.1002/ece3.7049 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7790657/ http://www.ncbi.nlm.nih.gov/pubmed/33437433 http://dx.doi.org/10.1002/ece3.7049 © 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Ecol Evol Original Research Text 2020 ftpubmed https://doi.org/10.1002/ece3.7049 2021-01-17T01:31:27Z Animals have adapted behavioral and physiological strategies to conserve energy during periods of adverse conditions. Heterothermy is one such adaptation used by endotherms. While heterothermy—fluctuations in body temperature and metabolic rate—has been shown in large vertebrates, little is known of the costs and benefits of this strategy, both in terms of energy and in terms of fitness. Hence, our objective was to model the energetics of seasonal heterothermy in the largest Arctic ungulate, the muskox (Ovibos moschatus), using an individual‐based energy budget model of metabolic physiology. We found that the empirically based drop in body temperature (winter max ~−0.8°C) overwinter in adult females resulted in substantial fitness benefits in terms of reduced daily energy expenditure and body mass loss. Body mass and energy reserves were 8.98% and 14.46% greater in modeled heterotherms compared to normotherms by end of winter. Based on environmental simulations, we show that seasonal heterothermy can, to some extent, buffer the negative consequences of poor prewinter body condition or reduced winter food accessibility, leading to greater winter survival (+20%–30%) and spring energy reserves (+10%–30%), and thus increased probability of future reproductive success. These results indicate substantial adaptive short‐term benefits of seasonal heterothermy at the individual level, with potential implications for long‐term population dynamics in highly seasonal environments. Text Arctic muskox ovibos moschatus PubMed Central (PMC) Arctic Ecology and Evolution 11 1 338 351 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Original Research |
spellingShingle |
Original Research Desforges, Jean‐Pierre van Beest, Floris M. Marques, Gonçalo M. Pedersen, Stine H. Beumer, Larissa T. Chimienti, Marianna Schmidt, Niels Martin Quantifying energetic and fitness consequences of seasonal heterothermy in an Arctic ungulate |
topic_facet |
Original Research |
description |
Animals have adapted behavioral and physiological strategies to conserve energy during periods of adverse conditions. Heterothermy is one such adaptation used by endotherms. While heterothermy—fluctuations in body temperature and metabolic rate—has been shown in large vertebrates, little is known of the costs and benefits of this strategy, both in terms of energy and in terms of fitness. Hence, our objective was to model the energetics of seasonal heterothermy in the largest Arctic ungulate, the muskox (Ovibos moschatus), using an individual‐based energy budget model of metabolic physiology. We found that the empirically based drop in body temperature (winter max ~−0.8°C) overwinter in adult females resulted in substantial fitness benefits in terms of reduced daily energy expenditure and body mass loss. Body mass and energy reserves were 8.98% and 14.46% greater in modeled heterotherms compared to normotherms by end of winter. Based on environmental simulations, we show that seasonal heterothermy can, to some extent, buffer the negative consequences of poor prewinter body condition or reduced winter food accessibility, leading to greater winter survival (+20%–30%) and spring energy reserves (+10%–30%), and thus increased probability of future reproductive success. These results indicate substantial adaptive short‐term benefits of seasonal heterothermy at the individual level, with potential implications for long‐term population dynamics in highly seasonal environments. |
format |
Text |
author |
Desforges, Jean‐Pierre van Beest, Floris M. Marques, Gonçalo M. Pedersen, Stine H. Beumer, Larissa T. Chimienti, Marianna Schmidt, Niels Martin |
author_facet |
Desforges, Jean‐Pierre van Beest, Floris M. Marques, Gonçalo M. Pedersen, Stine H. Beumer, Larissa T. Chimienti, Marianna Schmidt, Niels Martin |
author_sort |
Desforges, Jean‐Pierre |
title |
Quantifying energetic and fitness consequences of seasonal heterothermy in an Arctic ungulate |
title_short |
Quantifying energetic and fitness consequences of seasonal heterothermy in an Arctic ungulate |
title_full |
Quantifying energetic and fitness consequences of seasonal heterothermy in an Arctic ungulate |
title_fullStr |
Quantifying energetic and fitness consequences of seasonal heterothermy in an Arctic ungulate |
title_full_unstemmed |
Quantifying energetic and fitness consequences of seasonal heterothermy in an Arctic ungulate |
title_sort |
quantifying energetic and fitness consequences of seasonal heterothermy in an arctic ungulate |
publisher |
John Wiley and Sons Inc. |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7790657/ http://www.ncbi.nlm.nih.gov/pubmed/33437433 https://doi.org/10.1002/ece3.7049 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic muskox ovibos moschatus |
genre_facet |
Arctic muskox ovibos moschatus |
op_source |
Ecol Evol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7790657/ http://www.ncbi.nlm.nih.gov/pubmed/33437433 http://dx.doi.org/10.1002/ece3.7049 |
op_rights |
© 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ece3.7049 |
container_title |
Ecology and Evolution |
container_volume |
11 |
container_issue |
1 |
container_start_page |
338 |
op_container_end_page |
351 |
_version_ |
1766330819524165632 |