Body surface rewarming in fully and partially hypothermic king penguins
Penguins face a major thermal transition when returning to land in a hypothermic state after a foraging trip. Uninsulated appendages (flippers and feet) could provide flexible heat exchange during subsequent rewarming. Here, we tested the hypothesis that peripheral vasodilation could be delayed duri...
Published in: | Journal of Comparative Physiology B |
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ftuglasgow:oai:eprints.gla.ac.uk:221423 2023-05-15T17:03:54+02:00 Body surface rewarming in fully and partially hypothermic king penguins Lewden, Agnès Nord, Andreas Bonnet, Batshéva Chauvet, Florent Ancel, André McCafferty, Dominic J. 2020-09 text https://eprints.gla.ac.uk/221423/ https://eprints.gla.ac.uk/221423/1/221423.pdf en eng Springer https://eprints.gla.ac.uk/221423/1/221423.pdf Lewden, A., Nord, A. <http://eprints.gla.ac.uk/view/author/30801.html>, Bonnet, B., Chauvet, F., Ancel, A. and McCafferty, D. J. <http://eprints.gla.ac.uk/view/author/3989.html> (2020) Body surface rewarming in fully and partially hypothermic king penguins. Journal of Comparative Physiology B: Biochemical, Systems, and Environmental Physiology <https://eprints.gla.ac.uk/view/journal_volume/Journal_of_Comparative_Physiology_B=3A_Biochemical,_Systems,_and_Environmental_Physiology.html>, 190, pp. 597-609. (doi:10.1007/s00360-020-01294-1 <https://doi.org/10.1007/s00360-020-01294-1>) (PMID:32656594) (PMCID:PMC7441059) cc_by_4 CC-BY Articles PeerReviewed 2020 ftuglasgow https://doi.org/10.1007/s00360-020-01294-1 2022-09-22T22:16:06Z Penguins face a major thermal transition when returning to land in a hypothermic state after a foraging trip. Uninsulated appendages (flippers and feet) could provide flexible heat exchange during subsequent rewarming. Here, we tested the hypothesis that peripheral vasodilation could be delayed during this recovery stage. To this end, we designed an experiment to examine patterns of surface rewarming in fully hypothermic (the cloaca and peripheral regions (here; flippers, feet and the breast) < 37 °C) and partially hypothermic (cloaca at normothermia ≥ 37 °C, but periphery at hypothermia) king penguins (Aptenodytes patagonicus) when they rewarmed in the laboratory. Both groups rewarmed during the 21 min observation period, but the temperature changes were larger in fully than in partially hypothermic birds. Moreover, we observed a 5 min delay of peripheral temperature in fully compared to partially hypothermic birds, suggesting that this process was impacted by low internal temperature. To investigate whether our laboratory data were applicable to field conditions, we also recorded surface temperatures of free-ranging penguins after they came ashore to the colony. Initial surface temperatures were lower in these birds compared to in those that rewarmed in the laboratory, and changed less over a comparable period of time on land. This could be explained both by environmental conditions and possible handling-induced thermogenesis in the laboratory. Nevertheless, this study demonstrated that appendage vasodilation is flexibly used during rewarming and that recovery may be influenced by both internal temperature and environmental conditions when penguins transition from sea to land. Article in Journal/Newspaper King Penguins University of Glasgow: Enlighten - Publications Journal of Comparative Physiology B 190 5 597 609 |
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Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
English |
description |
Penguins face a major thermal transition when returning to land in a hypothermic state after a foraging trip. Uninsulated appendages (flippers and feet) could provide flexible heat exchange during subsequent rewarming. Here, we tested the hypothesis that peripheral vasodilation could be delayed during this recovery stage. To this end, we designed an experiment to examine patterns of surface rewarming in fully hypothermic (the cloaca and peripheral regions (here; flippers, feet and the breast) < 37 °C) and partially hypothermic (cloaca at normothermia ≥ 37 °C, but periphery at hypothermia) king penguins (Aptenodytes patagonicus) when they rewarmed in the laboratory. Both groups rewarmed during the 21 min observation period, but the temperature changes were larger in fully than in partially hypothermic birds. Moreover, we observed a 5 min delay of peripheral temperature in fully compared to partially hypothermic birds, suggesting that this process was impacted by low internal temperature. To investigate whether our laboratory data were applicable to field conditions, we also recorded surface temperatures of free-ranging penguins after they came ashore to the colony. Initial surface temperatures were lower in these birds compared to in those that rewarmed in the laboratory, and changed less over a comparable period of time on land. This could be explained both by environmental conditions and possible handling-induced thermogenesis in the laboratory. Nevertheless, this study demonstrated that appendage vasodilation is flexibly used during rewarming and that recovery may be influenced by both internal temperature and environmental conditions when penguins transition from sea to land. |
format |
Article in Journal/Newspaper |
author |
Lewden, Agnès Nord, Andreas Bonnet, Batshéva Chauvet, Florent Ancel, André McCafferty, Dominic J. |
spellingShingle |
Lewden, Agnès Nord, Andreas Bonnet, Batshéva Chauvet, Florent Ancel, André McCafferty, Dominic J. Body surface rewarming in fully and partially hypothermic king penguins |
author_facet |
Lewden, Agnès Nord, Andreas Bonnet, Batshéva Chauvet, Florent Ancel, André McCafferty, Dominic J. |
author_sort |
Lewden, Agnès |
title |
Body surface rewarming in fully and partially hypothermic king penguins |
title_short |
Body surface rewarming in fully and partially hypothermic king penguins |
title_full |
Body surface rewarming in fully and partially hypothermic king penguins |
title_fullStr |
Body surface rewarming in fully and partially hypothermic king penguins |
title_full_unstemmed |
Body surface rewarming in fully and partially hypothermic king penguins |
title_sort |
body surface rewarming in fully and partially hypothermic king penguins |
publisher |
Springer |
publishDate |
2020 |
url |
https://eprints.gla.ac.uk/221423/ https://eprints.gla.ac.uk/221423/1/221423.pdf |
genre |
King Penguins |
genre_facet |
King Penguins |
op_relation |
https://eprints.gla.ac.uk/221423/1/221423.pdf Lewden, A., Nord, A. <http://eprints.gla.ac.uk/view/author/30801.html>, Bonnet, B., Chauvet, F., Ancel, A. and McCafferty, D. J. <http://eprints.gla.ac.uk/view/author/3989.html> (2020) Body surface rewarming in fully and partially hypothermic king penguins. Journal of Comparative Physiology B: Biochemical, Systems, and Environmental Physiology <https://eprints.gla.ac.uk/view/journal_volume/Journal_of_Comparative_Physiology_B=3A_Biochemical,_Systems,_and_Environmental_Physiology.html>, 190, pp. 597-609. (doi:10.1007/s00360-020-01294-1 <https://doi.org/10.1007/s00360-020-01294-1>) (PMID:32656594) (PMCID:PMC7441059) |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00360-020-01294-1 |
container_title |
Journal of Comparative Physiology B |
container_volume |
190 |
container_issue |
5 |
container_start_page |
597 |
op_container_end_page |
609 |
_version_ |
1766057892624990208 |