Changes in body surface temperature reveal the thermal challenge associated with catastrophic moult in captive gentoo penguins
International audience Once a year, penguins undergo a catastrophic moult, replacing their entire plumage during a fasting period on land or on sea-ice during which time individuals can lose 45% of their body mass. In penguins, new feather synthesis precedes the loss of old feathers, leading to an a...
Published in: | Journal of Experimental Biology |
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Online Access: | https://hal.univ-brest.fr/hal-04628012 https://hal.univ-brest.fr/hal-04628012/document https://hal.univ-brest.fr/hal-04628012/file/jeb247332.pdf https://doi.org/10.1242/jeb.247332 |
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fthalin2p3:oai:HAL:hal-04628012v1 2024-09-15T18:31:41+00:00 Changes in body surface temperature reveal the thermal challenge associated with catastrophic moult in captive gentoo penguins Lewden, Agnès Halna Du Fretay, Tristan Stier, Antoine Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut Pluridisciplinaire Hubert Curien (IPHC) Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) University of Turku ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) 2024-06-12 https://hal.univ-brest.fr/hal-04628012 https://hal.univ-brest.fr/hal-04628012/document https://hal.univ-brest.fr/hal-04628012/file/jeb247332.pdf https://doi.org/10.1242/jeb.247332 en eng HAL CCSD The Company of Biologists info:eu-repo/semantics/altIdentifier/doi/10.1242/jeb.247332 hal-04628012 https://hal.univ-brest.fr/hal-04628012 https://hal.univ-brest.fr/hal-04628012/document https://hal.univ-brest.fr/hal-04628012/file/jeb247332.pdf doi:10.1242/jeb.247332 info:eu-repo/semantics/OpenAccess ISSN: 0022-0949 EISSN: 1477-9145 Journal of Experimental Biology https://hal.univ-brest.fr/hal-04628012 Journal of Experimental Biology, 2024, 227 (11), ⟨10.1242/jeb.247332⟩ [SDV]Life Sciences [q-bio] info:eu-repo/semantics/article Journal articles 2024 fthalin2p3 https://doi.org/10.1242/jeb.247332 2024-07-03T03:33:02Z International audience Once a year, penguins undergo a catastrophic moult, replacing their entire plumage during a fasting period on land or on sea-ice during which time individuals can lose 45% of their body mass. In penguins, new feather synthesis precedes the loss of old feathers, leading to an accumulation of two feather layers (double coat) before the old plumage is shed. We hypothesized that the combination of the high metabolism required for new feather synthesis and the potentially high thermal insulation linked to the double coat could lead to a thermal challenge requiring additional peripheral circulation to thermal windows to dissipate the extra heat. To test this hypothesis, we measured the surface temperature of different body regions of captive gentoo penguins (Pygoscelis papua) throughout the moult under constant environmental conditions. The surface temperature of the main body trunk decreased during the initial stages of the moult, suggesting greater thermal insulation. In contrast, the periorbital region, a potential proxy of core temperature in birds, increased during these same early moulting stages. The surface temperature of the bill, flipper and foot (thermal windows) tended to initially increase during the moult, highlighting the likely need for extra heat dissipation in moulting penguins. These results raise questions regarding the thermoregulatory capacities of penguins in the wild during the challenging period of moulting on land in the current context of global warming. Article in Journal/Newspaper Pygoscelis papua Sea ice HAL-IN2P3 (Institut national de physique nucléaire et de physique des particules) Journal of Experimental Biology 227 11 |
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Open Polar |
collection |
HAL-IN2P3 (Institut national de physique nucléaire et de physique des particules) |
op_collection_id |
fthalin2p3 |
language |
English |
topic |
[SDV]Life Sciences [q-bio] |
spellingShingle |
[SDV]Life Sciences [q-bio] Lewden, Agnès Halna Du Fretay, Tristan Stier, Antoine Changes in body surface temperature reveal the thermal challenge associated with catastrophic moult in captive gentoo penguins |
topic_facet |
[SDV]Life Sciences [q-bio] |
description |
International audience Once a year, penguins undergo a catastrophic moult, replacing their entire plumage during a fasting period on land or on sea-ice during which time individuals can lose 45% of their body mass. In penguins, new feather synthesis precedes the loss of old feathers, leading to an accumulation of two feather layers (double coat) before the old plumage is shed. We hypothesized that the combination of the high metabolism required for new feather synthesis and the potentially high thermal insulation linked to the double coat could lead to a thermal challenge requiring additional peripheral circulation to thermal windows to dissipate the extra heat. To test this hypothesis, we measured the surface temperature of different body regions of captive gentoo penguins (Pygoscelis papua) throughout the moult under constant environmental conditions. The surface temperature of the main body trunk decreased during the initial stages of the moult, suggesting greater thermal insulation. In contrast, the periorbital region, a potential proxy of core temperature in birds, increased during these same early moulting stages. The surface temperature of the bill, flipper and foot (thermal windows) tended to initially increase during the moult, highlighting the likely need for extra heat dissipation in moulting penguins. These results raise questions regarding the thermoregulatory capacities of penguins in the wild during the challenging period of moulting on land in the current context of global warming. |
author2 |
Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Institut Pluridisciplinaire Hubert Curien (IPHC) Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) University of Turku ANR-17-EURE-0015,ISBlue,Interdisciplinary Graduate School for the Blue planet(2017) |
format |
Article in Journal/Newspaper |
author |
Lewden, Agnès Halna Du Fretay, Tristan Stier, Antoine |
author_facet |
Lewden, Agnès Halna Du Fretay, Tristan Stier, Antoine |
author_sort |
Lewden, Agnès |
title |
Changes in body surface temperature reveal the thermal challenge associated with catastrophic moult in captive gentoo penguins |
title_short |
Changes in body surface temperature reveal the thermal challenge associated with catastrophic moult in captive gentoo penguins |
title_full |
Changes in body surface temperature reveal the thermal challenge associated with catastrophic moult in captive gentoo penguins |
title_fullStr |
Changes in body surface temperature reveal the thermal challenge associated with catastrophic moult in captive gentoo penguins |
title_full_unstemmed |
Changes in body surface temperature reveal the thermal challenge associated with catastrophic moult in captive gentoo penguins |
title_sort |
changes in body surface temperature reveal the thermal challenge associated with catastrophic moult in captive gentoo penguins |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.univ-brest.fr/hal-04628012 https://hal.univ-brest.fr/hal-04628012/document https://hal.univ-brest.fr/hal-04628012/file/jeb247332.pdf https://doi.org/10.1242/jeb.247332 |
genre |
Pygoscelis papua Sea ice |
genre_facet |
Pygoscelis papua Sea ice |
op_source |
ISSN: 0022-0949 EISSN: 1477-9145 Journal of Experimental Biology https://hal.univ-brest.fr/hal-04628012 Journal of Experimental Biology, 2024, 227 (11), ⟨10.1242/jeb.247332⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1242/jeb.247332 hal-04628012 https://hal.univ-brest.fr/hal-04628012 https://hal.univ-brest.fr/hal-04628012/document https://hal.univ-brest.fr/hal-04628012/file/jeb247332.pdf doi:10.1242/jeb.247332 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1242/jeb.247332 |
container_title |
Journal of Experimental Biology |
container_volume |
227 |
container_issue |
11 |
_version_ |
1810473430927015936 |