Apparent changes in body insulation of juvenile king penguins suggest an energetic challenge during their early life at sea
International audience Little is known about the early life at sea of marine top predators, like deep-diving king penguins (Aptenodytes patagonicus), although this dispersal phase is probably a critical phase in their life. Apart from finding favourable foraging sites, they have to develop effective...
Published in: | Journal of Experimental Biology |
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Online Access: | https://hal.archives-ouvertes.fr/hal-01572007 https://doi.org/10.1242/jeb.160143 |
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ftccsdartic:oai:HAL:hal-01572007v1 2023-05-15T17:03:50+02:00 Apparent changes in body insulation of juvenile king penguins suggest an energetic challenge during their early life at sea Enstipp, Manfred R Bost, Charles-André Le Bohec, Céline Bost, Caroline Le Maho, Yvon Weimerskirch, Henri Handrich, Yves Département Ecologie, Physiologie et Ethologie (DEPE-IPHC) Institut Pluridisciplinaire Hubert Curien (IPHC) Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Centre Scientifique de Monaco (CSM) 2017 https://hal.archives-ouvertes.fr/hal-01572007 https://doi.org/10.1242/jeb.160143 en eng HAL CCSD The Company of Biologists info:eu-repo/semantics/altIdentifier/doi/10.1242/jeb.160143 hal-01572007 https://hal.archives-ouvertes.fr/hal-01572007 doi:10.1242/jeb.160143 ISSN: 0022-0949 EISSN: 1477-9145 Journal of Experimental Biology https://hal.archives-ouvertes.fr/hal-01572007 Journal of Experimental Biology, The Company of Biologists, 2017, 220, pp.2666-2678. ⟨10.1242/jeb.160143⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2017 ftccsdartic https://doi.org/10.1242/jeb.160143 2021-12-05T02:49:04Z International audience Little is known about the early life at sea of marine top predators, like deep-diving king penguins (Aptenodytes patagonicus), although this dispersal phase is probably a critical phase in their life. Apart from finding favourable foraging sites, they have to develop effective prey search patterns as well as physiological capacities that enable them to capture sufficient prey to meet their energetic needs. To investigate the ontogeny of their thermoregulatory responses at sea, we implanted 30 juvenile king penguins and 8 adult breeders with a small data logger that recorded pressure and subcutaneous temperature continuously for up to 2.5 years. We found important changes in the development of peripheral temperature patterns of foraging juvenile king penguins throughout their first year at sea. Peripheral temperature during foraging bouts fell to increasingly lower levels during the first 6 months at sea, after which it stabilized. Most importantly, these changes re-occurred during their second year at sea, after birds had fasted for ∼4 weeks on land during their second moult. Furthermore, similar peripheral temperature patterns were also present in adult birds during foraging trips throughout their breeding cycle. We suggest that rather than being a simple consequence of concurrent changes in dive effort or an indication of a physiological maturation process, these seasonal temperature changes mainly reflect differences in thermal insulation. Heat loss estimates for juveniles at sea were initially high but declined to approximately half after ∼6 months at sea, suggesting that juvenile king penguins face a strong energetic challenge during their early oceanic existence. Article in Journal/Newspaper King Penguins Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Journal of Experimental Biology 220 14 2666 2678 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Enstipp, Manfred R Bost, Charles-André Le Bohec, Céline Bost, Caroline Le Maho, Yvon Weimerskirch, Henri Handrich, Yves Apparent changes in body insulation of juvenile king penguins suggest an energetic challenge during their early life at sea |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Little is known about the early life at sea of marine top predators, like deep-diving king penguins (Aptenodytes patagonicus), although this dispersal phase is probably a critical phase in their life. Apart from finding favourable foraging sites, they have to develop effective prey search patterns as well as physiological capacities that enable them to capture sufficient prey to meet their energetic needs. To investigate the ontogeny of their thermoregulatory responses at sea, we implanted 30 juvenile king penguins and 8 adult breeders with a small data logger that recorded pressure and subcutaneous temperature continuously for up to 2.5 years. We found important changes in the development of peripheral temperature patterns of foraging juvenile king penguins throughout their first year at sea. Peripheral temperature during foraging bouts fell to increasingly lower levels during the first 6 months at sea, after which it stabilized. Most importantly, these changes re-occurred during their second year at sea, after birds had fasted for ∼4 weeks on land during their second moult. Furthermore, similar peripheral temperature patterns were also present in adult birds during foraging trips throughout their breeding cycle. We suggest that rather than being a simple consequence of concurrent changes in dive effort or an indication of a physiological maturation process, these seasonal temperature changes mainly reflect differences in thermal insulation. Heat loss estimates for juveniles at sea were initially high but declined to approximately half after ∼6 months at sea, suggesting that juvenile king penguins face a strong energetic challenge during their early oceanic existence. |
author2 |
Département Ecologie, Physiologie et Ethologie (DEPE-IPHC) Institut Pluridisciplinaire Hubert Curien (IPHC) Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Centre Scientifique de Monaco (CSM) |
format |
Article in Journal/Newspaper |
author |
Enstipp, Manfred R Bost, Charles-André Le Bohec, Céline Bost, Caroline Le Maho, Yvon Weimerskirch, Henri Handrich, Yves |
author_facet |
Enstipp, Manfred R Bost, Charles-André Le Bohec, Céline Bost, Caroline Le Maho, Yvon Weimerskirch, Henri Handrich, Yves |
author_sort |
Enstipp, Manfred R |
title |
Apparent changes in body insulation of juvenile king penguins suggest an energetic challenge during their early life at sea |
title_short |
Apparent changes in body insulation of juvenile king penguins suggest an energetic challenge during their early life at sea |
title_full |
Apparent changes in body insulation of juvenile king penguins suggest an energetic challenge during their early life at sea |
title_fullStr |
Apparent changes in body insulation of juvenile king penguins suggest an energetic challenge during their early life at sea |
title_full_unstemmed |
Apparent changes in body insulation of juvenile king penguins suggest an energetic challenge during their early life at sea |
title_sort |
apparent changes in body insulation of juvenile king penguins suggest an energetic challenge during their early life at sea |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.archives-ouvertes.fr/hal-01572007 https://doi.org/10.1242/jeb.160143 |
genre |
King Penguins |
genre_facet |
King Penguins |
op_source |
ISSN: 0022-0949 EISSN: 1477-9145 Journal of Experimental Biology https://hal.archives-ouvertes.fr/hal-01572007 Journal of Experimental Biology, The Company of Biologists, 2017, 220, pp.2666-2678. ⟨10.1242/jeb.160143⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1242/jeb.160143 hal-01572007 https://hal.archives-ouvertes.fr/hal-01572007 doi:10.1242/jeb.160143 |
op_doi |
https://doi.org/10.1242/jeb.160143 |
container_title |
Journal of Experimental Biology |
container_volume |
220 |
container_issue |
14 |
container_start_page |
2666 |
op_container_end_page |
2678 |
_version_ |
1766057775134146560 |