The dive performance of immature king penguins following their annual molt suggests physiological constraints
International audience Like all birds, penguins undergo periodic molt, during which they replace old feathers. However, unlike other birds, penguins replace their entire plumage within a short period while fasting ashore. During molt, king penguins (Aptenodytes patagonicus) lose half of their initia...
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ftunivnantes:oai:HAL:hal-02338776v1 2023-05-15T17:03:51+02:00 The dive performance of immature king penguins following their annual molt suggests physiological constraints Enstipp, Manfred Bost, Charles-André Le Bohec, Céline Bost, Caroline Laesser, Robin Le Maho, Yvon Weimerskirch, Henri Handrich, Yves Institut Pluridisciplinaire Hubert Curien (IPHC) Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) 2019 https://hal.science/hal-02338776 https://doi.org/10.1242/jeb.208900 en eng HAL CCSD The Company of Biologists info:eu-repo/semantics/altIdentifier/doi/10.1242/jeb.208900 hal-02338776 https://hal.science/hal-02338776 doi:10.1242/jeb.208900 ISSN: 0022-0949 EISSN: 1477-9145 Journal of Experimental Biology https://hal.science/hal-02338776 Journal of Experimental Biology, 2019, 222 (20), pp.jeb208900. ⟨10.1242/jeb.208900⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2019 ftunivnantes https://doi.org/10.1242/jeb.208900 2023-03-08T05:08:43Z International audience Like all birds, penguins undergo periodic molt, during which they replace old feathers. However, unlike other birds, penguins replace their entire plumage within a short period while fasting ashore. During molt, king penguins (Aptenodytes patagonicus) lose half of their initial body mass, most importantly their insulating subcutaneous fat and half of their pectoral muscle mass. The latter might challenge their capacity to generate and sustain a sufficient mechanical power output to swim to distant food sources and propel themselves to great depth for successful prey capture. To investigate the effects of the annual molt fast on their dive/foraging performance, we studied various dive/foraging parameters and peripheral temperature patterns in immature king penguins across two molt cycles, after birds had spent their first and second year at sea, using implanted data-loggers. We found that the dive/foraging performance of immature king penguins was significantly reduced during post-molt foraging trips. Dive and bottom duration for a given depth were shorter during post-molt and post-dive surface interval duration was longer, reducing overall dive efficiency and underwater foraging time. We attribute this decline to the severe physiological changes that birds undergo during their annual molt. Peripheral temperature patterns differed greatly between pre- and post-molt trips, indicating the loss of the insulating subcutaneous fat layer during molt. Peripheral perfusion, as inferred from peripheral temperature, was restricted to short periods at night during pre-molt but occurred throughout extended periods during post-molt, reflecting the need to rapidly deposit an insulating fat layer during the latter period. Article in Journal/Newspaper King Penguins Université de Nantes: HAL-UNIV-NANTES Journal of Experimental Biology 222 20 |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Enstipp, Manfred Bost, Charles-André Le Bohec, Céline Bost, Caroline Laesser, Robin Le Maho, Yvon Weimerskirch, Henri Handrich, Yves The dive performance of immature king penguins following their annual molt suggests physiological constraints |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience Like all birds, penguins undergo periodic molt, during which they replace old feathers. However, unlike other birds, penguins replace their entire plumage within a short period while fasting ashore. During molt, king penguins (Aptenodytes patagonicus) lose half of their initial body mass, most importantly their insulating subcutaneous fat and half of their pectoral muscle mass. The latter might challenge their capacity to generate and sustain a sufficient mechanical power output to swim to distant food sources and propel themselves to great depth for successful prey capture. To investigate the effects of the annual molt fast on their dive/foraging performance, we studied various dive/foraging parameters and peripheral temperature patterns in immature king penguins across two molt cycles, after birds had spent their first and second year at sea, using implanted data-loggers. We found that the dive/foraging performance of immature king penguins was significantly reduced during post-molt foraging trips. Dive and bottom duration for a given depth were shorter during post-molt and post-dive surface interval duration was longer, reducing overall dive efficiency and underwater foraging time. We attribute this decline to the severe physiological changes that birds undergo during their annual molt. Peripheral temperature patterns differed greatly between pre- and post-molt trips, indicating the loss of the insulating subcutaneous fat layer during molt. Peripheral perfusion, as inferred from peripheral temperature, was restricted to short periods at night during pre-molt but occurred throughout extended periods during post-molt, reflecting the need to rapidly deposit an insulating fat layer during the latter period. |
author2 |
Institut Pluridisciplinaire Hubert Curien (IPHC) Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Enstipp, Manfred Bost, Charles-André Le Bohec, Céline Bost, Caroline Laesser, Robin Le Maho, Yvon Weimerskirch, Henri Handrich, Yves |
author_facet |
Enstipp, Manfred Bost, Charles-André Le Bohec, Céline Bost, Caroline Laesser, Robin Le Maho, Yvon Weimerskirch, Henri Handrich, Yves |
author_sort |
Enstipp, Manfred |
title |
The dive performance of immature king penguins following their annual molt suggests physiological constraints |
title_short |
The dive performance of immature king penguins following their annual molt suggests physiological constraints |
title_full |
The dive performance of immature king penguins following their annual molt suggests physiological constraints |
title_fullStr |
The dive performance of immature king penguins following their annual molt suggests physiological constraints |
title_full_unstemmed |
The dive performance of immature king penguins following their annual molt suggests physiological constraints |
title_sort |
dive performance of immature king penguins following their annual molt suggests physiological constraints |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02338776 https://doi.org/10.1242/jeb.208900 |
genre |
King Penguins |
genre_facet |
King Penguins |
op_source |
ISSN: 0022-0949 EISSN: 1477-9145 Journal of Experimental Biology https://hal.science/hal-02338776 Journal of Experimental Biology, 2019, 222 (20), pp.jeb208900. ⟨10.1242/jeb.208900⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1242/jeb.208900 hal-02338776 https://hal.science/hal-02338776 doi:10.1242/jeb.208900 |
op_doi |
https://doi.org/10.1242/jeb.208900 |
container_title |
Journal of Experimental Biology |
container_volume |
222 |
container_issue |
20 |
_version_ |
1766057791853690880 |