From land to ocean: one month for southern elephant seal pups to acquire aquatic skills prior to their first departure to sea
International audience Weaned southern elephant seals (SES) quickly transition from terrestrial to aquatic life after a 5- to 6-week post-weaning period. At sea, juveniles and adult elephant seals present extreme, continuous diving behaviour. Previous studies have highlighted the importance of the p...
Published in: | Physiology & Behavior |
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Online Access: | https://hal.science/hal-04521625 https://hal.science/hal-04521625/document https://hal.science/hal-04521625/file/PIOT_PB.pdf https://doi.org/10.1016/j.physbeh.2024.114525 |
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ftunivrochelle:oai:HAL:hal-04521625v1 2024-05-19T07:39:41+00:00 From land to ocean: one month for southern elephant seal pups to acquire aquatic skills prior to their first departure to sea Piot, Erwan Hippauf, Lea Charlanne, Laura Picard, Baptiste Badaut, Jérôme Gilbert, Caroline Guinet, Christophe Mécanismes Adaptatifs et Evolution (MECADEV) Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS) Centre de résonance magnétique des systèmes biologiques (CRMSB) Université de Bordeaux (UB)-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) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) École nationale vétérinaire d'Alfort (ENVA) 2024-03 https://hal.science/hal-04521625 https://hal.science/hal-04521625/document https://hal.science/hal-04521625/file/PIOT_PB.pdf https://doi.org/10.1016/j.physbeh.2024.114525 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physbeh.2024.114525 hal-04521625 https://hal.science/hal-04521625 https://hal.science/hal-04521625/document https://hal.science/hal-04521625/file/PIOT_PB.pdf doi:10.1016/j.physbeh.2024.114525 info:eu-repo/semantics/OpenAccess ISSN: 0031-9384 EISSN: 1873-507X Physiology & behavior https://hal.science/hal-04521625 Physiology & behavior, 2024, ⟨10.1016/j.physbeh.2024.114525⟩ (3-6) Mirounga leonina post-weaning fast body condition circadian rhythms activity budget electroencephalogram [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2024 ftunivrochelle https://doi.org/10.1016/j.physbeh.2024.114525 2024-04-24T00:36:21Z International audience Weaned southern elephant seals (SES) quickly transition from terrestrial to aquatic life after a 5- to 6-week post-weaning period. At sea, juveniles and adult elephant seals present extreme, continuous diving behaviour. Previous studies have highlighted the importance of the post-weaning period for weanlings to prepare for the physiological challenges of their future sea life. However, very little is known about how their body condition during this period may influence the development of their behaviour and brain activities. To characterise changes in the behavioural and brain activity of weanlings prior to ocean departure, we implemented a multi-logger approach combining measurements of movements (related to behaviour), pressure (related to diving), and brain electrical activity. As pups age, the amount of time allocated to resting decreases in favour of physical activity. Most resting (9.6 ± 1.2 h/day) takes place during daytime, with periods of slow-wave sleep representing 4.9 ± 0.9 h/day during the first 2 weeks. Furthermore, an increasing proportion of physical activity transitions from land to shore. Additionally, pups in poorer condition (lean group) are more active earlier than those in better condition (corpulent group). Finally, at weaning, clear circadian activity with two peaks at dawn and dusk is observed, and this pattern remains unchanged during the 4 weeks on land. This circadian pattern matches the one observed in adults at sea, with more prey catches at dawn and dusk, raising the question of whether it is endogenous or triggered by the mother during lactation. Article in Journal/Newspaper Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal Southern Elephant Seals HAL - Université de La Rochelle Physiology & Behavior 279 114525 |
institution |
Open Polar |
collection |
HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
(3-6) Mirounga leonina post-weaning fast body condition circadian rhythms activity budget electroencephalogram [SDE]Environmental Sciences |
spellingShingle |
(3-6) Mirounga leonina post-weaning fast body condition circadian rhythms activity budget electroencephalogram [SDE]Environmental Sciences Piot, Erwan Hippauf, Lea Charlanne, Laura Picard, Baptiste Badaut, Jérôme Gilbert, Caroline Guinet, Christophe From land to ocean: one month for southern elephant seal pups to acquire aquatic skills prior to their first departure to sea |
topic_facet |
(3-6) Mirounga leonina post-weaning fast body condition circadian rhythms activity budget electroencephalogram [SDE]Environmental Sciences |
description |
International audience Weaned southern elephant seals (SES) quickly transition from terrestrial to aquatic life after a 5- to 6-week post-weaning period. At sea, juveniles and adult elephant seals present extreme, continuous diving behaviour. Previous studies have highlighted the importance of the post-weaning period for weanlings to prepare for the physiological challenges of their future sea life. However, very little is known about how their body condition during this period may influence the development of their behaviour and brain activities. To characterise changes in the behavioural and brain activity of weanlings prior to ocean departure, we implemented a multi-logger approach combining measurements of movements (related to behaviour), pressure (related to diving), and brain electrical activity. As pups age, the amount of time allocated to resting decreases in favour of physical activity. Most resting (9.6 ± 1.2 h/day) takes place during daytime, with periods of slow-wave sleep representing 4.9 ± 0.9 h/day during the first 2 weeks. Furthermore, an increasing proportion of physical activity transitions from land to shore. Additionally, pups in poorer condition (lean group) are more active earlier than those in better condition (corpulent group). Finally, at weaning, clear circadian activity with two peaks at dawn and dusk is observed, and this pattern remains unchanged during the 4 weeks on land. This circadian pattern matches the one observed in adults at sea, with more prey catches at dawn and dusk, raising the question of whether it is endogenous or triggered by the mother during lactation. |
author2 |
Mécanismes Adaptatifs et Evolution (MECADEV) Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS) Centre de résonance magnétique des systèmes biologiques (CRMSB) Université de Bordeaux (UB)-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) Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) École nationale vétérinaire d'Alfort (ENVA) |
format |
Article in Journal/Newspaper |
author |
Piot, Erwan Hippauf, Lea Charlanne, Laura Picard, Baptiste Badaut, Jérôme Gilbert, Caroline Guinet, Christophe |
author_facet |
Piot, Erwan Hippauf, Lea Charlanne, Laura Picard, Baptiste Badaut, Jérôme Gilbert, Caroline Guinet, Christophe |
author_sort |
Piot, Erwan |
title |
From land to ocean: one month for southern elephant seal pups to acquire aquatic skills prior to their first departure to sea |
title_short |
From land to ocean: one month for southern elephant seal pups to acquire aquatic skills prior to their first departure to sea |
title_full |
From land to ocean: one month for southern elephant seal pups to acquire aquatic skills prior to their first departure to sea |
title_fullStr |
From land to ocean: one month for southern elephant seal pups to acquire aquatic skills prior to their first departure to sea |
title_full_unstemmed |
From land to ocean: one month for southern elephant seal pups to acquire aquatic skills prior to their first departure to sea |
title_sort |
from land to ocean: one month for southern elephant seal pups to acquire aquatic skills prior to their first departure to sea |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.science/hal-04521625 https://hal.science/hal-04521625/document https://hal.science/hal-04521625/file/PIOT_PB.pdf https://doi.org/10.1016/j.physbeh.2024.114525 |
genre |
Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal Southern Elephant Seals |
genre_facet |
Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal Southern Elephant Seals |
op_source |
ISSN: 0031-9384 EISSN: 1873-507X Physiology & behavior https://hal.science/hal-04521625 Physiology & behavior, 2024, ⟨10.1016/j.physbeh.2024.114525⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physbeh.2024.114525 hal-04521625 https://hal.science/hal-04521625 https://hal.science/hal-04521625/document https://hal.science/hal-04521625/file/PIOT_PB.pdf doi:10.1016/j.physbeh.2024.114525 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.physbeh.2024.114525 |
container_title |
Physiology & Behavior |
container_volume |
279 |
container_start_page |
114525 |
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1799479271206420480 |