Stable carbon and nitrogen isotope variations in canine dentine growth layers of Kerguelen southern elephant seals
International audience Foraging behaviour of mammals, namely the change in distribution and trophic levels from juvenile stage to adulthood, can be investigated by measuring δ13C and δ15N stable isotopes for layers deposited in a growing tooth. For the first time, we describe geographic differences...
Published in: | Marine Ecology Progress Series |
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Online Access: | https://hal.science/hal-00649619 https://doi.org/10.3354/meps09331 |
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ftunivnantes:oai:HAL:hal-00649619v1 2023-05-15T14:02:02+02:00 Stable carbon and nitrogen isotope variations in canine dentine growth layers of Kerguelen southern elephant seals Martin, Céline Bentaleb, Ilham Steelands, Stéphanie Guinet, Christophe Institut des Sciences de l'Evolution de Montpellier (UMR ISEM) Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement IRD : UR226-Centre National de la Recherche Scientifique (CNRS) Département de Géographie Université Laval Québec (ULaval) Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) 2011-10-20 https://hal.science/hal-00649619 https://doi.org/10.3354/meps09331 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps09331 hal-00649619 https://hal.science/hal-00649619 doi:10.3354/meps09331 ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-00649619 Marine Ecology Progress Series, 2011, 439, pp.295-305. ⟨10.3354/meps09331⟩ Mirounga leonina Dentine δ13C and δ15N Trophic level Foraging habitat [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2011 ftunivnantes https://doi.org/10.3354/meps09331 2023-02-08T00:36:27Z International audience Foraging behaviour of mammals, namely the change in distribution and trophic levels from juvenile stage to adulthood, can be investigated by measuring δ13C and δ15N stable isotopes for layers deposited in a growing tooth. For the first time, we describe geographic differences in the ontogeny of foraging strategies and in the niche partitioning process according to sex and age of a highly sexually dimorphic species: the southern elephant seal Mirounga leonina. Canines from 8 males and 6 females were analysed for δ13C and δ15N stable isotope signatures. To assess intra-individual variability, instead of analysing collagen we analysed the bulk dentine within each of the 4 growth layers deposited annually. The δ13C signature revealed that, in individuals of 1 to 4 yr of age, teeth of both males and females exhibited large intra-individual variation in δ13C, suggesting that juveniles were foraging over a broad range of marine habitats encompassing both sub-Antarctic and Antarctic waters. Four out of the 6 teeth taken from females were collected on individuals younger than 4 yr, preventing investigation of longer-term changes. A δ13C pattern emerged for males older than 4 yr: individuals became resident to either a sub- Antarctic (-17‰) or an Antarctic (-20‰, both values reported as deviations from the Vienna PeeDee Belemnite standard) foraging habitat, with a decrease in intra-individual variability. Up to the age of 4 yr, juvenile males were at a slightly higher trophic level than juvenile females, but by the age of 4 yr, while their δ13C signature revealed that they were faithful to their foraging habitat, males exhibited a significant increase in their trophic levels, as shown by their δ15N signature. Article in Journal/Newspaper Antarc* Antarctic Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal Southern Elephant Seals Université de Nantes: HAL-UNIV-NANTES Antarctic Kerguelen Marine Ecology Progress Series 439 295 305 |
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Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Mirounga leonina Dentine δ13C and δ15N Trophic level Foraging habitat [SDE]Environmental Sciences |
spellingShingle |
Mirounga leonina Dentine δ13C and δ15N Trophic level Foraging habitat [SDE]Environmental Sciences Martin, Céline Bentaleb, Ilham Steelands, Stéphanie Guinet, Christophe Stable carbon and nitrogen isotope variations in canine dentine growth layers of Kerguelen southern elephant seals |
topic_facet |
Mirounga leonina Dentine δ13C and δ15N Trophic level Foraging habitat [SDE]Environmental Sciences |
description |
International audience Foraging behaviour of mammals, namely the change in distribution and trophic levels from juvenile stage to adulthood, can be investigated by measuring δ13C and δ15N stable isotopes for layers deposited in a growing tooth. For the first time, we describe geographic differences in the ontogeny of foraging strategies and in the niche partitioning process according to sex and age of a highly sexually dimorphic species: the southern elephant seal Mirounga leonina. Canines from 8 males and 6 females were analysed for δ13C and δ15N stable isotope signatures. To assess intra-individual variability, instead of analysing collagen we analysed the bulk dentine within each of the 4 growth layers deposited annually. The δ13C signature revealed that, in individuals of 1 to 4 yr of age, teeth of both males and females exhibited large intra-individual variation in δ13C, suggesting that juveniles were foraging over a broad range of marine habitats encompassing both sub-Antarctic and Antarctic waters. Four out of the 6 teeth taken from females were collected on individuals younger than 4 yr, preventing investigation of longer-term changes. A δ13C pattern emerged for males older than 4 yr: individuals became resident to either a sub- Antarctic (-17‰) or an Antarctic (-20‰, both values reported as deviations from the Vienna PeeDee Belemnite standard) foraging habitat, with a decrease in intra-individual variability. Up to the age of 4 yr, juvenile males were at a slightly higher trophic level than juvenile females, but by the age of 4 yr, while their δ13C signature revealed that they were faithful to their foraging habitat, males exhibited a significant increase in their trophic levels, as shown by their δ15N signature. |
author2 |
Institut des Sciences de l'Evolution de Montpellier (UMR ISEM) Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-École pratique des hautes études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Institut de recherche pour le développement IRD : UR226-Centre National de la Recherche Scientifique (CNRS) Département de Géographie Université Laval Québec (ULaval) Centre d'Études Biologiques de Chizé (CEBC) Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Martin, Céline Bentaleb, Ilham Steelands, Stéphanie Guinet, Christophe |
author_facet |
Martin, Céline Bentaleb, Ilham Steelands, Stéphanie Guinet, Christophe |
author_sort |
Martin, Céline |
title |
Stable carbon and nitrogen isotope variations in canine dentine growth layers of Kerguelen southern elephant seals |
title_short |
Stable carbon and nitrogen isotope variations in canine dentine growth layers of Kerguelen southern elephant seals |
title_full |
Stable carbon and nitrogen isotope variations in canine dentine growth layers of Kerguelen southern elephant seals |
title_fullStr |
Stable carbon and nitrogen isotope variations in canine dentine growth layers of Kerguelen southern elephant seals |
title_full_unstemmed |
Stable carbon and nitrogen isotope variations in canine dentine growth layers of Kerguelen southern elephant seals |
title_sort |
stable carbon and nitrogen isotope variations in canine dentine growth layers of kerguelen southern elephant seals |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.science/hal-00649619 https://doi.org/10.3354/meps09331 |
geographic |
Antarctic Kerguelen |
geographic_facet |
Antarctic Kerguelen |
genre |
Antarc* Antarctic Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal Southern Elephant Seals |
genre_facet |
Antarc* Antarctic Elephant Seal Elephant Seals Mirounga leonina Southern Elephant Seal Southern Elephant Seals |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-00649619 Marine Ecology Progress Series, 2011, 439, pp.295-305. ⟨10.3354/meps09331⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps09331 hal-00649619 https://hal.science/hal-00649619 doi:10.3354/meps09331 |
op_doi |
https://doi.org/10.3354/meps09331 |
container_title |
Marine Ecology Progress Series |
container_volume |
439 |
container_start_page |
295 |
op_container_end_page |
305 |
_version_ |
1766272103291551744 |