Ontogenetic changes in habitat and trophic ecology of the giant Antarctic octopus Megaleledone setebos inferred from stable isotope analyses in beaks
International audience The giant Antarctic Octopus Megaleledone setebos is the largest Southern Ocean octopod whose ecology is poorly known. Here, we study ontogenetic shifts of habitat and trophic ecology of M. setebos throughout its life cycle by stable isotopic analysis of δ13C and δ15N on its be...
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Online Access: | https://hal.archives-ouvertes.fr/hal-02484602 https://doi.org/10.1007/s00227-020-3666-2 |
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ftunivnantes:oai:HAL:hal-02484602v1 2023-05-15T13:44:26+02:00 Ontogenetic changes in habitat and trophic ecology of the giant Antarctic octopus Megaleledone setebos inferred from stable isotope analyses in beaks Queirós, José Pedro Fenwick, Mark Stevens, Darren W. Cherel, Yves Ramos, Jaime A. Xavier, J.-C. Marine and Environmental Sciences Centre (MARE UC) Universidade de Coimbra Coimbra National Institute of Water and Atmospheric Research Wellington (NIWA) 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) 2020 https://hal.archives-ouvertes.fr/hal-02484602 https://doi.org/10.1007/s00227-020-3666-2 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00227-020-3666-2 hal-02484602 https://hal.archives-ouvertes.fr/hal-02484602 doi:10.1007/s00227-020-3666-2 ISSN: 0025-3162 EISSN: 1432-1793 Marine Biology https://hal.archives-ouvertes.fr/hal-02484602 Marine Biology, 2020, 167 (56), pp.1-9. ⟨10.1007/s00227-020-3666-2⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2020 ftunivnantes https://doi.org/10.1007/s00227-020-3666-2 2023-01-04T00:00:30Z International audience The giant Antarctic Octopus Megaleledone setebos is the largest Southern Ocean octopod whose ecology is poorly known. Here, we study ontogenetic shifts of habitat and trophic ecology of M. setebos throughout its life cycle by stable isotopic analysis of δ13C and δ15N on its beaks collected from the diet of Antarctic toothfish in Amundsen and Ross Seas (Antarctica). Values of δ13C (from -24.3 ‰ to -19.4 ‰) differed between beaks of individuals from different capture locations, thus reflecting the ability of M. setebos living in different habitats. Despite sequential sampling along beaks showed a small (<2.3 ‰), but significant, variation in lower beak’s δ13C values, a relation with δ15N values suggest that such differences are related to changes in the diet with M. setebos inhabiting the same area its entire life. Values of δ15N differed between beaks of individuals from different capture locations, suggesting that different habitats of M. setebos are associated with different diets. Serial sampling along the beaks (from +4.2 to +10.7 ‰) suggests an ontogenetic change of, at least, one trophic level. We also report a capture of two large intact specimens from Dumont D’Urville Sea (Antarctica): a male with 1150 mm of total length and 18 300 g of mass and a female with 1030 mm of total length and 10 061 g of mass. The beaks of these both specimens, confirmed to be of M. setebos through genetic analysis, were also used to confirm the identification of M. setebos collected from Antarctic toothfish stomachs. Article in Journal/Newspaper Antarc* Antarctic Antarctic Octopus Antarctic Toothfish Antarctica D’Urville Sea Giant Antarctic Octopus Megaleledone Setebos Southern Ocean Université de Nantes: HAL-UNIV-NANTES Antarctic Dumont d’Urville ENVELOPE(140.000,140.000,-66.667,-66.667) Southern Ocean Marine Biology 167 5 |
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Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Queirós, José Pedro Fenwick, Mark Stevens, Darren W. Cherel, Yves Ramos, Jaime A. Xavier, J.-C. Ontogenetic changes in habitat and trophic ecology of the giant Antarctic octopus Megaleledone setebos inferred from stable isotope analyses in beaks |
topic_facet |
[SDE]Environmental Sciences |
description |
International audience The giant Antarctic Octopus Megaleledone setebos is the largest Southern Ocean octopod whose ecology is poorly known. Here, we study ontogenetic shifts of habitat and trophic ecology of M. setebos throughout its life cycle by stable isotopic analysis of δ13C and δ15N on its beaks collected from the diet of Antarctic toothfish in Amundsen and Ross Seas (Antarctica). Values of δ13C (from -24.3 ‰ to -19.4 ‰) differed between beaks of individuals from different capture locations, thus reflecting the ability of M. setebos living in different habitats. Despite sequential sampling along beaks showed a small (<2.3 ‰), but significant, variation in lower beak’s δ13C values, a relation with δ15N values suggest that such differences are related to changes in the diet with M. setebos inhabiting the same area its entire life. Values of δ15N differed between beaks of individuals from different capture locations, suggesting that different habitats of M. setebos are associated with different diets. Serial sampling along the beaks (from +4.2 to +10.7 ‰) suggests an ontogenetic change of, at least, one trophic level. We also report a capture of two large intact specimens from Dumont D’Urville Sea (Antarctica): a male with 1150 mm of total length and 18 300 g of mass and a female with 1030 mm of total length and 10 061 g of mass. The beaks of these both specimens, confirmed to be of M. setebos through genetic analysis, were also used to confirm the identification of M. setebos collected from Antarctic toothfish stomachs. |
author2 |
Marine and Environmental Sciences Centre (MARE UC) Universidade de Coimbra Coimbra National Institute of Water and Atmospheric Research Wellington (NIWA) 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) |
format |
Article in Journal/Newspaper |
author |
Queirós, José Pedro Fenwick, Mark Stevens, Darren W. Cherel, Yves Ramos, Jaime A. Xavier, J.-C. |
author_facet |
Queirós, José Pedro Fenwick, Mark Stevens, Darren W. Cherel, Yves Ramos, Jaime A. Xavier, J.-C. |
author_sort |
Queirós, José Pedro |
title |
Ontogenetic changes in habitat and trophic ecology of the giant Antarctic octopus Megaleledone setebos inferred from stable isotope analyses in beaks |
title_short |
Ontogenetic changes in habitat and trophic ecology of the giant Antarctic octopus Megaleledone setebos inferred from stable isotope analyses in beaks |
title_full |
Ontogenetic changes in habitat and trophic ecology of the giant Antarctic octopus Megaleledone setebos inferred from stable isotope analyses in beaks |
title_fullStr |
Ontogenetic changes in habitat and trophic ecology of the giant Antarctic octopus Megaleledone setebos inferred from stable isotope analyses in beaks |
title_full_unstemmed |
Ontogenetic changes in habitat and trophic ecology of the giant Antarctic octopus Megaleledone setebos inferred from stable isotope analyses in beaks |
title_sort |
ontogenetic changes in habitat and trophic ecology of the giant antarctic octopus megaleledone setebos inferred from stable isotope analyses in beaks |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.archives-ouvertes.fr/hal-02484602 https://doi.org/10.1007/s00227-020-3666-2 |
long_lat |
ENVELOPE(140.000,140.000,-66.667,-66.667) |
geographic |
Antarctic Dumont d’Urville Southern Ocean |
geographic_facet |
Antarctic Dumont d’Urville Southern Ocean |
genre |
Antarc* Antarctic Antarctic Octopus Antarctic Toothfish Antarctica D’Urville Sea Giant Antarctic Octopus Megaleledone Setebos Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Octopus Antarctic Toothfish Antarctica D’Urville Sea Giant Antarctic Octopus Megaleledone Setebos Southern Ocean |
op_source |
ISSN: 0025-3162 EISSN: 1432-1793 Marine Biology https://hal.archives-ouvertes.fr/hal-02484602 Marine Biology, 2020, 167 (56), pp.1-9. ⟨10.1007/s00227-020-3666-2⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00227-020-3666-2 hal-02484602 https://hal.archives-ouvertes.fr/hal-02484602 doi:10.1007/s00227-020-3666-2 |
op_doi |
https://doi.org/10.1007/s00227-020-3666-2 |
container_title |
Marine Biology |
container_volume |
167 |
container_issue |
5 |
_version_ |
1766201548208078848 |