Ecological tracers and at-sea observations document the foraging ecology of southern long-finned pilot whales (Globicephala melas edwardii) in Kerguelen waters
International audience The food and feeding ecology of the poorly known southern long-finned pilot whale (Globicephala melas edwardii) was investigated using ecological tracers (muscle and skin δ13C and δ15N, and total mercury, Hg) on individuals from two mass strandings together with at-sea observa...
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Online Access: | https://hal.science/hal-01150197 https://hal.science/hal-01150197/document https://hal.science/hal-01150197/file/Fontaine%20et%20al%202015%20MARBIOL.pdf https://doi.org/10.1007/s00227-014-2587-3 |
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ftsorbonneuniv:oai:HAL:hal-01150197v1 2024-02-11T10:08:52+01:00 Ecological tracers and at-sea observations document the foraging ecology of southern long-finned pilot whales (Globicephala melas edwardii) in Kerguelen waters Fontaine, Marina Carravieri, Alice Simon-Bouhet, Benoit Bustamante, Paco Gasco, Nicolas Bailleul, Frédéric Guinet, Christophe Cherel, Yves 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) LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) 2015 https://hal.science/hal-01150197 https://hal.science/hal-01150197/document https://hal.science/hal-01150197/file/Fontaine%20et%20al%202015%20MARBIOL.pdf https://doi.org/10.1007/s00227-014-2587-3 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00227-014-2587-3 hal-01150197 https://hal.science/hal-01150197 https://hal.science/hal-01150197/document https://hal.science/hal-01150197/file/Fontaine%20et%20al%202015%20MARBIOL.pdf doi:10.1007/s00227-014-2587-3 info:eu-repo/semantics/OpenAccess ISSN: 0025-3162 EISSN: 1432-1793 Marine Biology https://hal.science/hal-01150197 Marine Biology, 2015, 162, pp.207-219. ⟨10.1007/s00227-014-2587-3⟩ marine mammal mercury stable isotopes [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology info:eu-repo/semantics/article Journal articles 2015 ftsorbonneuniv https://doi.org/10.1007/s00227-014-2587-3 2024-01-23T23:57:58Z International audience The food and feeding ecology of the poorly known southern long-finned pilot whale (Globicephala melas edwardii) was investigated using ecological tracers (muscle and skin δ13C and δ15N, and total mercury, Hg) on individuals from two mass strandings together with at-sea observations of live animals in Kerguelen waters, southern Indian Ocean. Sightings of cetaceans from long-liners over 9 years (2003–2012) emphasized the regular occurrence of pilot whales in slope waters surrounding the archipelago. Tissue δ13C values (a proxy of consumer foraging habitat) suggest that pilot whales fed in slope waters and in oceanic subantarctic waters over the last months preceding stranding. Tissue δ15N values and Hg concentration (dietary proxies) indicate a high trophic position (~4.7) for the pilot whales, likely corresponding to a mixed diet of fish and squid (not crustaceans) of undetermined species. Both skin and muscle Hg concentrations were positively and linearly correlated to individual size with no concomitant δ15N changes, which can be interpreted as a progressive Hg accumulation in tissues of individuals throughout life with no parallel dietary shift. Skin and muscle Hg concentrations were linearly and positively related; hence, Hg skin could be used as a proxy of Hg concentration in muscle (a main Hg reservoir of the body). Kerguelen southern long-finned pilot whales were less Hg contaminated than most pilot whale populations studied so far, thus suggesting that they are not at a high risk to Hg-induced damages in the remote islands of the Southern Ocean. Article in Journal/Newspaper Southern Ocean HAL Sorbonne Université Southern Ocean Kerguelen Indian Marine Biology 162 1 207 219 |
institution |
Open Polar |
collection |
HAL Sorbonne Université |
op_collection_id |
ftsorbonneuniv |
language |
English |
topic |
marine mammal mercury stable isotopes [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
spellingShingle |
marine mammal mercury stable isotopes [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology Fontaine, Marina Carravieri, Alice Simon-Bouhet, Benoit Bustamante, Paco Gasco, Nicolas Bailleul, Frédéric Guinet, Christophe Cherel, Yves Ecological tracers and at-sea observations document the foraging ecology of southern long-finned pilot whales (Globicephala melas edwardii) in Kerguelen waters |
topic_facet |
marine mammal mercury stable isotopes [SDV.TOX.ECO]Life Sciences [q-bio]/Toxicology/Ecotoxicology |
description |
International audience The food and feeding ecology of the poorly known southern long-finned pilot whale (Globicephala melas edwardii) was investigated using ecological tracers (muscle and skin δ13C and δ15N, and total mercury, Hg) on individuals from two mass strandings together with at-sea observations of live animals in Kerguelen waters, southern Indian Ocean. Sightings of cetaceans from long-liners over 9 years (2003–2012) emphasized the regular occurrence of pilot whales in slope waters surrounding the archipelago. Tissue δ13C values (a proxy of consumer foraging habitat) suggest that pilot whales fed in slope waters and in oceanic subantarctic waters over the last months preceding stranding. Tissue δ15N values and Hg concentration (dietary proxies) indicate a high trophic position (~4.7) for the pilot whales, likely corresponding to a mixed diet of fish and squid (not crustaceans) of undetermined species. Both skin and muscle Hg concentrations were positively and linearly correlated to individual size with no concomitant δ15N changes, which can be interpreted as a progressive Hg accumulation in tissues of individuals throughout life with no parallel dietary shift. Skin and muscle Hg concentrations were linearly and positively related; hence, Hg skin could be used as a proxy of Hg concentration in muscle (a main Hg reservoir of the body). Kerguelen southern long-finned pilot whales were less Hg contaminated than most pilot whale populations studied so far, thus suggesting that they are not at a high risk to Hg-induced damages in the remote islands of the Southern Ocean. |
author2 |
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) LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA) |
format |
Article in Journal/Newspaper |
author |
Fontaine, Marina Carravieri, Alice Simon-Bouhet, Benoit Bustamante, Paco Gasco, Nicolas Bailleul, Frédéric Guinet, Christophe Cherel, Yves |
author_facet |
Fontaine, Marina Carravieri, Alice Simon-Bouhet, Benoit Bustamante, Paco Gasco, Nicolas Bailleul, Frédéric Guinet, Christophe Cherel, Yves |
author_sort |
Fontaine, Marina |
title |
Ecological tracers and at-sea observations document the foraging ecology of southern long-finned pilot whales (Globicephala melas edwardii) in Kerguelen waters |
title_short |
Ecological tracers and at-sea observations document the foraging ecology of southern long-finned pilot whales (Globicephala melas edwardii) in Kerguelen waters |
title_full |
Ecological tracers and at-sea observations document the foraging ecology of southern long-finned pilot whales (Globicephala melas edwardii) in Kerguelen waters |
title_fullStr |
Ecological tracers and at-sea observations document the foraging ecology of southern long-finned pilot whales (Globicephala melas edwardii) in Kerguelen waters |
title_full_unstemmed |
Ecological tracers and at-sea observations document the foraging ecology of southern long-finned pilot whales (Globicephala melas edwardii) in Kerguelen waters |
title_sort |
ecological tracers and at-sea observations document the foraging ecology of southern long-finned pilot whales (globicephala melas edwardii) in kerguelen waters |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01150197 https://hal.science/hal-01150197/document https://hal.science/hal-01150197/file/Fontaine%20et%20al%202015%20MARBIOL.pdf https://doi.org/10.1007/s00227-014-2587-3 |
geographic |
Southern Ocean Kerguelen Indian |
geographic_facet |
Southern Ocean Kerguelen Indian |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0025-3162 EISSN: 1432-1793 Marine Biology https://hal.science/hal-01150197 Marine Biology, 2015, 162, pp.207-219. ⟨10.1007/s00227-014-2587-3⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00227-014-2587-3 hal-01150197 https://hal.science/hal-01150197 https://hal.science/hal-01150197/document https://hal.science/hal-01150197/file/Fontaine%20et%20al%202015%20MARBIOL.pdf doi:10.1007/s00227-014-2587-3 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1007/s00227-014-2587-3 |
container_title |
Marine Biology |
container_volume |
162 |
container_issue |
1 |
container_start_page |
207 |
op_container_end_page |
219 |
_version_ |
1790608500815036416 |