Depredation of Patagonian toothfish (Dissostichus eleginoides) by two sympatrically occurring killer whale (Orcinus orca) ecotypes: Insights on the behavior of the rarely observed type D killer whales
International audience Sympatric forms of ecologically distinctive killer whales (Orcinus orca) have beendocumented worldwide. This study focused on a new case of such sympatric occurrenceof the “Crozet” type and the recently described “type D” killer whales off theCrozet Islands. The two ecotypes a...
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Online Access: | https://hal.archives-ouvertes.fr/hal-01295094 https://doi.org/10.1111/mms.12307 |
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ftunivnantes:oai:HAL:hal-01295094v1 2023-05-15T17:03:25+02:00 Depredation of Patagonian toothfish (Dissostichus eleginoides) by two sympatrically occurring killer whale (Orcinus orca) ecotypes: Insights on the behavior of the rarely observed type D killer whales Tixier, Paul Gasco, Nicolas Duhamel, Guy Guinet, Christophe 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) 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) Département Milieux et Peuplements Aquatiques Muséum national d'Histoire naturelle (MNHN) 2016 https://hal.archives-ouvertes.fr/hal-01295094 https://doi.org/10.1111/mms.12307 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/mms.12307 hal-01295094 https://hal.archives-ouvertes.fr/hal-01295094 doi:10.1111/mms.12307 ISSN: 0824-0469 EISSN: 1748-7692 Marine Mammal Science https://hal.archives-ouvertes.fr/hal-01295094 Marine Mammal Science, 2016, 32 (3), pp.983-1003. ⟨10.1111/mms.12307⟩ killer whale subantarctic type D ecotype depredation Orcinus orca fisheries [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2016 ftunivnantes https://doi.org/10.1111/mms.12307 2023-01-04T00:07:19Z International audience Sympatric forms of ecologically distinctive killer whales (Orcinus orca) have beendocumented worldwide. This study focused on a new case of such sympatric occurrenceof the “Crozet” type and the recently described “type D” killer whales off theCrozet Islands. The two ecotypes are morphologically and genetically distinct, butthey both depredate the same local longline fishery. We used observational,photo-identification, and fishing data, collected between 2003 and 2015, to examinedifferences in their patterns of depredation. Of the 828 sets where ecotype could beconfirmed, type D killer whales interacted with 82 (11%) of the sets, including 9(1%) sets that were simultaneously depredated by both ecotypes. Associationsbetween the two types were never observed. Type D killer whales typically occurredin larger groups and both ecotypes preferentially depredated Patagonian toothfish(Dissostichus eleginoides). GLMM modeling revealed that the probability of type Ddepredation significantly increased throughout the study period, especially in deepwaters, and photo-identification data suggested that a subset of all individuals werehabituating to depredation. This study documents the partitioning of resourcesbetween two distinct ecotypes of killer whales and provides preliminary insight intothe feeding ecology of the rare type D killer whale. Article in Journal/Newspaper Killer Whale Orca Orcinus orca Patagonian Toothfish Killer whale Université de Nantes: HAL-UNIV-NANTES Marine Mammal Science 32 3 983 1003 |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
killer whale subantarctic type D ecotype depredation Orcinus orca fisheries [SDE]Environmental Sciences |
spellingShingle |
killer whale subantarctic type D ecotype depredation Orcinus orca fisheries [SDE]Environmental Sciences Tixier, Paul Gasco, Nicolas Duhamel, Guy Guinet, Christophe Depredation of Patagonian toothfish (Dissostichus eleginoides) by two sympatrically occurring killer whale (Orcinus orca) ecotypes: Insights on the behavior of the rarely observed type D killer whales |
topic_facet |
killer whale subantarctic type D ecotype depredation Orcinus orca fisheries [SDE]Environmental Sciences |
description |
International audience Sympatric forms of ecologically distinctive killer whales (Orcinus orca) have beendocumented worldwide. This study focused on a new case of such sympatric occurrenceof the “Crozet” type and the recently described “type D” killer whales off theCrozet Islands. The two ecotypes are morphologically and genetically distinct, butthey both depredate the same local longline fishery. We used observational,photo-identification, and fishing data, collected between 2003 and 2015, to examinedifferences in their patterns of depredation. Of the 828 sets where ecotype could beconfirmed, type D killer whales interacted with 82 (11%) of the sets, including 9(1%) sets that were simultaneously depredated by both ecotypes. Associationsbetween the two types were never observed. Type D killer whales typically occurredin larger groups and both ecotypes preferentially depredated Patagonian toothfish(Dissostichus eleginoides). GLMM modeling revealed that the probability of type Ddepredation significantly increased throughout the study period, especially in deepwaters, and photo-identification data suggested that a subset of all individuals werehabituating to depredation. This study documents the partitioning of resourcesbetween two distinct ecotypes of killer whales and provides preliminary insight intothe feeding ecology of the rare type D killer whale. |
author2 |
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) 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) Département Milieux et Peuplements Aquatiques Muséum national d'Histoire naturelle (MNHN) |
format |
Article in Journal/Newspaper |
author |
Tixier, Paul Gasco, Nicolas Duhamel, Guy Guinet, Christophe |
author_facet |
Tixier, Paul Gasco, Nicolas Duhamel, Guy Guinet, Christophe |
author_sort |
Tixier, Paul |
title |
Depredation of Patagonian toothfish (Dissostichus eleginoides) by two sympatrically occurring killer whale (Orcinus orca) ecotypes: Insights on the behavior of the rarely observed type D killer whales |
title_short |
Depredation of Patagonian toothfish (Dissostichus eleginoides) by two sympatrically occurring killer whale (Orcinus orca) ecotypes: Insights on the behavior of the rarely observed type D killer whales |
title_full |
Depredation of Patagonian toothfish (Dissostichus eleginoides) by two sympatrically occurring killer whale (Orcinus orca) ecotypes: Insights on the behavior of the rarely observed type D killer whales |
title_fullStr |
Depredation of Patagonian toothfish (Dissostichus eleginoides) by two sympatrically occurring killer whale (Orcinus orca) ecotypes: Insights on the behavior of the rarely observed type D killer whales |
title_full_unstemmed |
Depredation of Patagonian toothfish (Dissostichus eleginoides) by two sympatrically occurring killer whale (Orcinus orca) ecotypes: Insights on the behavior of the rarely observed type D killer whales |
title_sort |
depredation of patagonian toothfish (dissostichus eleginoides) by two sympatrically occurring killer whale (orcinus orca) ecotypes: insights on the behavior of the rarely observed type d killer whales |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.archives-ouvertes.fr/hal-01295094 https://doi.org/10.1111/mms.12307 |
genre |
Killer Whale Orca Orcinus orca Patagonian Toothfish Killer whale |
genre_facet |
Killer Whale Orca Orcinus orca Patagonian Toothfish Killer whale |
op_source |
ISSN: 0824-0469 EISSN: 1748-7692 Marine Mammal Science https://hal.archives-ouvertes.fr/hal-01295094 Marine Mammal Science, 2016, 32 (3), pp.983-1003. ⟨10.1111/mms.12307⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/mms.12307 hal-01295094 https://hal.archives-ouvertes.fr/hal-01295094 doi:10.1111/mms.12307 |
op_doi |
https://doi.org/10.1111/mms.12307 |
container_title |
Marine Mammal Science |
container_volume |
32 |
container_issue |
3 |
container_start_page |
983 |
op_container_end_page |
1003 |
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1766057289826959360 |