Increasing numbers of killer whale individuals use fisheries as feeding opportunities within subantarctic populations
International audience Fisheries can generate feeding opportunities for large marine predators in the form of discards or accessible catch. How the use of this anthropogenic food may spread as a new behaviour, across individuals within populations over time, is poorly understood. This study used a 1...
Published in: | Biology Letters |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://hal.science/hal-03572821 https://doi.org/10.1098/rsbl.2021.0328 |
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ftunimontpellier:oai:HAL:hal-03572821v1 2024-04-21T08:06:30+00:00 Increasing numbers of killer whale individuals use fisheries as feeding opportunities within subantarctic populations Amelot, Morgane Plard, Floriane Guinet, Christophe Arnould, John Gasco, Nicolas Tixier, Paul School of Life and Environmental Sciences Deakin University Burwood Department of Aquaculture and Fish Biology Holar University College 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) MARine Biodiversity Exploitation and Conservation - MARBEC (UMR MARBEC ) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM) ANR-17-CE32-0007,OrcaDepred,OrcaDepred - Evaluation des conséquences écologiques et socio-économiques de la déprédation exercée par les cétacés sur les pêcheries à la palangre : Mise en œuvre d'une approche technico-économique en vue de sa suppression(2017) 2022-02 https://hal.science/hal-03572821 https://doi.org/10.1098/rsbl.2021.0328 en eng HAL CCSD Royal Society, The info:eu-repo/semantics/altIdentifier/doi/10.1098/rsbl.2021.0328 hal-03572821 https://hal.science/hal-03572821 doi:10.1098/rsbl.2021.0328 ISSN: 1744-9561 Biology Letters https://hal.science/hal-03572821 Biology Letters, 2022, 18 (2), ⟨10.1098/rsbl.2021.0328⟩ killer whales depredation capture–mark–recapture [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2022 ftunimontpellier https://doi.org/10.1098/rsbl.2021.0328 2024-03-27T16:05:10Z International audience Fisheries can generate feeding opportunities for large marine predators in the form of discards or accessible catch. How the use of this anthropogenic food may spread as a new behaviour, across individuals within populations over time, is poorly understood. This study used a 16-year (2003–2018) monitoring of two killer whale Orcinus orca subantarctic populations ( regular and Type-D at Crozet), and Bayesian multistate capture–mark–recapture models, to assess temporal changes in the number of individuals feeding on fish caught on hooks (‘depredation’ behaviour) of a fishery started in 1996. For both populations, the number of depredating individuals increased during the study period (34 to 94 for regular 17 to 43 for Type-D ). Increasing abundance is unlikely to account for this and, rather, the results suggest depredation was acquired by increasing numbers of existing individuals. For regular killer whales, a plateau reached from 2014 suggests that it took 18 years for the behaviour to spread across the whole population. A more recent plateau was apparent for Type-D s but additional years are needed to confirm this. These findings show how changes in prey availability caused by human activities lead to rapid, yet progressive, innovations in killer whales, likely altering the ecological role of this top-predator. Article in Journal/Newspaper Killer Whale Orca Orcinus orca Killer whale Université de Montpellier: HAL Biology Letters 18 2 |
institution |
Open Polar |
collection |
Université de Montpellier: HAL |
op_collection_id |
ftunimontpellier |
language |
English |
topic |
killer whales depredation capture–mark–recapture [SDE]Environmental Sciences |
spellingShingle |
killer whales depredation capture–mark–recapture [SDE]Environmental Sciences Amelot, Morgane Plard, Floriane Guinet, Christophe Arnould, John Gasco, Nicolas Tixier, Paul Increasing numbers of killer whale individuals use fisheries as feeding opportunities within subantarctic populations |
topic_facet |
killer whales depredation capture–mark–recapture [SDE]Environmental Sciences |
description |
International audience Fisheries can generate feeding opportunities for large marine predators in the form of discards or accessible catch. How the use of this anthropogenic food may spread as a new behaviour, across individuals within populations over time, is poorly understood. This study used a 16-year (2003–2018) monitoring of two killer whale Orcinus orca subantarctic populations ( regular and Type-D at Crozet), and Bayesian multistate capture–mark–recapture models, to assess temporal changes in the number of individuals feeding on fish caught on hooks (‘depredation’ behaviour) of a fishery started in 1996. For both populations, the number of depredating individuals increased during the study period (34 to 94 for regular 17 to 43 for Type-D ). Increasing abundance is unlikely to account for this and, rather, the results suggest depredation was acquired by increasing numbers of existing individuals. For regular killer whales, a plateau reached from 2014 suggests that it took 18 years for the behaviour to spread across the whole population. A more recent plateau was apparent for Type-D s but additional years are needed to confirm this. These findings show how changes in prey availability caused by human activities lead to rapid, yet progressive, innovations in killer whales, likely altering the ecological role of this top-predator. |
author2 |
School of Life and Environmental Sciences Deakin University Burwood Department of Aquaculture and Fish Biology Holar University College 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) MARine Biodiversity Exploitation and Conservation - MARBEC (UMR MARBEC ) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM) ANR-17-CE32-0007,OrcaDepred,OrcaDepred - Evaluation des conséquences écologiques et socio-économiques de la déprédation exercée par les cétacés sur les pêcheries à la palangre : Mise en œuvre d'une approche technico-économique en vue de sa suppression(2017) |
format |
Article in Journal/Newspaper |
author |
Amelot, Morgane Plard, Floriane Guinet, Christophe Arnould, John Gasco, Nicolas Tixier, Paul |
author_facet |
Amelot, Morgane Plard, Floriane Guinet, Christophe Arnould, John Gasco, Nicolas Tixier, Paul |
author_sort |
Amelot, Morgane |
title |
Increasing numbers of killer whale individuals use fisheries as feeding opportunities within subantarctic populations |
title_short |
Increasing numbers of killer whale individuals use fisheries as feeding opportunities within subantarctic populations |
title_full |
Increasing numbers of killer whale individuals use fisheries as feeding opportunities within subantarctic populations |
title_fullStr |
Increasing numbers of killer whale individuals use fisheries as feeding opportunities within subantarctic populations |
title_full_unstemmed |
Increasing numbers of killer whale individuals use fisheries as feeding opportunities within subantarctic populations |
title_sort |
increasing numbers of killer whale individuals use fisheries as feeding opportunities within subantarctic populations |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03572821 https://doi.org/10.1098/rsbl.2021.0328 |
genre |
Killer Whale Orca Orcinus orca Killer whale |
genre_facet |
Killer Whale Orca Orcinus orca Killer whale |
op_source |
ISSN: 1744-9561 Biology Letters https://hal.science/hal-03572821 Biology Letters, 2022, 18 (2), ⟨10.1098/rsbl.2021.0328⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1098/rsbl.2021.0328 hal-03572821 https://hal.science/hal-03572821 doi:10.1098/rsbl.2021.0328 |
op_doi |
https://doi.org/10.1098/rsbl.2021.0328 |
container_title |
Biology Letters |
container_volume |
18 |
container_issue |
2 |
_version_ |
1796945893724782592 |