Influence of artificial food provisioning from fisheries on killer whale reproductive output
International audience Prey availability is a critical factor influencing demographic trajectories of longlived, top predators, which may therefore be strongly affected by artificial food provisioning. In the Crozet archipelago, killer whales feed on a wide range of species including birds, marine m...
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Online Access: | https://hal.archives-ouvertes.fr/hal-01060213 https://doi.org/10.1111/acv.12161 |
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ftccsdartic:oai:HAL:hal-01060213v1 2023-05-15T17:03:25+02:00 Influence of artificial food provisioning from fisheries on killer whale reproductive output Tixier, Paul Authier, M. Gasco, Nicolas Guinet, Christophe Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Observatoire PELAGIS UMS 3462 (PELAGIS) LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU) 2015 https://hal.archives-ouvertes.fr/hal-01060213 https://doi.org/10.1111/acv.12161 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/acv.12161 hal-01060213 https://hal.archives-ouvertes.fr/hal-01060213 doi:10.1111/acv.12161 ISSN: 1367-9430 Animal Conservation https://hal.archives-ouvertes.fr/hal-01060213 Animal Conservation, Wiley, 2015, 18, pp.207-218. ⟨10.1111/acv.12161⟩ depredation demography top predator food provisioning longlines killer whale fisheries reproduction [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2015 ftccsdartic https://doi.org/10.1111/acv.12161 2021-12-19T03:02:41Z International audience Prey availability is a critical factor influencing demographic trajectories of longlived, top predators, which may therefore be strongly affected by artificial food provisioning. In the Crozet archipelago, killer whales feed on a wide range of species including birds, marine mammals and fish. Following the development of the Patagonian toothfish fisheries in 1996, killer whales began to also depredate longlines. Social groups, hereafter referred to as matrilines, exhibited different levels of interaction; some were involved in most of the depredation events, while others were never observed interacting with fisheries. These differences in interaction levels influenced reproduction. An extensive photo-identification effort from 2003 to 2012 allowed us to estimate the probability of calving for 21 reproductive females. Using multi-model inference, we found a positive effect of depredation on female calving rate. These results suggest an effect of artificial food provisioning on female reproductive output with potentially far-reaching consequences on the demography of the Crozet killer whale population. Our findings evidence the need to account for both intra-population heterogeneity and level of interaction with fisheries when assessing conservation strategies of long-lived marine predators involved in similar depredation worldwide. Article in Journal/Newspaper Killer Whale Patagonian Toothfish Killer whale Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Animal Conservation 18 2 207 218 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
depredation demography top predator food provisioning longlines killer whale fisheries reproduction [SDE]Environmental Sciences |
spellingShingle |
depredation demography top predator food provisioning longlines killer whale fisheries reproduction [SDE]Environmental Sciences Tixier, Paul Authier, M. Gasco, Nicolas Guinet, Christophe Influence of artificial food provisioning from fisheries on killer whale reproductive output |
topic_facet |
depredation demography top predator food provisioning longlines killer whale fisheries reproduction [SDE]Environmental Sciences |
description |
International audience Prey availability is a critical factor influencing demographic trajectories of longlived, top predators, which may therefore be strongly affected by artificial food provisioning. In the Crozet archipelago, killer whales feed on a wide range of species including birds, marine mammals and fish. Following the development of the Patagonian toothfish fisheries in 1996, killer whales began to also depredate longlines. Social groups, hereafter referred to as matrilines, exhibited different levels of interaction; some were involved in most of the depredation events, while others were never observed interacting with fisheries. These differences in interaction levels influenced reproduction. An extensive photo-identification effort from 2003 to 2012 allowed us to estimate the probability of calving for 21 reproductive females. Using multi-model inference, we found a positive effect of depredation on female calving rate. These results suggest an effect of artificial food provisioning on female reproductive output with potentially far-reaching consequences on the demography of the Crozet killer whale population. Our findings evidence the need to account for both intra-population heterogeneity and level of interaction with fisheries when assessing conservation strategies of long-lived marine predators involved in similar depredation worldwide. |
author2 |
Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) Observatoire PELAGIS UMS 3462 (PELAGIS) LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU) |
format |
Article in Journal/Newspaper |
author |
Tixier, Paul Authier, M. Gasco, Nicolas Guinet, Christophe |
author_facet |
Tixier, Paul Authier, M. Gasco, Nicolas Guinet, Christophe |
author_sort |
Tixier, Paul |
title |
Influence of artificial food provisioning from fisheries on killer whale reproductive output |
title_short |
Influence of artificial food provisioning from fisheries on killer whale reproductive output |
title_full |
Influence of artificial food provisioning from fisheries on killer whale reproductive output |
title_fullStr |
Influence of artificial food provisioning from fisheries on killer whale reproductive output |
title_full_unstemmed |
Influence of artificial food provisioning from fisheries on killer whale reproductive output |
title_sort |
influence of artificial food provisioning from fisheries on killer whale reproductive output |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.archives-ouvertes.fr/hal-01060213 https://doi.org/10.1111/acv.12161 |
genre |
Killer Whale Patagonian Toothfish Killer whale |
genre_facet |
Killer Whale Patagonian Toothfish Killer whale |
op_source |
ISSN: 1367-9430 Animal Conservation https://hal.archives-ouvertes.fr/hal-01060213 Animal Conservation, Wiley, 2015, 18, pp.207-218. ⟨10.1111/acv.12161⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/acv.12161 hal-01060213 https://hal.archives-ouvertes.fr/hal-01060213 doi:10.1111/acv.12161 |
op_doi |
https://doi.org/10.1111/acv.12161 |
container_title |
Animal Conservation |
container_volume |
18 |
container_issue |
2 |
container_start_page |
207 |
op_container_end_page |
218 |
_version_ |
1766057286384484352 |