Variation in Antarctic Petrel Foraging Ecology: Not All Individuals Specialize on Krill
International audience Individual heterogeneity in foraging behaviour determines how individuals and populations respond to changes in the availability and distribution of resources. Antarctic krill Euphausia superba is a pivotal species in Southern Ocean food webs and an important target for Southe...
Published in: | Frontiers in Marine Science |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2022
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Subjects: | |
Online Access: | https://hal.science/hal-03650575 https://hal.science/hal-03650575/document https://hal.science/hal-03650575/file/fmars-09-809852.pdf https://doi.org/10.3389/fmars.2022.809852 |
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ftunivnantes:oai:HAL:hal-03650575v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
diet foraging seabird Antarctic krill (Euphausia superba) [SDE]Environmental Sciences |
spellingShingle |
diet foraging seabird Antarctic krill (Euphausia superba) [SDE]Environmental Sciences Descamps, Sébastien Harris, S. Fluhr, J. Bustamante, Paco Cherel, Yves Trevail, A. Brault-Favrou, Maud Patrick, Samantha Variation in Antarctic Petrel Foraging Ecology: Not All Individuals Specialize on Krill |
topic_facet |
diet foraging seabird Antarctic krill (Euphausia superba) [SDE]Environmental Sciences |
description |
International audience Individual heterogeneity in foraging behaviour determines how individuals and populations respond to changes in the availability and distribution of resources. Antarctic krill Euphausia superba is a pivotal species in Southern Ocean food webs and an important target for Southern Ocean fisheries. Changes in its abundance could dramatically impact marine predators, with effects depending on the extent to which all individuals rely on krill as prey. The Antarctic petrel Thalassoica antarctica is a high latitude seabird thought to be dependent on krill in part of its breeding range. Here, by combining fine-scale GPS tracking of petrel foraging trips with diet data, we examined the level and consistency of inter-individual variation in foraging strategies in breeding Antarctic petrels in Dronning Maud Land, Antarctica, and assessed whether all individuals share a similar reliance on Antarctic krill. We found that Antarctic petrels showed high levels of repeatability in their diet and foraging movements at sea, indicating consistent individual differences in foraging strategies. During consecutive foraging trips, petrels tend to make trips of similar lengths and durations to reach similar terminal locations and to feed on similar prey. These individual differences in diet were spatially structured, with individuals travelling towards the west consuming a more fish-based diet. These different foraging tactics did not appear to be associated with different costs and/or benefits as adult body mass, chick survival and chick growth were unrelated to birds’ foraging movements and diet. Our results show that, even if a large part of the population may be dependent on krill, some individuals specialize on fish. Such inter-individual variation in foraging suggests that this population could be more resilient to changes in the marine environment, such as a decline in krill abundance or a shift in krill distributions. |
author2 |
Norwegian Polar Institute Cornell Lab of Ornithology New York Cornell University New York LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Institut Universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) 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) Centre for Ecology and Conservation University of Exeter School of Environmental Sciences Liverpool University of Liverpool |
format |
Article in Journal/Newspaper |
author |
Descamps, Sébastien Harris, S. Fluhr, J. Bustamante, Paco Cherel, Yves Trevail, A. Brault-Favrou, Maud Patrick, Samantha |
author_facet |
Descamps, Sébastien Harris, S. Fluhr, J. Bustamante, Paco Cherel, Yves Trevail, A. Brault-Favrou, Maud Patrick, Samantha |
author_sort |
Descamps, Sébastien |
title |
Variation in Antarctic Petrel Foraging Ecology: Not All Individuals Specialize on Krill |
title_short |
Variation in Antarctic Petrel Foraging Ecology: Not All Individuals Specialize on Krill |
title_full |
Variation in Antarctic Petrel Foraging Ecology: Not All Individuals Specialize on Krill |
title_fullStr |
Variation in Antarctic Petrel Foraging Ecology: Not All Individuals Specialize on Krill |
title_full_unstemmed |
Variation in Antarctic Petrel Foraging Ecology: Not All Individuals Specialize on Krill |
title_sort |
variation in antarctic petrel foraging ecology: not all individuals specialize on krill |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03650575 https://hal.science/hal-03650575/document https://hal.science/hal-03650575/file/fmars-09-809852.pdf https://doi.org/10.3389/fmars.2022.809852 |
geographic |
Antarctic Dronning Maud Land Southern Ocean The Antarctic |
geographic_facet |
Antarctic Dronning Maud Land Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Petrel Antarctica Dronning Maud Land Euphausia superba Southern Ocean Thalassoica antarctica |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Petrel Antarctica Dronning Maud Land Euphausia superba Southern Ocean Thalassoica antarctica |
op_source |
ISSN: 2296-7745 Frontiers in Marine Science https://hal.science/hal-03650575 Frontiers in Marine Science, 2022, 9, pp.809852. ⟨10.3389/fmars.2022.809852⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3389/fmars.2022.809852 hal-03650575 https://hal.science/hal-03650575 https://hal.science/hal-03650575/document https://hal.science/hal-03650575/file/fmars-09-809852.pdf doi:10.3389/fmars.2022.809852 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3389/fmars.2022.809852 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
_version_ |
1766197790459822080 |
spelling |
ftunivnantes:oai:HAL:hal-03650575v1 2023-05-15T13:44:06+02:00 Variation in Antarctic Petrel Foraging Ecology: Not All Individuals Specialize on Krill Descamps, Sébastien Harris, S. Fluhr, J. Bustamante, Paco Cherel, Yves Trevail, A. Brault-Favrou, Maud Patrick, Samantha Norwegian Polar Institute Cornell Lab of Ornithology New York Cornell University New York LIttoral ENvironnement et Sociétés (LIENSs) La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Institut Universitaire de France (IUF) Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.) 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) Centre for Ecology and Conservation University of Exeter School of Environmental Sciences Liverpool University of Liverpool 2022-03-23 https://hal.science/hal-03650575 https://hal.science/hal-03650575/document https://hal.science/hal-03650575/file/fmars-09-809852.pdf https://doi.org/10.3389/fmars.2022.809852 en eng HAL CCSD Frontiers Media info:eu-repo/semantics/altIdentifier/doi/10.3389/fmars.2022.809852 hal-03650575 https://hal.science/hal-03650575 https://hal.science/hal-03650575/document https://hal.science/hal-03650575/file/fmars-09-809852.pdf doi:10.3389/fmars.2022.809852 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2296-7745 Frontiers in Marine Science https://hal.science/hal-03650575 Frontiers in Marine Science, 2022, 9, pp.809852. ⟨10.3389/fmars.2022.809852⟩ diet foraging seabird Antarctic krill (Euphausia superba) [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.3389/fmars.2022.809852 2023-03-08T01:31:32Z International audience Individual heterogeneity in foraging behaviour determines how individuals and populations respond to changes in the availability and distribution of resources. Antarctic krill Euphausia superba is a pivotal species in Southern Ocean food webs and an important target for Southern Ocean fisheries. Changes in its abundance could dramatically impact marine predators, with effects depending on the extent to which all individuals rely on krill as prey. The Antarctic petrel Thalassoica antarctica is a high latitude seabird thought to be dependent on krill in part of its breeding range. Here, by combining fine-scale GPS tracking of petrel foraging trips with diet data, we examined the level and consistency of inter-individual variation in foraging strategies in breeding Antarctic petrels in Dronning Maud Land, Antarctica, and assessed whether all individuals share a similar reliance on Antarctic krill. We found that Antarctic petrels showed high levels of repeatability in their diet and foraging movements at sea, indicating consistent individual differences in foraging strategies. During consecutive foraging trips, petrels tend to make trips of similar lengths and durations to reach similar terminal locations and to feed on similar prey. These individual differences in diet were spatially structured, with individuals travelling towards the west consuming a more fish-based diet. These different foraging tactics did not appear to be associated with different costs and/or benefits as adult body mass, chick survival and chick growth were unrelated to birds’ foraging movements and diet. Our results show that, even if a large part of the population may be dependent on krill, some individuals specialize on fish. Such inter-individual variation in foraging suggests that this population could be more resilient to changes in the marine environment, such as a decline in krill abundance or a shift in krill distributions. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Antarctic Petrel Antarctica Dronning Maud Land Euphausia superba Southern Ocean Thalassoica antarctica Université de Nantes: HAL-UNIV-NANTES Antarctic Dronning Maud Land Southern Ocean The Antarctic Frontiers in Marine Science 9 |