High variability in migration and wintering strategies of brown skuas (Catharacta antarctica lonnbergi) in the Indian Ocean
International audience Movements of brown skuas (Catharacta antarctica lonnbergi) originating from two populations in the southern Indian Ocean were studied during the nonbreeding period using geolocation. A total of 33 individuals were equipped resulting in 34 annual tracks recovered from 50 deploy...
Published in: | Polar Biology |
---|---|
Main Authors: | , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2018
|
Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-01848711 https://hal.archives-ouvertes.fr/hal-01848711/document https://hal.archives-ouvertes.fr/hal-01848711/file/300_2017_2169_Author.pdf https://doi.org/10.1007/s00300-017-2169-1 |
id |
ftccsdartic:oai:HAL:hal-01848711v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-01848711v1 2023-05-15T13:53:10+02:00 High variability in migration and wintering strategies of brown skuas (Catharacta antarctica lonnbergi) in the Indian Ocean Delord, Karine Cherel, Yves Barbraud, Christophe Chastel, Olivier Weimerskirch, Henri 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) 2018 https://hal.archives-ouvertes.fr/hal-01848711 https://hal.archives-ouvertes.fr/hal-01848711/document https://hal.archives-ouvertes.fr/hal-01848711/file/300_2017_2169_Author.pdf https://doi.org/10.1007/s00300-017-2169-1 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-017-2169-1 hal-01848711 https://hal.archives-ouvertes.fr/hal-01848711 https://hal.archives-ouvertes.fr/hal-01848711/document https://hal.archives-ouvertes.fr/hal-01848711/file/300_2017_2169_Author.pdf doi:10.1007/s00300-017-2169-1 info:eu-repo/semantics/OpenAccess ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.archives-ouvertes.fr/hal-01848711 Polar Biology, Springer Verlag, 2018, 41 (1), pp.59-70. ⟨10.1007/s00300-017-2169-1⟩ Stable isotopes Phenology Intraspecific strategies Geolocator Activity Feather [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology info:eu-repo/semantics/article Journal articles 2018 ftccsdartic https://doi.org/10.1007/s00300-017-2169-1 2021-11-07T02:48:24Z International audience Movements of brown skuas (Catharacta antarctica lonnbergi) originating from two populations in the southern Indian Ocean were studied during the nonbreeding period using geolocation. A total of 33 individuals were equipped resulting in 34 annual tracks recovered from 50 deployments. Brown skuas varied extensively in their post-breeding movements, from true long range migrations to reach distant wintering zones, to short movements in the vicinity of breeding grounds. Overall, brown skuas migrated northward to overwinter in different areas in the southern hemisphere; individuals remained in the Indian Ocean, except two that overwintered in the Benguela Current (Atlantic Ocean). Wintering grounds were generally situated in productive dynamic upwelling waters or frontal systems. Brown skuas avoided the less productive area of the South Subtropical Gyre in the Central Indian Ocean. Individuals clearly differed in migratory strategies, targeting areas in a continuum from the sub-Antarctic to the tropics. Inter-individual differences were not sex-dependent. The migration dates varied between sexes with females leaving the breeding sites earlier and returning later compared to males. The duration of migration depended on wintering area and sex. Males had shorter migrations than females, regardless of the wintering area. Isotopic signatures clearly indicated that birds moulted in the wintering area and during migration. The low δ 15N values of feathers that grew in mixed subtropical-sub-Antarctic waters suggest that skuas fed on low trophic level prey in these areas. The origin and consequences of such strong inter-individual variation in migratory strategies requires further investigation. Article in Journal/Newspaper Antarc* Antarctic Antarctica Polar Biology Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Indian Polar Biology 41 1 59 70 |
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 |
Stable isotopes Phenology Intraspecific strategies Geolocator Activity Feather [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology |
spellingShingle |
Stable isotopes Phenology Intraspecific strategies Geolocator Activity Feather [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology Delord, Karine Cherel, Yves Barbraud, Christophe Chastel, Olivier Weimerskirch, Henri High variability in migration and wintering strategies of brown skuas (Catharacta antarctica lonnbergi) in the Indian Ocean |
topic_facet |
Stable isotopes Phenology Intraspecific strategies Geolocator Activity Feather [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.MCG]Environmental Sciences/Global Changes [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology |
description |
International audience Movements of brown skuas (Catharacta antarctica lonnbergi) originating from two populations in the southern Indian Ocean were studied during the nonbreeding period using geolocation. A total of 33 individuals were equipped resulting in 34 annual tracks recovered from 50 deployments. Brown skuas varied extensively in their post-breeding movements, from true long range migrations to reach distant wintering zones, to short movements in the vicinity of breeding grounds. Overall, brown skuas migrated northward to overwinter in different areas in the southern hemisphere; individuals remained in the Indian Ocean, except two that overwintered in the Benguela Current (Atlantic Ocean). Wintering grounds were generally situated in productive dynamic upwelling waters or frontal systems. Brown skuas avoided the less productive area of the South Subtropical Gyre in the Central Indian Ocean. Individuals clearly differed in migratory strategies, targeting areas in a continuum from the sub-Antarctic to the tropics. Inter-individual differences were not sex-dependent. The migration dates varied between sexes with females leaving the breeding sites earlier and returning later compared to males. The duration of migration depended on wintering area and sex. Males had shorter migrations than females, regardless of the wintering area. Isotopic signatures clearly indicated that birds moulted in the wintering area and during migration. The low δ 15N values of feathers that grew in mixed subtropical-sub-Antarctic waters suggest that skuas fed on low trophic level prey in these areas. The origin and consequences of such strong inter-individual variation in migratory strategies requires further investigation. |
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) |
format |
Article in Journal/Newspaper |
author |
Delord, Karine Cherel, Yves Barbraud, Christophe Chastel, Olivier Weimerskirch, Henri |
author_facet |
Delord, Karine Cherel, Yves Barbraud, Christophe Chastel, Olivier Weimerskirch, Henri |
author_sort |
Delord, Karine |
title |
High variability in migration and wintering strategies of brown skuas (Catharacta antarctica lonnbergi) in the Indian Ocean |
title_short |
High variability in migration and wintering strategies of brown skuas (Catharacta antarctica lonnbergi) in the Indian Ocean |
title_full |
High variability in migration and wintering strategies of brown skuas (Catharacta antarctica lonnbergi) in the Indian Ocean |
title_fullStr |
High variability in migration and wintering strategies of brown skuas (Catharacta antarctica lonnbergi) in the Indian Ocean |
title_full_unstemmed |
High variability in migration and wintering strategies of brown skuas (Catharacta antarctica lonnbergi) in the Indian Ocean |
title_sort |
high variability in migration and wintering strategies of brown skuas (catharacta antarctica lonnbergi) in the indian ocean |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.archives-ouvertes.fr/hal-01848711 https://hal.archives-ouvertes.fr/hal-01848711/document https://hal.archives-ouvertes.fr/hal-01848711/file/300_2017_2169_Author.pdf https://doi.org/10.1007/s00300-017-2169-1 |
geographic |
Antarctic Indian |
geographic_facet |
Antarctic Indian |
genre |
Antarc* Antarctic Antarctica Polar Biology |
genre_facet |
Antarc* Antarctic Antarctica Polar Biology |
op_source |
ISSN: 0722-4060 EISSN: 1432-2056 Polar Biology https://hal.archives-ouvertes.fr/hal-01848711 Polar Biology, Springer Verlag, 2018, 41 (1), pp.59-70. ⟨10.1007/s00300-017-2169-1⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00300-017-2169-1 hal-01848711 https://hal.archives-ouvertes.fr/hal-01848711 https://hal.archives-ouvertes.fr/hal-01848711/document https://hal.archives-ouvertes.fr/hal-01848711/file/300_2017_2169_Author.pdf doi:10.1007/s00300-017-2169-1 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1007/s00300-017-2169-1 |
container_title |
Polar Biology |
container_volume |
41 |
container_issue |
1 |
container_start_page |
59 |
op_container_end_page |
70 |
_version_ |
1766258139523448832 |