Exploitation of distant Antarctic waters and close shelf-break waters by white-chinned petrels rearing chicks
International audience The foraging ecology of white-chinned petrels Procellaria aequinoctialis rearing chicks was examined at the Crozet Islands in the Southern Ocean, based on satellite tracking, diet and provisioning studies. White-chinned petrels from the Crozet Islands exploit a wide variety of...
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fttriple:oai:gotriple.eu:10670/1.rk16y1 2023-05-15T13:58:38+02:00 Exploitation of distant Antarctic waters and close shelf-break waters by white-chinned petrels rearing chicks Cherel, Yves Weimerskirch, Henri Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) 2000-01-01 https://hal.archives-ouvertes.fr/hal-00193352 en eng HAL CCSD Inter Research hal-00193352 10670/1.rk16y1 https://hal.archives-ouvertes.fr/hal-00193352 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series Marine Ecology Progress Series, Inter Research, 2000, 194, pp.249-261 geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2000 fttriple 2023-01-22T17:38:32Z International audience The foraging ecology of white-chinned petrels Procellaria aequinoctialis rearing chicks was examined at the Crozet Islands in the Southern Ocean, based on satellite tracking, diet and provisioning studies. White-chinned petrels from the Crozet Islands exploit a wide variety of marine environments ranging from sub-tropical waters to the limit of pack-ice at the edge of the Antarctic continent. This capability was made possible by the use of a 2-fold strategy whereby adults exploit alternatively distant oceanic waters and neritic slope waters in the v~cinityo f the breedng grounds. On average the birds conducted a long foraging trip followed by 2.2 short trips. During trips of long duration over oceanic waters, birds tended to commute mainly to cold, deep Antarctic waters where most foraging activity took place. They commuted from and returned to Crozet at high speeds (mean 31 and 34 km h-' respectively) with a mean foraging range of 1868 km (maximum 2421 km). In Antarctic waters, the white-chinned petrel appears to feed mainly on pelagc fishes and on Antarctic knll Euphausia superba and concentrates its efforts in waters with sea-surface temperatures of 2°C. During short trips the birds commuted to the Crozet shelf break, where they fed mainly on fish. Diet samples delivered to chicks after short trips indicate that adults relied at least in part on food made available by longliners as baits and discards. Despite its small size compared to albatrosses, the white-chinned petrel from Crozet appears to be a particularly wide-ranging species and an opportunistic feeder in terms of the marine environment exploited, which explains its wide dstribution in the Southern Ocean. This study highlights the particular importance of Antarctic waters for this sub-Antarctic species during the chick-rearing period, i.e. in summer when the retreat of the pack-ice makes abundant resources such as Antarctic krill available. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Crozet Islands Euphausia superba Southern Ocean Unknown Antarctic Southern Ocean The Antarctic |
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English |
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geo envir Cherel, Yves Weimerskirch, Henri Exploitation of distant Antarctic waters and close shelf-break waters by white-chinned petrels rearing chicks |
topic_facet |
geo envir |
description |
International audience The foraging ecology of white-chinned petrels Procellaria aequinoctialis rearing chicks was examined at the Crozet Islands in the Southern Ocean, based on satellite tracking, diet and provisioning studies. White-chinned petrels from the Crozet Islands exploit a wide variety of marine environments ranging from sub-tropical waters to the limit of pack-ice at the edge of the Antarctic continent. This capability was made possible by the use of a 2-fold strategy whereby adults exploit alternatively distant oceanic waters and neritic slope waters in the v~cinityo f the breedng grounds. On average the birds conducted a long foraging trip followed by 2.2 short trips. During trips of long duration over oceanic waters, birds tended to commute mainly to cold, deep Antarctic waters where most foraging activity took place. They commuted from and returned to Crozet at high speeds (mean 31 and 34 km h-' respectively) with a mean foraging range of 1868 km (maximum 2421 km). In Antarctic waters, the white-chinned petrel appears to feed mainly on pelagc fishes and on Antarctic knll Euphausia superba and concentrates its efforts in waters with sea-surface temperatures of 2°C. During short trips the birds commuted to the Crozet shelf break, where they fed mainly on fish. Diet samples delivered to chicks after short trips indicate that adults relied at least in part on food made available by longliners as baits and discards. Despite its small size compared to albatrosses, the white-chinned petrel from Crozet appears to be a particularly wide-ranging species and an opportunistic feeder in terms of the marine environment exploited, which explains its wide dstribution in the Southern Ocean. This study highlights the particular importance of Antarctic waters for this sub-Antarctic species during the chick-rearing period, i.e. in summer when the retreat of the pack-ice makes abundant resources such as Antarctic krill available. |
author2 |
Centre d'études biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Cherel, Yves Weimerskirch, Henri |
author_facet |
Cherel, Yves Weimerskirch, Henri |
author_sort |
Cherel, Yves |
title |
Exploitation of distant Antarctic waters and close shelf-break waters by white-chinned petrels rearing chicks |
title_short |
Exploitation of distant Antarctic waters and close shelf-break waters by white-chinned petrels rearing chicks |
title_full |
Exploitation of distant Antarctic waters and close shelf-break waters by white-chinned petrels rearing chicks |
title_fullStr |
Exploitation of distant Antarctic waters and close shelf-break waters by white-chinned petrels rearing chicks |
title_full_unstemmed |
Exploitation of distant Antarctic waters and close shelf-break waters by white-chinned petrels rearing chicks |
title_sort |
exploitation of distant antarctic waters and close shelf-break waters by white-chinned petrels rearing chicks |
publisher |
HAL CCSD |
publishDate |
2000 |
url |
https://hal.archives-ouvertes.fr/hal-00193352 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Crozet Islands Euphausia superba Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Crozet Islands Euphausia superba Southern Ocean |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series Marine Ecology Progress Series, Inter Research, 2000, 194, pp.249-261 |
op_relation |
hal-00193352 10670/1.rk16y1 https://hal.archives-ouvertes.fr/hal-00193352 |
op_rights |
undefined |
_version_ |
1766266991240282112 |