Dietary evidence for spatial foraging segregation in sympatric albatrosses ( Diomedea spp.) rearing chicks at Iles Nuageuses, Kerguelen
The food of three closely related and sympatric species of mollymawks (Diomedea spp.), the black-browed (BBA, D. melanophrys), grey-headed (GHA, D. chrysostoma) and yellow-nosed (YNA, D. chlororhynchos) albatrosses, was compared at Iles Nuageuses, Kerguelen, during the chick-rearing period. BBA prey...
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Language: | English |
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2002
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Online Access: | https://oceanrep.geomar.de/id/eprint/53284/ https://oceanrep.geomar.de/id/eprint/53284/1/4055.pdf https://doi.org/10.1007/s00227-002-0907-5 |
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ftoceanrep:oai:oceanrep.geomar.de:53284 2023-05-15T13:55:37+02:00 Dietary evidence for spatial foraging segregation in sympatric albatrosses ( Diomedea spp.) rearing chicks at Iles Nuageuses, Kerguelen Cherel, Y. Weimerskirch, H. Trouvé, C. 2002-12-01 text https://oceanrep.geomar.de/id/eprint/53284/ https://oceanrep.geomar.de/id/eprint/53284/1/4055.pdf https://doi.org/10.1007/s00227-002-0907-5 en eng Springer https://oceanrep.geomar.de/id/eprint/53284/1/4055.pdf Cherel, Y., Weimerskirch, H. and Trouvé, C. (2002) Dietary evidence for spatial foraging segregation in sympatric albatrosses ( Diomedea spp.) rearing chicks at Iles Nuageuses, Kerguelen. Marine Biology, 141 (6). pp. 1117-1129. DOI 10.1007/s00227-002-0907-5 <https://doi.org/10.1007/s00227-002-0907-5>. doi:10.1007/s00227-002-0907-5 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2002 ftoceanrep https://doi.org/10.1007/s00227-002-0907-5 2023-04-07T15:57:22Z The food of three closely related and sympatric species of mollymawks (Diomedea spp.), the black-browed (BBA, D. melanophrys), grey-headed (GHA, D. chrysostoma) and yellow-nosed (YNA, D. chlororhynchos) albatrosses, was compared at Iles Nuageuses, Kerguelen, during the chick-rearing period. BBA preyed almost equally upon cephalopods (39% by fresh mass), fish (31%) and penguins (31%), while GHA fed more on squids (52%, 16% and 28%, respectively) and YNA fed more on fish and not on penguins (13%, 84% and 0%, respectively). Crustaceans were always a minor component of the diet (<3%). Patagonian toothfish was the main fish prey, and Todarodes sp. the main cephalopod prey for the community. Accumulated beaks emphasise the importance of juvenile ommastrephid squids in the diet of mollymawks, accounting for 81%, 71% and 55% of the total number of beaks in BBA, GHA and YNA samples, respectively. BBA preyed also upon a significant number of the octopod Benthoctopus thielei (12%) and of the cranchiid squid Galiteuthis glacialis (4%), while GHA fed more on G. glacialis (18%) and on the onychoteuthid Kondakovia longimana (8%). When feeding on the same prey, prey size was similar for the albatross species. Comparison of overall prey biogeography together with the presence/absence of prey species indicators of water masses indicates segregation through different foraging areas among the three mollymawks. BBA forage almost exclusively over the shelf and upper slope waters surrounding the Kerguelen Archipelago. By contrast, GHA and YNA feed mainly in oceanic waters, YNA favouring the warm subtropical waters, and GHA the cold Antarctic waters. It is thus remarkable that birds from the same breeding grounds forage over such a wide latitudinal range, from about 35–40°S to 60–65°S, encompassing the Subtropical Zone for YNA, the Antarctic Zone for GHA and the Antarctic Polar Frontal Zone (where Kerguelen is located) for the three species. Article in Journal/Newspaper Antarc* Antarctic Patagonian Toothfish OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Iles Nuageuses ENVELOPE(68.716,68.716,-48.632,-48.632) Kerguelen The Antarctic Marine Biology 141 6 1117 1129 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The food of three closely related and sympatric species of mollymawks (Diomedea spp.), the black-browed (BBA, D. melanophrys), grey-headed (GHA, D. chrysostoma) and yellow-nosed (YNA, D. chlororhynchos) albatrosses, was compared at Iles Nuageuses, Kerguelen, during the chick-rearing period. BBA preyed almost equally upon cephalopods (39% by fresh mass), fish (31%) and penguins (31%), while GHA fed more on squids (52%, 16% and 28%, respectively) and YNA fed more on fish and not on penguins (13%, 84% and 0%, respectively). Crustaceans were always a minor component of the diet (<3%). Patagonian toothfish was the main fish prey, and Todarodes sp. the main cephalopod prey for the community. Accumulated beaks emphasise the importance of juvenile ommastrephid squids in the diet of mollymawks, accounting for 81%, 71% and 55% of the total number of beaks in BBA, GHA and YNA samples, respectively. BBA preyed also upon a significant number of the octopod Benthoctopus thielei (12%) and of the cranchiid squid Galiteuthis glacialis (4%), while GHA fed more on G. glacialis (18%) and on the onychoteuthid Kondakovia longimana (8%). When feeding on the same prey, prey size was similar for the albatross species. Comparison of overall prey biogeography together with the presence/absence of prey species indicators of water masses indicates segregation through different foraging areas among the three mollymawks. BBA forage almost exclusively over the shelf and upper slope waters surrounding the Kerguelen Archipelago. By contrast, GHA and YNA feed mainly in oceanic waters, YNA favouring the warm subtropical waters, and GHA the cold Antarctic waters. It is thus remarkable that birds from the same breeding grounds forage over such a wide latitudinal range, from about 35–40°S to 60–65°S, encompassing the Subtropical Zone for YNA, the Antarctic Zone for GHA and the Antarctic Polar Frontal Zone (where Kerguelen is located) for the three species. |
format |
Article in Journal/Newspaper |
author |
Cherel, Y. Weimerskirch, H. Trouvé, C. |
spellingShingle |
Cherel, Y. Weimerskirch, H. Trouvé, C. Dietary evidence for spatial foraging segregation in sympatric albatrosses ( Diomedea spp.) rearing chicks at Iles Nuageuses, Kerguelen |
author_facet |
Cherel, Y. Weimerskirch, H. Trouvé, C. |
author_sort |
Cherel, Y. |
title |
Dietary evidence for spatial foraging segregation in sympatric albatrosses ( Diomedea spp.) rearing chicks at Iles Nuageuses, Kerguelen |
title_short |
Dietary evidence for spatial foraging segregation in sympatric albatrosses ( Diomedea spp.) rearing chicks at Iles Nuageuses, Kerguelen |
title_full |
Dietary evidence for spatial foraging segregation in sympatric albatrosses ( Diomedea spp.) rearing chicks at Iles Nuageuses, Kerguelen |
title_fullStr |
Dietary evidence for spatial foraging segregation in sympatric albatrosses ( Diomedea spp.) rearing chicks at Iles Nuageuses, Kerguelen |
title_full_unstemmed |
Dietary evidence for spatial foraging segregation in sympatric albatrosses ( Diomedea spp.) rearing chicks at Iles Nuageuses, Kerguelen |
title_sort |
dietary evidence for spatial foraging segregation in sympatric albatrosses ( diomedea spp.) rearing chicks at iles nuageuses, kerguelen |
publisher |
Springer |
publishDate |
2002 |
url |
https://oceanrep.geomar.de/id/eprint/53284/ https://oceanrep.geomar.de/id/eprint/53284/1/4055.pdf https://doi.org/10.1007/s00227-002-0907-5 |
long_lat |
ENVELOPE(68.716,68.716,-48.632,-48.632) |
geographic |
Antarctic Iles Nuageuses Kerguelen The Antarctic |
geographic_facet |
Antarctic Iles Nuageuses Kerguelen The Antarctic |
genre |
Antarc* Antarctic Patagonian Toothfish |
genre_facet |
Antarc* Antarctic Patagonian Toothfish |
op_relation |
https://oceanrep.geomar.de/id/eprint/53284/1/4055.pdf Cherel, Y., Weimerskirch, H. and Trouvé, C. (2002) Dietary evidence for spatial foraging segregation in sympatric albatrosses ( Diomedea spp.) rearing chicks at Iles Nuageuses, Kerguelen. Marine Biology, 141 (6). pp. 1117-1129. DOI 10.1007/s00227-002-0907-5 <https://doi.org/10.1007/s00227-002-0907-5>. doi:10.1007/s00227-002-0907-5 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s00227-002-0907-5 |
container_title |
Marine Biology |
container_volume |
141 |
container_issue |
6 |
container_start_page |
1117 |
op_container_end_page |
1129 |
_version_ |
1766262370493005824 |