Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands
International audience Feeding ecology and isotopic niche of the wandering albatross Diomedea exulanswere investigated in the poorly studied population on the Kerguelen Islands and compared to thaton the Crozet Islands. Fish (48% by mass) and cephalopods (46%) were similarly important inchick food a...
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Format: | Article in Journal/Newspaper |
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Online Access: | https://hal.science/hal-01497879 https://doi.org/10.3354/meps11994 |
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ftunivrochelle:oai:HAL:hal-01497879v1 2024-02-11T10:03:17+01:00 Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands Cherel, Yves Xavier, José C. de Grissac, Sophie Trouvé, Colette Weimerskirch, Henri Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Marine and environmental research centre - IMAR-CMA (Coimbra, Portugal) University of Coimbra Portugal (UC) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) 2017 https://hal.science/hal-01497879 https://doi.org/10.3354/meps11994 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps11994 hal-01497879 https://hal.science/hal-01497879 doi:10.3354/meps11994 ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-01497879 Marine Ecology Progress Series, 2017, 565, pp.197-215. ⟨10.3354/meps11994⟩ Cephalopod Diet Hook Satellite tracking Seabird Southern Ocean Stable isotopes [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2017 ftunivrochelle https://doi.org/10.3354/meps11994 2024-01-23T23:35:36Z International audience Feeding ecology and isotopic niche of the wandering albatross Diomedea exulanswere investigated in the poorly studied population on the Kerguelen Islands and compared to thaton the Crozet Islands. Fish (48% by mass) and cephalopods (46%) were similarly important inchick food at Kerguelen, while cephalopods (87%) dominated the diet at Crozet. Fish preyincluded mainly deep-sea species, with the Patagonian toothfish Dissostichus eleginoides beingthe main item. Cephalopod beaks were identified, most of which were from adult oceanic squids.Albatrosses preyed upon the same taxa at both localities, but in different proportions. Histioteuthisatlantica (30% by number), Galiteuthis glacialis (13%), and Kondakovia longimana (10%)were the main squid prey at Kerguelen, while K. longimana (35%) and H. eltaninae (23%) dominatedat Crozet. Chick feather δ15N values were higher in wandering albatrosses than in otheroceanic seabirds of the 2 communities, indicating that the wandering albatross is an apex consumertogether with the sperm whale and sleeper shark that have similar δ15N values. Satellitetrackedwandering albatrosses foraged in local subantarctic waters and farther north, with someCrozet birds overlapping with those from the Kerguelen population in western Kerguelen waters.Anthropogenic items (e.g. plastic fragments, hooks) were found in half the food samples. All fishery-related items were from the local toothfish fishery. The high number of hooks from Crozetindicated the presence of a fairly large number of illegal longliners in the area during the Australwinter 1998. A review of the feeding habits of Diomedea spp. highlights the need for more dietaryinvestigations to achieve effective conservation and management of this endangered group ofcharismatic seabirds. Article in Journal/Newspaper Crozet Islands Diomedea exulans Kerguelen Islands Patagonian Toothfish Southern Ocean Sperm whale Wandering Albatross HAL - Université de La Rochelle Southern Ocean Kerguelen Kerguelen Islands Marine Ecology Progress Series 565 197 215 |
institution |
Open Polar |
collection |
HAL - Université de La Rochelle |
op_collection_id |
ftunivrochelle |
language |
English |
topic |
Cephalopod Diet Hook Satellite tracking Seabird Southern Ocean Stable isotopes [SDE]Environmental Sciences |
spellingShingle |
Cephalopod Diet Hook Satellite tracking Seabird Southern Ocean Stable isotopes [SDE]Environmental Sciences Cherel, Yves Xavier, José C. de Grissac, Sophie Trouvé, Colette Weimerskirch, Henri Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands |
topic_facet |
Cephalopod Diet Hook Satellite tracking Seabird Southern Ocean Stable isotopes [SDE]Environmental Sciences |
description |
International audience Feeding ecology and isotopic niche of the wandering albatross Diomedea exulanswere investigated in the poorly studied population on the Kerguelen Islands and compared to thaton the Crozet Islands. Fish (48% by mass) and cephalopods (46%) were similarly important inchick food at Kerguelen, while cephalopods (87%) dominated the diet at Crozet. Fish preyincluded mainly deep-sea species, with the Patagonian toothfish Dissostichus eleginoides beingthe main item. Cephalopod beaks were identified, most of which were from adult oceanic squids.Albatrosses preyed upon the same taxa at both localities, but in different proportions. Histioteuthisatlantica (30% by number), Galiteuthis glacialis (13%), and Kondakovia longimana (10%)were the main squid prey at Kerguelen, while K. longimana (35%) and H. eltaninae (23%) dominatedat Crozet. Chick feather δ15N values were higher in wandering albatrosses than in otheroceanic seabirds of the 2 communities, indicating that the wandering albatross is an apex consumertogether with the sperm whale and sleeper shark that have similar δ15N values. Satellitetrackedwandering albatrosses foraged in local subantarctic waters and farther north, with someCrozet birds overlapping with those from the Kerguelen population in western Kerguelen waters.Anthropogenic items (e.g. plastic fragments, hooks) were found in half the food samples. All fishery-related items were from the local toothfish fishery. The high number of hooks from Crozetindicated the presence of a fairly large number of illegal longliners in the area during the Australwinter 1998. A review of the feeding habits of Diomedea spp. highlights the need for more dietaryinvestigations to achieve effective conservation and management of this endangered group ofcharismatic seabirds. |
author2 |
Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC) Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS) Marine and environmental research centre - IMAR-CMA (Coimbra, Portugal) University of Coimbra Portugal (UC) British Antarctic Survey (BAS) Natural Environment Research Council (NERC) |
format |
Article in Journal/Newspaper |
author |
Cherel, Yves Xavier, José C. de Grissac, Sophie Trouvé, Colette Weimerskirch, Henri |
author_facet |
Cherel, Yves Xavier, José C. de Grissac, Sophie Trouvé, Colette Weimerskirch, Henri |
author_sort |
Cherel, Yves |
title |
Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands |
title_short |
Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands |
title_full |
Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands |
title_fullStr |
Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands |
title_full_unstemmed |
Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands |
title_sort |
feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross diomedea exulans at kerguelen and crozet islands |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.science/hal-01497879 https://doi.org/10.3354/meps11994 |
geographic |
Southern Ocean Kerguelen Kerguelen Islands |
geographic_facet |
Southern Ocean Kerguelen Kerguelen Islands |
genre |
Crozet Islands Diomedea exulans Kerguelen Islands Patagonian Toothfish Southern Ocean Sperm whale Wandering Albatross |
genre_facet |
Crozet Islands Diomedea exulans Kerguelen Islands Patagonian Toothfish Southern Ocean Sperm whale Wandering Albatross |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-01497879 Marine Ecology Progress Series, 2017, 565, pp.197-215. ⟨10.3354/meps11994⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps11994 hal-01497879 https://hal.science/hal-01497879 doi:10.3354/meps11994 |
op_doi |
https://doi.org/10.3354/meps11994 |
container_title |
Marine Ecology Progress Series |
container_volume |
565 |
container_start_page |
197 |
op_container_end_page |
215 |
_version_ |
1790599496044904448 |