Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands
Feeding ecology and isotopic niche of the wandering albatross Diomedea exulans were investigated in the poorly studied population on the Kerguelen Islands and compared to that on the Crozet Islands. Fish (48% by mass) and cephalopods (46%) were similarly important in chick food at Kerguelen, while c...
Published in: | Marine Ecology Progress Series |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Inter-Research
2017
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/516309/ https://nora.nerc.ac.uk/id/eprint/516309/1/Cherel.pdf https://doi.org/10.3354/meps11994 |
id |
ftnerc:oai:nora.nerc.ac.uk:516309 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:516309 2023-05-15T15:59:32+02:00 Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands Cherel, Yves Xavier, Jose C. de Grissac, Sophie Trouvé, Colette Weimerskirch, Henri 2017-02 text http://nora.nerc.ac.uk/id/eprint/516309/ https://nora.nerc.ac.uk/id/eprint/516309/1/Cherel.pdf https://doi.org/10.3354/meps11994 en eng Inter-Research https://nora.nerc.ac.uk/id/eprint/516309/1/Cherel.pdf Cherel, Yves; Xavier, Jose C. orcid:0000-0002-9621-6660 de Grissac, Sophie; Trouvé, Colette; Weimerskirch, Henri. 2017 Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands. Marine Ecology Progress Series, 565. 197-215. https://doi.org/10.3354/meps11994 <https://doi.org/10.3354/meps11994> cc_by_4 CC-BY Publication - Article PeerReviewed 2017 ftnerc https://doi.org/10.3354/meps11994 2023-02-04T19:44:32Z Feeding ecology and isotopic niche of the wandering albatross Diomedea exulans were investigated in the poorly studied population on the Kerguelen Islands and compared to that on the Crozet Islands. Fish (48% by mass) and cephalopods (46%) were similarly important in chick food at Kerguelen, while cephalopods (87%) dominated the diet at Crozet. Fish prey included mainly deep-sea species, with the Patagonian toothfish Dissostichus eleginoides being the 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. Histioteuthis atlantica (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%) dominated at Crozet. Chick feather δ15N values were higher in wandering albatrosses than in other oceanic seabirds of the 2 communities, indicating that the wandering albatross is an apex consumer together with the sperm whale and sleeper shark that have similar δ15N values. Satellite-tracked wandering albatrosses foraged in local subantarctic waters and farther north, with some Crozet 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 Crozet indicated the presence of a fairly large number of illegal longliners in the area during the Austral winter 1998. A review of the feeding habits of Diomedea spp. highlights the need for more dietary investigations to achieve effective conservation and management of this endangered group of charismatic seabirds. Article in Journal/Newspaper Crozet Islands Diomedea exulans Kerguelen Islands Patagonian Toothfish Sperm whale Wandering Albatross Natural Environment Research Council: NERC Open Research Archive Austral Kerguelen Kerguelen Islands Marine Ecology Progress Series 565 197 215 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Feeding ecology and isotopic niche of the wandering albatross Diomedea exulans were investigated in the poorly studied population on the Kerguelen Islands and compared to that on the Crozet Islands. Fish (48% by mass) and cephalopods (46%) were similarly important in chick food at Kerguelen, while cephalopods (87%) dominated the diet at Crozet. Fish prey included mainly deep-sea species, with the Patagonian toothfish Dissostichus eleginoides being the 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. Histioteuthis atlantica (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%) dominated at Crozet. Chick feather δ15N values were higher in wandering albatrosses than in other oceanic seabirds of the 2 communities, indicating that the wandering albatross is an apex consumer together with the sperm whale and sleeper shark that have similar δ15N values. Satellite-tracked wandering albatrosses foraged in local subantarctic waters and farther north, with some Crozet 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 Crozet indicated the presence of a fairly large number of illegal longliners in the area during the Austral winter 1998. A review of the feeding habits of Diomedea spp. highlights the need for more dietary investigations to achieve effective conservation and management of this endangered group of charismatic seabirds. |
format |
Article in Journal/Newspaper |
author |
Cherel, Yves Xavier, Jose C. de Grissac, Sophie Trouvé, Colette Weimerskirch, Henri |
spellingShingle |
Cherel, Yves Xavier, Jose 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 |
author_facet |
Cherel, Yves Xavier, Jose 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 |
Inter-Research |
publishDate |
2017 |
url |
http://nora.nerc.ac.uk/id/eprint/516309/ https://nora.nerc.ac.uk/id/eprint/516309/1/Cherel.pdf https://doi.org/10.3354/meps11994 |
geographic |
Austral Kerguelen Kerguelen Islands |
geographic_facet |
Austral Kerguelen Kerguelen Islands |
genre |
Crozet Islands Diomedea exulans Kerguelen Islands Patagonian Toothfish Sperm whale Wandering Albatross |
genre_facet |
Crozet Islands Diomedea exulans Kerguelen Islands Patagonian Toothfish Sperm whale Wandering Albatross |
op_relation |
https://nora.nerc.ac.uk/id/eprint/516309/1/Cherel.pdf Cherel, Yves; Xavier, Jose C. orcid:0000-0002-9621-6660 de Grissac, Sophie; Trouvé, Colette; Weimerskirch, Henri. 2017 Feeding ecology, isotopic niche, and ingestion of fishery-related items of the wandering albatross Diomedea exulans at Kerguelen and Crozet Islands. Marine Ecology Progress Series, 565. 197-215. https://doi.org/10.3354/meps11994 <https://doi.org/10.3354/meps11994> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
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_ |
1766395475624198144 |