Inter-population segregation in the wintering areas of macaroni penguins
How top avian predators are distributed at sea during the inter-breeding period remains poorly known. Here we focused on the pelagic seabird that is the single greatest avian consumer of marine resources: the macaroni penguin. Our aims were (1) to investigate where these penguins are distributed whi...
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ftnerc:oai:nora.nerc.ac.uk:13385 2023-05-15T17:02:06+02:00 Inter-population segregation in the wintering areas of macaroni penguins Thiebot, Jean-Baptiste Cherel, Yves Trathan, Phil N. Bost, Charles-André 2011 text http://nora.nerc.ac.uk/id/eprint/13385/ https://nora.nerc.ac.uk/id/eprint/13385/1/m421p279.pdf http://www.int-res.com/articles/meps_oa/m421p279.pdf en eng Inter Research https://nora.nerc.ac.uk/id/eprint/13385/1/m421p279.pdf Thiebot, Jean-Baptiste; Cherel, Yves; Trathan, Phil N. orcid:0000-0001-6673-9930 Bost, Charles-André. 2011 Inter-population segregation in the wintering areas of macaroni penguins. Marine Ecology Progress Series, 421. 279-290. https://doi.org/10.3354/meps08907 <https://doi.org/10.3354/meps08907> Marine Sciences Zoology Ecology and Environment Publication - Article PeerReviewed 2011 ftnerc https://doi.org/10.3354/meps08907 2023-02-04T19:28:34Z How top avian predators are distributed at sea during the inter-breeding period remains poorly known. Here we focused on the pelagic seabird that is the single greatest avian consumer of marine resources: the macaroni penguin. Our aims were (1) to investigate where these penguins are distributed whilst at sea during winter, and (2) to determine how their distribution and trophic ecology varies in 1 colony between successive years and between 2 colonies from neighbouring localities at the same time. We surveyed a total of 30 penguins from Crozet and Kerguelen Islands (southern Indian Ocean). Penguins from Kerguelen were tracked in 2006 and 2007, and those from Crozet in 2007. Habitat use was investigated using miniaturised light-based geolocators, and trophic ecology by the use of stable isotope analyses. Results showed large-scale patterns of distribution over deep oceanic waters of the Polar Frontal Zone characterised by a temperature of 3.0 to 3.5°C during July. Birds from Kerguelen had a consistent inter-annual winter distribution at the population level. Birds tracked from Crozet were distributed in distinct areas, separate from the birds from Kerguelen. Trophic ecology (blood δ15N value) was very similar between years and colonies, and indicated that these penguins preyed upon low trophic level prey, most probably swarming crustaceans, at the end of winter. We conclude that inter-annual fidelity in winter habitat provides evidence of highly favourable and predictable foraging areas, while the distinct inter-colony distributions suggest very heterogeneous distribution of profitable feeding areas for this species in the southern Indian Ocean. Article in Journal/Newspaper Kerguelen Islands Macaroni penguin Natural Environment Research Council: NERC Open Research Archive Indian Kerguelen Kerguelen Islands Marine Ecology Progress Series 421 279 290 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Marine Sciences Zoology Ecology and Environment |
spellingShingle |
Marine Sciences Zoology Ecology and Environment Thiebot, Jean-Baptiste Cherel, Yves Trathan, Phil N. Bost, Charles-André Inter-population segregation in the wintering areas of macaroni penguins |
topic_facet |
Marine Sciences Zoology Ecology and Environment |
description |
How top avian predators are distributed at sea during the inter-breeding period remains poorly known. Here we focused on the pelagic seabird that is the single greatest avian consumer of marine resources: the macaroni penguin. Our aims were (1) to investigate where these penguins are distributed whilst at sea during winter, and (2) to determine how their distribution and trophic ecology varies in 1 colony between successive years and between 2 colonies from neighbouring localities at the same time. We surveyed a total of 30 penguins from Crozet and Kerguelen Islands (southern Indian Ocean). Penguins from Kerguelen were tracked in 2006 and 2007, and those from Crozet in 2007. Habitat use was investigated using miniaturised light-based geolocators, and trophic ecology by the use of stable isotope analyses. Results showed large-scale patterns of distribution over deep oceanic waters of the Polar Frontal Zone characterised by a temperature of 3.0 to 3.5°C during July. Birds from Kerguelen had a consistent inter-annual winter distribution at the population level. Birds tracked from Crozet were distributed in distinct areas, separate from the birds from Kerguelen. Trophic ecology (blood δ15N value) was very similar between years and colonies, and indicated that these penguins preyed upon low trophic level prey, most probably swarming crustaceans, at the end of winter. We conclude that inter-annual fidelity in winter habitat provides evidence of highly favourable and predictable foraging areas, while the distinct inter-colony distributions suggest very heterogeneous distribution of profitable feeding areas for this species in the southern Indian Ocean. |
format |
Article in Journal/Newspaper |
author |
Thiebot, Jean-Baptiste Cherel, Yves Trathan, Phil N. Bost, Charles-André |
author_facet |
Thiebot, Jean-Baptiste Cherel, Yves Trathan, Phil N. Bost, Charles-André |
author_sort |
Thiebot, Jean-Baptiste |
title |
Inter-population segregation in the wintering areas of macaroni penguins |
title_short |
Inter-population segregation in the wintering areas of macaroni penguins |
title_full |
Inter-population segregation in the wintering areas of macaroni penguins |
title_fullStr |
Inter-population segregation in the wintering areas of macaroni penguins |
title_full_unstemmed |
Inter-population segregation in the wintering areas of macaroni penguins |
title_sort |
inter-population segregation in the wintering areas of macaroni penguins |
publisher |
Inter Research |
publishDate |
2011 |
url |
http://nora.nerc.ac.uk/id/eprint/13385/ https://nora.nerc.ac.uk/id/eprint/13385/1/m421p279.pdf http://www.int-res.com/articles/meps_oa/m421p279.pdf |
geographic |
Indian Kerguelen Kerguelen Islands |
geographic_facet |
Indian Kerguelen Kerguelen Islands |
genre |
Kerguelen Islands Macaroni penguin |
genre_facet |
Kerguelen Islands Macaroni penguin |
op_relation |
https://nora.nerc.ac.uk/id/eprint/13385/1/m421p279.pdf Thiebot, Jean-Baptiste; Cherel, Yves; Trathan, Phil N. orcid:0000-0001-6673-9930 Bost, Charles-André. 2011 Inter-population segregation in the wintering areas of macaroni penguins. Marine Ecology Progress Series, 421. 279-290. https://doi.org/10.3354/meps08907 <https://doi.org/10.3354/meps08907> |
op_doi |
https://doi.org/10.3354/meps08907 |
container_title |
Marine Ecology Progress Series |
container_volume |
421 |
container_start_page |
279 |
op_container_end_page |
290 |
_version_ |
1766055352618450944 |