Moult location and diet of auks in the North Sea inferred from coupled light-based and isotope-based geolocation
Many pelagic seabirds moult their feathers while at sea, which is an energetically costly behaviour. Mortality rates during moult can be high, so spatial and trophic ecology during this critical period is important for understanding demographic patterns. Unfortunately, individual foraging behaviours...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/520561/ https://nora.nerc.ac.uk/id/eprint/520561/1/N520561JA.pdf https://doi.org/10.3354/meps12624 |
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ftnerc:oai:nora.nerc.ac.uk:520561 2023-05-15T13:12:18+02:00 Moult location and diet of auks in the North Sea inferred from coupled light-based and isotope-based geolocation St John Glew, Katie Wanless, Sarah Harris, Michael P. Daunt, Francis Erikstad, Kjell Einar Strøm, Hallvard Trueman, Clive N. 2018-07 text http://nora.nerc.ac.uk/id/eprint/520561/ https://nora.nerc.ac.uk/id/eprint/520561/1/N520561JA.pdf https://doi.org/10.3354/meps12624 en eng Inter Research https://nora.nerc.ac.uk/id/eprint/520561/1/N520561JA.pdf St John Glew, Katie; Wanless, Sarah; Harris, Michael P.; Daunt, Francis; Erikstad, Kjell Einar; Strøm, Hallvard; Trueman, Clive N. 2018 Moult location and diet of auks in the North Sea inferred from coupled light-based and isotope-based geolocation. Marine Ecology Progress Series, 599. 239-251. https://doi.org/10.3354/meps12624 <https://doi.org/10.3354/meps12624> cc_by_4 CC-BY Ecology and Environment Publication - Article PeerReviewed 2018 ftnerc https://doi.org/10.3354/meps12624 2023-02-04T19:46:51Z Many pelagic seabirds moult their feathers while at sea, which is an energetically costly behaviour. Mortality rates during moult can be high, so spatial and trophic ecology during this critical period is important for understanding demographic patterns. Unfortunately, individual foraging behaviours specifically linked to at-sea moulting are commonly unclear. This paper combines 2 different approaches to geolocation: data from bird-borne geolocation loggers and stable-isotope assignment using carbon and nitrogen isotope maps (isoscapes). Coupling 2 geolocation processes allows some uncertainties associated with isotope-based assignment to be constrained. We applied this approach to quantify species-specific foraging locations and individual trophic variability during feather regrowth in 3 sympatric auk populations breeding on the Isle of May, Scotland (common guillemot Uria aalge, razorbill Alca torda and Atlantic puffin Fratercula arctica). Inferred foraging areas during moult differed between species and feather types. Guillemots likely underwent moult within the southern North Sea, razorbills along the east coast of England and into the southern North Sea and puffins off the east coast of Scotland. Estimates of individual trophic position varied considerably within feather types (up to 1 trophic level difference between individuals), among feather types grown during different time periods and across the 3 species, with guillemots consistently foraging at higher trophic positions than razorbills and puffins. Used in combination, these methods better constrain foraging areas during moulting, and provide a technique to explore individual differences and flexibility in foraging strategy, which is valuable information for both seabird conservation and marine spatial planning. Article in Journal/Newspaper Alca torda Atlantic puffin common guillemot fratercula Fratercula arctica Razorbill Uria aalge uria Natural Environment Research Council: NERC Open Research Archive Marine Ecology Progress Series 599 239 251 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Ecology and Environment |
spellingShingle |
Ecology and Environment St John Glew, Katie Wanless, Sarah Harris, Michael P. Daunt, Francis Erikstad, Kjell Einar Strøm, Hallvard Trueman, Clive N. Moult location and diet of auks in the North Sea inferred from coupled light-based and isotope-based geolocation |
topic_facet |
Ecology and Environment |
description |
Many pelagic seabirds moult their feathers while at sea, which is an energetically costly behaviour. Mortality rates during moult can be high, so spatial and trophic ecology during this critical period is important for understanding demographic patterns. Unfortunately, individual foraging behaviours specifically linked to at-sea moulting are commonly unclear. This paper combines 2 different approaches to geolocation: data from bird-borne geolocation loggers and stable-isotope assignment using carbon and nitrogen isotope maps (isoscapes). Coupling 2 geolocation processes allows some uncertainties associated with isotope-based assignment to be constrained. We applied this approach to quantify species-specific foraging locations and individual trophic variability during feather regrowth in 3 sympatric auk populations breeding on the Isle of May, Scotland (common guillemot Uria aalge, razorbill Alca torda and Atlantic puffin Fratercula arctica). Inferred foraging areas during moult differed between species and feather types. Guillemots likely underwent moult within the southern North Sea, razorbills along the east coast of England and into the southern North Sea and puffins off the east coast of Scotland. Estimates of individual trophic position varied considerably within feather types (up to 1 trophic level difference between individuals), among feather types grown during different time periods and across the 3 species, with guillemots consistently foraging at higher trophic positions than razorbills and puffins. Used in combination, these methods better constrain foraging areas during moulting, and provide a technique to explore individual differences and flexibility in foraging strategy, which is valuable information for both seabird conservation and marine spatial planning. |
format |
Article in Journal/Newspaper |
author |
St John Glew, Katie Wanless, Sarah Harris, Michael P. Daunt, Francis Erikstad, Kjell Einar Strøm, Hallvard Trueman, Clive N. |
author_facet |
St John Glew, Katie Wanless, Sarah Harris, Michael P. Daunt, Francis Erikstad, Kjell Einar Strøm, Hallvard Trueman, Clive N. |
author_sort |
St John Glew, Katie |
title |
Moult location and diet of auks in the North Sea inferred from coupled light-based and isotope-based geolocation |
title_short |
Moult location and diet of auks in the North Sea inferred from coupled light-based and isotope-based geolocation |
title_full |
Moult location and diet of auks in the North Sea inferred from coupled light-based and isotope-based geolocation |
title_fullStr |
Moult location and diet of auks in the North Sea inferred from coupled light-based and isotope-based geolocation |
title_full_unstemmed |
Moult location and diet of auks in the North Sea inferred from coupled light-based and isotope-based geolocation |
title_sort |
moult location and diet of auks in the north sea inferred from coupled light-based and isotope-based geolocation |
publisher |
Inter Research |
publishDate |
2018 |
url |
http://nora.nerc.ac.uk/id/eprint/520561/ https://nora.nerc.ac.uk/id/eprint/520561/1/N520561JA.pdf https://doi.org/10.3354/meps12624 |
genre |
Alca torda Atlantic puffin common guillemot fratercula Fratercula arctica Razorbill Uria aalge uria |
genre_facet |
Alca torda Atlantic puffin common guillemot fratercula Fratercula arctica Razorbill Uria aalge uria |
op_relation |
https://nora.nerc.ac.uk/id/eprint/520561/1/N520561JA.pdf St John Glew, Katie; Wanless, Sarah; Harris, Michael P.; Daunt, Francis; Erikstad, Kjell Einar; Strøm, Hallvard; Trueman, Clive N. 2018 Moult location and diet of auks in the North Sea inferred from coupled light-based and isotope-based geolocation. Marine Ecology Progress Series, 599. 239-251. https://doi.org/10.3354/meps12624 <https://doi.org/10.3354/meps12624> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3354/meps12624 |
container_title |
Marine Ecology Progress Series |
container_volume |
599 |
container_start_page |
239 |
op_container_end_page |
251 |
_version_ |
1766251244885639168 |