Consistency in migration strategies and habitat preferences of brown skuas over two winters, a decade apart
At-sea movements and activity patterns of brown skuas Stercorarius antarcticus lonnbergi from South Georgia were analysed in 2 winters, a decade apart, to examine the degree of consistency in migration strategies and habitat preferences during the non-breeding and pre-laying exodus periods. Oceanogr...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/513990/ https://nora.nerc.ac.uk/id/eprint/513990/1/Carneiro%20et%20al%20-%20Consistency%20in%20migration%20strategies.pdf https://doi.org/10.3354/meps11781 |
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ftnerc:oai:nora.nerc.ac.uk:513990 2023-05-15T13:49:33+02:00 Consistency in migration strategies and habitat preferences of brown skuas over two winters, a decade apart Carneiro, Ana P.B. Manica, Adrea Clay, Thomas A. Silk, Janet R.D. King, Michelle Phillips, Richard A. 2016-07 text http://nora.nerc.ac.uk/id/eprint/513990/ https://nora.nerc.ac.uk/id/eprint/513990/1/Carneiro%20et%20al%20-%20Consistency%20in%20migration%20strategies.pdf https://doi.org/10.3354/meps11781 en eng Inter-Research https://nora.nerc.ac.uk/id/eprint/513990/1/Carneiro%20et%20al%20-%20Consistency%20in%20migration%20strategies.pdf Carneiro, Ana P.B.; Manica, Adrea; Clay, Thomas A. orcid:0000-0002-0644-6105 Silk, Janet R.D.; King, Michelle; Phillips, Richard A. 2016 Consistency in migration strategies and habitat preferences of brown skuas over two winters, a decade apart. Marine Ecology Progress Series, 553. 267-281. https://doi.org/10.3354/meps11781 <https://doi.org/10.3354/meps11781> Publication - Article PeerReviewed 2016 ftnerc https://doi.org/10.3354/meps11781 2023-02-04T19:43:14Z At-sea movements and activity patterns of brown skuas Stercorarius antarcticus lonnbergi from South Georgia were analysed in 2 winters, a decade apart, to examine the degree of consistency in migration strategies and habitat preferences during the non-breeding and pre-laying exodus periods. Oceanographic habitat preferences of tracked skuas were determined using a robust model accounting for availability. At the population level, brown skuas were broadly consistent in their choice of wintering areas and habitat preferences, although the distribution extended farther east in 2012 than in 2002. Skuas preferred areas associated with static oceanography (bathymetric features) both during the non-breeding and pre-laying periods, which may explain the consistency between years in habitat use. There was no significant effect of year on departure dates from South Georgia, but birds returned earlier to the colony in 2002. Migration schedules varied according to breeding status, with failed birds departing earlier than birds that bred successfully. Although failed birds travelled farther from the colony, there was little variation in dates of return. In general the timing of movements was similar between sexes, but females were more likely than males to engage in a pre-laying exodus. Brown skuas spent a much higher proportion of time sitting on the water than other seabirds during both the non-breeding and pre-laying exodus periods, and the number of flight bouts per day was surprisingly low. The selection of static features by brown skuas may indicate that skuas may have less flexibility to track environmental changes than species that use dynamic cues. Article in Journal/Newspaper Antarc* antarcticus Stercorarius antarcticus Natural Environment Research Council: NERC Open Research Archive Marine Ecology Progress Series 553 267 281 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
description |
At-sea movements and activity patterns of brown skuas Stercorarius antarcticus lonnbergi from South Georgia were analysed in 2 winters, a decade apart, to examine the degree of consistency in migration strategies and habitat preferences during the non-breeding and pre-laying exodus periods. Oceanographic habitat preferences of tracked skuas were determined using a robust model accounting for availability. At the population level, brown skuas were broadly consistent in their choice of wintering areas and habitat preferences, although the distribution extended farther east in 2012 than in 2002. Skuas preferred areas associated with static oceanography (bathymetric features) both during the non-breeding and pre-laying periods, which may explain the consistency between years in habitat use. There was no significant effect of year on departure dates from South Georgia, but birds returned earlier to the colony in 2002. Migration schedules varied according to breeding status, with failed birds departing earlier than birds that bred successfully. Although failed birds travelled farther from the colony, there was little variation in dates of return. In general the timing of movements was similar between sexes, but females were more likely than males to engage in a pre-laying exodus. Brown skuas spent a much higher proportion of time sitting on the water than other seabirds during both the non-breeding and pre-laying exodus periods, and the number of flight bouts per day was surprisingly low. The selection of static features by brown skuas may indicate that skuas may have less flexibility to track environmental changes than species that use dynamic cues. |
format |
Article in Journal/Newspaper |
author |
Carneiro, Ana P.B. Manica, Adrea Clay, Thomas A. Silk, Janet R.D. King, Michelle Phillips, Richard A. |
spellingShingle |
Carneiro, Ana P.B. Manica, Adrea Clay, Thomas A. Silk, Janet R.D. King, Michelle Phillips, Richard A. Consistency in migration strategies and habitat preferences of brown skuas over two winters, a decade apart |
author_facet |
Carneiro, Ana P.B. Manica, Adrea Clay, Thomas A. Silk, Janet R.D. King, Michelle Phillips, Richard A. |
author_sort |
Carneiro, Ana P.B. |
title |
Consistency in migration strategies and habitat preferences of brown skuas over two winters, a decade apart |
title_short |
Consistency in migration strategies and habitat preferences of brown skuas over two winters, a decade apart |
title_full |
Consistency in migration strategies and habitat preferences of brown skuas over two winters, a decade apart |
title_fullStr |
Consistency in migration strategies and habitat preferences of brown skuas over two winters, a decade apart |
title_full_unstemmed |
Consistency in migration strategies and habitat preferences of brown skuas over two winters, a decade apart |
title_sort |
consistency in migration strategies and habitat preferences of brown skuas over two winters, a decade apart |
publisher |
Inter-Research |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/513990/ https://nora.nerc.ac.uk/id/eprint/513990/1/Carneiro%20et%20al%20-%20Consistency%20in%20migration%20strategies.pdf https://doi.org/10.3354/meps11781 |
genre |
Antarc* antarcticus Stercorarius antarcticus |
genre_facet |
Antarc* antarcticus Stercorarius antarcticus |
op_relation |
https://nora.nerc.ac.uk/id/eprint/513990/1/Carneiro%20et%20al%20-%20Consistency%20in%20migration%20strategies.pdf Carneiro, Ana P.B.; Manica, Adrea; Clay, Thomas A. orcid:0000-0002-0644-6105 Silk, Janet R.D.; King, Michelle; Phillips, Richard A. 2016 Consistency in migration strategies and habitat preferences of brown skuas over two winters, a decade apart. Marine Ecology Progress Series, 553. 267-281. https://doi.org/10.3354/meps11781 <https://doi.org/10.3354/meps11781> |
op_doi |
https://doi.org/10.3354/meps11781 |
container_title |
Marine Ecology Progress Series |
container_volume |
553 |
container_start_page |
267 |
op_container_end_page |
281 |
_version_ |
1766251536952852480 |