Moving polewards in winter: a recent change in the migratory strategy of a pelagic seabird?
Background: During the non-breeding period, many birds migrate to milder areas, found closer to the equator than their breeding sites. Opposite movements are very rare. In the Southern Ocean, the abundance of 13C declines markedly with more southern latitude, providing a characteristic 13C isoscape....
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.354.9310 2023-05-15T13:52:43+02:00 Moving polewards in winter: a recent change in the migratory strategy of a pelagic seabird? Petra Quillfeldt Juan F Masello Rona Ar Mcgill Mark Adams Robert W Furness The Pennsylvania State University CiteSeerX Archives application/zip http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.354.9310 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.354.9310 Metadata may be used without restrictions as long as the oai identifier remains attached to it. ftp://ftp.ncbi.nlm.nih.gov/pub/pmc/09/d4/Front_Zool_2010_May_19_7_15.tar.gz text ftciteseerx 2016-01-08T00:31:33Z Background: During the non-breeding period, many birds migrate to milder areas, found closer to the equator than their breeding sites. Opposite movements are very rare. In the Southern Ocean, the abundance of 13C declines markedly with more southern latitude, providing a characteristic 13C isoscape. This can be used as a tracer for the movement of seabirds between breeding and inter-breeding areas, by comparing stable isotope ratios of feathers grown at different times of the year. Results: We studied seasonal movements of Thin-billed prions (Aves, Procellariiformes), breeding at the Subantarctic Falkland/Malvinas Islands, compared with those of Wilson's storm-petrels breeding in the Antarctic South Shetland Islands. The two species showed opposite migratory movements. While Wilson's storm-petrels moved to warmer waters north of the Drake Passage in winter, Thin-billed prions showed a reversed movement towards more polar waters. Carbon stable isotope ratios in recent and historical feathers indicated that poleward winter movements of Thin-billed prions were less common historically (45 % in 1913-1915), and have only recently become dominant (92 % in 2003-2005), apparently in response to warming sea temperatures. Conclusions: This study shows that pelagic seabirds can rapidly change migration strategies within populations, including migration towards more poleward waters in winter. Text Antarc* Antarctic Drake Passage South Shetland Islands Southern Ocean Unknown Antarctic Drake Passage South Shetland Islands Southern Ocean The Antarctic |
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English |
description |
Background: During the non-breeding period, many birds migrate to milder areas, found closer to the equator than their breeding sites. Opposite movements are very rare. In the Southern Ocean, the abundance of 13C declines markedly with more southern latitude, providing a characteristic 13C isoscape. This can be used as a tracer for the movement of seabirds between breeding and inter-breeding areas, by comparing stable isotope ratios of feathers grown at different times of the year. Results: We studied seasonal movements of Thin-billed prions (Aves, Procellariiformes), breeding at the Subantarctic Falkland/Malvinas Islands, compared with those of Wilson's storm-petrels breeding in the Antarctic South Shetland Islands. The two species showed opposite migratory movements. While Wilson's storm-petrels moved to warmer waters north of the Drake Passage in winter, Thin-billed prions showed a reversed movement towards more polar waters. Carbon stable isotope ratios in recent and historical feathers indicated that poleward winter movements of Thin-billed prions were less common historically (45 % in 1913-1915), and have only recently become dominant (92 % in 2003-2005), apparently in response to warming sea temperatures. Conclusions: This study shows that pelagic seabirds can rapidly change migration strategies within populations, including migration towards more poleward waters in winter. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Petra Quillfeldt Juan F Masello Rona Ar Mcgill Mark Adams Robert W Furness |
spellingShingle |
Petra Quillfeldt Juan F Masello Rona Ar Mcgill Mark Adams Robert W Furness Moving polewards in winter: a recent change in the migratory strategy of a pelagic seabird? |
author_facet |
Petra Quillfeldt Juan F Masello Rona Ar Mcgill Mark Adams Robert W Furness |
author_sort |
Petra Quillfeldt |
title |
Moving polewards in winter: a recent change in the migratory strategy of a pelagic seabird? |
title_short |
Moving polewards in winter: a recent change in the migratory strategy of a pelagic seabird? |
title_full |
Moving polewards in winter: a recent change in the migratory strategy of a pelagic seabird? |
title_fullStr |
Moving polewards in winter: a recent change in the migratory strategy of a pelagic seabird? |
title_full_unstemmed |
Moving polewards in winter: a recent change in the migratory strategy of a pelagic seabird? |
title_sort |
moving polewards in winter: a recent change in the migratory strategy of a pelagic seabird? |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.354.9310 |
geographic |
Antarctic Drake Passage South Shetland Islands Southern Ocean The Antarctic |
geographic_facet |
Antarctic Drake Passage South Shetland Islands Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Drake Passage South Shetland Islands Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage South Shetland Islands Southern Ocean |
op_source |
ftp://ftp.ncbi.nlm.nih.gov/pub/pmc/09/d4/Front_Zool_2010_May_19_7_15.tar.gz |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.354.9310 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766257185709359104 |