Underuse of stopover site by migratory swans
Many migratory birds use a chain of stopover sites to fuel their migration. Under time-minimizing migration, fuelling time and giving-up density at stopovers are predicted to depend on fuelling conditions. Fluctuations in food accessibility likely lead to changes in fuelling conditions, which should...
Published in: | Journal of Ornithology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2013
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Online Access: | https://pure.knaw.nl/portal/en/publications/1baa3d7f-08ce-4e34-b492-615f400b4598 https://doi.org/10.1007/s10336-013-0934-7 https://hdl.handle.net/20.500.11755/1baa3d7f-08ce-4e34-b492-615f400b4598 https://pure.knaw.nl/ws/files/467112/Nolet_ea_5400IP.pdf https://pure.knaw.nl/ws/files/467113/5400_NoletOnline.pdf http://mda.vliz.be/mda/directlink.php?fid=VLIZ_00000333_1377002275 |
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ftknawnlpublic:oai:pure.knaw.nl:publications/1baa3d7f-08ce-4e34-b492-615f400b4598 2024-09-15T18:03:25+00:00 Underuse of stopover site by migratory swans Nolet, B.A. Gyimesi, A. 2013 application/pdf https://pure.knaw.nl/portal/en/publications/1baa3d7f-08ce-4e34-b492-615f400b4598 https://doi.org/10.1007/s10336-013-0934-7 https://hdl.handle.net/20.500.11755/1baa3d7f-08ce-4e34-b492-615f400b4598 https://pure.knaw.nl/ws/files/467112/Nolet_ea_5400IP.pdf https://pure.knaw.nl/ws/files/467113/5400_NoletOnline.pdf http://mda.vliz.be/mda/directlink.php?fid=VLIZ_00000333_1377002275 eng eng https://pure.knaw.nl/portal/en/publications/1baa3d7f-08ce-4e34-b492-615f400b4598 info:eu-repo/semantics/openAccess Nolet , B A & Gyimesi , A 2013 , ' Underuse of stopover site by migratory swans ' , Journal of Ornithology , vol. 154 , no. 3 , pp. 695-703 . https://doi.org/10.1007/s10336-013-0934-7 national article 2013 ftknawnlpublic https://doi.org/10.1007/s10336-013-0934-720.500.11755/1baa3d7f-08ce-4e34-b492-615f400b4598 2024-07-22T23:43:54Z Many migratory birds use a chain of stopover sites to fuel their migration. Under time-minimizing migration, fuelling time and giving-up density at stopovers are predicted to depend on fuelling conditions. Fluctuations in food accessibility likely lead to changes in fuelling conditions, which should in turn be reflected in fuelling time and giving-up density. During their migration, Bewick’s Swans Cygnus columbianus bewickii refuel on belowground tubers of Fennel Pondweed Potamogeton pectinatus in shallow lakes. We studied giving-up density and stop-over use (expressed in bird-days) of Bewick's Swans at an autumn stopover site (Lauwersmeer, The Netherlands) during 1995–2008, as dependent on local environmental conditions. High water levels were hypothesized to restrict access to tuber stocks. High water levels at the stopover site were predicted to lead to higher giving-up densities and less bird-days spent at the stopover. Annual variation in giving-up densities and number of bird-days was strongly associated with year-to-year differences in initial tuber biomass density and number of days with high water levels. As predicted, giving-up density increased and bird-days decreased with the number of days with high water level. We conclude that, in line with time-minimizing migration, changes in fuelling conditions may lead to underuse of a stopover site. Underuse of stopovers by migratory birds has been reported before but only in the sense that more food was left at stopover sites than at wintering sites. In contrast, in our case, dealing with a given stopover site, more food is left behind in some years than in other years. Many migratory birds use a chain of stopover sites to fuel their migration. Under time-minimizing migration, fuelling time and giving-up density at stopovers are predicted to depend on fuelling conditions. Fluctuations in food accessibility likely lead to changes in fuelling conditions, which should in turn be reflected in fuelling time and giving-up density. During their migration, ... Article in Journal/Newspaper Cygnus columbianus Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW) Journal of Ornithology 154 3 695 703 |
institution |
Open Polar |
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Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW) |
op_collection_id |
ftknawnlpublic |
language |
English |
topic |
national |
spellingShingle |
national Nolet, B.A. Gyimesi, A. Underuse of stopover site by migratory swans |
topic_facet |
national |
description |
Many migratory birds use a chain of stopover sites to fuel their migration. Under time-minimizing migration, fuelling time and giving-up density at stopovers are predicted to depend on fuelling conditions. Fluctuations in food accessibility likely lead to changes in fuelling conditions, which should in turn be reflected in fuelling time and giving-up density. During their migration, Bewick’s Swans Cygnus columbianus bewickii refuel on belowground tubers of Fennel Pondweed Potamogeton pectinatus in shallow lakes. We studied giving-up density and stop-over use (expressed in bird-days) of Bewick's Swans at an autumn stopover site (Lauwersmeer, The Netherlands) during 1995–2008, as dependent on local environmental conditions. High water levels were hypothesized to restrict access to tuber stocks. High water levels at the stopover site were predicted to lead to higher giving-up densities and less bird-days spent at the stopover. Annual variation in giving-up densities and number of bird-days was strongly associated with year-to-year differences in initial tuber biomass density and number of days with high water levels. As predicted, giving-up density increased and bird-days decreased with the number of days with high water level. We conclude that, in line with time-minimizing migration, changes in fuelling conditions may lead to underuse of a stopover site. Underuse of stopovers by migratory birds has been reported before but only in the sense that more food was left at stopover sites than at wintering sites. In contrast, in our case, dealing with a given stopover site, more food is left behind in some years than in other years. Many migratory birds use a chain of stopover sites to fuel their migration. Under time-minimizing migration, fuelling time and giving-up density at stopovers are predicted to depend on fuelling conditions. Fluctuations in food accessibility likely lead to changes in fuelling conditions, which should in turn be reflected in fuelling time and giving-up density. During their migration, ... |
format |
Article in Journal/Newspaper |
author |
Nolet, B.A. Gyimesi, A. |
author_facet |
Nolet, B.A. Gyimesi, A. |
author_sort |
Nolet, B.A. |
title |
Underuse of stopover site by migratory swans |
title_short |
Underuse of stopover site by migratory swans |
title_full |
Underuse of stopover site by migratory swans |
title_fullStr |
Underuse of stopover site by migratory swans |
title_full_unstemmed |
Underuse of stopover site by migratory swans |
title_sort |
underuse of stopover site by migratory swans |
publishDate |
2013 |
url |
https://pure.knaw.nl/portal/en/publications/1baa3d7f-08ce-4e34-b492-615f400b4598 https://doi.org/10.1007/s10336-013-0934-7 https://hdl.handle.net/20.500.11755/1baa3d7f-08ce-4e34-b492-615f400b4598 https://pure.knaw.nl/ws/files/467112/Nolet_ea_5400IP.pdf https://pure.knaw.nl/ws/files/467113/5400_NoletOnline.pdf http://mda.vliz.be/mda/directlink.php?fid=VLIZ_00000333_1377002275 |
genre |
Cygnus columbianus |
genre_facet |
Cygnus columbianus |
op_source |
Nolet , B A & Gyimesi , A 2013 , ' Underuse of stopover site by migratory swans ' , Journal of Ornithology , vol. 154 , no. 3 , pp. 695-703 . https://doi.org/10.1007/s10336-013-0934-7 |
op_relation |
https://pure.knaw.nl/portal/en/publications/1baa3d7f-08ce-4e34-b492-615f400b4598 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s10336-013-0934-720.500.11755/1baa3d7f-08ce-4e34-b492-615f400b4598 |
container_title |
Journal of Ornithology |
container_volume |
154 |
container_issue |
3 |
container_start_page |
695 |
op_container_end_page |
703 |
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1810440915954696192 |