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A Puzzling Migrator...
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Lindström, ÅkeLund University,Lunds universitet,Biodiversitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Biodiversity,Department of Biology,Faculty of Science
(author)
A Puzzling Migratory Detour: Are Fueling Conditions In Alaska Driving The Movement Of Juvenile Sharp-Tailed Sandpipers?
- Article/chapterEnglish2011
Publisher, publication year, extent ...
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Oxford University Press (OUP),2011
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LIBRIS-ID:oai:lup.lub.lu.se:30800c82-13df-41d5-861c-7def3dae60b8
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https://lup.lub.lu.se/record/1926092URI
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https://doi.org/10.1525/cond.2011.090171DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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Making a detour can be advantageous to a migrating bird if fuel-deposition rates at stopover sites along the detour are considerably higher than at stopover sites along a more direct route. One example of an extensive migratory detour is that of the Sharp-tailed Sandpiper (Calidris acuminata), of which large numbers of juveniles are found during fall migration in western Alaska. These birds take a detour of 1500-3400 km from the most direct route between their natal range in northeastern Siberia and nonbreeding areas in Australia. We studied the autumnal fueling rates and fuel loads of 357 Sharp-tailed Sandpipers captured in western Alaska. In early September the birds increased in mass at a rate of only 0.5% of lean body mass day(-1). Later in September, the rate of mass increase was about 6% of lean body mass day(-1), among the highest values found among similar-sized shorebirds around the world. Some individuals more than doubled their body mass because of fuel deposition, allowing non-stop flight of between 7100 and 9800 km, presumably including a trans-oceanic flight to the southern hemisphere. Our observations indicated that predator attacks were rare in our study area, adding another potential benefit of the detour. We conclude that the most likely reason for the Alaskan detour is that it allows juvenile Sharp-tailed Sand-pipers to put on large fuel stores at exceptionally high rates.
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Added entries (persons, corporate bodies, meetings, titles ...)
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Gill, Robert E., Jr.
(author)
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Jamieson, Sarah E.
(author)
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McCaffery, Brian
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Wennerberg, Liv
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Wikelski, Martin
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Klaassen, Marcel
(author)
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BiodiversitetBiologiska institutionen
(creator_code:org_t)
Related titles
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In:The Condor: ornithological applications: Oxford University Press (OUP)113:1, s. 129-1390010-5422
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In:The Condor: Oxford University Press (OUP)113:1, s. 129-1391938-5129
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