| Population-scale drivers of individual arrival times in migratory birds. | |
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MedLine Citation:
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PMID: 16922847 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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1. In migratory species, early arrival on the breeding grounds can often enhance breeding success. Timing of spring migration is therefore a key process that is likely to be influenced both by factors specific to individuals, such as the quality of winter and breeding locations and the distance between them, and by annual variation in weather conditions before and during migration. 2. The Icelandic black-tailed godwit Limosa limosa islandica population is currently increasing and, throughout Iceland, is expanding into poorer quality breeding areas. Using a unique data set of arrival times in Iceland in different years for individuals of known breeding and wintering locations, we show that individuals breeding in lower quality, recently occupied and colder areas arrive later than those from traditionally occupied areas. The population is also expanding into new wintering areas, and males from traditionally occupied winter sites also arrive earlier than those occupying novel sites. 3. Annual variation in timing of migration of individuals is influenced by large-scale weather systems (the North Atlantic Oscillation), but between-individual variation is a stronger predictor of arrival time than the NAO. Distance between winter and breeding sites does not influence arrival times. 4. Annual variation in timing of migration is therefore influenced by climatic factors, but the pattern of individual arrival is primarily related to breeding and winter habitat quality. These habitat effects on arrival patterns are likely to operate through variation in individual condition and local-scale density-dependent processes. Timing of migration thus appears to be a key component of the intricate relationship between wintering and breeding grounds in this migratory system. |
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Authors:
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Tómas G Gunnarsson; Jennifer A Gill; Philip W Atkinson; Guillaume Gélinaud; Peter M Potts; Ruth E Croger; Gudmundur A Gudmundsson; Graham F Appleton; William J Sutherland |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of animal ecology Volume: 75 ISSN: 0021-8790 ISO Abbreviation: J Anim Ecol Publication Date: 2006 Sep |
Date Detail:
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Created Date: 2006-08-22 Completed Date: 2008-02-12 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0376574 Medline TA: J Anim Ecol Country: England |
Other Details:
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Languages: eng Pagination: 1119-27 Citation Subset: IM |
Affiliation:
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Centre for Ecology, Evolution and Conservation, School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, UK. tomas@hi.is |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animal Migration
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physiology* Animals Breeding Charadriiformes / physiology* Ecosystem Female Geography Iceland Male Models, Biological* Population Density Seasons Temperature Time Factors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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