Skip to Main Content
Density-dependent mass gain by Wilson's Warblers during stopoverAuthor(s): Jeffrey F. Kelly; Linda S. DeLay; Deborah M. Finch
Source: The Auk. 119(1): 210-213.
Publication Series: Miscellaneous Publication
PDF: Download Publication (65 B)
DescriptionThe need restore energetic reserves at stopover sites constrains avian migration ecology. To describe that constraint, we examined relationships among mass gained by Wilson's Warblers (Wilsonia pusilla) during stopover, abundance of Wilson's Warblers (i.e. capture rate), and arthropod abundance during autumn migration. We found that amount of mass gained by Wilson's Warblers during stopover declined as a function of their abundance. We found no relationship between mass gained by Wilson's Warblers and arthropod abundance. Abundance of Wilson's Warblers was positively associated with arthropod abundance. These patterns are consistent with the hypothesis that mass gain during stopover is density dependent. They also suggest that Wilson's Warblers respond numerically to abundance of food at that stopover site. This numerical response may override any functional response and thereby account for lack of a relationship between mass change and arthropod abundance.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationKelly, Jeffrey F.; DeLay, Linda S.; Finch, Deborah M. 2002. Density-dependent mass gain by Wilson''s Warblers during stopover. The Auk. 119(1): 210-213.
KeywordsWilson's Warblers, Wilsonia pusilla, mass gain, stopover sites, avian migration ecology
- Stopover ecology and habitat use of migratory Wilson's Warblers
- Insights into Wilson's Warbler migration from analyses of hydrogen stable-isotope ratios
- Arthropods of native and exotic vegetation and their association with willow flycatchers and Wilson's warblers
XML: View XML