DENSITY-DEPENDENT MASS GAIN BY WILSON'S WARBLERS DURING STOPOVER
作者： Linda S. DeLay , Deborah M. Finch , Jeffrey F. Kelly
DOI: 10.1642/0004-8038(2002)119[0210:DDMGBW]2.0.CO;2
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摘要: Abstract The 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 (i.e. capture rate), and arthropod autumn migration. We found amount declined as a function their abundance. no relationship between Abundance was positively associated with These patterns are consistent the hypothesis gain is density dependent. They also suggest respond numerically to food site. This numerical response may override any functional thereby account for lack change
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