Stopover ecology of migratory Sedge Warblers (Acrocephalus schoenobaenus) at Eilat, Israel
2004
Yosef, Reuven | Chernetsov, Nikita
Migrating Sedge Warblers Acrocephalusschoenobaenus were captured in Eilat, Israel, during their spring andautumn migration. Data on spring and autumn body masses, their interannualvariation and the pattern of fuel accumulation were analysed. Body mass andbody condition index significantly varied between the years of study in springbut not in autumn. This may be due to birds over-flying the area, but loopmigration might also be involved. Sedge Warblers gain mass in Eilat, both inspring and in autumn. Birds in poor initial condition and those stopping overfor a longer period gained more body mass faster. In spring, but not in autumn,the progress of the season was another important factor: late birds gained morebody mass. The average rate of body mass gain was 0.179g day–1 ± SE= 0.026. This suggests that Eilat is an important staging area for SedgeWarblers in spring and to a smaller extent in autumn.Ostrich 2004, 75(1&2): 52–56
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