期刊
JOURNAL OF ORNITHOLOGY
卷 150, 期 2, 页码 369-381出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10336-008-0357-z
关键词
Body mass; Eastern Africa; Migration strategy; Palearctic passerines
类别
资金
- Academic Exchange Service
- Ministry of Foreign Affairs
- Max-Planck Institute for Ornithology
Using the body mass estimates of 12 long-distance migrating Palearctic passerine species monitored at successive sites across the Eastern Africa flyway, we tested whether birds modulate their body mass according to specific seasonal demands across different geographic sectors. We compared body mass estimates across latitudinal distances and geographic sectors in Europe, the desert, Northeast Africa and East Africa. Our results show that, depending on the species and season considered, the average body mass increase or decrease is variable at and among different geographic sectors. By comparing the variation in body mass between different ecological sectors, we were able to show when and where migrants accumulate their migratory fuel reserves during migration.
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