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Author Chernetsov, Nikita ♦ Bulyuk, Victor N. ♦ Ktitorov, Pavel
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Migratory Stopover ♦ Indian Flyway ♦ Arid Belt ♦ Palaearctic African Migrant ♦ Western Central Asia ♦ Intriguing Problem ♦ Low Average Fuel Store ♦ Desert Crossing ♦ Indian Migrant ♦ Nocturnal Passerine Migrant ♦ Fuel Load ♦ Ecological Barrier ♦ Migrate North ♦ Bird Migration Research ♦ Northwestern Edge ♦ Arid Area ♦ Migratory Strategy ♦ Large Fuel Store ♦ Palaearctic Indian Passerine Migrant ♦ Reed Warbler ♦ Near East ♦ Temperate-zone Land Bird ♦ Indian Subcontinent ♦ Serious Ecological Barrier ♦ African Migrant ♦ Garden Warbler Sylvia Borin ♦ Caspian Sea ♦ Large Body ♦ European Russia ♦ Red-breasted Flycatcher Ficedula Parva ♦ Reed Warbler Acrocephalus Dumetorum
Abstract We studied migratory stopovers of nocturnal passerine migrants migrating between the Urals and Siberia and the Near East and Africa (five species) and between European Russia and the Indian subcontinent (two species) in an oasis in the arid belt of the northwestern edge of western Central Asia. In autumn, fuel loads of Blyth’s Reed Warblers Acrocephalus dumetorum before their desert crossing were much greater than in Palaearctic–African migrants, which face a much narrower barrier, and also greater than in conspecifics captured during and after the desert crossing. However, another Indian migrant, the Red-breasted Flycatcher Ficedula parva, had low average fuel stores. In spring, Blyth’s Reed Warblers carried less fuel than in autumn, and less than African migrants such as Garden Warblers Sylvia borin in spring. This suggests that the arid belt of western Central Asia is a serious ecological barrier for Palaearctic–Indian passerine migrants in autumn, but much less of one in spring. Palaearctic–African migrants which make a detour around this barrier to the northwest and migrate north of the Caspian Sea do not need large fuel stores like those they deposit before crossing the Sahara. How birds cross ecological barriers is one of the most intriguing problems of bird migration research. Apart from large bodies of water, highlands and arid areas where no refuelling is possible may also be barriers for temperate-zone land birds. A number of studies have dealt with the migratory strategies of passerines crossing the Sahara
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study