Morphological variation of European Reed Warblers across a migratory divide. (CROSBI ID 509665)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Procházka, Petr ; Álvarez, Javier, R. ; Scebba, Sergio ; Kralj, Jelena ; Németh, Ákos
engleski
Morphological variation of European Reed Warblers across a migratory divide.
A migratory divide is a zone of contact between two parapatric populations migrating to two disparate directions. Ringing recoveries of Reed Warblers Acrocephalus scirpaceus suggest that such a migratory divide exists in central Europe separating populations using SW and SE migratory directions when heading for their winter quarters in Africa. We preliminarily studied morphological variation of Reed Warblers at 12 study sites stretching from Spain and Wales in the west to Lithuania in the north and Romania and Bulgaria in the east. Only data for adult breeding birds measured in 2003 and 2004 were included in our analyses. Body size (expressed as an index from PCA of three body measurements) increased with latitude and longitude. Even a stronger correlation of body size with both longitude and latitude was found for breeding populations with known SW migratory directions, whereas no such a trend was apparent for populations with SE migratory direction. Hungarian Reed Warblers differed from other populations by longer foot spans. The geographical patterns of Reed Warbler morphology will be discussed in light of the species’ migratory divide and general eco-geographical gradients in birds (Bergmann’ s and Seebohm’ s rules).
Reed Warbler Acrocephalus scirpaceus; migratory divide; morphological variation
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Podaci o prilogu
45-46-x.
2005.
objavljeno
Podaci o matičnoj publikaciji
Podaci o skupu
ESF Final Conference ‘ ; Migration in the life-history of birds’ ;
poster
16.02.2005-20.02.2005
Wilhelmshaven, Njemačka