Naslov
Birds of a feather winter together: migratory connectivity in the Reed Warbler Acrocephalus scirpaceus

Autori
Procházka, Petr ; Hobson, Keith A. ; Karcza, Zsolt ; Kralj, Jelena

Izvornik
Journal of Ornithology (0021-8375) 149 (2008), 2; 141-150

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Acrocephalus scirpaceus; Migratory connectivity; Migratory divide; Ringing recoveries; Stable isotopes

Sažetak
To investigate migratory connectivity in the Reed Warbler Acrocephalus scirpaceus, we analysed (1) all available sub-Saharan ringing recoveries and (2) stable isotopes in feathers grown in Africa sampled at 17 European breeding sites across a migratory divide. A cluster analysis of ringing recoveries showed remarkable connectivity between breeding and non-breeding grounds. Two main clusters represented populations taking the two main migratory routes [southwesterly (SW) and southeasterly (SE)]. Stable isotope analysis confirmed the separation of wintering areas of SW- and SE-migrating populations. Higher δ 15N values in feathers of SE-migrating birds indicated that they occupied more xeric biome types. Values of δ 13C that did not differ significantly among populations were higher than those from feathers of known European origin and indicated a C4 biome. Three populations with an unknown migratory direction were assigned to the SE-migrating populations on the basis of δ 15N values.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA