engleski

Intraspecific variation in the wing shape and genetic differentiation of Reed Warblers Acrocephalus scirpaceus in Croatia

Wing shape plays a major role in determining the aerodynamics and performance of avian flight. Intraspecific variation in wing shape reflects different migratory strategies or distances between breeding and wintering areas. Differences in the wing morphology and genotypes between coastal and inland breeding populations of the Reed Warbler in Croatia were studied. A total of 105 adult birds were measured, while blood samples were taken from 59 individuals. Results showed that the two geographically close populations of Reed Warblers differ in wing morphology, with birds from the inland population having more pointed and more slotted wings than those from the coastal population. Microsatellite allele frequencies showed slight but significant difference between the two populations (FST = 0.015), suggesting that gene flow between the two populations is partly restricted. Differences in wing morphology imply that the two populations use different migratory routes and/or winter in different areas. This migratory pattern may have consequently influenced contemporary genetic differentiation of the two populations.

Reed Warbler; Acrocephalus scirpaceus; wing morphology; migration; microsatellites; genetic diversity

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