Summary
The breeding site-tenacity of colour-ringed male Willow Warblers (Phylloscopus trochilus) was studied in an homogenous area of 154 ha, which is crossed by a heavily travelled road (45 000 cars per day). Close to the road (<200 m) the dispersal of the males is much higher than for birds further away. There is also some evidence that most of the near-to-the-road males are yearlings. The differences indicate that adjacent to the road the habitat is less favourable for the Willow Warbler and can be considered as marginal.
Zusammenfassung
Untersucht wurde die Brutortstreue von individuell fabrberingter Männchen des Fitis (Phylloscopus trochilus) in einem 154 ha großen Gebiet, das von einer Autobahn mit regem Verkehr (45 000 Fahrzeuge pro Tag) durchschnitten wird. In der Nähe der Autobahn (<200 m) zeigten die Reviermännchen eine viel größere Dismigration als die Revierinhaber in größerem Abstand von der Verkehrstraße. Auch gab es Hinweise, daß in der Nähe der Autobahn überwiegend einjährige Männchen die Reviere besetzten. Für den Fitis kann man Habitate entlang der Autobahn als marginal betrachten.
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Reijnen, R., Foppen, R. Effect of road traffic on the breeding site-tenacity of male Willow Warblers (Phylloscopus trochilus). J Ornithol 132, 291–295 (1991). https://doi.org/10.1007/BF01640537
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DOI: https://doi.org/10.1007/BF01640537