Korner, P., A. Sauter & L. Jenni
(* = Kurzbeitrag)
Raum-zeitliches Verhalten von neun Stockenten Anas platyrhynchos im Winter.
(von 1994 bis 2006 vergeben)
Aufenthaltsort, Bewegungsmelder, Besenderung, GPS, konstante Verhalten, Interindividuelle Variabilität, Gewässernutzung, Raumgrösse, Pendelflüge, Ruhe- und Aktivitätsphase,
Sempachersee, Wauwilermoos, Oberkirch, Luzern, Schweiz
Spatio-temporal behaviour of nine individual Mallards Anas platyrhynchos in winter. Nine wintering Mallards were equipped with GPS tags with accelerometer. The location was registered every 30 min, and from the accelerometer data the duck was categorized as being active vs. inactive every two to five minutes. We observed large differences in the behaviour among individuals, e.g. in the local movements within the study perimeter of about 20 × 20 km. Two individuals were regular commuters. Other individuals showed a preference for some sites for short time periods before they switched to new sites. The use of apparently preferred sites for some days may reflect the depletion of a food source, e.g. on a field, by a flock of ducks. One duck was observed to steadily move up a small river between 4 and 17 h, possibly feeding. The activity level of the ducks, though showing a general daily pattern with peaks during twilight, varied greatly within and between individuals. These observations emphasise the well-known flexibility of this generalist species, and some observations may reflect the personality of the individuals. Finally, a pair was observed, tightly following each other except for a few periods of separation during the night. In one such event, the male moved around for several hours, with flights in different directions, apparently in search of the female, until the pair finally reunited.
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