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Wöss, M. & M. Zohmann

Bestandsaufnahme beim Alpenschneehuhn Lagopus mutus in einem Teilgebiet der Nationalparkregion Nockberge, Österreich.

2004

101

209–218

Key words
(von 1994 bis 2006 vergeben)

Lagopus mutus, national park area, Nockberge (Austrian Alps), population density, territories, grouse, displaying activity

Nationalpark, Bestandesdichte, Reviere, Balz, Gesangsaktivität, Tagesperiodik, Verhalten

Schlagwort_Vogelart
(wissenschaftlich)

Lagopus mutus

Schlagwort_Vogelart
(deutsch)

Alpenschneehuhn

Kärntner Nockberge, Gurktaler Alpen, Österreich

deutsch

Abhandlung

Estimation of population density and distribution of Ptarmigan Lagopus mutus in the «Nockberge» national park, Austrian Alps. – In a study area of 6.84 km2 we carried out counts of displaying males in springtime from 31 May to 1 July 2003. The topographical situation made it necessary to set observation posts at distances of 150 to 700 m. Overall 37 territorial cocks could be observed plus some Ptarmigan groups who visited the occupied territories irregularly. Therefore the minimum population density was estimated to be at least 5.4 territorial cocks/km2. The distances between displaying cocks were 200 to 700 m. The intensity of calls was constantly high within the observation period, highest between 4.01 and 4.30 a.m. but could last from 3.30 to 5.55 a.m. The last two counts (28 June, 1 July) showed a significiantly shorter duration of territorial behaviour than the previous ones (but within the displaying time more calls). Maybe this indicated that the day of hatching was near. After those two days no further calls occurred. Four days later (5 July) a hen with 5–8 chicks was observed. On average the cocks produced 6.3 calls per morning activity period.