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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Factors affecting capture success in mist-netting of Passerine birds
Auteurs :	Harald Dorsch, Auteur
Type de document :	Article
Dans :	Vogelwelt (Die) (119(2) 1998)
Article en page(s) :	91-104
Résumé :	Factors affecting the capture success in mist-netting of Passerine birds have been analysed using data from 305 standardised mist-netting sessions during the period 1982-1992 at the Rohrbach Ponds, Muldental district, Saxony. The following conclusions were reached: The capture success is highest during the first hours of netting (independently of time of day), it decreases in later hours and reaches a constant level of trapped birds per hour only after about 15 hours of constant netting; diurnal pattern of capture success varies strongly and shows distinct patterns for different species; capture success is clearly influenced by the time that elapsed since the previous netting session; only after a break of 6 days or more is this impact no longer detectable; the starting time (daytime) of the netting activity does not influence the capture rate, if the netting session lasts 24 hours or longer; if standardized netting sessions last 24 hours or longer, the impact of weather conditions on the results will average out to a large extent. Based on these results, recommendations are made for long-term mist-netting programmes for monitoring purposes ("Constant Effort Programmes"). Proposals for a proper set-up of such long-term schemes and the analysis of results in particular with regard to population monitoring of Passerine birds are given.

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