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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Distribution of the Lapwing Vanellus vanellus in Lkr. Aichach-Friedberg (Bavaria) and effects of weather and land use on the breeding success
Auteurs :	Uwe Bauer, Auteur
Type de document :	Article
Dans :	Ornithologischer Anzeiger (52(1-2) AUG 2013)
Article en page(s) :	59-85
Résumé :	In 2010 to 2012 the breeding population of the Lapwing Vanellus vanellus in the administrative district of Aichach-Friedberg (Bavaria) was systematically recorded. In three breeding populations and five breeding sites of only one or a single pairs there were registered in 2010 28-32 breeding pairs with 19 fledged chicks (with the except of the two breeding sites Lechhausener Moos and Donaumoos), in 2011 67-70 breeding pairs with 28 fledged chicks and in 2012 60 breeding pairs with 32 fledged chicks. The rate of reproduction was in 2010 0.66 fledged juv./bp (breeding pair), in 2011 0.4 fledged juv./bp and in 2011 0.53 fledged juv./bp. In all three years there couldn't be reached the necessary preservation rate of 0.8 fledged juv./bp. The reproduction was only sufficient in areas with a high share of meadows on fen mire soil or neighbouring to fallow fields. The varying weather conditions in the course of these three years entailed different rates of reproduction: the lowest reproduction rate was found out in the dry and warm spring 2011, the highest during the damp weather in 2010 and between these years laid the rate of producton in the warm spring of 2012, because it was dump enough since June. Small wood nearby the breeding sites had a negative effect at reproduction, in all probably caused by predation. All clutches, except of a sparsely covered meadow and two former loan pits, were in maize fields. A large part of clutches got lost there. 71 % of fledged chicks came form replacement clutches (in maize fields as well). The occupation of territories took place in second half of march and the beginning of April. The egg laying was between the end of March and the end of May. Most of the first clutches were laid in the first decade of April, replacement clutches in the fist and second decade of May. The breeding territories were left by the adults and juveniles during the course of July. Statements concerning to predation were made and detailed suggestions for protection were given.

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