Bibliothèque Tour du Valat

Se connecter

Mot de passe oublié ?
Pas encore inscrit ?

La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Détail

Notice ajoutée !

Notice ajoutée !

Lien vers la notice

Titre :	The come back of Ferruginous Duck Aythya nyroca as a breeding species at Dombes wetland (Eastern France) in the beginning of the 21st century. (2016)
Auteurs :	Benoit Castanier, Auteur ; Philippe Lebreton, Auteur
Type de document :	Article
Dans :	Alauda (84(4) 2016)
Article en page(s) :	281-320
Résumé :	The Ferruginous Duck shows a large breeding distribution in-the Palearctic, ranging from Northern Africa to China. However, its breeding and wintering numbers are considered to be declining (the species is labelled as "near threatened", IUCN Red List, 2006). In Western Europe, the species was not considered as a regular breeder in the second part of the 20th century. Thus, it was surprising to suspect the breeding of one or two pairs in 1998 in one of the private ponds of the Fondation Pierre Verots located in the Dombes wetland (France, Ain). Breeding was definitely proved in 2003 with successful breeding in 13 out of 14 years (among them during 10 years at the Fondation). In winter, the proximity between the Dombes wetland and the lakes of western Switzerland has to be taken into account: the wintering of the Ferruginous Duck on the Lake of Geneva is regular and even in exponential increasing in mid-January since the beginning of the 1990 years. In Dombes wetland a similar pattern occurred, particularly since the beginning of the 2000 years, but was weaker and less regular as in Switzerland. We assume that the occurrence of the species on the Lake of Geneva may explain the beginnings of the recent breeding in the Dombes wetland. These breedings were preceded by previous breeding evidence in northern and southern Switzerland in the 1990 decade and proved in 2014 in western Switzerland. Here we provide various data on phenology, biology, ecology and ethology of breeding Ferruginous Ducks in the Dombes wetland. Like two related species, Common Pochard and Tufted Duck, the Ferruginous Duck shows a rather low breeding success and a late breeding cycle whose ending may be affected by the hunting pressure in autumn. The climate warming should allow earlier laying but, then, meteorological events or mismatch with feeding resources may occur. As a consequence, late egg relaying leads to lower clutch size. But the optimal suitability the Ferruginous Duck finds on the ponds of the Fondation Pierre Verots explains why this species regularly and exclusively selects these sites in the present century in France. Besides a species-friendly management of the breeding sites, this duck can only survive there in so far as the hunters will strictly respect its status of protected species during the whole hunting season.

FAQ

Infos pratiques

Heures d'ouverture et contact

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...

Liens utiles

A-
A
A+