La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Winter diet of the goosander Mergus merganser on rivers in Southern Bavaria
Auteurs :	Josef Trauttmansdorff, Auteur ; Bernd-Ulrich Rudolph, Auteur
Type de document :	Article
Dans :	Ornithologischer Anzeiger (52(1-2) AUG 2013)
Article en page(s) :	19-27
Résumé :	The contents of 36 stomachs of goosanders originating from Bavaria were analyzed: 17 were legally shot on the river Bier and nine on the river Mangfall, ten were found with different causes of death in other water bodies in Southern Bavaria. The mean weight of the stomach contents was 32.4 g (2-178 g). The mean length of the prey was 8.4 cm (n = 405), only six fishes reached a length of more than 15 cm (maximum 20 cm). Fishes of 14 species of five families were found in the stomachs. In the 17 stomachs from the birds shot on the river Iller bullhead (Cottus gobio,

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