La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Isotope forensic analysis does not support vagrancy for a Marbled Duck shot in Essex
Auteurs :	Tony Fox, Auteur ; Keith A. Hobson, Auteur ; Graham Ekins, Auteur ; Mark Grantham, Auteur ; Andy J. Green, Auteur
Type de document :	Article
Dans :	British Birds (103(8) AUG 2010)
Article en page(s) :	464-467
Résumé :	Analysis of the stable-hydrogen isotope content (delta D) of feathers taken from a first-winter Marbled Duck Marmaronetta angustirostris shot in Essex on Ist September 2007 showed little difference between juvenile feathers grown at the natal site and those grown during the post-juvenile moult. The delta D values of both groups of feather were similar to those expected if the bird had grown feathers in coastal areas of northern Europe, but differed significantly from those in feathers from known wild individuals taken from the species' nearest breeding areas, in Spain. These results suggest that the bird originated from outside of the normal breeding range of the species and was most likely to have been of captive origin.

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