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Changes in the sex ratio of the Common Pochard Aythya ferina in Europe and North Africa

Kane Brides, Auteur ; Kevin A. Wood, Auteur ; Richard D. Hearn, Auteur ; Thijs PM Fijen, Auteur

Dans Wildfowl (67(67) 2017)

Assessments of the sex ratio among Common Pochard Aythya ferina flocks were undertaken in countries across Europe and into North Africa in January 2016, for comparison with results from surveys carried out over the same area in January 1989 and [...]

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