La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Age-retated changes in the habitat use and behaviour of Mallard Anas platyrhynchos broods at artificially created takes in southern Britain.
Auteurs :	J. A. Robinson, Auteur ; L. G. Culzac, Auteur ; N. S. Aldridge, Auteur
Type de document :	Article
Dans :	Wildfowl (53 2002)
Article en page(s) :	107-118
Langues:	Anglais
Résumé :	Diurnal time-activity budgets of Mallard broods were measured at the Cotswold Water Park and The New Grounds, Slimbridge in spring and summer 2000. During the first month after hatching, ducklings spent 50% of their time feeding. Ducklings spent increasingly less time feeding, more time preening, and were more mobile, as they got older. In the first two weeks after hatching, ducklings spent over 80% of their foraging time chasing or picking insects from either the surface of the water or lake-side vegetation. Older ducklings spent more time dabbling for vegetative matter. In the first two weeks after hatching, ducklings used shorelines with varying amounts of terrestrial cover, but avoided those with large amounts of aquatic vegetation. In contrast, older ducklings tended to favour shorelines with a large proportion of aquatic vegetation. The potential link between habitat use and time-activity budgets is discussed.

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