Rythme hivernal d'alimentation du Courlis cendré (Numenius arquata) dans cinq grandes baies et estuaires français.

Alain Ponsero (1) , Patrick Triplet (2) , Christophe Aulert (3) , Emmanuel Joyeux (4) , Francis Meunier (4) , Rémy Perin (5)

1 Réserve Naturelle Nationale Baie St-Brieuc
2 Réserve Naturelle Nationale Baie de Somme
3 Réserve Naturelle Nationale de l'Estuaire de la Seine
4 Réserve Naturelle Nationale Baie de l'aiguillon
5 Réserve Naturelle Nationale Lilleau des Niges

Winter Foraging Activities of Curlew Numenius arquata in five large bays and estuaries in France. Foraging activities of Curlew have been studied in five sites considered as representative of overwintering sites for this species in France. The proportion of foraging birds is strongly linked to the tidal cycle, but is also affected by human activities. During ebbing tide, curlews actively forage on the mud flats, with a maximum intensity 4 and 9 hours after high tide. On the southern sites, where winter temperatures are milder, the maximum proportion of feeding animals decreases through out the winter, while it does not change in the Seine and Somme estuaries.

Mots clés: Courlis cendré; Alimentation; Hivernage; Baies et estuaires Eurasian Curlew; Feeding; Overwintering; Bays and estuaries

Domaines: Biodiversité et Ecologie

Alain Ponsero, Patrick Triplet, Christophe Aulert, Emmanuel Joyeux, Francis Meunier, et al.. Rythme hivernal d'alimentation du Courlis cendré (Numenius arquata) dans cinq grandes baies et estuaires français.. Alauda, 2008, 76 (2), pp.89-100. ⟨hal-00340836⟩