La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Prey Choice by Declining Atlantic Flyway Semipalmated Sandpipers (Calidris pusilla) at a Major Wintering Area in Brazil (2019)
Auteurs :	Carlos D. Santos, Auteur ; Thalita M. S. Rocha, Auteur ; Alexssander W. B. Nascimento, Auteur ; Veronica Oliveira, Auteur ; Carlos Martinez, Auteur
Type de document :	Article
Dans :	Waterbirds (42(2) June, 2019)
Article en page(s) :	198-204
Résumé :	Eastern populations of Semipalmated Sandpipers (Calidris pusilla) have declined severely in recent decades, particularly at wintering grounds in northern South America, where about 80% of the population was lost since the 1980s. This study investigates prey choice of Semipalmated Sandpipers at two sites in major wintering grounds on the coast of Maranhao, northeast Brazil. Prey availability estimated from intertidal sediment samples was compared with bird diet reconstructed from prey remains in droppings. Birds (flocks of 804/0 birds) fed almost exclusively on the polychaete Laeonereis culven: (present in all droppings at both sites; >= 97% of total setae found in droppings), the most abundant invertebrate in the intertidal sediments overall, but they avoided the smallest sizes despite abundance in sediments and avoided numerous other species. Setae from two other polychaetes were found in droppings (Glyeludes multidens, 53% of droppings; Hermondura trieuspis, 47% of droppings), but these represented

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