Food supply, Studies, Birds, recruitment, Migration, Distribution, Food, Diet, Energy, biofilms, Fatty acids, Food and nutrition, Animal migration, Fatty acid, microbial mats, Migratory birds, Food quality, Calidris pusilla, Semipalmated Sandpiper, acide gras, AGPI, baie de Fundy, Corophium volutator, PUFA, diet flexibility, biofilm, bécasseau semipalmé, sou...