Artículo

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Abstract:

The coastal grasslands of eastern Buenos Aires Province (Argentina) are used by Rufous-chested Dotterel (Charadrius modestus), Tawny-throated Dotterel (Oreopholus ruficollis), American Golden Plover (Pluvialis dominica) and Buff-breasted Sandpiper (Tryngites subruficollis). These species differ in size but all use visual pecking when feeding. The diet of each species was studied, measuring temporal variation in the abundance of invertebrates and dietary preferences of invertebrates. From March 1996 to January 1999, feces were collected of shorebirds on Medaland Ranch grasslands (Villa Gesell District, Buenos Aires Province, Argentina). Pitfall traps were used to capture surface-active invertebrates (from June 1996 until March 1998). All four bird species ate animal and plant items. In all cases, plant fragments rather than seeds dominated the plant fraction. Beetles comprised the dominant item in all four species of shorebirds. Earthworms were important for Patagonian shorebirds, but they were less frequent in the diets of Nearctic shorebirds. Relative use (proportion in the diet) of items differed by site and date. Numbers of captures were high in spring-summer and low in autumn-winter. All shorebird species preferred adult beetles. Rufous-chested Dotterel and Nearctic shorebirds also showed a preference for beetle larvae. In contrast, spiders and ants were avoided by all shorebird species. Diet information from Nearctic shorebirds at other sites in the Northern Hemisphere and in South America, confirmed that co-occurring species within a given region typically had similar diets, but that the same species in different regions showed low similarity. Dietary flexibility allows exploitation of variable resources and, as a consequence, is highly advantageous to shorebirds that migrate over long distances and use a variety of habitats.

Registro:

Documento: Artículo
Título:Food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season
Autor:Isacch, J.P.; Darrieu, C.A.; Martínez, M.M.
Filiación:Departamento de Biología, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, 7600 Mar del Plata, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Paseo del Bosque s/n, 1900 La Plata, Argentina
Idioma: Inglés
Palabras clave:Argentina; Diet; Dotterels; Feces; Grassland; Migratory shorebirds; Plovers; Prey abundance; Sandpipers; diet; food availability; migratory species; prey preference; wader; Argentina; Buenos Aires [Argentina]; South America; Western Hemisphere; World; Animalia; Araneae; Aves; Charadrius modestus; Ciconiiformes; Coleoptera; Formicidae; Invertebrata; Nearctic; Oreopholus ruficollis; Pheretima sieboldi; Pluvialis dominica; Scolopacidae; Tryngites subruficollis
Año:2005
Volumen:28
Número:2
Página de inicio:238
Página de fin:245
Título revista:Waterbirds
Título revista abreviado:Waterbirds
ISSN:15244695
CODEN:WATBF
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15244695_v28_n2_p238_Isacch

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Citas:

---------- APA ----------
Isacch, J.P., Darrieu, C.A. & Martínez, M.M. (2005) . Food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season. Waterbirds, 28(2), 238-245.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15244695_v28_n2_p238_Isacch [ ]
---------- CHICAGO ----------
Isacch, J.P., Darrieu, C.A., Martínez, M.M. "Food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season" . Waterbirds 28, no. 2 (2005) : 238-245.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15244695_v28_n2_p238_Isacch [ ]
---------- MLA ----------
Isacch, J.P., Darrieu, C.A., Martínez, M.M. "Food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season" . Waterbirds, vol. 28, no. 2, 2005, pp. 238-245.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15244695_v28_n2_p238_Isacch [ ]
---------- VANCOUVER ----------
Isacch, J.P., Darrieu, C.A., Martínez, M.M. Food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season. Waterbirds. 2005;28(2):238-245.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15244695_v28_n2_p238_Isacch [ ]