Food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season

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 s...

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Autores principales:	Isacch, J.P., Darrieu, C.A., Martínez, M.M.
Formato:	JOUR
Lenguaje:	English
Materias:	Argentina Diet Dotterels Feces Grassland Migratory shorebirds Plovers Prey abundance Sandpipers diet food availability migratory species prey preference wader 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
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_15244695_v28_n2_p238_Isacch
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_15244695_v28_n2_p238_Isacch
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spelling	todo:paper_15244695_v28_n2_p238_Isacch2023-10-03T16:20:55Z Food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season Isacch, J.P. Darrieu, C.A. Martínez, M.M. 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 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. JOUR English info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15244695_v28_n2_p238_Isacch
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language	English
orig_language_str_mv	English
topic	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
spellingShingle	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 Isacch, J.P. Darrieu, C.A. Martínez, M.M. Food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season
topic_facet	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
description	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.
format	JOUR
author	Isacch, J.P. Darrieu, C.A. Martínez, M.M.
author_facet	Isacch, J.P. Darrieu, C.A. Martínez, M.M.
author_sort	Isacch, J.P.
title	Food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season
title_short	Food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season
title_full	Food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season
title_fullStr	Food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season
title_full_unstemmed	Food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season
title_sort	food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season
url	http://hdl.handle.net/20.500.12110/paper_15244695_v28_n2_p238_Isacch
work_keys_str_mv	AT isacchjp foodabundanceanddietaryrelationshipsamongmigratoryshorebirdsusinggrasslandsduringthenonbreedingseason AT darrieuca foodabundanceanddietaryrelationshipsamongmigratoryshorebirdsusinggrasslandsduringthenonbreedingseason AT martinezmm foodabundanceanddietaryrelationshipsamongmigratoryshorebirdsusinggrasslandsduringthenonbreedingseason
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Food abundance and dietary relationships among migratory shorebirds using grasslands during the non-breeding season

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