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Dieta de aves migratorias en un sistema agroecológico del Valle del Cauca, Colombia

Authors: Hurtado-Giraldo, Alejandra; Cruz-Bernate, Lorena; Molina, Enrique José;

Dieta de aves migratorias en un sistema agroecológico del Valle del Cauca, Colombia

Abstract

Aunque cerca de 10% de la diversidad de aves en Colombia está representada por avifauna migratoria transcontinental, aún se desconocen muchos aspectos ecológicos importantes para su conservación. El presente trabajo investigó la dieta de aves migratorias y la oferta de artrópodos en la Reserva Natural El Hatico, un agroecosistema en el departamento del Valle del Cauca, suroccidente de Colombia. Se hicieron censos visuales y capturas con redes de niebla. A cada ave capturada se le suministró por vía oral solución salina al 1% para obtener muestras de excrementos, en las cuales los restos de insectos fueron identificados, cuantificados y analizados. La disponibilidad de artrópodos se estableció mediante muestreos y se elaboró una colección de referencia. La dieta de cinco especies migratorias capturadas fue similar y estuvo constituida principalmente por Coleoptera, Hymenoptera y Araneae, mientras que los órdenes más abundantes en el muestreo del agroecosistema fueron Diptera, Hemiptera y Coleoptera. Se sugiere que las especies que llegan a la reserva natural presentan sobreuso de ciertas presas en su alimentación, dirigida principalmente hacia artrópodos, y posiblemente condicionada por la capacidad de hallazgo de los ítems y las estrategias de búsqueda de alimento de las especies.

Keywords

Barn Swallow, agroecosystems, dieta, Hirundo rustica, Tropical dry-forest, Catharus ustulatus, Yellow Warbler, Diet, bosque seco, Empidonax virescens, Swainson's Trush, Geothlypis philadelphia, Acadian Flycatcher, agroecosistemas, Mourning Warbler, Setophaga petechia

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
Green