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| Format: | Artículo científico |
| Language: | es |
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Universidad Estatal a Distancia
2013
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| Online Access: | https://www.redalyc.org/articulo.oa?id=515651979017 |
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Table of Contents:
- Ecología trófica de la Garza blanca Ardea alba (Pelecaniformes: Ardeidae) en un humedal del río Paraná, Argentina Rodrigo Ezequiel Lorenzón Ana Laura Ronchi Virgolini Adolfo Héctor Beltzer Multidisciplinaria (Ciencias Naturales y Exactas) diet wetland Ardeidae Ardea alba Great Egret Feeding ecology of Great Egret Ardea alba (Pelecaniformes: Ardeidae) in a wetland of the Paraná River, Argentina. Herons as a group have contributed substantially to the eld of evolutionary ecology through studies that have helped elucidate mechanisms that allow coexistence of sympatric species. Detailed descriptions of feeding ecology are es - sential for understanding mechanisms of coexistence. Despite being one of the most common species in Argentina, detailed studies on the feeding ecology of Great Egrets Ardea alba are scarce. We studied Great Egret feeding ecology through an analysis of the stomach contents of 38 individuals captured between 1990 and 1993 in a wetland on the Paraná River, Argentina. The diet included a total of 33 taxa, with shes as the predominant prey item. The predominance of shes in the diet agrees with results of previous studies. There was, however, no evidence of di - etary selectivity. The largest proportion of prey (40%) were 21 – 30mm in length. Distribution of prey sizes diered between the Great Egret and the sympatric and congeneric Cocoi Heron ( Ardea cocoi ). Great Egrets primarily foraging in areas characterized by aquatic vegetation and in areas with open water 2013 artículo científico 1659-4266 https://www.redalyc.org/articulo.oa?id=515651979017 es http://www.redalyc.org/revista.oa?id=5156 UNED Research Journal / Cuadernos de Investigación UNED application/pdf Universidad Estatal a Distancia UNED Research Journal / Cuadernos de Investigación UNED (Costa Rica) Num.1 Vol.5