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      Selective consumption of rodents by the Variable hawk Geranoaetus polyosoma (Accipitriformes: Accipitridae) in the Atacama Desert, northern Chile

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          Abstract

          ABSTRACT Geranoaetus polyosoma (Quoy & Gaimard, 1824) is a diurnal raptor widely distributed in South America. Although the trophic ecology of this bird has been more studied in the southern extreme of its range, little information is available on its dietary response to prey supply in desert environments. In the present study, we report on the trophic ecology of G. polyosoma in a sub-urban desert zone in northern Chile, with the following objectives: (1) to quantitatively describe its diet and (2) to determine its dietary selectivity in response to prey supply in the study area. The diet of G. polyosoma consisted mainly of rodents (97.2%). A greater preference (p < 0.05) was observed for the following large prey items (> 19.5 g): two native rodent species, Phyllotis xanthopygus (Waterhouse, 1837) and Eligmodontia puerulus (Philippi, 1896); and two introduced rodent species: Rattus rattus (Linnaeus, 1769) and R. norvegicus (Berkenhout, 1769).

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          Most cited references 52

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          Some Characteristics of Simple Types of Predation and Parasitism

           C S Holling (1959)
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            Complex Trophic Interactions in Deserts: An Empirical Critique of Food-Web Theory

             Gary A. Polis (1991)
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              Measurement of Diversity

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                Author and article information

                Journal
                zool
                Zoologia (Curitiba)
                Zoologia (Curitiba)
                Sociedade Brasileira de Zoologia (Curitiba, PR, Brazil )
                1984-4670
                1984-4689
                2020
                : 37
                Affiliations
                Bío-Bío orgnameUniversidad de Concepción orgdiv1Facultad de Ciencias Naturales y Oceanográficas orgdiv2Departamento de Zoología Chile
                Osorno Los Lagos orgnameUniversidad de Los Lagos orgdiv1Departamento de Ciencias Biológicas & Biodiversidad orgdiv2Laboratorio de Ecología Chile
                Valdivia orgnameCentro de Estudios Agrarios y Ambientales orgdiv1Programa de Conservación de Aves Rapaces Chile
                Temuco Araucanía orgnameUniversidad Católica de Temuco orgdiv1Departamento de Ciencias Ambientales orgdiv2Facultad de Recursos Naturales Chile
                Article
                S1984-46702020000100330 S1984-4670(20)03700000330
                10.3897/zoologia.37.e55615

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 48, Pages: 0
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                Categories
                Research Article

                trophic ecology, Red-backed hawk, Diet, predation

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