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Huitzil
versão On-line ISSN 1870-7459
Resumo
ZUNIGA, Alfredo H. e MARTIN SUBERCASEAUX, Francisco. Comparison of the diet of the Chimango Caracara (Milvago chimango) and the Burrowing Owl (Athene cunicularia) in a peri-urban site of central Chile. Huitzil [online]. 2020, vol.21, n.2, e588. Epub 17-Out-2022. ISSN 1870-7459. https://doi.org/10.28947/hrmo.2020.21.2.497.
Trophic differentiation among raptors plays an essential role in their coexistence, a situation that becomes especially problematic when there is a transformation of the habitat, leading to changes in the availability of resources. In December 2018 we exa mined the diet of Milvago chimango and Athene cunicularia in central Chile, in an area close to a landfill in Montenegro. We collected 226 pellets of M. chimango and 68 pe llets of A. cunicularia, and observed that both species concentrated a high proportion of their prey around arthropods (mainly class Insecta, with 54% and 64% for M. chiman go and A. cunicularia, respectively), with variations in the consumption of the different orders and families in each case. Both raptors had differences in the consumption of birds (5.36% for M. chimango and 1.42% for A. cunicularia) and mammals (2.53% for M. chimango and 7.13% for A. cunicularia). Both species also showed a high dietary overlap (S = 0.94). The spatial and hunting differences of each species have resulted in mechanisms that would explain their coexistence in the study area.
Palavras-chave : arthropods; central Chile; dietary overlap; garbage; pellets.