Abstract

GRILLI, Pablo G; SOAVE, Guillermo E; ARELLANO, María L  and  MASELLO, Juan F. Abundancia relativa del Loro Barranquero (Cyanoliseus patagonus) en la Provincia de Buenos Aires y zonas limítrofes de La Pampa y Río Negro, Argentina. Hornero [online]. 2012, vol.27, n.1, pp.63-71. ISSN 0073-3407.

Relative abundance of the Burrowing Parrot (Cyanoliseus patagonus) in Buenos Aires Province and nearby areas of La Pampa and Río Negro, Argentina.- The Burrowing Parrot (Cyanoliseus patagonus) is a widely distributed species in southern South America, with a variable abundance along its range. Due to its official designation as crop pest (without any objective studies that corroborated the truth of this legal status), this species has been heavily persecuted and captured for the pet trade. Currently, only Buenos Aires Province considers this species a crop pest. Nevertheless, there are no data on its relative abundance for this region. Between 2003 and 2006, we carried out a study on the abundance of the Burrowing Parrot in Buenos Aires Province and adjacent areas in the provinces of Río Negro and La Pampa. We surveyed 3156 km, divided in six sectors, where the presence of the species was seasonally recorded along 168 transects (5 km long each). Additionally, we gathered abundance data from two large roosting places. We observed a total of 765 individuals, with a mean abundance of 0.24 individuals/km. However, all individuals were observed in only 312 km, most of them restricted to three areas in southwestern Buenos Aires: near Pedro Luro city, Quequén Salado river basin, and the Comarca Serrana of Sierra de la Ventana. Observed relative abundance and distribution indicate that the Burrowing Parrot cannot be consider a crop pest.

Keywords : Argentina; Buenos Aires; Burrowing Parrot; Cyanoliseus patagonus; Pest.

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