Diet of the Red-backed Hawk (Buteo polyosoma) in a forested area of the Chilean Patagonia and its relation to the abundance of rodent prey

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The diet of Red-backed Hawk (Buteo polyosoma) was quantified by analyzing 40 pellets collected during winter and spring 1999 and winter 2000 in a forested area of Aysén, Chilean Patagonia. Rodents were the most numerous prey (82% of all prey), and accounted for the highest contribution to total biom...

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Autores principales: Figueroa Rojas, Ricardo A., Corales Stappung, E. Soraya, Alvarado O., Sergio A.
Formato: Artículo publishedVersion
Lenguaje:Español
Publicado: Aves Argentinas. Asociación Ornitológica del Plata 2003
Materias:
BUTEO POLYOSOMA
CHILEAN PATAGONIAPATAGONIA CHILENA
DIETA
OLIGORYZOMYS LONGICAUDATUS
SELECCION DE PRESAS
AGUILUCHO COMUN
RED-BACKED HAWK
DIET
CHILEAN PATAGONIA
PREY SELECTION
Acceso en línea:https://hdl.handle.net/20.500.12110/hornero_v018_n01_p043
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id hornero:hornero_v018_n01_p043
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spelling hornero:hornero_v018_n01_p0432023-09-08T19:05:40Z Diet of the Red-backed Hawk (Buteo polyosoma) in a forested area of the Chilean Patagonia and its relation to the abundance of rodent prey Dieta del aguilucho común (Buteo polyosoma) en un área boscosa de la patagonia chilena y su relación con la abundancia de roedores presa Hornero (en línea) 2003;01(018):043-052 Figueroa Rojas, Ricardo A. Corales Stappung, E. Soraya Alvarado O., Sergio A. BUTEO POLYOSOMA CHILEAN PATAGONIAPATAGONIA CHILENA DIETA OLIGORYZOMYS LONGICAUDATUS SELECCION DE PRESAS AGUILUCHO COMUN RED-BACKED HAWK BUTEO POLYOSOMA DIET OLIGORYZOMYS LONGICAUDATUS CHILEAN PATAGONIA PREY SELECTION The diet of Red-backed Hawk (Buteo polyosoma) was quantified by analyzing 40 pellets collected during winter and spring 1999 and winter 2000 in a forested area of Aysén, Chilean Patagonia. Rodents were the most numerous prey (82% of all prey), and accounted for the highest contribution to total biomass (83%). Among rodents, Oligoryzomys longicaudatus was the most consumed prey species, accounting for 70% of total number and 64% of total biomass. Birds accounted for less than 6% in number, but their biomass contribution was significantly higher (more than 15%). Insects constituted 12% in number, but less than 0.5% of total biomass. The Red-backed Hawk seemed to consume Oligoryzomys longicaudatus according to their field abundance. Also, it seemed to prey disproportionately upon young adult rodents. Relating these results with previous studies on the same species, we conclude that this hawk mostly predates upon vertebrate species throughout its distribution range, with rodents being the most important prey. La dieta del Aguilucho Común (Buteo polyosoma) fue cuantificada sobre la base de 40 regurgitados colectados durante el invierno y la primavera de 1999 y el invierno de 2000 en un área boscosa de Aysén, en la Patagonia chilena. Los roedores fueron las presas más numerosas (82% del total de presas) y constituyeron el mayor aporte de biomasa (83%). El roedor más consumido fue Oligoryzomys longicaudatus, que alcanzó el 70% del número total de presas y el 64% en biomasa. La incidencia numérica de las aves fue baja (menor a 6%), pero la contribución en biomasa fue mayor (más del 15%). Los insectos constituyeron el 12% del total de presas, pero menos del 0.5% en biomasa. El Aguilucho Común pareció consumir a Oligoryzomys longicaudatus de acuerdo a su abundancia en el ambiente. El Aguilucho Común también pareció depredar de manera desproporcionada sobre roedores adultos jóvenes. Una revisión de estudios anteriores indica que las especies de vertebrados son el núcleo de la dieta de este aguilucho a lo largo de su rango de distribución, siendo los roedores las presas más relevantes. Aves Argentinas. Asociación Ornitológica del Plata 2003-08 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf spa info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar https://hdl.handle.net/20.500.12110/hornero_v018_n01_p043
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Español
orig_language_str_mv spa
topic BUTEO POLYOSOMA
CHILEAN PATAGONIAPATAGONIA CHILENA
DIETA
OLIGORYZOMYS LONGICAUDATUS
SELECCION DE PRESAS
AGUILUCHO COMUN
RED-BACKED HAWK
BUTEO POLYOSOMA
DIET
OLIGORYZOMYS LONGICAUDATUS
CHILEAN PATAGONIA
PREY SELECTION
spellingShingle BUTEO POLYOSOMA
CHILEAN PATAGONIAPATAGONIA CHILENA
DIETA
OLIGORYZOMYS LONGICAUDATUS
SELECCION DE PRESAS
AGUILUCHO COMUN
RED-BACKED HAWK
BUTEO POLYOSOMA
DIET
OLIGORYZOMYS LONGICAUDATUS
CHILEAN PATAGONIA
PREY SELECTION
Figueroa Rojas, Ricardo A.
Corales Stappung, E. Soraya
Alvarado O., Sergio A.
Diet of the Red-backed Hawk (Buteo polyosoma) in a forested area of the Chilean Patagonia and its relation to the abundance of rodent prey
topic_facet BUTEO POLYOSOMA
CHILEAN PATAGONIAPATAGONIA CHILENA
DIETA
OLIGORYZOMYS LONGICAUDATUS
SELECCION DE PRESAS
AGUILUCHO COMUN
RED-BACKED HAWK
BUTEO POLYOSOMA
DIET
OLIGORYZOMYS LONGICAUDATUS
CHILEAN PATAGONIA
PREY SELECTION
description The diet of Red-backed Hawk (Buteo polyosoma) was quantified by analyzing 40 pellets collected during winter and spring 1999 and winter 2000 in a forested area of Aysén, Chilean Patagonia. Rodents were the most numerous prey (82% of all prey), and accounted for the highest contribution to total biomass (83%). Among rodents, Oligoryzomys longicaudatus was the most consumed prey species, accounting for 70% of total number and 64% of total biomass. Birds accounted for less than 6% in number, but their biomass contribution was significantly higher (more than 15%). Insects constituted 12% in number, but less than 0.5% of total biomass. The Red-backed Hawk seemed to consume Oligoryzomys longicaudatus according to their field abundance. Also, it seemed to prey disproportionately upon young adult rodents. Relating these results with previous studies on the same species, we conclude that this hawk mostly predates upon vertebrate species throughout its distribution range, with rodents being the most important prey.
format Artículo
Artículo
publishedVersion
author Figueroa Rojas, Ricardo A.
Corales Stappung, E. Soraya
Alvarado O., Sergio A.
author_facet Figueroa Rojas, Ricardo A.
Corales Stappung, E. Soraya
Alvarado O., Sergio A.
author_sort Figueroa Rojas, Ricardo A.
title Diet of the Red-backed Hawk (Buteo polyosoma) in a forested area of the Chilean Patagonia and its relation to the abundance of rodent prey
title_short Diet of the Red-backed Hawk (Buteo polyosoma) in a forested area of the Chilean Patagonia and its relation to the abundance of rodent prey
title_full Diet of the Red-backed Hawk (Buteo polyosoma) in a forested area of the Chilean Patagonia and its relation to the abundance of rodent prey
title_fullStr Diet of the Red-backed Hawk (Buteo polyosoma) in a forested area of the Chilean Patagonia and its relation to the abundance of rodent prey
title_full_unstemmed Diet of the Red-backed Hawk (Buteo polyosoma) in a forested area of the Chilean Patagonia and its relation to the abundance of rodent prey
title_sort diet of the red-backed hawk (buteo polyosoma) in a forested area of the chilean patagonia and its relation to the abundance of rodent prey
publisher Aves Argentinas. Asociación Ornitológica del Plata
publishDate 2003
url https://hdl.handle.net/20.500.12110/hornero_v018_n01_p043
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