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	Provedor de dados 68 (3) Autor Figueroa Rojas,Ricardo A. (2) Alvarado O,Sergio A (1) Alvarado O.,Sergio (1) Corales Stappung,E. Soraya (1) Dellacasa M,Varia A (1) Figueroa R,Ricardo A (1) Schlatter,Roberto P (1) Mais... Palavra-chave Buteo polyosoma (3) Red-backed Hawk (2) Buteo albigula (1) Chilean Patagonia (1) Diet (1) Enganche aéreo de garras (1) Gliding (1) Hovering (1) Nevados de Chillán (1) Oligoryzomys longicaudatus (1) Prey selection (1) Rotación (1) Soaring (1) Mais... Tipo do documento Info:eu-repo/semantics/other (2) Info:eu-repo/semantics/article (1) Ano 2011 (1) 2003 (2) País Argentina (3) Idioma Inglês (2) Espanhol (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última 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 68 Figueroa Rojas,Ricardo A.; Corales Stappung,E. Soraya; Alvarado O.,Sergio. 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... Tipo: Info:eu-repo/semantics/article Palavras-chave: Buteo polyosoma; Chilean Patagonia; Diet; Oligoryzomys longicaudatus; Prey selection; Red-backed Hawk. Ano: 2003 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072003000100006 Enganche aéreo de garras entre un Aguilucho Andino (Buteo albigula) y un Aguilucho Común (Buteo polyosoma) en el centro-sur de Chile 68 Figueroa Rojas,Ricardo A.. Durante el verano de 2002 observé un contacto agresivo directo entre un Aguilucho Andino y un Aguilucho Común en el centro-sur de Chile. Ambas aves, en vuelo, se engancharon de sus garras y empujaron sus pies en el sentido de su contrincante, girando brevemente a modo de "rueda de carreta". Después de eso, ambas aves desengancharon sus garras. Ningún daño físico ni pérdida del control aerodinámico fueron visibles. Este tipo de demostración agresiva, utilizado presumiblemente como defensa territorial, sería el primero documentado para Falconiformes en Chile. Tipo: Info:eu-repo/semantics/other Palavras-chave: Buteo albigula; Buteo polyosoma; Enganche aéreo de garras; Rotación. Ano: 2003 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072003000100007 Flight behaviour of the Red-backed Hawk (Buteo polyosoma) during summer in Nevados de Chillán, Chile 68 Dellacasa M,Varia A; Figueroa R,Ricardo A; Alvarado O,Sergio A; Schlatter,Roberto P. We describe the flight behaviour of the Red-backed Hawk (Buteo polyosoma) during summer in Nevados de Chillán, Chile. Flight types most often used were gliding, wind-hovering and soaring (36.7%, 29.4% and 27.8% of the flying time, respectively). Spent time in gliding and wind-hovering peaked at mid-afternoon (17:00-19:00 h). Conversely, soaring was highest between mid-morning (10:00-11:00 h) and mid-day (13:00-14:00 h). Red-backed Hawk individuals appeared to use these flight types in an opportunistically manner using advantageous microclimatic and topographic conditions. Tipo: Info:eu-repo/semantics/other Palavras-chave: Buteo polyosoma; Gliding; Hovering; Nevados de Chillán; Red-backed Hawk; Soaring. Ano: 2011 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072011000200012 Registros recuperados: 3 Primeira ... 1 ... Última

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