|
|
|
|
|
| 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 |
| |
|
| |
|
|
| MORANO-BÜCHNER,CAROLINA; ARAVENA,JUAN. C. |
| In this study we present preliminary results on the use of the lichenometric method for age estimation of moraine formation in the Mount San Lorenzo area (47°30' S, 72°21' W), southern Chile. We estimated lichen growth rates of individuals of genus Rhizocarpon, section Rhizocarpon, at two glacier-proximal sites for which independent age estimates were available. These two sites, Lake Shore and Moraine A, presented lichen mean annual growth rates of 0.33 mm and 0.15 mm, respectively. We applied these growth rates to two sites lacking previous dating control: Bedrock and Moraine B, and obtained minimum ages of 70 and 473 years, respectively. Our results allow us to confirm that there is a quantifiable relationship between Rhizocarpon size and age of the... |
| Tipo: Journal article |
Palavras-chave: Chilean Patagonia; Glacial moraines; Lichenometry; Mount San Lorenzo. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000400008 |
| |
|
|
|
