Diet of the Red-backed Hawk (Buteo polyosoma) in two environmentally contrasting areas of Patagonia
| Autor: | Sonia C. Zapata, Miguel A. Santillán, Alejandro Travaini |
|---|---|
| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Studies on Neotropical Fauna and Environment. 47:25-32 |
| ISSN: | 1744-5140 0165-0521 |
| DOI: | 10.1080/01650521.2011.649948 |
| Popis: | We studied the Red-backed Hawk (Buteo polyosoma) diet by pellet analysis in two areas, the Monumento Natural Bosques Petrificados (MNBP) and Junin de los Andes, located in southern and northwestern Argentinean Patagonia respectively. These areas have different values of primary production mainly due to the differences in mean annual precipitation, being higher in Junin de los Andes. Diets were dominated by mammals in both areas (68.3% and 61% of occurrences). Rodents represented the greatest proportion (66.5%) of prey numbers in MNBP. They represented 92.6% of the biomass. Arthropods were also consumed with a relatively high occurrence (21.4%). In Junin de los Andes, rodents were an important prey (57.1%) but represented only 29.6% of the consumed biomass. In contrast, the introduced European hare (Lepus europaeus) was not frequently consumed (13.5%) but comprised 59.3% of prey biomass. Reptiles were a frequent item, consumed at 25.2% of total prey. The diet of the Red-backed Hawk was significantly differ... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|