Dieta del Búho Magallánico (Bubo magellanicus) en el desierto del monte y la Patagonia argentina

NABTE, M.; SABA, S.; PARDIÑAS, U.F.J.

ORNITOLOGIA NEOTROPICAL

The Neotropical Ornithological Society

Lugar: Montreal; Año: 2006 vol. 17 p. 27 - 38

1075-4377

Diet of Magellanic Horned Owl (Bubo magellanicus) in Monte Desert and Argentine Patagonia. – We studied the diet of the Magellanic Horned Owl (Bubo magellanicus) based on 1232 preys from 346 pellets collected at eight localities in Monte Desert and Patagonia (Argentina). In six of the eight localities, this owl consumed exclusively small mammals, mainly native rodents. The analysis of the biomass input showed that, for all studied samples, one or two mammal species accounted for > 50% of the eaten prey. Specific richness for mammals ranged between 7 and 11 taxa. In one sample, corresponding to the summer and breeding period, we registered the consumption of fresh-water decapods (Aegla sp.) and high percentages (> 30%) of other invertebrates. Finally, we critically review the literature on the diet of the Magellanic Horned Owl in the Argentinean Patagonia.Bubo magellanicus) in Monte Desert and Argentine Patagonia. – We studied the diet of the Magellanic Horned Owl (Bubo magellanicus) based on 1232 preys from 346 pellets collected at eight localities in Monte Desert and Patagonia (Argentina). In six of the eight localities, this owl consumed exclusively small mammals, mainly native rodents. The analysis of the biomass input showed that, for all studied samples, one or two mammal species accounted for > 50% of the eaten prey. Specific richness for mammals ranged between 7 and 11 taxa. In one sample, corresponding to the summer and breeding period, we registered the consumption of fresh-water decapods (Aegla sp.) and high percentages (> 30%) of other invertebrates. Finally, we critically review the literature on the diet of the Magellanic Horned Owl in the Argentinean Patagonia.