English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/47101
logo share SHARE   Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

DC FieldValueLanguage
dc.contributor.authorHiraldo, F.-
dc.contributor.authorDonázar, José A.-
dc.contributor.authorCeballos, Olga-
dc.contributor.authorTravaini, Alejandro-
dc.contributor.authorBustamante, Javier-
dc.contributor.authorFunes, Martín-
dc.identifier.citationWilson Bull, 107(4), 1995, pp. 675—685es_ES
dc.description.abstractWe studied the breeding performance of a Grey Eagle-Buzzard (Geranoaetus melanoleucus) population in a region of northern Argentinian Patagonia where two different habitats occur; the mountains near the Andean cordiBera and the plains where shrub-steppes predominate. Mean eagle density was I pair/I 9 km2 (N = 44), with higher densities occuring in the plains (1 pair/13.2 km2. N — 17) than in the mountains (1 pair/22.7 km2. N = 27). We located four communal roosts, with a maximum number of 14 immature birds roosting together. Of 1254 prey items identified from pellets, most were European hares (Lepus europaeus) (58.2%), rodents (19.1%), and birds (16.5%). Diet varied between pairs and between those breeding in the mountains and those in the plains. The number of nests per pair was significantly higher in the plains (5.1 nests/pair, N = 9 pairs) than in the mountains (3.2 nests/pair, N = 14 pairs). Breeding success was similar in both breeding seasons. About 80% of the pairs laid eggs and over 60% successfully raised at least one young. The number of fledgling young per pair varied between one and three. The mean number of fledglings per successful pair was 1.8. The values of breeding density and success are the highest published for this species (and among the highest for other large eagles), probably because the species exploits the abundant European hare, a mammal introduced to Patagonia at the beginning of the century.es_ES
dc.publisherWilson Ornithological Societyes_ES
dc.titleBreeding biology of Grey eagle-buzzard (Geranoaetus melanoleucos) population in Patagoniaes_ES
dc.description.peerreviewedPeer reviewedes_ES
Appears in Collections:(EBD) Artículos
Files in This Item:
File Description SizeFormat 
dec.1995.pdf640,72 kBAdobe PDFThumbnail
Show simple item record

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.