INVESTIGADORES
TRAVAINI Alejandro
artículos
Título:
Food habits of the Crested Caracara (Caracara plancus) in the Andean Patagonia: the role of breeding constraints
Autor/es:
ALEJANDRO TRAVAINI; JOSÉ ANTONIO DONÁZAR; OLGA CEBALLOS; FERNANDO HIRALDO
Revista:
JOURNAL OF ARID ENVIRONMENTS
Editorial:
ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD
Referencias:
Año: 2001 vol. 48 p. 211 - 219
ISSN:
0140-1963
Resumen:
Crested caracara (Caracara plancus) in Patagonia have a generalist diet, feeding mqainly on mammalian carrion and arthropods. Vertebrate prey (mammals, birds and reptiles) are primarily captured to feed nestlings and marginally as food for breeding or inmature adults. Immature birds are less selective in their diet than breeding adults, consuming mainly large carrion and arthropods. This may be caused by intraspecific hierarchical interactions where immature birds are displaced by adult breeding birds to less profitable prey. On the other hand, differences between breeding adults and nestlings fit central place foraging theory predictions. Adults consume smaller prey (mostly arthropods), and take larger prey (mostly vertebrates) to the nest.