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  운영자 2005-06-29 21:02:30 | Hit : 13303 | Vote : 2426
Subject   [자료] Prey Selection by Breeding and Nonbreeding Barn Owls in Argentina
The Auk 115(1):224-229, 1998

Prey Selection by Breeding and Nonbreeding Barn Owls in Argentina

M. ISABEL BELLOCQ •
Departamento de Ciencias Bioldgicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. 2, 1428 Buenos Aires, Argentina

Numerous studies have focused on the foraging ecology of Barn Owls (Tyto alba). Food habits of Barn Owls have been described from many regions of the world (e.g. Herrera 1974, Dean 1975, Morton and
Martin 1979, Jaksifi et al. 1982, De Santis et al. 1983, Lenton 1984, Campbell et al. 1987, Bellocq 1990, Nores and Guti4rrez 1990). In most parts of their range, Barn Owls feed primarily on small mammals
and occasionally on a variety of other vertebrates. Further studies have demonstrated that the food niche of Barn Owls varies in time and space (Marti 1988) and have established the role of the species
within assemblages of vertebrate predators (Jaksifi and Delibes 1987, Marti et al. 1993). Differential predation by Barn Owls on the species, size, and/or sex of small mammals has been reported in populations
from both northern (Derting and Crandford 1989) and southern (Jaksifi and Yfifiez 1979, Dickman et al. 1991, Bellocq and Kravetz 1994) latitudes.
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