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Uneven Sex-Ratio of Wild Rabbits Taken by Golden Eagles

Carmelo Fernández and Olga Ceballos
Ornis Scandinavica (Scandinavian Journal of Ornithology)
Vol. 21, No. 3 (Sep., 1990), pp. 236-238
Published by: Wiley on behalf of Nordic Society Oikos
DOI: 10.2307/3676783
Stable URL: http://www.jstor.org/stable/3676783
Page Count: 3
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Uneven Sex-Ratio of Wild Rabbits Taken by Golden Eagles
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Abstract

The sex-ratio of rabbits Oryctolagus cuniculus taken by Golden Eagles Aquila chrysaetos in northern Spain was investigated by sexing pelvic bones from remains found in eyries. The sex-ratio of rabbits in the field was estimated simultaneously by sampling warrens with ferrets and by hunting drives with dogs. The proportion of male rabbits taken by Golden Eagles better approximated that available on the ground during the day than the sex-ratio in the warrens, possibly as a result of greater male above-ground activity.

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