Group size, foraging, and antipredator ploys: An analysis of bighorn sheep decisions
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- Berger, J. Behav Ecol Sociobiol (1978) 4: 91. doi:10.1007/BF00302563
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Several aspects of the foraging behavior of California bighorn sheep (Ovis canadensis californiana) were studied in homogeneous habitats in the interior of British Columbia, Canada. The manner in which an individual sheep foraged was based upon the size of group within which it was found.
In small groups (five or less individuals) sheep foraging efficiency was poor and interruptions of foraging to scan the environment were frequent.
Alarm vocalizations and other conspicuous behaviors tend to alert their neighbors to the presence of disturbances. It appears that these signals cannot be based solely as the result of kin selection.