Abstract
Comparative studies of free-ranging groups ofCebus albifrons andCebus apella in eastern Colombia showed strong differences in the manner in which groups of each species interacted.Cebus albifrons troops were large and multi-male; they showed strongly aggressive tendencies towards neighboring groups of the same species and they defended a territory with little overlap of neighbors, both by means of long-distance spacing calls and by fighting. In contrast,Cebus apella troops were small, sometimes containing only one adult male; they exhibited pacific interactions and curiosity towards neighboring groups of the same species and did not defend a territory, allowing extensive overlapping with their neighbors. Such social differences in closely related species which are found in identical habitats call into question purely ecological interpretations for such differences.
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Defler, T.R. A comparison of intergroup behavior inCebus albifrons andC. apella . Primates 23, 385–392 (1982). https://doi.org/10.1007/BF02381321
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DOI: https://doi.org/10.1007/BF02381321