Fishing inMacaca fascicularis: A Rarely Observed Innovative Behavior


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Abstract

Observations of fishing behavior in nonhuman primates are rare and isolated, and there is no prior published observation on the behavior in long-tailed macaques (Macaca fascicularis). We observed fishing behavior in 3 groups of long-tailed macaques from 2 separate study sites in North Sumatra and East Kalimantan, Indonesia. We propose that the behavior is rare and fulfills the requirements for classification as innovation. Further, all of the fishing individuals were watched by other members of their group, with their actions inciting attempts at fishing by them. We consider the possibility that the behavior has the potential to become cultural within the populations.

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