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Reward of Labor Coordination and Hunting Success in Wild Chimpanzees

Penelitian - Cooperative hunting and meat sharing are hypothesized as fundamental to human life history adaptations and biological success. Wild chimpanzees also hunt in groups, and despite the potential of inferring ancestral hominid adaptations, it remains unclear whether chimpanzee hunting is a cooperative act.

Hunting and meat sharing are often cooperative activities in humans and are maintained by various processes, such as kin selection, reward of labor, increased reputation, or reciprocity.

Penelitian Reward of Labor Coordination and Hunting Success in Wild Chimpanzees

Although cooperative hunting has been observed in such as lion-fish, carnivores, cetaceans, and chimpanzees, the complexity of labor and the exchange of meat in humans appears unique.

Liran Samuni of the Max Planck Institute for Evolutionary Anthropology at Leipzig and colleagues show support for cooperative acquisition in wild chimpanzees (Pan troglodytes verus) of the Taï Forest, Côte d’Ivoire, since hunters are more likely to receive meat than bystanders, independent of begging effort.

Engagement in prey searches and higher hunt participation independently increase hunting success, suggesting that coordination may improve motivation in joint tasks. Researchers also find higher levels of urinary oxytocin after hunts and prey searches compared with controls.

“Chimpanzee hunting is cooperative, likely facilitated by behavioral and neuroendocrine mechanisms of coordination and reward. If group hunting has shaped humans’ life history traits, perhaps similar pressures acted upon life history patterns in the last common ancestor of human and chimpanzee,” Samuni said.

The team also find that both the number of hunters and participation in hunt patrols increases hunting success. The evidence in chimpanzees of the Taï forest for cooperation in group hunting considered a key building block of the unique human foraging niche.

Journal : Liran Samuni et al. Reward of labor coordination and hunting success in wild chimpanzees, Communications Biology, 10 September 2018, DOI:10.1038/s42003-018-0142-3



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