Chimpanzees exhibit reduced food theft among friends

A study conducted by researchers at the University of California, Berkeley, reveals that friendship influences food-stealing behavior among chimpanzees. Based on over 800 hours of observation of 26 chimpanzees at the Ngamba Island Chimpanzee Sanctuary in Uganda, the research indicates that chimpanzees steal food less frequently from individuals with whom they maintain close social bonds.

The study, published in the journal Evolution and Human Behavior, suggests that chimpanzees exhibit different emotional reactions depending on whether the perpetrator or the victim of theft is a friend. Researchers identified close relationships through behaviors such as grooming frequency and daily social interactions. The findings provide insight into the evolutionary origins of social behaviors and collaborative relationships in primates.