The give and take of food sharing in Sumatran orang-utans, Pongo abelii, and chimpanzees, Pan troglodytes

Proximate factors of primate food sharing, in contrast to its evolutionary explanations, have received little attention. Active food sharing is considered prosocial, since possessors may benefit others by spontaneously passing food or by reacting to ‘signals of need’. However, in contrast to passive sharing, active food sharing is rare in most nonhuman primates. Surprisingly, previous […]