Image Scoring in Great Apes
‘Image scoring’ occurs when person A monitors the giving behaviour of person B towards person C.We tested for ‘image scoring’ in chimpanzees, bonobos, gorillas, and orangutans. Subjects passively observed two types of incident: (i) a ‘nice’ person gave grapes to a human beggar, and (ii) a ‘nasty’ person refused to give. The subject witnessed both […]
Feeding nestlings does not function as a signal of social prestige in cooperatively breeding chestnut-crowned babblers
Humans are commonly concerned with social status, and often cooperate in the presence of others in an attempt to signal their potential as a social or reproductive partner. Whether or not cooperation might signal prestige in nonhuman animals is seldom tested and poorly understood. We investigated whether male chestnut-crowned babblers, Pomatostomus ruficeps, that are unrelated […]