Although touch is one of the most neglected modalities of communication, several lines of
research bear on the important communicative functions served by the modality. The authors …

Seyfarth (1977, Journal of Theoretical Biology, 65, 671–698) proposed a model of social
grooming among female monkeys that has had an enormous influence in the primatological …

Andreas Koenig is Assistant Professor at the State University of New York at Stony Brook.
His research focuses on the evolution of sociality and social behavior, feeding ecology …

Many species use touching for reinforcing social structures, and particularly, non-human
primates use social grooming for managing their social networks. However, it is still unclear …

Cooperative behavior is a hallmark of the primate order. Cooperation is therefore an area of
intensive theoretical research in biology, anthropology, political sciences and economics, as …

We studied social organization, behavior, and range use of the Yunnan snub-nosed monkey
(Rhinopithecus bieti) at Wuyapiya (99° 12′ E, 28° 30′ N, the People's Republic of China) …

Several hypotheses have been proposed to explain the evolution of altruistic behaviours.
Their relative roles in explaining actual cases of animal altruism are, however, unclear. In …

This field study investigated the social organization, range use and diet of the Yunnan snub-
nosed langur Rhinopithecus bieti (Colobinae). Systematic observations were conducted …

Several hominin genera evolved to use savanna and woodland habitats across Pliocene
Africa. This radiation into novel niches for apes occurred despite a daunting array of …

Affiliative relationship formation in nonhuman primates is influenced by kinship, rank and
sex, but these factors do not fully explain observed variation in primate social relations …