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Veterinary Staff: Tobias Graessle, Jenny Jaffe, Jorge Gomez Fortun.

Eleonore Rolland: Influence of mothering style on offspring attachment.

Oscar Node-Langlois: Maternal care and the development of and affiliative interactions and the oxytocinergic system in chimpanzees.

Prince Valé: Energy consumption and usage in wild chimpanzees.

Virgile Manin: Sociality, hormones and health, together with SoHapi.

Mathilde Grampp: Social complexity & Behaviour in Mangabeys & Chimpanzees.

Mathieu Malherbe: Tool use variation across communities.

Clement Gba: Food competition in male and female mangabeys.

Tatiana Bortolato: Development of chimpanzee vocal sequences.

Sylvain Lemoine: Intergroup spacing and relationships between four neighbouring.

Patrick Tkaczynski: Maternal influence on offspring sociality and underlying hormones. Cedric Gerard-Buttoz: Primate vocal complexity - in collaboration with the Evolution of Brain Connectivity Project We assimilate behavioural, non-invasively sampled hormonal and genetic data from five wild chimpanzee communities across two subspecies with the aim to assess the impact mothers have on offspring development and on their offspring’s future adult life, for example we test the impact of post-weaning maternal loss on offspring behaviour, hormones and reproductive success. I propose to directly address this problem by determining the key influences on social bonding abilities in chimpanzees, our closest living relative, where social bonding success can be objectively quantified, and variation in underlying hormonal and cognitive mechanisms can be examined. One problem hampering progress for human studies is that social bonding success is hard to objectively quantify, particularly in adults. In humans, the resulting uncertainty likely impedes psychological and psychiatric assessment and therapy. It is proposed that early and later social experience as well as heritable factors determine social bonding abilities in adulthood, although the relative influence of each is unclear.

Social bonding success in life impacts on health, survival and fitness. In terms of the evolution of sociality, we examine underlying physiological and cognitive mechanisms that may explain links between stress, social bonds and cooperation, between non-kin as well as kin. I use long-term data sets of behavioural observations, non-invasive hormone sampling and field experiments to address these questions in chimpanzees and other wild primates, including bonobos, baboons and sooty mangabeys. I examine these from a) comparative and b) developmental perspectives addressing questions of a) sociality, health and fitness b) maternal effects on the development of sociality, cognition and communication c) species and individual variation in communication and cognition and correlated neural correlates. Together with my research group, I investigate questions related to the evolution of sociality, social cognition, communication and the brain. This is a dynamic group encompassing topics ranging from behavioural ecology and conservation to psychology and health and disease. Together with Roman Wittig, I co-direct the Tai Chimpanzee Project, Tai National Park, Ivory Coast, which currently has three habituated chimpanzee groups with a fourth under habituation, as well as one habituated sooty mangabey group.