Affiliation: Max Planck Institute for Evolutionary Anthropology
Surbeck M, Hohmann G. Social preferences influence the short-term exchange of social grooming among male bonobos. Anim Cogn. 2015;18:573-9 pubmed publisher
..These results support the idea that emotional components are involved in the exchange of services between unrelated individuals. ..
Surbeck M, Deschner T, Behringer V, Hohmann G. Urinary C-peptide levels in male bonobos (Pan paniscus) are related to party size and rank but not to mate competition. Horm Behav. 2015;71:22-30 pubmed publisher
..The finding of a rank-bias in UCP levels in larger parties could also reflect an increase in contest competition among males over access to food. ..
Surbeck M, Mundry R, Hohmann G. Mothers matter! Maternal support, dominance status and mating success in male bonobos (Pan paniscus). Proc Biol Sci. 2011;278:590-8 pubmed publisher
..The absence of female support to unrelated males suggests that mothers gain indirect fitness benefits by supporting their sons...
Surbeck M, Deschner T, Weltring A, Hohmann G. Social correlates of variation in urinary cortisol in wild male bonobos (Pan paniscus). Horm Behav. 2012;62:27-35 pubmed publisher
..The observed increase in male cortisol may be associated with spatial proximity to oestrous females and could result from anticipated aggression from other group members, reduced feeding time in the males, or a combination of both...
Surbeck M, Langergraber K, Fruth B, Vigilant L, Hohmann G. Male reproductive skew is higher in bonobos than chimpanzees. Curr Biol. 2017;27:R640-R641 pubmed publisher
..Here, we show using the largest sample of paternity data available that, contrary to expectation, male bonobos have a higher reproductive skew and a stronger relationship between dominance rank and reproductive success than chimpanzees. ..