During the latter half of the last century, evidence of reproductive competition between males
and male selection by females led to the development of a stereotypical view of sex …

The macaque radiation is as old as the hominin radiation, approximately 7 million years.
After Homo, Macaca has the widest geographical range among primates, and both of these …

For animals living in mixed-sex social groups, females who form strong social bonds with
other females live longer and have higher offspring survival [1–3]. These bonds are highly …

Although competition between females is one of the cornerstones of the theory of natural
selection, most studies of reproductive competition have focussed principally on mating …

Primates, like other mammals, exhibit an annual reproductive pattern that ranges from strictly
seasonal breeding to giving birth in all months of the year, but factors mediating this …

Humans exhibit major age-related shifts in social relationships along with changes in social
and emotional psychological processes that underpin these behavioural shifts. Does social …

In group-living animals relative rank positions are often associated with differences in
glucocorticoid output. During phases of social stability, when dominance positions are clear …

We investigated relationships between fecal androgen concentrations, facial coloration and
behaviour in semi-free-ranging male mandrills. We found that fecal androgen levels were …

Extant literature in developmental psychology has documented the co-occurrence of
aggressive and affiliative behaviors with various measures of social dominance. While these …

Recent studies have uncovered remarkable variation in paternity within primate groups. To
date, however, we lack a general understanding of the factors that drive variation in paternity …