Convergent evidence from many species reveals the evolutionary origins of human
friendship. In horses, elephants, hyenas, dolphins, monkeys, and chimpanzees, some …

A central assumption of baboon socio‐ecological models is that all populations have the
same capacity to react to different environments. The burden of our argument is that this …

This comprehensive introductory text integrates evolutionary, ecological, and demographic
perspectives with new results from field studies and contemporary noninvasive molecular …

In mammals, high dominance rank among males is often associated with mating success.
However, mating opportunities do not automatically translate into offspring production; …

Adult male baboons (Papio cynocephalus) give loud two-syllable'wahoo'calls during dawn
choruses, interactions between groups, when chasing females, and in aggressive …

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 …

Friendships can foster happiness, health, and reproductive fitness. However, friendships
end—even when we might not want them to. A primary reason for this is interference from …

We used long-term data on mate guarding and paternity in mandrills, Mandrillus sphinx,(1)
to examine cycle day and cycle selection by males;(2) to examine associations between …

The causes and consequences of being in a particular dominance position have been
illuminated in various animal species, and new methods to assess dominance relationships …

Male mate-guarding episodes ('consortships'), are taxonomically widespread, yet costly to
individual males. Consequently, males should bias consortships toward females with whom …