1Anthropology, Indiana University, Bloomington, 2Oral Biology, UIC College of Denistry
Friday All day, Plaza Level
A paternal infanticide was observed in a group of unprovisioned Bolivian gray titi monkeys, Callicebus donacophilus in Santa Cruz, Bolivia. An approximately 3 week old male infant was killed by a conspecific male. Both the mother and subadult male in the group tried, without success, to protect the infant. While risk of infanticide has been promoted as a key factor for the evolution and maintenance of monogamous social systems, there has been little direct evidence. This is the first observed case of paternal infanticide in the genus Callicebus. A genus recognized as being among the most socially monogamous of all primate species. Various reasons why infanticide is expected in this genus are discussed.