A breeding colony of owl monkeys (Aotus trivirgatus) established in 1972 produced 35 live infants during the first 3 years from an average daily population of 30 monogamous pairs. Initial productivity was poor, but once the breeding pairs were set up by karyotypes, reproductive performance improved.
Attempts to establish successful breeding colonies of Aotus trivirgatus at this and other laboratories have largely been unsuccessful, resulting in only occasional pregnancies and a rare live birth. After the recognition of seven different karyotypes of owl monkeys, animals were paired on this basis