Pairing successes with male cynomolgus macaques after vasectomy (2001)

Statz, L. M., Borde, M.

Abstract

Problem: Traumatism, self-traumatism and better environmental enrichment of singly housed Male Cynos in our colony of approximately 100 Cynos.We also encountered incidents of aggressive behavior towards caretakers and stereotypical behaviors such as overgrooming.Approach: In our primate environmental enrichment program, we had always tried to pair monkeys whenever possible. We had made successful pairing of females but had never been very successful with males. Desire to have some males paired led to the decision to perform vasectomies and pair male Cynos with females.Observations: Dramatic reduction of injuries to vasectomized and paired male Cynos. Stereotypical behavior problems also decreased.Conclusions: At this point in time we have vasectomized 15 male Cynos and successfully paired them with females. A conservative estimate of 80% reduction in injuries has been realized. We conclude that pairing male Cynomolgus Macaques is a major contributing factor to keeping our Cynomolgus colony happier and healthier.