| Abstract: | Survival and fertility rates of captive De Bràzza's guenons (Cercopithecus neglectus), based on the 575 known captive animals in 70 zoos and institutions worldwide, were calculated. The results suggest that the high level of infant mortality (males: dx(day 1-yr 1) = 0.73 males; females; dx(day 1-yr 1) = 0.51), low fertility rate (Σ m′x = 1.69), and differential mortality due to the incidence of stillbirths (males: dx(day 1) = 0.676, females: dx(day 1) = 0.442) may threaten the viability of this population. Possible causes of differential mortality rates are discussed and questions requiring additional research are identified. |
