The benefits to nonhuman primates living in social groupings are well established. However, when certain research that requires housing subjects singly is performed, there are no guidelines as to how paired nonhuman primates should best...
In order to prevent physical and psychological deterioration in older animals, it is important to apply the same principles of environmental enrichment and housing as are applied to younger animals. As we have discussed above...
A clear, perforated, plexiglass divider was installed between neighboring cynos to test whether it altered their proximity to one another, or prompted any behavioral changes. ... Adult male cynomolgus monkeys tend not to spend a...
At the Oregon National Primate Research Center, we train animals to enter transfer boxes using positive reinforcement training (PRT), a type of training in which the trainer reinforces desired behaviors (such asentering the transfer box)...
Previous research has suggested that chimpanzees (Pan troglodytes) display higher levels of aggression in captivity than in the wild. One of the challenges of captive management, therefore, is to balance the chimpanzees' need for social...
These mounds (6 x 4 x 4 ft.) are small enough to fit inside the entrance to the outdoor play yard, yet large enough to prevent the mound from tipping over with several animals on...
Forming successful groups of rhesus macaques (Macaca mulatta) can be challenging. Males in particular do not always get along, and some need to be permanently removed due to fighting and trauma. Early rearing condition may...
Measures of temperament in nonhuman primates generally reflect interactions between inherent individual characteristics and environmental contexts, and they may be indicators of physical and psychological well-being. Heritable aspects of temperament have been identified, but it...
Environmental enrichment strategies are used to improve both the physiological and psychological welfare of captive animals, which can be achieved by increasing the expression of natural behaviour and decreasing abnormal behaviours. Examples of successful environmental...
At Charles River Laboratories (Reno, NV), we have a high rate of success when socializing juvenile and sub-adult cynomolgus macaques (Macaca fascicularis). Until recently, we would rarely attempt to introduce adult males through progressive contact...