Use of space, cage features, and manipulable objects by laboratory primates:individual differences and species variability (2003)

Smith, K., St. Claire, M., Byrum, R. et al.

Abstract

Rhesus (74%), longtailed (71%), vervets (94%), and patas (82%) significantly exceeded the expected rate of perch use (25%), while pigtailed (28%) did not differ from expectation. ... The effect of upper or lower tier on being near the cage front was less than anticipated for rhesus (U:57%;L:53%), pigtailed (U:94%;L:86%), and vervets (U:71%;L:71%). Rates for patas (U:64%;L:85%) and long-tailed (U:29%;L:39%) were modestly higher in the lower than the upper tier.