Reinhardt, V., Houser, W. D., Cowley, D. et al. 1987. Preliminary comments on environmental enrichment with branches for individually caged rhesus monkeys. Laboratory Primate Newsletter 26(1), 1-3.

The branches not only were attractive to the majority (87%) of [single-housed] animals but they were also inexpensive and easy to install and to clean.

Year

1987