Long-term effects of a food puzzle on the behaviour of rhesus monkeys (2001)

Florence, G., Riondet, L.

Abstract

Five adult males were tested during a 17 week period. Access to a food puzzle yielded an overall reduction in, or even disappearance of, the stereotyped locomotion, the stereotyped self-directed beahviours and the saluting behaviour that had been observed when the animals had access to ordinary food dispensers.