Task-oriented feeding device for singly caged primates (1992)

Murchison, M. A.

Abstract

A perforated hard plastic ball loaded with peanuts was attached to the outside of the cage. The [single-housed] animals spent most of their time sitting on their cage perches [females 66%, males 36%]. Manipulating the foraging device was the second most time-consuming activity [males 22%, females 8%].