The problem of foraging in captive callitrichid primates: Behavioral time budgets and foraging skills (1989)

Molzen, E. M. , French, J. A.

Abstract

The group-housed animals had to hang from above, or sit on the covered bowl to obtain raisins that were mixed with ground corn cob. The device reduced foraging yield and increased foraging effort to levels similar to those observed in free-ranging populations. These dramatic changes in behavioral profiles were produced even though the foraging device was supplemental to, rather than a replacement for, standard provisioning.