Abstract # 4391 Poster # 138:

Scheduled for Friday, June 22, 2012 07:00 PM-09:00 PM: Session 22 (Gardenia) Poster Presentation


K. Andrews, N. Morelli, E. Ruesterholz, S. McAllister and K. Coleman
Oregon National Primate Res. Ctr., 505 NW 185th Ave, Beaverton, OR 97006, USA
     The use of substrate can have benefits to group housed macaques, including decreased aggression and increased foraging. Still, in some facilities, the use of bedding is perceived as time intensive and costly. In this study, we examined the use of wood shavings on husbandry issues (e.g., time for cleaning) and behavior in outdoor environmentally controlled housing units over a one month period. Each unit was 1400 square feet and contained 30-50 rhesus macaques (Macaca mulatta). We put pine shavings in 4 housing units, a mixture of pine and aspen shavings in 4, and left 4 units without bedding. We compared the time it took to clean the units, as well as water use. We also took daily focal observations in 2 randomly selected adult females per group. There were no differences between the groups with the pine and pine/aspen shaving. Overall, it took significantly more time and water to clean the non-bedded units compared to those with bedding (Time: Kruskal-Wallis H= 7.3, p=0.03; Water: H=7.0, p=0.03). While all groups received enrichment devices designed to promote foraging, animals in groups with substrate spent more time foraging compared to those without (H=17.3, p<0.001). Animals in bedded units also engaged in less self-grooming than those in units without bedding (H=8.9, p=0.01). Bedding can be a cost-effective form of enrichment for group-housed macaques.