Abstract # 52:

Scheduled for Thursday, June 21, 2012 07:00 PM-09:00 PM: Session 9 (Gardenia) Poster Presentation


J. M. Erwin1,2 and A. M. West3
1Independent Consultant, 4139 Gem Bridge Road, Needmore, PA 17238, USA, 2George Washington University, Washington, D.C., 3BIOQUAL, Inc., Rockville, MD
     Erwin, et al. (1973), reported several abnormal patterns of behavior in non-isolate-reared rhesus macaques. In subsequent studies, rates of abnormal behavior were found to be much higher in macaques reared in social isolation, even after therapeutic socialization. Across the past 40 years, abnormal behavior has been observed by the primary author in socially housed and stimulus-rich situations in rhesus, pigtailed, longtailed, stumptailed, and Sulawesi macaques. The effects of many kinds of environmental enrichment have been evaluated, including social housing and provision of manipulable objects. Most objects tested were effective in reducing incidence of abnormal behaviors in short-term PRE-TEST, TEST, POST-TEST experiments, as well as long-term continuous exposure trials. Object preferences and habituation rates were demonstrated in choice tests (three at once) and tournaments (sequential simultaneous choices), as well as preferences of familiar over novel objects. Results of recent studies confirm the value of social housing for reducing rates of most self-directed aggressive displays.