Abstract # 31:

Scheduled for Thursday, June 21, 2012 03:45 PM-04:00 PM: Session 8 (3rd Floor All Space) Oral Presentation


LONGITUDINAL EFFECTS OF DIFFERENTIAL REARING IN LABORATORY-HOUSED CHIMPANZEES (PAN TROGLODYTES)

A. W. Clay1,2, K. A. Bard3, M. A. Bloomsmith1, T. L. Maple2, M. J. Marr2 and H. Rollins2
1Yerkes National Primate Research Center, Behavioral Management Unit, 954 Gatewood Dr, Atlanta, GA 30329, USA, 2Georgia Institute of Technology, 3University of Portsmouth
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     Between 1987 and 1995, chimpanzees were raised in one of two nurseries at the Yerkes National Primate Research Center. Basic care was provided in both nurseries, but responsive care (RC) included specially-trained researchers providing for emotional needs and encouraging chimpanzee communication for 4 hours each weekday until the chimpanzees were one year old. At one year of age, all the chimpanzees were reared in similar conditions in the standard nursery environment. In 2011-2012, 22 of these chimpanzees, now adults, were assessed and compared to 11 mother-reared (MR) chimpanzees. Adult chimpanzees from both nurseries (NR) exhibited higher rates of abnormal behavior (U = 14.0, p = .004; U = 30.0, p = .026) and attendance to humans (U = 7.0, p = .001; U = 20.0, p = .005) than MR. NR were rated as exhibiting higher human orientation (U = 41.0, p = .002) and lower subjective well-being (U = 54.0, p = .006) than MR. RC chimpanzees attended to (U = 25.0, p = .021) and negatively solicited humans (U = 23.5, p = .008) more than standard care (ST) chimpanzees. Further research should be conducted on welfare-related issues regarding mother-versus-nursery rearing, and long-term effects of different methods of nursery rearing for chimpanzees.