Chimpanzee

Causes of body rocking in chimpanzees (Pan troglodytes)

The development of rocking may be prevented if the babies are left with the mother and in their social group. Rocking after (late) separation may be prevented when transfer takes place together with familiar peers.

Year Published: 1994Animal Type: Chimpanzee, Nonhuman Primate

Citation: Spijkerman, R. P., Dienske, H., van Hooff, J. A. R. A. M. et al. 1994. Causes of body rocking in chimpanzees (Pan troglodytes). Animal Welfare 3, 193-211.

Wounding aggression during the formation and maintenance of captive, multimale chimpanzee groups

Based on a 14-year survey of one facility, the incidence of injuries resulting from aggression during and after group formation of chimpanzees is assessed and its managerial implications discussed. There is more wounding and more severe wounding in groups composed...

Year Published: 1995Animal Type: Chimpanzee, Nonhuman Primate

Citation: Alford, P. L., Bloomsmith, M. A., Keeling, M. E. et al. 1995. Wounding aggression during the formation and maintenance of captive, multimale chimpanzee groups. Zoo Biology 14, 347-359.

Chimpanzees in AIDS research: A biomedical and bioethical perspective

The present article represents a consensus view of the appropriate utilization of chimpanzees in AIDS research arrived at as a result of a meeting of a group of scientists involved in AIDS research with chimpanzees and bioethicists. The paper considers...

Year Published: 1994Topics: Disease/Experimental Model, Relocation & Transport, Social Housing & CompanionshipAnimal Type: Chimpanzee, Nonhuman Primate

Citation: van Akker, R., Balls, M., Eichberg, J. W. et al. 1994. Chimpanzees in AIDS research: A biomedical and bioethical perspective. Journal of Medical Primatology 23, 49-51.

Improving the laboratory environment for nonhuman primates

Environmental improvements include construction of large indoor cages that allow pairing of experimental animals, a grass-covered 'playground' for breeding chimpanzee groups, and indoor/outdoor group housing for 'retired' experimental animals. In addition, we provide toys, perches, mirrors, and foraging devices, and...

Year Published: 1995Topics: Environmental Enrichment, Housing, Rearing & Weaning, ReproductionAnimal Type: Chimpanzee, Nonhuman Primate

Citation: Brent, L. 1995. Improving the laboratory environment for nonhuman primates. Animal Welfare Institute (AWI) Quarterly 44(1), 14-15.

Feeding enrichment and body weight in captive chimpanzees

Regular offering of frozen foods and liquids, grains, dried fruit and foods presented in foraging devices resulted in a body weight increase of female but not of male chimpanzees.

Year Published: 1995Animal Type: Chimpanzee, Nonhuman Primate

Citation: Brent, L. 1995. Feeding enrichment and body weight in captive chimpanzees. Journal of Medical Primatology 24, 12-16.

Effects of predictable versus unpredictable feeding schedules on chimpanzee behavior

These findings indicate that feeding on a more unpredictable schedule may lead to increased species-appropriate behavior [more activity, less abnormal behavior] in group-housed chimpanzees.

Year Published: 1995Animal Type: Chimpanzee, Nonhuman Primate

Citation: Bloomsmith, M. A., Lambeth, S. P. 1995. Effects of predictable versus unpredictable feeding schedules on chimpanzee behavior. Applied Animal Behaviour Science 44, 65-74.

Differences in behavior between chimpanzees housed long-term in individual cages and small groups

Chimpanzees housed in pairs or trios showed fewer signs of tension, anxiety and aggressiveness than those housed singly.

Year Published: 1995Animal Type: Chimpanzee, Nonhuman Primate

Citation: Baker, K. C. 1995. Differences in behavior between chimpanzees housed long-term in individual cages and small groups. American Journal of Primatology 36, 106 (Abstract).

The chimps of Chimfunshi

Report about David and Sheila Siddle's sanctuary for 43 rehabilitated chimpanzees in Zambia. All the experts said it wouldn't work. We didn't know if it would or not, be we knew we had to try. ... Now they're calling us...

Year Published: 1995Animal Type: Chimpanzee, Nonhuman Primate

Citation: Lemmon, T., Hobbs, G. 1995. The chimps of Chimfunshi. Africa 3(2), 36-45.

Shredded paper as enrichment for infant chimpanzees

Shredded paper was scattered throughout the room with the [group-housed] infants present on Monday morning and was removed on Friday afternoon. During a four-week study period shredded paper had limited effects on the chimpanzees' behavior, although it encouraged more independent...

Year Published: 1995Topics: Environmental EnrichmentAnimal Type: Chimpanzee, Nonhuman Primate

Citation: Kessel, A. L., Brent, L., Walljasper, T. 1995. Shredded paper as enrichment for infant chimpanzees. Laboratory Primate Newsletter 34(4), 4-6.

Behavioral changes in Lisbon Zoo chimpanzees after social housing*

The provision of manipulable objects [plastic brick, items of clothing] led to a reduction of self-directed behavior. It is suggested that manipulable materials can work as 'ice-breakers' for social interaction.

Year Published: 1995Animal Type: Chimpanzee, Nonhuman Primate

Citation: Gaspar, A. D. 1995. Behavioral changes in Lisbon Zoo chimpanzees after social housing*. ChimpanZoo Conference Proceedings, 45-50.