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  1. The effects of rearing conditions on grooming and play behaviour in captive chimpanzees

    Contributor(s):: Martin, J. E.

    The effects of maternal and peer separation during infancy and juvenescence on adolescent and adult chimpanzee behaviour were studied. The aim was to provide an insight into the social development of the species and to investigate human influence on this process. Forty-three adolescent and adult...

  2. The influence of a camouflage net barrier on the behaviour, welfare and public perceptions of zoo-housed gorillas

    Contributor(s):: Blaney, E. C., Wells, D. L.

    Visitors to zoos can be a potential source of stress to captive-housed primates, resulting in increased abnormal behaviour and intra-group aggression. Finding a way to screen primates from human visitors may be one method of decreasing stress and enhancing animal welfare. For this study, the...

  3. The influence of rearing on personality ratings of captive chimpanzees ( Pan troglodytes ). (Special issue: Primates in zoos)

    Contributor(s):: Martin, J. E.

    Personality traits of 43 captive chimpanzees (Pan troglodytes) at five zoos in the United Kingdom were assessed. Chimpanzees were categorized into one of three rearing conditions: mother-group-reared (MGR), reared with others but separated from mother (RO), and reared alone for a period of time...

  4. The influence of sex, rearing history, and personality on abnormal behaviour in zoo-housed bonobos (Pan paniscus)

    Contributor(s):: Laméris, Daan W., Staes, Nicky, Salas, Marina, Matthyssen, Steffi, Verspeek, Jonas, Stevens, Jeroen M. G.

  5. The introductory study concerning human-animal relations in Warsaw Zoological Garden - the case of chimpanzee (Pan troglodytes)

    Contributor(s):: Kaleta, T., Tumialis, D., Malodobra, M.

    The behaviour of chimpanzees and zoo visitors directed at each other were observed in Warsaw Zoo, Poland, during September 1999-April 2000 and July-September 2003. The aggressive displays and non-aggressive begging were the main types of behaviour performed by apes. When imitating humans,...

  6. The poor contribution of chimpanzee experiments to biomedical progress

    Contributor(s):: Knight, A.

    Biomedical research on captive chimpanzees incurs substantial nonhuman animal welfare, ethical, and financial costs that advocates claim result in substantial advancements in biomedical knowledge. However, demonstrating minimal contribution toward the advancement of biomedical knowledge...

  7. The Problem of Anthropomorphous Animals: Toward a Posthumanist Ethics

    Contributor(s):: Varsava, N.

  8. The role of behavioral research in the conservation of chimpanzees and gorillas

    Contributor(s):: Lonsdorf, E. V.

    Chimpanzees and gorillas are among man's closest living relatives, sharing most of the human genetic code and having many similarities to humans in anatomy, physiology, and behavior. Like humans, these apes make and use tools and have strong family bonds. Chimpanzees even show population-specific...

  9. Tool use task as environmental enrichment for captive chimpanzees

    Contributor(s):: Celli, M. L., Tomonaga, M., Udono, T., Teramoto, M., Nagano, K.

    Wild chimpanzees spend 50-80% of their time foraging, using tools and other forms of manipulation, while captive chimpanzees cannot. In this study, a device - honey in a bottle to be "fished" with artificial materials - that elicits tool use was presented to six captive chimpanzees housed in...

  10. Use of space in a non-naturalistic environment by chimpanzees ( Pan troglodytes ) and lowland gorillas ( Gorilla gorilla gorilla )

    Contributor(s):: Ross, S. R., Lukas, K. E.

    Chimpanzees and gorillas are the two most common species of great ape in captive facilities in North America. This study examined patterns of space use by 14 gorillas and six chimpanzees housed in similar non-naturalistic environments at Lincoln Park Zoo in Chicago, IL. The location of each...

  11. Visitor effects on anxiety in two captive groups of western lowland gorillas

    Contributor(s):: Carder, G., Semple, S.

    There is growing interest in examining the effects that visitors have on the welfare of zoo primates. Most recently, the importance of evaluating the combined impacts of visitors and management practices on anxiety levels of these animals has been highlighted. Studies that take such an approach...

  12. Welfare of apes in captive environments: comments on, and by, a specific group of apes

    Contributor(s):: Savage-Rumbaugh, S., Wamba, K., Wamba, P., Wamba, N.

    Accurately determining the proper captive environment for apes requires adequately assessing the psychological similarities between apes and humans. Scientists currently believe apes lack mental complexity (Millikan, 2006), raising questions concerning the evolution of human culture from ape-like...