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  1. Hair plucking in captive bonobos ( Pan paniscus)

    Contributor(s):: Brand, C. M., Marchant, L. F.

    Both wild and captive studies of grooming in non-human primates emphasize the adaptive role of this behavior. Indeed, social grooming is frequently characterized as "social glue" in the life of primates. Grooming behavior is studied to reveal dominance, kin relations, and social networks. Many...

  2. Inter-group variation in abnormal behaviour in chimpanzees ( Pan troglodytes ) and rhesus macaques ( Macaca mulatta )

    Contributor(s):: Hook, M. A., Lambeth, S. P., Perlman, J. E., Stavisky, R., Bloomsmith, M. A., Schapiro, S. J.

    The present study was designed to explore whether abnormal behaviour patterns in captive chimpanzees and rhesus macaques can provide additional data relevant to the question of social transmission of behaviour in non-human primates. The degrees to which various abnormal behaviours were displayed...

  3. Is interactive technology a relevant and effective enrichment for captive great apes?

    Contributor(s):: Kim-McCormack, Nicky N. E., Smith, Carolynn L., Behie, Alison M.

  4. Making inferences about the location of hidden food: Social dog, causal ape

    Contributor(s):: Bräuer, Juliane, Kaminski, Juliane, Riedel, Julia, Call, Josep, Tomasello, Michael

  5. Maternal response to mother-offspring separation in the chimpanzee ( Pan troglodytes )

    Contributor(s):: Bloomsmith, M. A., Tarou, L. R., Lambeth, S. P., Haberstroh, M. D.

    For management and/or research purposes, chimpanzee mothers and their offspring are often physically separated from one another at an earlier age than they would be in the wild. Studies of the behavioural and physiological effects of mother-infant separation on infant behaviour have been...

  6. Naturalistic exhibits may be more effective than traditional exhibits at improving zoo-visitor attitudes toward African apes

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

    Zoos play a unique role in wildlife conservation, particularly in the area of conservation education. Because of their popularity and flagship status for broader conservation issues, great apes may prove to be one of the most important educational conduits in zoos. In 2002, we surveyed knowledge...

  7. Note on effects of a daylong feeding enrichment program for Chimpanzees ( Pan troglodytes )

    Contributor(s):: Morimura, N.

    For captive chimpanzees, daylong feeding enrichment, offering longer feeding times as comparable to those of their wild counterparts, is expected to alleviate undesirable behavior. This study is designed to determine whether longer feeding opportunities over the course of a day would directly...

  8. Positive reinforcement training as a technique to alter nonhuman primate behavior: quantitative assessments of effectiveness. (Training Nonhuman Primates Using Positive Reinforcement Techniques)

    Contributor(s):: Schapiro, S. J., Bloomsmith, M. A., Laule, G. E.

    Many suggest that operant conditioning techniques can be applied successfully to improve the behavioral management of nonhuman primates in research settings. However, relatively little empirical data exist to support this claim. This article is a review of several studies that discussed applied...

  9. Preliminary comparisons of male/male interactions within bachelor and breeding groups of western lowland gorillas ( Gorilla gorilla gorilla ). (Special issue: Primates in zoos)

    Contributor(s):: Pullen, P. K.

    The establishment of bachelor groups of western lowland gorillas (Gorilla gorilla gorilla) in captivity was considered to be a necessary husbandry step in response to growing concern within the European and North American cooperative breeding programmes that breeding situations are limited...

  10. Primate behavior studies: essential to primate welfare. Proceedings of the special Animal Behavior Society session, 2006

    Contributor(s):: Koch, V. W.

    This special issue contains 8 papers and 3 commentaries on the association between understanding nonhuman primate behaviour and providing for nonhuman primate welfare. The topics of the papers include: welfare of apes in captive environments; social housing for nonhuman primates in the research...

  11. Primiparous chimpanzee mothers: behavior and success in a short-term assessment of infant rearing

    Contributor(s):: Bloomsmith, M. A., Kuhar, C., Baker, K., Lambeth, S., Brent, L., Ross, S. R., Fritz, J.

    Assessing the maternal competence of a first time chimpanzee mother can be difficult. Managers will often attempt to leave infants with their mothers as long as possible in an effort to provide the infant with natural maternal care, as well as give the mother some maternal experience. However if...

  12. Psychopathology in great apes: concepts, treatment options and possible homologies to human psychiatric disorders

    Contributor(s):: Brune, M., Brune-Cohrs, U., McGrew, W. C., Preuschoft, S.

  13. Salivary cortisol and behaviour in an all-male group of western lowland gorillas ( Gorilla g. gorilla )

    Contributor(s):: Kuhar, C. W., Bettinger, T. L., Laudenslager, M. L.

    While the use of salivary cortisol as an index of hypothalamic-pituitary-adrenal (HPA) axis activation has increased rapidly in human studies, few non-human primate studies have used saliva samples. Nearly 300 h of behavioural data and over 400 saliva samples were collected from three young...

  14. Social behavior in a group of Orang-Utans ( Pongo pygmaeus abelii ) in a zoo setting

    Contributor(s):: Tobach, E., Greenberg, G., Radell, P., McCarthy, T.

  15. Space use as an indicator of enclosure appropriateness: a novel measure of captive animal welfare

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

    Empirical measures of animal behavior and space use within the captive environment can provide critical information about animals' requirements, preferences and internal states. The trend toward naturalistic environments has shown promise in terms of behavioral benefits for animals such as great...

  16. Systematic investigation of the stability of food preferences in captive orangutans: implications for positive reinforcement training

    Contributor(s):: Clay, A. W., Bloomsmith, M. A., Marr, M. J., Maple, T. L.

    Using preference-assessment tests with humans in conjunction with behavioral modification sessions has been a regular component of almost all operant conditioning programs with mentally challenged humans. This has been very effective in improving the efficiency of behavioral training in these...

  17. The choice to access outdoor areas affects the behavior of great apes

    Contributor(s):: Kurtycz, L. M., Wagner, K. E., Ross, S. R.

    Outdoor access is often cited as a critical component of appropriate housing for great apes in captivity, and although studies have shown that offering primates choices can improve welfare, choice to access specific areas has been empirically neglected. Behavioral data were collected on...

  18. The domestication of social cognition in dogs

    Contributor(s):: Hare, B., Brown, M., Williamson, C., Tomasello, M.

    Dogs are more skillful than great apes at a number of tasks in which they must read human communicative signals indicating the location of hidden food. In this study, we found that wolves who were raised by humans do not show these same skills, whereas domestic dog puppies only a few weeks old,...

  19. The effect of a new vertical structure in mitigating aggressive behaviour in a large group of chimpanzees ( Pan troglodytes )

    Contributor(s):: Caws, C. E., Wehnelt, S., Aureli, F.

    The availability and complexity of escape routes are key aspects in modulating aggression. The effect of increased vertical space on the occurrence and severity of aggression was studied in a large group of chimpanzees (Pan troglodytes). Fifty wooden poles were added to the outdoor enclosure at...

  20. The effect of a short-term biomedical research protocol on stereotyped rocking in young chimpanzees

    Contributor(s):: Pazol, K. A., Bloomsmith, M. A.