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  1. A brief note on the effects of novel enrichment on an unwanted behaviour of captive bonobos

    | Contributor(s):: Csatadi, A., Leus, K., Pereboom, J. J. M.

    Animals in captivity may show undesirable behaviour when they are not sufficiently challenged, making it essential for their well-being to provide daily enrichment to zoo animals. Primates need a regular replacement with novel enrichment objects to prevent them from getting bored and look for...

  2. A case study of orangutan and siamang behavior within a mixed-species zoo exhibit

    | Contributor(s):: Pearson, E. L., Davis, J. M., Litchfield, C. A.

    This empirical case study assessed the behavior and welfare of 2 orangutans (Pongo abelii) and 2 siamangs (Symphalangus syndactylus) within a mixed-species zoo exhibit. The study used instantaneous scan-sampling to record behavior, location, and interspecies proximity over 174 hr and...

  3. A case study of primiparous maternal and infant gorilla ( Gorilla gorilla gorilla ) behavior

    | Contributor(s):: Crosby, J. Y., Lukas, K. E.

    A primiparous mother and her infant were subjects of a longitudinal behavioral study at Lincoln Park Zoo in Chicago, Illinois. From November 1998 to November 1999, we collected a total of 100 hr of focal nonhuman animal instantaneous point sampling and all occurrence data on the mother and her...

  4. A note on enrichment for spontaneous tool use by chimpanzees ( Pan troglodytes )

    | Contributor(s):: Morimura, N.

    In the wild, decisions as to "when", "where", and "how" an animal acts are made based on the individual's own choice; in contrast, the behaviour of wild animals in captivity may be under human control. To improve the physical and psychological well-being of captive animals, we should ensure that...

  5. A note on the effect of auditory stimulation on the behaviour and welfare of zoo-housed gorillas

    | Contributor(s):: Wells, D. L., Coleman, D., Challis, M. G.

    Auditory stimulation has long been employed as a form of therapy for humans and animals housed in institutions. Its effect on one of our closest-living relatives, the gorilla, however, is largely unknown. This study explored the effect of auditory stimulation on the behaviour and welfare of six...

  6. A note on the effect of olfactory stimulation on the behaviour and welfare of zoo-housed gorillas

    | Contributor(s):: Wells, D. L., Hepper, P. G., Coleman, D., Challis, M. G.

    Olfactory stimulation has been shown to influence the behaviour of a wide variety of species and is now considered a useful form of environmental enrichment for many captive animals. To date, the effect of odour introduction on the behaviour of primates has been subject to little attention. This...

  7. A note on the influence of visitors on the behaviour and welfare of zoo-housed gorillas

    | Contributor(s):: Wells, D. L.

    Visitors to zoos can be a source of potential stress to some captive-housed primates. To date, the effect of the human audience on the welfare of captive gorillas has been overlooked. This study thus examined the behaviour of six zoo-housed gorillas during periods of both high and low visitor...

  8. A preliminary study of the effects of ecologically relevant sounds on the behaviour of captive lowland gorillas

    | Contributor(s):: Ogden, J. J., Lindburg, D. G., Maple, T. L.

  9. A review of nutritional and motivational factors contributing to the performance of regurgitation and reingestion in captive lowland gorillas ( Gorilla gorilla gorilla )

    | Contributor(s):: Lukas, K. E.

    A review. Regurgitation and reingestion is a common phenomenon in captive lowland gorillas, but it has never been reported in wild populations. Although changes in diet have been shown to reduce the behavior, little is known about the underlying mechanisms that lead to its development and...

  10. A survey of chimpanzees ( Pan troglodytes troglodytes ) and gorillas ( Gorilla gorilla gorilla ) in the selectively logged Ngotto Forest, Central African Republic

    | Contributor(s):: Hicks, T. C., Fouts, R. S., Fouts, D. H.

    Currently, the timber company Industrie Forestiere du Batalimo is selectively logging the Ngotto Forest in the Central African Republic. The forest is home to a population of chimpanzees (Pan troglodytes troglodytes) and gorillas (Gorilla gorilla gorilla) and provides the Bofi-speaking people of...

  11. A survey of the attitudes of stakeholders in the zoo industry towards the husbandry requirements of captive Great Apes

    | Contributor(s):: Fernie, A. C., Tribe, A., Murray, P. J., Lisle, A., Phillips, C. J. C.

  12. An analysis of regurgitation and reingestion in captive chimpanzees

    | Contributor(s):: Baker, K. C., Easley, S. P.

    Regurgitation and reingestion (R/R) is a potentially self-injurious behaviour in nonhuman primates and is a common problem among captive primates. The temporal and contextual distribution of R/R and its relationship to diet were assessed in 13 indoor-housed chimpanzees living in pairs and trios....

  13. Anthropomorphism and anthropocentrism as influences in the quality of life of companion animals

    | Contributor(s):: Bradshaw, J. W. S., Casey, R. A.

    Since animal minds are private, so their perception of their own quality of life (QoL) must be also. Anthropocentrism, the interpretation of reality exclusively in terms of human values and experience, has to be guarded against in any assessment of animal welfare; for domestic pets,...

  14. Anticipation and memory as criteria for special welfare consideration

    | Contributor(s):: Lea, S. E. G.

  15. Assessing the prevalence and characteristics of hair-plucking behaviour in captive western lowland gorillas ( Gorilla gorilla gorilla)

    | Contributor(s):: Less, E. H., Kuhar, C. W., Lukas, K. E.

  16. Behavioral responses of silverback gorillas ( Gorilla gorilla gorilla ) to videos

    | Contributor(s):: Maloney, M. A., Leighty, K. A., Kuhar, C. W., Bettinger, T. L.

    This study examined the impact of video presentations on the behavior of 4 silverback, western lowland gorillas (Gorilla gorilla gorilla). On each of 5 occasions, gorillas viewed 6 types of videos (blue screen, humans, an all-male or mixed-sex group engaged in low activity, and an all-male or...

  17. Benefits of naturalistic free-ranging primate displays and implications for increased human-primate interactions

    | Contributor(s):: Sha, ChihMun, Kabilan, B., Alagappasamy, S., Guha, B.

  18. Benefits of positive human interaction for socially housed chimpanzees

    | Contributor(s):: Baker, K. C.

    Human interaction as environmental enrichment for chimpanzees (Pan troglodytes) and other primates is widely promoted and believed to be of value, but has been subject to little objective evaluation. This study assessed the effects of positive human interaction (eg relaxed treat feeding, playing,...

  19. Benefits of training/playing therapy in a group of captive lowland gorillas ( Gorilla gorilla gorilla )

    | Contributor(s):: Carrasco, L., Colell, M., Calvo, M., Abello, M. T., Velasco, M., Posada, S.

    Animal well-being and enrichment continue to gain importance in the maintenance of primates living in captivity. Positive reinforcement training (PRT) and/or playing interaction have been shown to be effective in improving the well-being of several species of primates. This research study...

  20. Caregiver/orangutan relationships at Auckland Zoo: empathy, friendship, and ethics between species

    | Contributor(s):: Palmer, A., Malone, N., Park, J.

    Drawing on ethnographic, ethological, and historical data, we examined the relationships between orangutans and caregivers at Auckland Zoo. Caregivers displayed high levels of empathy and adjusted their husbandry routines to their interpretations of the orangutans' moods. Caregivers experienced...