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  1. Causes of body rocking in chimpanzees ( Pan troglodytes )

    Contributor(s):: Spijkerman, R. P., Dienske, H., Hooff, J. A. R. A. M. van, Jens, W.

  2. Chimpanzee ( Pan troglodytes ) responses to caregiver use of chimpanzee behaviors

    Contributor(s):: Jensvold, M. L. A.

    The relationships between captive primates and their caregivers are critical ones and can affect animal welfare. Friendly relationships can improve quality of life; adversely, agonistic relationships can decrease quality of life. Caregivers in and of themselves should not be stressful to their...

  3. Combination therapy reduces self-injurious behavior in a chimpanzee ( Pan troglodytes troglodytes ): a case report

    Contributor(s):: Bourgeois, S. R., Vazquez, M., Brasky, K.

    Self-injurious behavior (SIB) remains a severe and intractable abnormal behavior for nonhuman primates in diverse settings and is a significant concern for veterinarians and behavioral scientists. To date, no single pharmacological, behavioral, social, or environmental intervention method has...

  4. Computer-assisted enrichment for zoo-housed orangutans ( Pongo pygmaeus )

    Contributor(s):: Tarou, L. R., Kuhar, C. W., Adcock, D., Bloomsmith, M. A., Maple, T. L.

    The study of environmental enrichment has identified a variety of effective forms of enrichment, but there are widespread problems associated with their use. Few forms of enrichment are cognitively challenging, and even the most effective often result in rapid habituation. This study examined the...

  5. Conflict and reconciliation behavior trends of the bottlenose dolphin ( Tursiops truncatus )

    Contributor(s):: Holobinko, A., Waring, G. H.

    Wild bottlenose dolphin (Tursiops truncatus) populations display societal structures characterized by numerous and frequent changes in group composition, complex social relationships, and high levels of cooperation, attributes also observed in human and nonhuman primate cultures. Maintaining...

  6. Developing Children's Ability to Recognize Animal Emotions -- What Does It Take? A Study at the Zoo

    Full-text: Available

    Contributor(s):: Silvia Rochaw, Augusta Gaspar, Francisco Esteves

    Several factors are known to affect children's identification of human emotions, but information is virtually inexistent regarding how they develop their ability to identify animal emotions. I this study we approached factors likely to influence children's identification of animal...

  7. Do gorillas regurgitate potentially-injurious stomach acid during 'regurgitation and reingestion?'

    Contributor(s):: Hill, S. P.

    Regurgitation and reingestion (R/R) of foodstuffs is a common abnormal behaviour in captive western lowland gorillas (Gorilla gorilla gorilla) and certain other non-human primates, but it is not part of their normal feeding mechanism. It is similar to a behavioural problem seen in humans, human...

  8. Domesticated dogs ( Canis familiaris ) react to what others can and cannot hear

    Contributor(s):: Kundey, S. M. A., Reyes, A. de los, Taglang, C., Allen, R., Molina, S., Royer, E., German, R.

    Recent research suggests some nonhuman primates (e.g., chimpanzees, rhesus macaques) consider what others hear when acting in competitive situations. We explored whether dogs living in private homes or sourced from an animal shelter would show this same predilection. Following an inhibition task...

  9. Early life experiences: activity levels and abnormal behaviours in resocialised chimpanzees

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

    Chimpanzees (Pan troglodytes) that are kept in captivity come from a wide variety of backgrounds and a proportion of them have been subjected to maternal separation and social deprivation during development. The long-term effects of such practices have received little investigation. This study...

  10. Effect of enclosure size and complexity on the behaviors of captive chimpanzees ( Pan troglodytes )

    Contributor(s):: Jensvold, M. L. A., Sanz, C. M., Fouts, R. S., Fouts, D. H.

    Reports describing the implementation of innovative facility designs are important to both the primate caregiving community and policymakers reviewing current U.S. Department of Agriculture regulations. This study documents the changes in behaviour of 5 adult chimpanzees that coincided with...

  11. Effects of browse, human visitors and noise on the behaviour of captive orangutans

    Contributor(s):: Birke, L.

    This paper reports a study of the behaviour of captive orangutans (Pongo pygmaeus) at Chester Zoo, UK [date not given]. The study addressed two questions: what is the effect of the presence of fresh browse on the animals' behaviour and what is the effect of the presence of visitors? The first...

  12. Effects of predictable versus unpredictable feeding schedules on chimpanzee behavior

    Contributor(s):: Bloomsmith, M. A., Lambeth, S. P.

    The effects of predictable and a variable feeding schedule on physiological wellbeing was determined in 30 adult or adolescent chimpanzees (Pan troglodytes) living in 4 different social groups. Feeding practices were changed to a more unpredictable schedule for 2 groups, 5 or 6 months before the...

  13. Effects of short- and long-term changes in spatial density on the social behaviour of captive chimpanzees ( Pan troglodytes )

    Contributor(s):: Videan, E. N., Fritz, J.

    The constraints of captivity may often require non-human primates to experience restrictions in space for both long- and short-term periods of time. The tension-reduction model predicts that great apes should increase affiliative behaviours and decrease aggressive behaviours as a coping strategy....

  14. Emotional consequences when chimpanzees ( Pan troglodytes ) face challenges: individual differences in self-directed behaviours during cognitive tasks

    Contributor(s):: Yamanashi, Y., Matsuzawa, T.

    Self-directed behaviours (SDBs) are said to be indicative of negative emotions. The present study focused on chimpanzees' SDBs during cognitive experiments in order to investigate how each chimpanzee reacted to his or her errors and to changes in task difficulty. We recorded and analysed the...

  15. Empathy and donation behavior toward happy and sad chimpanzees

    Full-text: Available

    | Contributor(s):: Nils-Torge Telle, Hans-Radiger Pfister

    Past research indicates a moderate but robust relationship between human empathy and empathy toward animals. Further, it has been shown that human empathy is associated with more positive attitudes toward animals. What has not been researched, however, is human- and animal-directed empathy in...

  16. Empty nest: a case study of maternal response to separation from a juvenile offspring in a captive sumatran orangutan ( Pongo pygmaeus abelii )

    | Contributor(s):: Tarou, L. R., Bashaw, M. J., Maple, T. L.

    Improving the welfare of captive nonhuman primates requires evaluating the stressors created by the captive environment and reducing their negative effects. Social separation, although sometimes necessary for managing the genetic diversity of captive populations of animals, causes both...

  17. Gorilla behavior in response to systematic alternation between zoo enclosures

    | Contributor(s):: Lukas, K. E., Hoff, M. P., Maple, T. L.

  18. Gorilla Behavior Index revisited: age, housing and behavior

    | Contributor(s):: Kuhar, C. W., Stoinski, T. S., Lukas, K. E., Maple, T. L.

    While personality and temperament assessments are becoming more common in animal science as a means for predicting behavior patterns, they are virtually unstudied in exotic animals outside of chimpanzees. We assessed behavioral profiles of 119 male gorillas using the Gorilla Behavior Index (GBI)...

  19. Great ape cognition and captive care: Can cognitive challenges enhance well-being?

    | Contributor(s):: Clark, Fay E.

    Given the close genetic link between humans and nonhuman great apes, the well-being of the latter in captivity is understandably controversial. Behavioural signs of boredom, anxiety and stress in captive great apes have been linked to being reared in small groups or by humans, and by having a...

  20. Group differences in captive gorillas' reaction to large crowds

    | Contributor(s):: Kuhar, C. W.

    The impact of visitor crowd size on captive animal behaviour can be difficult to interpret in many institutions due to the lack of variation in crowd size over short periods of time. In attempts to compare greater variation in crowd size, animal behaviour is often compared over conditions that...