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  1. Chimpanzees use multiple strategies to limit aggression and stress during spatial density changes

    Contributor(s):: Duncan, Luke Mangaliso, Jones, Megan Anne, van Lierop, Mathew, Pillay, Neville

    The regulation of aggression in captive animals is an important welfare concern. Captive environments typically provide limited space for animals and many species exhibit heightened aggression in response to spatial restriction. However, primates appear to regulate aggression under these...

  2. Behavioral correlates and welfare implications of informal interactions between caretakers and zoo-housed chimpanzees and gorillas

    Contributor(s):: Chelluri, Gita I., Ross, Stephen R., Wagner, Katherine E.

    In captive animal facilities, human staff members are a relevant part of the animals’ social environment in addition to providing care and managing the social group. Structured, predictable interactions and relaxed, spontaneous contacts may all affect the animals’ behavior and well-being, both...

  3. Volunteer experience influences the conclusions of behavioural experiments

    Contributor(s):: Duncan, Luke Mangaliso, Pillay, Neville

    Volunteers offer an inexpensive and rapid means of collecting behavioural data, but their reliability is often overlooked. Past research has suggested that observers that were inexperienced are equally adept at recording behaviour as experienced observers, and inexperience was regarded as being...

  4. Physiological and welfare consequences of transport, relocation, and acclimatization of chimpanzees (Pan troglodytes)

    Contributor(s):: Schapiro, Steven J., Lambeth, Susan P., Jacobsen, Kirsten Rosenmaj, Williams, Lawrence E., Nehete, Bharti N., Nehete, Pramod N.

    Manipulations of the environments of captive nonhuman primates often have welfare consequences to the animals, including behavioral effects, and for certain manipulations, physiological effects as well. The processes of transporting, relocating, and acclimatizing nonhuman primates across...

  5. Chimpanzees with positive welfare are happier, extraverted, and emotionally stable

    Contributor(s):: Robinson, Lauren M., Altschul, Drew M., Wallace, Emma K., Úbeda, Yulán, Llorente, Miquel, Machanda, Zarin, Slocombe, Katie E., Leach, Matthew C., Waran, Natalie K., Weiss, Alexander

    Facilities housing captive animals are full of staff who, every day, interact with the animals under their care. The expertise and familiarity of staff can be used to monitor animal welfare by means of questionnaires. It was the goal of our study to examine the association between chimpanzee (Pan...

  6. Adult-adult social play in captive chimpanzees: Is it indicative of positive animal welfare?

    Contributor(s):: Yamanashi, Yumi, Nogami, Etsuko, Teramoto, Migaku, Morimura, Naruki, Hirata, Satoshi

    Play is sometimes considered as an indicator of positive animal welfare. However, it is not yet sufficiently understood whether or not social play among adults can be considered as such an indicator because it is rare in adult animals. This study investigates the factors that influence social...

  7. Captive Audiences: Interactions Between Visitors and Bonobos at the San Diego Zoo

    Full-text: Available

    | Contributor(s):: Elena Miyoko Carver

    Primate exhibits in American zoological parks, especially those featuring the great apes, are among the most compelling, complex, and popular exhibits for visitors, and are a primary way the American public becomes familiar with our closest living relatives. In this study, I approach the...

  8. Dogs (Canis familiaris), but Not Chimpanzees (Pan troglodytes), Understand Imperative Pointing

    Full-text: Available

    | Contributor(s):: Katharina C. Kirchhofer, Felizitas Zimmermann, Juliane Kaminski, Michael Tomasello

    Chimpanzees routinely follow the gaze of humans to outside targets. However, in most studies using object choice they fail to use communicative gestures (e.g. pointing) to find hidden food. Chimpanzees' failure to do this may be due to several difficulties with this paradigm. They may, for...

  9. The impact of atypical early histories on pet or performer chimpanzees

    Full-text: Available

    | Contributor(s):: Hani D. Freeman, Stephen R. Ross

      It is widely accepted that an animal’s early history, including but not limited to its rearing history, can have a profound impact on later behavior. In the case of captive animals, many studies have used categorical measures such as mother reared or human reared that do not...

  10. Reconsidering coprophagy as an indicator of negative welfare for captive chimpanzees

    | Contributor(s):: Hopper, Lydia M., Freeman, Hani D., Ross, Stephen R.

    For captive chimpanzees, 'abnormal' behaviours include behaviours observed only in captivity (i.e. species-atypical behaviours) and those that are performed at higher rates in captivity compared to in the wild. Both types are used as metrics for evaluating captive primates' welfare....

  11. Is the conduct of medical research on chimpanzees compatible with their rights as a near-human species?

    | Contributor(s):: Prince, AM

  12. 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...

  13. Rehabilitation and socialization of chimpanzees (Pan troglodytes) used for entertainment and as pets: An 8-year study at Fundació Mona

    | Contributor(s):: Llorente, Miquel, Riba, David, Ballesta, Sandra, Feliu, Olga, Rostán, Carles

  14. Chimpanzee tea party: anthropomorphism, orientalism, and colonialism

    | Contributor(s):: Allen, John S.

  15. "Ooo ooo, aah aah" : people, bonobos, and mirrored projections at the zoo

    | Contributor(s):: Shanafelt, Robert

  16. Chimpanzee respiratory disease and visitation rules at Mahale and Gombe National Parks in Tanzania

    | Contributor(s):: Lukasik-Braum, Magdalena

  17. Current state of the chimpanzee pet trade in Sierra Leone

    | Contributor(s):: Kabasawa, Asami

  18. Descriptive epidemiology of fatal respiratory outbreaks and detection of a human-related metapneumovirus in wild chimpanzees (Pan troglodytes) at Mahale Mountains National Park, western Tanazania

    | Contributor(s):: Kaur, Taranjit

  19. In the shadow of man: an exploration of pan-human perspectives in a Catalonian chimpanzee sanctuary

    | Contributor(s):: Alcayna-Stevens, Lys

  20. Inalienable worlds : inter-species relations, perspectives and 'doublethink' in a Catalonian chimpanzee sanctuary

    | Contributor(s):: Alcayna-Stevens, Lys