All Publications

Electronic versions of these papers are provided as a professional courtesy to ensure timely dissemination of academic work for individual and noncommercial purposes. Copyright and all rights therein reside with the respective copyright holders, as stated within each paper. These files may not be reposted without permission.


  2013 | Spontaneous triadic engagement in bonobos (Pan paniscus) and chimpanzees (Pan troglodytes). Journal of Comparative Psychology.

  2013 | Chimpanzees and Bonobos Exhibit Emotional Responses to Decision Outcomes. PLoS One.

  2013 | Bonobos share with strangers. PLoS One.

  2013 | Different ontogenetic patterns of testosterone production reflect divergent male reproductive strategies in chimpanzees and bonobos. Physiology & Behavior.

  2013 | Anxiety-related behavior of orphan chimpanzees (Pan troglodytes schweinfurthii) at Gombe National Park, Tanzania. Primates.

  2013 | Reproductive ecology of wild chimpanzees. American Journal of Primatology.

  2013 | Pant hoot chorusing and social bonds in male chimpanzees. Animal Behaviour.

  2013 | First molar eruption, weaning, and life history in living wild chimpanzees. PNAS.

  2013 | Validation of a Field Technique and Characterization of Fecal Glucocorticoid Metabolite Analysis in Wild Chimpanzees (Pan troglodytes). American Journal of Primatology.

  2013 | Gene Flow and Genetic Diversity of Chimpanzees in Tanzanian Habitats. Conservation International.

  2013 | Spontaneous Triadic Engagement in Bonobos (Pan paniscus) and Chimpanzees (Pan troglodytes). Journal of Comparative Psychology.

  2012 | The bonobo genome compared with the chimpanzee and human genomes. Nature.

  2012 | Majority-biased transmission in chimpanzees and human children but not orangutans. Current Biology.

  2012 | Are there geniuses among the apes? Philosophical Transactions of the Royal Society.

  2012 | Education program evaluation at multiple primate sanctuaries in equatorial Africa. International Journal of Primatology.

  2012 | The self-domestication hypothesis: bonobo psychology evolved due to selection against male aggression. Animal Behaviour

  2012 | Communication during sex among female bonobos: effects of dominance, solicitation and audience. Scientific Reports.

  2012 | High Diversity at PRDM9 in Chimpanzees and Bonobos. PloS One

  2012 | Direct and Indirect reputation formation in great apes and human children. Journal of Comparative Psychology.

  2012 | Factors associated with the diversification of the gut microbial communities within chimpanzees from Gombe National Park. Proceedings of National Academy of Science

  2012 | The energetics of lactation and the return to fecundity in wild chimpanzees. Behavioral Ecology.

  2012 | Ecological and social factors affect the occurrence and outcomes of intergroup encounters in chimpanzees. Animal Behaviour

  2012 | Direct observation of generation times in wild apes suggests old divergences in hominid evolution. PNAS.

  2012 | Chimpanzees and humans harbor compositionally similar gut enterotypes. Nature Communications

  2012 | The magnitude and sources of variation in female reproductive performance. 2012. In: Evolution of Primate Societies (Ed. by Mitani, J., Call, J., Kappeler, P., Palombit, R., & Silk, J.). Chicago, IL: University of Chicago Press.

  2012 | Nonkin cooperation: reciprocity, markets and mutualism. In: Evolution of Primate Societies (Ed. by Mitani, J., Call, J., Kappeler, P., Palombit, R., & Silk, J.). Chicago, IL: University of Chicago Press. pp 514-530.

  2012 | Fitness benefits of coalitionary aggression in male chimpanzees. Behavioral Ecology and Sociobiology

  2012 | Seasonal mortality patterns in non-human primates: Implications for variation in selection pressures across environments. Evolution

  2012 | Long-term changes in the ecological factors surrounding the chimpanzees of Gombe National Park. Long Term Changes in Africa's Rift Valley: Impacts on Biodiversity and Ecosystems. A. J. Plumptre. New York, Nova Science Publishers.

  2012 | Adult Cleaner Wrasse Outperform Capuchin Monkeys, Chimpanzees and Orang-utans in a Complex Foraging Task Derived from Cleaner – Client Reef Fish Cooperation

  2012 | Extraversion predicts longer survival in gorillas: an 18-year longitudinal study. Proceedings of the Royal Society B.

  2012 | The Endowment Effect in Orangutans. International Journal of Comparative Psychology.

  2012 | Visitor Effects on the Behavior of Captive Western Lowland Gorillas: The Importance of Individual Differences in Examining Welfare. Zoo Biology.

  2012 | Flexibility and persistence of chimpanzee (Pan troglodytes) foraging behavior in a captive environment.

  2012 | Flexibility and persistence of chimpanzee (Pan troglodytes) foraging behavior in a captive environment. American Journal of Primatology

  2012 | Case Report: Cerebrovascular Accident (Stroke) in Captive, Group-Housed, Female Chimpanzees

  2012 | Balancing Ape Needs and Visitor Needs: The Impact of Modern, Naturalistic Exhibit Design on Visitor Behavior. Visitor Studies.

  2012 | Recent decline in suitable environmental conditions for African great apes. Diversity and Distributions.

  2012 | Hand Preferences for Coordinated Bimanual Actions in 777 Great Apes: Implications for the Evolution of Handedness in Hominids. Journal of Human Evolution.

  2012 | Assessment of adrenocortical activity after ACTH challenge in diverse African wildlife species. International Journal of Animal and Veterinary Advances.

  2011 | The origins of human temperament: children avoid novelty more than other apes. Developmental Science.

  2011 | Bonobos and chimpanzees infer the target of an actor's attention. Animal Behaviour.

  2011 | Chimpanzee and bonobos distinguish between risk and ambiguity. Biology Letters.

  2011 | Psychological Health of Orphan Bonobos and Chimpanzees in African Sanctuaries. PLoS One.

  2011 | Assessing the psychological health of captive and wild apes: a response to Ferdowsian et al. 2011. Journal of Comparative Psychology.

  2011 | Bonobos Fall within the Genomic Variation of Chimpanzees. PLoS ONE.

  2011 | Children but not chimpanzees prefer to collaborate. Current Biology.

  2011 | Predicting capacity demand on sanctuaries for African chimpanzees (Pan troglodytes). International Journal of Primatology.

  2011 | Blood groups in the species survival plan, European endangered species program and managed in situ populations of bonobo (Pan panicus), common chimpanzee (Pan troglodytes), gorilla (Gorilla ssp), and orangutan (Pongo pygmaeus ssp). Zoo Biology.

  2011 | Hand Preferences for bimanual coordination in 77 bonobos (Pan paniscus): replication and extension. International Journal of Primatology,

  2011 | Female bonobos use copulation calls as social signals. Biology Letters.

  2011 | Bonobos extract meaning from call sequences. PloS One

  2011 | The Structure of Bonobo Copulation Calls During Reproductive and Non‐Reproductive Sex. Ethology

  2011 | Bonobo but not chimpanzee infants use socio-sexual contact with peers. Primates

  2011 | Community-specific evaluation of tool affordances in wild chimpanzees. Scientific Reports

  2011 | Managing a speared alpha male chimpanzee (Pan troglodytes) in Kibale National Park, Uganda. Veterinary Record

  2011 | Sexual coercion by male chimpanzees shows that female choice may be more apparent than real. Behavioral Ecology and Sociobiology

  2011 | Comparative feeding ecology of two chimpanzee communities in Kibale National Park, Uganda. International Journal of Primatology

  2011 | Low Demographic Variability in Wild Primate Populations: Fitness Impacts of Variation, Covariation, and Serial Correlation in Vital Rates. Am. Nat

  2011 | Aging in the natural world: Comparative data reveal similar mortality patterns across primates. Science

  2011 | A retrospective analysis of factors correlated to chimpanzee (Pan troglodytes schweinfurthii) respiratory health at Gombe National Park. Ecohealth.

  2011 | Orangutans do not form expectations based on their partner‘s outcomes. Folia Primatologica.

  2011 | Science on exhibit: The influence of an on-exhibit touchscreen on orangutans and zoo visitors.

  2011 | Specific Image Characteristics Influence Attitudes about Chimpanzee Conservation and Use as Pets. PLoS ONE.

  2011 | Predicting Capacity Demand on African Chimpanzee Sanctuaries.

  2011 | Transfer and acclimation effects on the behavior of two species of African great apes moved to a novel and naturalistic zoo environment.

  2011 | Validation of cortisol enzyme immunoassay and characterization of salivary cortisol circadian rhythm in chimpanzees (Pan troglodytes). American Journal of Primatology.

  2011 | Space use selectivity by chimpanzees and gorillas in an indoor-outdoor enclosure. American Journal of Primatology.

  2011 | Transfer and acclimatization effects on the behavior of two species of African great ape moved to a novel and naturalistic zoo environment. International Journal of Primatology.

  2011 | Elemental variation in the termite fishing of wild chimpanzees (Pan troglodytes). Biology Letters.

  2010 | Differences in the Cognitive Skills of Bonobos and Chimpanzees. PLoS One.

  2010 | Cognition in chimpanzees and children has different factor structure. Psychological Science.

  2010 | Bonobos voluntarily share their own food with others. Current Biology.

  2010 | Evidence for delayed development of social behavior and cognition in bonobos relative to chimpanzees. Current Biology.

  2010 | Reaching around barriers: The performance of great apes and 3- to 5-year-old children on an inhibitory control task. Animal Cognition.

  2010 | Decision-making across social contexts: competition increases risk-prone choices in chimpanzees and bonobos. Animal Behaviour.

  2010 | Differential reactivity of steroid hormones in chimpanzees and bonobos when anticipating food competition. Proceedings of the National Academy of Sciences.

  2010 | Cognition in chimpanzees and children has different factor structure. Psychological Science.

  2010 | The ape’s edge: positional learning in chimpanzees and humans. Animal Cognition.

  2010 | Bonobo Handshake: a Memoir of Love and Adventure in the Congo. Gotham Books.

  2010 | A comparison of bonobo and chimpanzee tool use: evidence for a female bias in the Pan lineage. Animal Behaviour.

  2010 | On the diversity of malaria parasites in African apes and the origin of Plasmodium falciparum from Bonobos. PLoS Pathogens

  2010 | Encephalomyocarditis virus mortality in semi-wild bonobos (Pan panicus). Journal of Medical Primatology.

  2010 | Encephalomyocarditis virus mortality in semi-wild bonobos (Pan panicus). Journal of Medical Primatology

  2010 | A direct comparison of scan and focal sampling methods for measuring wild chimpanzee feeding behaviour. Folia Primatologica

  2010 | Sex differences in chimpanzees’ use of sticks as play objects resemble those of children. Current Biology

  2010 | Comparisons of limb structural properties in free-ranging chimpanzees from Kibale, Gombe, Mahale and Tai communities. In: KD’Aout and EE Vereecke (Eds), Primate Locomotion: Linking Field and Laboratory Research. New York: Springer.

  2010 | Dynamics of social and ecological stress in wild female chimpanzees. Hormones and Behavior

  2010 | No evidence of short-term exchange of meat for sex among chimpanzees. Journal of Human Evolution

  2010 | The role of intelligence in group hunting: Are chimpanzees different from other social predators? In: EV Lonsdorf, SR Ross, T Matsuzawa (Eds.), The Mind of the Chimpanzee: Ecological and Experimental Perspectives.

  2010 | Genetic and ‘cultural’ similarity in wild chimpanzees. Proceedings of the Royal Society of London Series B: Biological Sciences

  2010 | Phenotypic quality influences fertility in Gombe chimpanzees. Journal of Animal Ecology

  2010 | The Primate Life History Database: a unique shared ecological data resource. Methods in Ecology & Evolution

  2010 | Demographic and Ecological Effects on Patterns of Parasitism in Eastern Chimpanzees (Pan troglodytes schweinfurthii) in Gombe National Park, Tanzania. American Journal of Physical Anthropology

  2010 | Impact of Simian Immunodeficiency Virus Infection on Chimpanzee Population Dynamics. PLoS Pathogens.

  2010 | The role of intelligence in group hunting: Are chimpanzees different from other social predators? In: The Mind of the Chimpanzee: Ecological and Experimental Perspectives (Ed. by Lonsdorf, E. V., Ross, S. R. & Matsuzawa, T.)

  2010 | Observational learning in orangutan cultural transmission trains. Biology Letters.

  2010 | Demographic and Ecological Affects on Patterns of Parasitism in Eastern Chimpanzees (Pan troglodytes schweinfurthii) in Gombe National Park, Tanzania. American Journal of Physical Anthropology.

  2010 | A Legacy of Low-Impact Logging does not Elevate Prevalence of Potentially Pathogenic Protozoa in Free-Ranging Gorillas and Chimpanzees in the Republic of Congo: Logging and Parasitism in African Apes. EcoHealth.

  2010 | Origin of the human malaria parasite Plasmodium falciparum in western gorillas (Gorilla gorilla). Nature.

  2010 | Opportunities and constraints when studying social learning: developmental approaches and social factors. Learning and Behavior.

  2010 | Captive gorillas are right-handed for bimanual feeding. American Journal of Physical Anthropology.

  2010 | Molecular Epidemiology of Simian Immunodeficiency Virus Infection in Wild-Living Gorillas. Journal of Virology.

  2010 | Visual kin recognition in nonhuman primates: inbreeding avoidance or male distinctiveness. Journal of Comparative Psychology.

  2010 | Preliminary assessment of methods used to demonstrate nut cracking behavior to five captive chimpanzees (Pan troglodytes). Folia Primatologica.

  2010 | Differential ape behavior in two alternating environments: Comparing behavior in exhibit and short-term holding spaces. American Journal of Primatology.

  2010 | A summary of recommendations for primate conservation education. American Journal of Primatology.

  2010 | Chimpanzees prey on army ants with specialized tool set. American Journal of Primatology.

  2009 | Chimpanzees negotiate in a bargaining game. Evolution and Human Behaviour.

  2009 | Divergent spatial memory development in chimpanzees and bonobos. Developmental Science.

  2009 | Bonobos have more human-like second-to-fourth finger length ratio (2D:4D) than chimpanzees: a hypothesized indication of lower prenatal androgens. Journal of Human Evolution.

  2009 | Testing the social dog hypothesis: are dogs also more skilled than chimpanzees in non-communicative social tasks? Behavioral Processes.

  2009 | Shallow-water habitats as sources of fallback foods for hominins. American Journal of Physical Anthropology

  2009 | Placental retention in a bonobo (Pan paniscus). Journal of Medical Primatology.

  2009 | Chimpanzees negotiate in a bargaining game. Evolution and Human Behaviour.

  2009 | Wild chimpanzees rely on cultural knowledge to solve an experimental honey acquisition task. Current Biology

  2009 | The context of female dispersal in Kanyawara chimpanzees. Behaviour

  2009 | Male aggression against females and sexual coercion in chimpanzees. In: MN Muller and RW Wrangham (Eds.), Sexual Coercion in Primates: An Evolutionary Perspective on Male Aggression Against Females.

  2009 | Urinary C-peptide tracks seasonal and individual variation in energy balance in wild chimpanzees. Hormones and Behavior

  2009 | Alpha male chimpanzee grooming patterns: implications for dominance ‘style’. American Journal of Primatology

  2009 | Male dominance rank and reproductive success in chimpanzees (Pan troglodytes schweinfurthii). Animal Behaviour

  2009 | Increased Mortality and AIDS-like Immunopathology in Wild Chimpanzees Infected with SIVcpz. Nature.

  2009 | Reproductive energetics in free-living female chimpanzees (Pan troglodytes schweinfurthii). Behavioral Ecology

  2009 | Novel circular DNA viruses in stool samples of wild-living chimpanzees. Journal of General Virology

  2009 | The meat-scrap hypothesis: small quantities of meat may promote cooperative hunting in wild chimpanzees. Behavioral Ecology and Sociobiology

  2009 | Sexual behavior in female western lowland gorillas: Preliminary evidence for sexual competition. American Journal of Primatology.

  2009 | An experimental, comparative investigation of social learning in chimpanzees and gorillas: the influence of social tolerance.

  2009 | An experimental, comparative investigation of tool use in chimpanzees and gorillas. Animal Behaviour.

  2009 | Reproductive energetics in free-living female chimpanzees (Pan troglodytes). Behavioral Ecology.

  2009 | Sequential list-learning by an adolescent lowland gorilla (Gorilla gorilla gorilla) using an infrared touchframe apparatus. Interaction Studies.

  2009 | Influences on visitor behavior at a modern immersive zoo exhibit. Zoo Biology.

  2009 | Wounding patterns in adolescent male chimpanzees: management and welfare implications. Zoo Biology.

  2009 | Interactions Between Zoo-Housed Great Apes and Local Wildlife. American Journal of Primatology.

  2009 | Space use as an indicator of enclosure appropriateness: A novel measure of captive animal welfare. Applied Animal Behaviour Science.

  2009 | Flexible and Persistent Tool-using Strategies in Honey-gathering by Wild Chimpanzees. International Journal of Primatology.

  2009 | Design complexity in termite-fishing tools of chimpanzees (Pan troglodytes). Biology Letters.

  2008 | Great apes (Pan troglodytes, Pan paniscus, gorilla gorilla, Pongo pygmaeus) understanding of tool functional properties after limited experience. Journal of Comparative Psychology.

  2008 | Great apes prefer cooked foods. Journal of Human Evolution.

  2008 | The conservation value of Lola ya Bonobo Sanctuary. In: Bonobos Revisited. Springer Press.

  2008 | A fruit in the hand or two in the bush? Ecological pressures select for divergent risk preferences in chimpanzees and bonobos. Biology Letters.

  2008 | Do chimpanzees reciprocate received favors? Animal Behaviour.

  2008 | Skeletal pathology in Pan troglodytes schweinfurthii in Kibale National Park, Uganda. American Journal of Physical Anthropology

  2008 | Diet and reproductive function in wild female chimpanzees (Pan troglodytes schweinfurthii) at Kibale National Park, Uganda. American Journal of Physical Anthropology

  2008 | Male mating interest varies with female fecundity in chimpanzees. International Journal of Primatology

  2008 | Association patterns among wild chimpanzees (Pan troglodytes schweinfurthii) reflect sex differences in cooperation. Behavioral Ecology and Sociobiology

  2008 | Economic profitability of social predation among wild chimpanzees: individual variation promotes cooperation. Animal Behaviour

  2008 | Female competition over core areas among Kanyawara chimpanzees, Kibale National Park, Uganda. International Journal of Primatology

  2008 | Immigration costs for female chimpanzees and male protection as an immigrant counterstrategy to intrasexual aggression. Animal Behaviour

  2008 | Community benefits from long-term research programs: a case study from Kibale National Park. In: RW Wrangham, E Ross (Eds.), Science and Conservation in African Forests: The Benefits of Longterm Research.

  2008 | Long-term perspectives on forest conservation: lessons from research in Kibale National Park. In: RW Wrangham, E Ross (Eds.), Science and Conservation in African Forests: The Benefits of Longterm Research.

  2008 | Female mate preferences among chimpanzees (Pan troglodytes schweinfurthii) of Kanyawara, Kibale National Park . International Journal of Primatology

  2008 | Science and Conservation in African Forests: The Benefits of Longterm Research. Cambridge University Press, 280 pp.

  2008 | Long-term research and conservation: the way forward. In: RW Wrangham, E Ross (Eds.), Science and Conservation in African Forests: The Benefits of Longterm Research. Cambridge University Press, pp. 242-245.

  2008 | Severe aggression among female chimpanzees at Gombe National Park, Tanzania. International Journal of Primatology

  2008 | Human impacts, disease risk, and population dynamics in the chimpanzees of Gombe National Park, Tanzania. American Journal of Primatology

  2008 | Causes of mortality in chimpanzees at Gombe National Park, Tanzania. American Journal of Primatology

  2008 | Molecular ecology and natural history of simian foamy virus infection in wild-living chimpanzees. PLoS Pathogens

  2008 | Hyperprogesteronemia in Response to Vitex fischeri Consumption in Wild Chimpanzees (Pan troglodytes schweinfurthii). American Journal of Primatology

  2008 | Inappropriate Use and Portrayal of Chimpanzees. Science.

  2008 | A science-based approach to managing disease risks for ape conservation. American Journal of Primatology.

  2008 | Chimpanzee (Pan troglodytes) birth patterns and human presence in zoological settings. American Journal of Primatology.

  2008 | Causes of death in the Kasekela chimpanzees of Gombe National Park, Tanzania. American Journal of Primatology.

  2007 | Spontaneous altruism by chimpanzees and children. PLoS Biology.

  2007 | Tolerance allows bonobos to outperform chimpanzees in a cooperative task. Current Biology.

  2007 | The cultural intelligence hypothesis: humans evolved specialized skills of social cognition. Science

  2007 | The perception of rational, goal directed action in nonhuman primates.Science.

  2007 | Bonobos at the “Lola ya Bonobo” sanctuary in the Democratic Republic of Congo. Pan Africa News.

  2007 | Social games between bonobos and humans: Evidence for shared intentionality? American Journal of Primatology.

  2007 | Spontaneous altruism by chimpanzees and children. Public Library of Science: Biology.

  2007 | The origins of human patience. Current Biology.

  2007 | Male chimpanzees exchange political support for mating opportunities. Current Biology

  2007 | Core area quality is associated with variance in reproductive success in chimpanzees at Kanyawara, Kibale National Park. Animal Behaviour

  2007 | Aging and fertility patterns in wild chimpanzees provide insights into the evolution of menopause. Current Biology

  2007 | Risk-prone hunting by chimpanzees (Pan troglodytes schweinfurthii) increases during periods of high diet quality. Behavioral Ecology and Sociobiology

  2007 | Intratree variation in fruit production and implications for primate foraging. International Journal of Primatology

  2007 | The genetic signature of sex-biased migration in patrilocal chimpanzees and humans. PLoS ONE

  2007 | Male coercion and the costs of promiscuous mating for females chimpanzees. Proceedings of the Royal Society B: Biological Sciences

  2007 | Nonlinear acoustics in the pant hoots of common chimpanzees (Pan troglodytes): vocalizing at the edge. Journal of the Acoustical Society of America

  2007 | Chimpanzees Pan troglodytes modify grouping and vocal behaviour in response to location-specific risk. Behaviour

  2007 | Use of overlap zones in group-living primates: a test of the risk hypothesis. Behaviour

  2007 | The contribution of long-term research at Gombe National Park to chimpanzee conservation. Conservation Biology

  2007 | Method for assigning categorical rank in female Pan troglodytes schweinfurthii via the frequency of approaches. International Journal of Primatology

  2007 | New case of intragroup infanticide in the chimpanzees of Gombe National Park. International Journal of Primatology

  2007 | Generation of infectious molecular clones of simian immunodeficiency virus from fecal population sequences of wild-living chimpanzees. Journal of Virology

  2007 | Adult male chimpanzees inherit maternal ranging patterns. Current Biology

  2007 | Relative numerousness judgment and summation in young, middle-aged, and older adult orangutans. Journal of Comparative Psychology.

  2007 | Group size: Determinants in the wild and implications for group housing of wild mammals in zoos. Applied Animal Behavior Science.

  2007 | The Role of Behavioral Research in the Conservation of Chimpanzees and Gorillas. Journal of Applied Animal Welfare Science.

  2007 | Assessment of reproductive behavior and hormonal cycles in geriatric Western Lowland gorillas. Zoo Biology.

  2007 | Assessing the welfare implications of visitors in a zoo setting: A comment on Wells. Applied Animal Behaviour Science.

  2007 | Distinguishing between the nests of sympatric chimpanzees and gorillas. Journal of Applied Ecology.

  2007 | Chimpanzee tool technology in the Goualougo Triangle, Republic of Congo. Journal of Human Evolution.

  2007 | Potential for Ebola transmission between gorilla and chimpanzee social groups. American Naturalist.

  2006 | Chimpanzees recruit the best collaborators. Science.

  2006 | Are chimpanzees spiteful or altruistic when sharing food? Proceedings of the Royal Society B.

  2006 | Engineering chimpanzee cooperation: social tolerance constrains cooperation. Animal Behaviour.

  2006 | Chimpanzees deceive a human by hiding. Cognition.

  2006 | Energy intake by wild chimpanzees and orangutans: methodological considerations and a preliminary comparison. In: G Hohmann, MM Robbins, C Boesch (Eds.), Feeding Ecology in Apes and Other Primates.

  2006 | Comparison of sex differences in gregariousness in fission-fusion species: reducing bias by standardizing for party size. In: NE Newton-Fisher, H Notman, V Reynolds, and J Paterson, Primates of Western Uganda. New York, Springer, pp.209-226.

  2006 | Urinary estrone conjugates and reproductive parameters in Kibale (Kanyawara) and Budongo (Sonso) chimpanzees. In: NE Newton-Fisher, H Notman, V Reynolds, and J Paterson, Primates of Western Uganda. New York, Springer, pp. 227-246.

  2006 | Diversity of items of low nutritional value ingested by chimpanzees from Kanyawara, Kibale National Park, Uganda: an example of the etho-ethnology of chimpanzees. Social Science Information

  2006 | Bioactive properties of plant species ingested by chimpanzees (Pan troglodytes schweinfurthii) in the Kibale National Park, Uganda. American Journal of Primatology

  2006 | Why chimpanzee (Pan troglodytes schweinfurthii) mothers are less gregarious than nonmothers and males: the infant safety hypothesis. Behavioral Ecology and Sociobiology

  2006 | Ontogeny of ranging in wild chimpanzees. International Journal of Primatology

  2006 | Lethal intergroup aggression by chimpanzees in Kibale National Park, Uganda. American Journal of Primatology

  2006 | Comparative rates of violence in chimpanzees and humans. Primates

  2006 | Meat sharing among the Gombe chimpanzees: Harassment and reciprocal exchange. Animal Behaviour

  2006 | Ecological and social influences on the hunting behaviour of wild chimpanzees (Pan troglodytes schweinfurthii). Animal Behaviour

  2006 | The role of the mother in the acquisition of tool-use skills in wild chimpanzees. Animal Cognition.

  2006 | Using retrospective health data from the Gombe chimpanzee study to inform future monitoring efforts. American Journal of Primatology: Special Topics Issue on Disease Risk Analysis.

  2006 | Foraging strategies as a function of season and rank among wild female chimpanzees (Pan troglodytes). Behavioral Ecology

  2006 | Gorilla behavior index revisited: Age, housing and behavior. Applied Animal Welfare Science.

  2006 | Post conflict behavior in western lowland gorillas. American Journal of Primatology.

  2006 | Differential use of attentional and visual communicative signaling by orangutans (Pongo pygmaeus) and gorillas (Gorilla gorilla) in response to the attentional status of a human. American Journal of Primatology.

  2006 | Personality and subjective well-being in orangutans (Pongo pygmaeus and Pongo abelii). Journal of Personality and Social Psychology.

  2006 | Disease Risk Analysis: A Tool for Primate Conservation Planning and Decision Making. American Journal of Primatology.

  2006 | Use of space in a non-naturalistic environment by chimpanzees (Pan troglodytes) and lowland gorillas (Gorilla gorilla gorilla). Applied Animal Behaviour Science.

  2005 | Fatal inflammatory heart disease in a bonobo. Journal of Medical Primatology

  2005 | Sex differences in the development of termite-fishing skills in wild chimpanzees (Pan troglodytes schweinfurthii) of Gombe National Park, Tanzania. Animal Behaviour.

  2005 | Zoo visitor knowledge and attitudes towards gorillas and chimpanzees. Journal of Environmental Education.

  2004 | Sexual behavior and hormonal estrus cycles in captive aged lowland gorillas (Gorilla gorilla). American Journal of Primatology.

  2004 | Sex differences in learning in chimpanzees. Nature.

  2004 | Maternal influences on infant behavioral development in western lowland gorillas. Advances in Psychology Research.

  2004 | Sex differences in play among western lowland gorilla (Gorilla gorilla gorilla) infants: Implications for adult behavior and social structure. American Journal of Physical Anthropology.

  2003 | Primiparous chimpanzee mothers and their infants: Behavior, interactions, and success. Applied Animal Behavior Science.

  2003 | Comparative Assessment of handedness for a coordinated bimanual task in chimpanzees (Pan), gorillas (Gorilla), and orangutans (Pongo). Journal of Comparative Psychology.

  2003 | Silverback male presence and group stability in gorillas (Gorilla gorilla). Folia Primatologica.

  2002 | Mother-infant interactions in western lowland gorillas (Gorilla gorilla gorilla): Spatial relationships, communication, and opportunities for social learning. Journal of Comparative Psychology.