Publications

association between galago thomasi and pan troglodytes schweinfurthii in the kibale national park, uganda.		2003	12778909
foci of endemic simian immunodeficiency virus infection in wild-living eastern chimpanzees (pan troglodytes schweinfurthii).	simian immunodeficiency virus of chimpanzees (sivcpz) is the immediate precursor to human immunodeficiency virus type 1 (hiv-1), yet remarkably, the distribution and prevalence of sivcpz in wild ape populations are unknown. studies of sivcpz infection rates in wild chimpanzees are complicated by the species' endangered status and by its geographic location in remote areas of sub-saharan africa. we have developed sensitive and specific urine and fecal tests for sivcpz antibody and virion rna (vrn ...	2003	12805455
dominance rank and fecal testosterone levels in adult male chimpanzees (pan troglodytes schweinfurthii) at ngogo, kibale national park, uganda.	in an attempt to describe hormone-behavior interactions in a sample of wild male chimpanzees, we quantified testosterone in 67 fecal samples obtained from 22 adult male chimpanzees at ngogo, kibale national park, uganda. a mixed-model methodology that controlled for age-class identified a significant positive association between testosterone levels and dominance rank. the results are consistent with those reported from a separate, smaller chimpanzee community in the same population in a study th ...	2004	15356859
parasitological analyses of the male chimpanzees (pan troglodytes schweinfurthii) at ngogo, kibale national park, uganda.	numerous intestinal parasites identified in populations of wild nonhuman primates can be pathogenic to humans. furthermore, nonhuman primates are susceptible to a variety of human pathogens. because of increasing human encroachment into previously nonimpacted forests, and the potential for disease transmission between human and nonhuman primate populations, further detailed investigations of primate ecological parasitology are warranted. for meaningful comparisons to be made, it is important for ...	2005	15706587
ethnomedicinal and bioactive properties of plants ingested by wild chimpanzees in uganda.	wild chimpanzees eat several plant species claimed by traditional healers to cure diseases. however, the behaviour leading apes to ingest these peculiar species is not clearly understood. some of the items consumed by chimpanzees have low nutritional value, and there is a growing body of evidence suggesting that health might be improved or regulated by such ingestion. observations concerning the diet and the health condition of wild chimpanzees (pan troglodytes schweinfurthii) in the kibale nati ...	2005	15913933
testosterone and energetics in wild chimpanzees (pan troglodytes schweinfurthii).	ovarian function in female hominoids is sensitive to both energy flux and energy balance, resulting in a reduced probability of conception during periods when a successful reproductive outcome is less likely. however, the extent to which energetic factors constrain gonadal function in male hominoids is not clear. we examined the effects of both acute and chronic variation in energy availability on urinary testosterone (t) levels in adult male chimpanzees. acute changes in energy availability, wh ...	2005	15940710
bioactive properties of plant species ingested by chimpanzees (pan troglodytes schweinfurthii) in the kibale national park, uganda.	we measured the biological activities of a selected sample (84 crude extracts) of 24 species eaten by wild chimpanzees (pan troglodytes schweinfurthii) in the kibale national park, western uganda, to assess their potential chemotherapeutic values. antibacterial, antimalarial, and/or antileishmania activities were observed in some crude extracts, and five of these extracts showed a significant cytotoxicity against human tumor cells. active compounds isolated from three plant parts occasionally in ...	2006	16419122
diet and reproductive function in wild female chimpanzees (pan troglodytes schweinfurthii) at kibale national park, uganda.	human female reproductive function is highly sensitive to current energetic condition, indicating adaptation to modulate reproductive effort in accordance with changing ecological conditions that might favor or disfavor the production of offspring. here, we test the hypothesis that reproductive capacity in female chimpanzees is likewise limited by current energetic condition. we used 12 years of data on wild chimpanzees (pan troglodytes schweinfurthii) in the kanyawara community of kibale nation ...	2008	18046778
skeletal pathology in pan troglodytes schweinfurthii in kibale national park, uganda.	the ecological pressures shaping chimpanzee anatomy and behavior are the subject of much discussion in primatology and paleoanthropology, yet empirical data on fundamental parameters including body size, morbidity, and mortality are rare for wild chimpanzees. here, we present skeletal pathology and body size data for 20 (19 crania, 12 postcrania) chimpanzees (pan troglodytes schweinfurthii) from kibale national park, uganda. we compare these data with other east african populations, especially g ...	2008	18067120
geophagy: soil consumption enhances the bioactivities of plants eaten by chimpanzees.	geophagy, the deliberate ingestion of soil, is a widespread practice among animals, including humans. although some cases are well documented, motivations and consequences of this practice on the health status of the consumer remain unclear. in this paper, we focused our study on chimpanzees (pan troglodytes schweinfurthii) of the kibale national park, uganda, after observing they sometimes ingest soil shortly before or after consuming some plant parts such as leaves of trichilia rubescens, whic ...	2008	18188538