Publications

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partial molecular characterization of two simian immunodeficiency viruses (siv) from african colobids: sivwrc from western red colobus (piliocolobus badius) and sivolc from olive colobus (procolobus verus).in order to study primate lentivirus evolution in the colobinae subfamily, in which only one simian immunodeficiency virus (siv) has been described to date, we screened additional species from the three different genera of african colobus monkeys for siv infection. blood was obtained from 13 west african colobids, and hiv cross-reactive antibodies were observed in 5 of 10 piliocolobus badius, 1 of 2 procolobus verus, and 0 of 1 colobus polykomos specimens. phylogenetic analyses of partial pol se ...200312477880
mating system of an exceptional primate, the olive colobus (procolobus verus).in the olive colobus (procolobus verus), many groups have multiple males and the males have large testes. this indicates that even though this species lives in small groups, single males do not monopolize the groups. we investigated the strategies employed by males to secure their mating success, and sought to determine whether the lack of male monopolization was a result of female mating strategies, as indicated by the exaggerated sexual swellings of the females. four study groups were monitore ...200415085531
full-length genome characterization of a novel simian immunodeficiency virus lineage (sivolc) from olive colobus (procolobus verus) and new sivwrcpbb strains from western red colobus (piliocolobus badius badius) from the tai forest in ivory coast.simian immunodeficiency viruses (sivs) are found in an extensive number of african primates and humans continue to be exposed to these viruses by hunting and handling of primate bushmeat. full-length genome sequences were obtained from sivs derived from two colobinae species inhabiting the taï forest, ivory coast, each belonging to a different genus: sivwrc from western red colobus (piliocolobus badius badius) (sivwrcpbb-98ci04 and sivwrcpbb-97ci14) and sivolc (sivolc-97ci12) from olive colobus ...200918922864
the presence of a vpu gene and the lack of nef-mediated downmodulation of t cell receptor-cd3 are not always linked in primate lentiviruses.nef is an accessory protein critical for the ability of human and simian immunodeficiency viruses (hiv and siv) to replicate efficiently in their respective hosts. previous analyses of members of 15 different primate lentivirus lineages revealed a link between nef function and the presence of a vpu gene. in particular, nef proteins of all vpu-containing viruses had lost their ability to downmodulate the t cell (tcr-cd3) receptor. here we examined nef proteins from eight additional siv lineages, ...201021068258
[studies on the dermatoglyphic patterns in the palm and sole of colobus polykomos, colobus badius, colobus verus and nasalis larvatus]. 20164965011
diversity and prevalence of gastrointestinal parasites in seven non-human primates of the taï national park, côte d'ivoire.parasites and infectious diseases are well-known threats to primate populations. the main objective of this study was to provide baseline data on fecal parasites in the cercopithecid monkeys inhabiting côte d'ivoire's taï national park. seven of eight cercopithecid species present in the park were sampled: cercopithecus diana, cercopithecus campbelli, cercopithecus petaurista, procolobus badius, procolobus verus, colobus polykomos, and cercocebus atys. we collected 3142 monkey stool samples betw ...201525619957
lack of evidence of simian immunodeficiency virus infection among nonhuman primates in taï national park, côte d'ivoire: limitations of noninvasive methods and siv diagnostic tools for studies of primate retroviruses.it is now well established that the human immunodeficiency viruses, hiv-1 and hiv-2, are the results of cross-species transmissions of simian immunodeficiency viruses (siv) naturally infecting nonhuman primates in sub-saharan africa. sivs are found in many african primates, and humans continue to be exposed to these viruses by hunting and handling primate bushmeat. sooty mangabeys (cercocebus atys) and western red colobus (piliocolobus badius badius) are infected with siv at a high rate in the t ...201123950618
enamel chipping in taï forest cercopithecids: implications for diet reconstruction in paleoanthropological contexts.antemortem enamel chipping in living and fossil primates is often interpreted as evidence of hard-object feeding (i.e., 'durophagy'). laboratory analyses of tooth fracture have modeled the theoretical diets and loading conditions that may produce such chips. previous chipping studies of nonhuman primates tend to combine populations into species samples, despite the fact that species can vary significantly in diet across their ranges. chipping is yet to be analyzed across population-specific spec ...202032179368
does oxygen stable isotope composition in primates vary as a function of vertical stratification or folivorous behaviour?stable isotopes of oxygen often vary within a community of primates. for example, folivorous monkeys that forage in the upper reaches of the forest canopy tend to evince high δ18o values, whereas those that prefer the understory tend to have lower δ18o values. given that leaves also have high δ18o values, particularly higher in the canopy, there is uncertainty as to which behavioural variable - vertical stratification or folivory - is the primary determinant of variation in δ18o values. here, we ...202031574501
association between olive colobus (procolobus verus), diana guenons (cercopithecus diana), and other forest monkeys in sierra leone.close association between olive colobus (procolous verus) and other monkeys (especially cercopithecus species) has been observed throughout the range of p. verus in the forest zone of west africa. to investigate the basis of this association, we made new observations in sierra leone, concentrated at tiwai island. we obtained data on the association patterns of monkeys over a large area of the island from line-transect samples, and studied association behavior via long-term observational sampling ...199031963982
bone surface micro-topography at craniofacial entheses: insights on osteogenic adaptation at muscle insertions.macroscopic details of the bone-muscle interface are represented by a mosaic of calcified features inclusive of fossae, tuberosities, crests, and ridges. these features are in part of an adaptive osteogenic response to dissipate forces of localized mechanical loading. in an osteoarchaeological or paleontological context, these features are interpreted as "musculoskeletal stress markers" to infer habitual behaviors. microscopic surveys of bone surface topography of the enthesis can reveal localiz ...201931251841
[ontogenesis of facial muscles in primates].1. the development of facial muscles is studied in embryos of tupaia belangeri, tupaia javanica, nycticebus coucang, galago dimidovii, tarsius bancanus, callithrix jacchus, colobus badius, colobus verus, nasalis larvatus, and homo sapiens. 2. the facial muscles derive from a superficial blastema (anlage of platysma myoides) and another blastema laying beneath the first one (anlage of sphincter colli muscle). both blastemas grow out from mesenchymal cells of the head after the anlagen of all othe ...19807215749
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