Publications

gene mapping in the spider monkey (ateles paniscus chamek).	sixteen isozyme markers have been assigned to the chromosome complement of the neotropical primate species ateles paniscus chamek using three somatic cell hybrid panels. several genetic associations were found to be common between humans and this species, despite the fact that ateles is a karyologically rearranged taxon. conversely, several human gene clusters were disrupted, resulting in gene associations not previously found in other primates. a comparison with other primates and mammalian ord ...	1994	7995927
simian malaria at two sites in the brazilian amazon. i--the infection rates of plasmodium brasilianum in non-human primates.	the parasite that causes simian malaria in the brazilian amazon, plasmodium brasilianum, is infective to man. in this region, where humans live within and in close proximity to the forest, it was suspected that this parasite could be the cause of a zoonosis. a study was performed in the areas surrounding two hydroelectric plants in the amazon, balbina and samuel, aiming at determining the zoonotic potential of this parasite. p. brasilianum was detected in, respectively, 15.8% and 9.9% of 126 and ...	1995	8544737
assignment of tcf1, tgm1, calm1, ckb, thbs1, b2m, and fes in ateles paniscus chamek (platyrrhini, primates).	regional assignment of five markers to chromosome 2 of ateles paniscus chamek (apc) confirmed a syntenic association similar to human (hsa) 12q + 14q + 15q. tcf1 was allocated to a shortest region of overlap (sro) in apc 2p and found to be syntenic to pepb, while tgm1, calm1, thbs1, and b2m were assigned to apc 2q, being syntenic to np, hexa, and mpi. conversely, markers close to hsa 14qter (ckb) and hsa 15qter (fes-idh2) were relocated to other ateles syntenic groups. karyotypic comparisons sho ...	1997	9533020
the human chromosome 3 gene cluster acy1-cacna1d-znf64-atp2b2 is evolutionarily conserved in ateles paniscus chamek (platyrrhini, primates).	comparative mapping of ateles paniscus chamek and man indicated that four human 3p markers are syntenic in this karyotypically rearranged neotropical primate. the evolutionary conservation of this gene cluster includes three adjacent human shortest regions of overlap (sros): 3p21.1 (acy1), 3p21.3-->p21.2 (cacna1d), and 3p21.3 (znf64). a fourth syntenic marker (atp2b2), at a more distal human sro (3p26-->p25), indicated that human 3pter-->p14 is evolutionarily conserved in ateles chromosome 3 (ap ...	1997	9284946
comparative gene assignment in ateles paniscus chamek (platyrrhini, primates) and man: association of three separate human syntenic groups and evolutionary considerations.	regional assignment of eight markers to chromosome 2 of ateles paniscus chamek (apc) confirmed a syntenic association similar to human (hsa) 12q + 14q + 15q. three hsa 12q markers (rap1b, pah and aldh2) were allocated to a shortest region of overlap (sro) in apc 2p and found to be syntenic to other hsa 12q markers (pepb and tcf1). five hsa 14q markers (ctla, pax9, nsp, fos and chga) were allocated to apc 2q and found to be syntenic to other hsa 14q markers (np, tgm1, and calm1) and to four hsa 1 ...	1998	9601975
primate diversity, habitat preferences, and population density estimates in noel kempff mercado national park, santa cruz department, bolivia.	this report documents primate communities at two sites within noel kempff mercado national park in northeastern santa cruz department, bolivia. diurnal line transects and incidental observations were employed to survey two field sites, lago caiman and las gamas, providing information on primate diversity, habitat preferences, relative abundance, and population density. primate diversity at both sites was not particularly high, with six observed species: callithrix argentata melanura, aotus azara ...	1998	9802511
immobilization and health assessment of free-ranging black spider monkeys (ateles paniscus chamek).	eight free-ranging black spider monkeys (ateles paniscus chamek) were immobilized with telazol in bolivia for the purpose of radio-collaring. during this procedure, the animals received complete medical examinations, and samples were collected for health analyses. biochemical test results varied with the degree of condition of the animals, and a variety of physical abnormalities were found. evidence of previous infections with leptospira sp., encephalitis virus, and yellow fever virus was found. ...	1998	9503123
evolutionary disruptions of human syntenic groups 3, 12, 14, and 15 in ateles paniscus chamek (platyrrhini, primates).	comparative gene assignments of 18 markers, based on analyses of somatic cell hybrids and previous data in the literature, indicated that human (hsa) syntenic groups 3, 12, 14, and 15 are dissociated in the spider monkey species ateles paniscus chamek (apc). markers present in hsa 3p were allocated to apc 3 and apc 9. the hsa 12 cluster was split into two syntenic groups, one mainly including hsa 12p markers in apc 16 and the other, including hsa 12q markers, in apc 2p. the hsa 14q cluster split ...	1999	10702662
gene assignment in the spider monkey (ateles paniscus chamek--apc): ape-myh7 to 2q; ar-gla-f8c to the x chromosome.	comparative gene assignment between the spider monkey species ateles paniscus chamek (apc) and man (hsa) showed conserved syntenic associations despite extensive karyotypic rearrangement between species. two hsa 14q genes were allocated to apc 2q, being syntenic to other hsa 14q and hsa 15q markers previously assigned to apc 2q, and to hsa 12q genes previously assigned to apc 2p. these findings were consistent with a. geoffroyi chromosome painting with human whole-chromosome probes, indicating t ...	1999	10485134
gene assignment in ateles paniscus chamek (platyrrhini, primates). allocation of 18 markers of human syntenic groups 1, 2, 7, 14, 15, 17 and 22.	eighteen markers allocated to human syntenic groups 1, 2, 7, 14, 15, 17 and 22 were assigned to the chromosome complement of the neotropical primate ateles paniscus chamek. these new allocations and existing gene charts in this species were compared with chromosome painting patterns produced by human chromosome probes in the congeneric species a teles geoffroyi and with available data on the human genome and gene mapping. these comparisons showed congruent findings in ateles and provided good ev ...	2001	11778686
party size and diet of syntopic atelids (ateles chamek and lagothrix cana) in southwestern brazilian amazonia.	syntopic alouatta seniculus, ateles chamek and lagothrix cana (atelidae) were studied in southwestern amazonia. primate populations were first surveyed, and then the party size, diet and vertical spacing were monitored over a 5-month period. atelids accounted for more than half the survey sightings and lagothrix was the most abundant. party sizes recorded for both alouatta and lagothrix during monitoring were significantly larger than those recorded during surveys, but no such difference was fou ...	2001	11713409
geographic distribution and abundance of woolly (lagothrix cana) and spider (ateles chamek) monkeys in southwestern brazilian amazonia.	two species of frugivorous atelids, ateles chamek and lagothrix cana, occur in southwestern brazilian amazonia. populations were surveyed at 36 sites in the state of rondônia. ateles chamek is widespread, but the distribution of l. cana is limited by a combination of riverine barriers and ecological factors, possibly including competition with a. chamek. groups of l. cana were generally larger and more abundant than those of a. chamek, even in syntopy. the transitional forest that predominates i ...	2002	11793413
seasonal variations in black-faced black spider monkey (ateles chamek) habitat use and ranging behavior in a southern amazonian tropical forest.	data are presented regarding the habitat use and ranging behavior of a spider monkey (ateles chamek) community at lago caiman in northeastern bolivia. habitat use was driven primarily by fruit availability and distribution across the community home range. strong seasonal variations occurred in fruit availability within all five of the floristically and phenologically distinct habitat types identified within the study site, and the spider monkeys dramatically shifted their ranging according to wh ...	2006	16534811
the sustainability of subsistence hunting by matsigenka native communities in manu national park, peru.	the presence of indigenous people in tropical parks has fueled a debate over whether people in parks are conservation allies or direct threats to biodiversity. a well-known example is the matsigenka (or machiguenga) population residing in manu national park in peruvian amazonia. because the exploitation of wild meat (or bushmeat), especially large vertebrates, represents the most significant internal threat to biodiversity in manu, we analyzed 1 year of participatory monitoring of game offtake i ...	2007	17883483
a new species of dipetalonema (filarioidea: onchocercidae) from ateles chamek from the beni of bolivia.	we describe a new species of dipetalonema occurring in the body cavity of ateles chamek (humboldt, 1812) from north-central bolivia. morphologic characters serving to separate dipetalonema yatesi n. sp. from known forms include a vagina vera with a simple tube and thin walls and a left spicule, which possesses a handle shorter than the lamina (ratio 2.7); the latter displays an anterior membranous alae similar in length to the terminal flagellum, a distal extremity of the left spicule within a s ...	2007	17626361
chromosomal localization of the telomeric (ttaggg)n sequence in eight species of new world primates (neotropical primates, platyrrhini).	chromosomal localization of the telomeric sequence (ttaggg)(n) in eight new world primates (platyrrhini) (alouatta caraya, alouatta palliata, alouatta guariba clamitans, aotus azarae, ateles chamek, cebus nigritus, cebus paraguayanus, and saimiri boliviensis) using fluorescence in situ hybridization (fish) with a peptide nucleic acid (pna) pantelomeric probe and their possible relationship with the c-banding pattern were analyzed. fish showed telomeric signals only at the terminal regions of chr ...	2007	18253032
intra-community infanticide and forced copulation in spider monkeys: a multi-site comparison between cocha cashu, peru and punta laguna, mexico.	we describe two cases of infanticide, two suspected infanticides, and a forced copulation by familiar resident males in two populations of wild spider monkeys (ateles belzebuth chamek and a. geoffroyi yucatanensis). these are the first known infanticides and forced copulation in spider monkeys. data were gathered from four neighboring communities of spider monkeys in manu national park at the cocha cashu biological station, peru and two communities in the otoch ma'ax yetel kooh reserve at punta ...	2008	18064591
towing the party line: territoriality, risky boundaries and male group size in spider monkey fission-fusion societies.	spider monkey communities are classic fission-fusion primate societies. i present data suggesting that spider monkeys (ateles chamek) at lago caiman are territorial; adult males traveled further and faster than adult females and subgroup size was significantly higher in boundary areas of the spider monkey territory where intercommunity disputes were observed than in non-boundary areas. i then go on to examine data from 20 ateles communities distributed across 14 study sites and five species to i ...	2008	17894384
synteny of human chromosomes 14 and 15 in the platyrrhines (primates, platyrrhini).	in order to study the intra- and interspecific variability of the 14/15 association in platyrrhini, we analyzed 15 species from 13 genera, including species that had not been described yet. the dna libraries of human chromosomes 14 and 15 were hybridized to metaphases of alouatta guariba clamitans, a. caraya, a. sara, ateles paniscus chamek, lagothrix lagothricha, brachyteles arachnoides, saguinus midas midas, leontopithecus chrysomelas, callimico goeldii, callithrix sp., cebus apella, aotus nig ...	2009	21637455
male mating tactics in spider monkeys: sneaking to compete.	i investigated the mating system and male mating tactics for a population of wild spider monkeys (ateles belzebuth chamek), to identify the behaviors males used to achieve and maintain access to sexually receptive females, and to examine if some males used more tactics than other males and/or had differential access to females. results show that the mating system mostly involved scramble competition polygyny and that males used a range of mating tactics and behaviors, previously unreported for s ...	2010	20653005
geophagy in brown spider monkeys (ateles hybridus) in a lowland tropical rainforest in colombia.	spider monkeys and howler monkeys are the only neotropical primates that eat soil from mineral licks. not all species within these genera visit mineral licks, and geophagy has been restricted to populations of ateles belzebuth belzebuth,ateles belzebuth chamek and alouatta seniculus in western amazonian rainforests. with the aid of a camera trap we studied the visitation patterns of a group of brown spider monkeys (ateles hybridus) to a mineral lick at serrania de las quinchas, in colombia. spid ...	2011	21494049
extension of the geographic range of ateles chamek (primates, atelidae): evidence of river-barrier crossing by an amazonian primate.	the black-faced black spider monkey (ateles chamek) is endangered because of hunting and habitat loss. there are many gaps in our understanding of its geographic distribution. the ucayali-solimões-amazon fluvial complex is currently recognized as the northern boundary of the species' range, although published reports have indicated that it occurs north of the rio solimões. in this study we investigate published records, generate new field records, and assess the current information concerning th ...	2014	24510072
a new distribution range of ateles chamek (humboldt 1812) in an ecotone of three biomes in the paraguay river basin.	historical records of ateles chamek (black-faced black spider monkey) suggest that the species range extends further south of the known species distribution, within an ecotonal region between the amazonia, cerrado and pantanal biomes in brazil. ecotones are zones of habitat transition with high species richness that remain undersampled as conservationists often prioritize biodiversity hotspots. thus, distribution ranges may be inaccurately measured when species occur in ecotonal zones. we report ...	2017	28213677