Publications

the fine structure of the parotid gland of the spider monkey (ateles paniscus).		1969	4979187
the structure and biosynthesis of hemoglobins a and a2 in the new world primate ateles paniscus: a preliminary account.		1969	4981734
a study of new and old world monkeys to determine the likelihood of a simian reservoir of smallpox.	the author presents data indicating that three species of new world monkeys (cebus apella, ateles paniscus, lagothrix lagothricha) are not susceptible to brazilian variola minor. although the number of animals tested was not large, no experimental evidence was obtained to suggest that these species could form a non-human reservoir for smallpox in the western hemisphere. the results also indicate that cercopithecus aethiops are not very susceptible to infection with either variola major or minor. ...	1970	4317468
plasmodium falciparum infection induced in the black spider monkey, ateles fusciceps, and black howler monkey, alouatta villosa.		1970	4986058
hematologic values of the black spider monkey (ateles fusciceps), red spider monkey (ateles geoffroyi), white face monkey (cebus capucinus), and black howler monkey (alouatta villosa).		1971	4329310
the prevalence of trypanosomes and microfilariae in panamanian monkeys.	a total of 3,523 wild caught monkeys from panama was examined for blood parasites from august 1968 through june 1972. trypanosomes or microfilariae were observed in the blood of 31.1% of the monkeys. mixed infections, with microfilariae and trypanosomes, were detected in 6.6% of the animals. trypanosoma cruzi was found in marmosets. saguinus geoffroyi (12.2%), in white-faced capuchins, cebus capucinus (5.0%), in squirrel monkeys, saimiri sciureus (1.7%) and in black spider monkeys, ateles fuscic ...	1974	4217567
[karyotype of a male atele (ateles paniscus)].		1974	4141589
taxonomic notes on the pelage of ateles paniscus paniscus, a. p. chamek (sensu kellogg and goldman, 1944) and a. fusciceps rufiventris (equals a. f. robustus, kellogg and goldman, 1944).	observations on specimens of ateles paniscus paniscus, a. p. chamek and ateles fusciceps rufiventris (equals a. f. robustus) reveal unreported variations in coat color and lead to expansions of the current taxonomic descriptions of these subspecies. these variants are significant for the correct identification of spider monkeys used in biomedical research and in terms of distribution and speciation within the genus ateles.	1975	804562
allergic conjunctivitis in a juvenile black spider monkey.	allergic conjunctivitis in a young spider monkey (ateles fusciceps) was diagnosed on the basis of clinical signs, histomorphologic appearance of conjunctival biopsy specimens, and response to systemic corticosteroid therapy.	1977	411772
yersinia enterocolitica infections in non-human primates.	yersinia enterocolitica was isolated from ten non-human primates in the netherlands. the following species were represented: potto, senegalgalago, wooly monkey, black spider monkey, common marmoset, cottonhead tamarin, pigtailed macaque and lesser whitenosed guenon.	1977	418633
locomotion and posture in ateles geoffroyi and ateles paniscus.	the locomotor and postural behavior of ateles geoffroyi and ateles paniscus was studied in panama and surinam. ateles locomotion can be divided into five patterns on the basis of limb usage: quadrupedal walking and running, suspensory locomotion, climbing, bipedalism and leaping. the first three are commonly used in both locomotion during travel and locomotion during feeding, but climbing (especially 'horizontal climbing') is the most important pattern during feeding. most ateles locomotion take ...	1978	720997
cranial computed tomography in the evaluation of neurologic disorders in two nonhuman primates.	cranial computed tomography (cct) was used to evaluate neurologic disorders in 2 primates. in the 1st case, acute left hemiparesis developed in an adult female proboscis monkey (nasalis larvatus). a cct scan revealed a right frontal lobe abscess that was subsequently surgically drained. in the 2nd case, a juvenile black spider monkey (ateles fusciceps) experienced recurrent seizures following an episode of trauma and anoxia. a cct scan demonstrated enlarged lateral ventricles and cerebral atroph ...	1981	7328009
preliminary observations on habitat utilization and diet in eight surinam monkeys.	the eight monkey species occurring in surinam were studied in the raleigh-vallen-voltzberg nature reserve along the coppename river. special emphasis was placed on determining how these eight species divide up available habitat and food resources within a 300-ha study area. cebus apella apella is probably the most adaptable of the surinam monkeys. it was found mainly in the understory and lower to middle parts of the canopy of all five forest types (high rain forest, low rain forest, mountain sa ...	1981	6802728
attempts to establish onchocerca volvulus infection in primates and small laboratory animals.	attempts were made to transmit o. volvulus infection to small laboratory animals and several species of primates to identify a practical laboratory host for human onchocerciasis. infective larvae of o. volvulus of guatemalan origin were inoculated into the following animals: rhesus monkeys, bonnet monkeys, golden spider monkeys, black spider monkeys, galagos, opossums, jirds, newborn and adult swiss mice, kinkajou, cebus monkey, normal and splenectomized multimammate rats, and a calf. the animal ...	1982	6131591
census and preliminary observations on the ecology of the black-faced black spider monkey (ateles paniscus chamek) in manu national park, peru.	the black-faced black spider monkey, ateles paniscus chamek, was studied at cocha cashu, manu national park, peru, from june to august 1982. the density of independently locomoting individuals was found to be 31/km2, and the average party size was 3.15. data on age and sex compositions of parties, activity patterns, and diet composition are presented. the spider monkeys spend approximately 30% of observed time feeding, 44% resting, and 25% moving. they ate 80% fruit and 17% new leaves. spider mo ...	1986	31979460
demography, ranging patterns, and activity budgets of black spider monkeys (ateles paniscus chamek) in the manu national park, peru.	results of a long-term field study on the ecology and social organization of two groups of black spider monkeys (ateles paniscus chamek) in peru are reported. demography, ranging patterns, and activity budgets provide insight into some of the proximate determinants of fission-fusion social organization in this species and illustrate the different strategies used by males and females to gain access to critical resources. longitudinal data on known individuals provide evidence for male natal philo ...	1988	31968907
islet cell hyperplasia in an aged spider monkey (ateles paniscus).		1990	2238393
hardness as a basis of fruit choice in two sympatric primates.	fruit color and size are significant determinants of food choice in mammals and birds, but hardness, an important physical property of fruit and seeds, has generally been overlooked as a determinant of food choice in studies of mammalian foraging behavior. two methods were used to determine fruit hardness during a field study of two sympatric primates, the black spider monkey (ateles paniscus) and the bearded saki monkey (chiropotes satanas) in surinam. we measured both puncture resistance of fr ...	1990	2301558
genetic characterization of parental cell lines and biochemical analysis of somatic cell hybrids between mouse (rag) cells and fibroblasts of ateles paniscus chamek (primates, platyrrhini).	mouse (rag) cells, (deficient in hypoxanthine-phosphoribosyl-transferase), and ateles paniscus chamek primary fibroblasts were used in fusion experiments to generate somatic cell hybrids. both parental cell lines were genetically characterized by karyological and biochemical analyses with 27 isozyme systems. these procedures were useful for monitoring primate chromosome segregation in somatic cell hybrids, for detecting chromosome rearrangements of primate chromosomes, and for identifying indivi ...	1993	31937010
challenge of neotropical frugivory: travel patterns of spider monkeys and bearded sakis.	we compared travel patterns of two neotropical frugivores, ateles paniscus (black spider monkeys) and chiropotes satanas (bearded sakis), during a 6-month study at raleighvallen-voltzberg nature reserve in surinam. ateles were typically found in small foraging parties that changed in size and composition throughout the day. chiropotes troops moved from one feeding area to the next, fragmenting "locally" when they entered an area with more than one feeding tree. chiropotes moved through fewer hal ...	1994	31936972
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
morphological adaptation to diet in platyrrhine primates.	morphological features of the jaws and teeth are examined in eight species of platyrrhine monkeys that coexist in the suriname rainforest. z-scores calculated from geometric predictions for several features of the feeding apparatus thought to have some functional significance (e.g., tooth dimensions, jaw robusticity, leverage of primary jaw elevators) are compared to a profile of the naturalistic dietary behavior of these species (i.e., proportions of fruit mesocarp, seeds, leaves, and fauna eat ...	1994	8085615
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
comparative and functional myology of the prehensile tail in new world monkeys.	the caudal myology of prehensile-tailed monkeys (cebus apella, alouatta palliata, alouatta seniculus, lagothrix lagotricha, and ateles paniscus) and nonprehensile-tailed primates (eulemur fulvus, aotus trivirgatus, callithrix jacchus, pithecia pithecia, saimiri sciureus, macaca fascicularis, and cercopithecus aethiops) was examined and compared in order to identify muscular differences that correlate with osteological features diagnostic of tail prehensility. in addition, electrophysiological st ...	1995	7595958
radiation and speciation of spider monkeys, genus ateles, from the cytogenetic viewpoint.	the chromosomes of 22 animals of four subspecies of the genes ateles (a. paniscus paniscus, a. p. chamek, a. belzebuth hybridus, and a. b. marginatus) were compared using g/c banding and nor (nucleolar organizer region) staining methods. the cytogenetic data of ateles in the literature were also used to clarify the phylogenetic relationships of the species and subspecies and to infer the routes of radiation and speciation of these taxa. chromosomes 6 and 7 that showed more informative geographic ...	1997	9209583
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
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
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
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
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
monkeys of the rainforest in french guiana are natural reservoirs for p. brasilianum/p. malariae malaria.	monkey blood samples were collected from 214 monkeys relocated as part of the wildlife rescue organized in french guiana during the filling of the petit saut dam on the sinnamary river. these samples were tested for malaria parasites by microscopy of thick blood filsm and by nested pcr for small subunit rrna genes (ssurrna). parasitic blood forms similar to plasmodium brasilianum were detected in 4 monkey species: alouatta seniculus macconnelli, saguinus midas midas, pithecia pithecia and ateles ...	2000	10726261
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
nuclear dna variation in spider monkeys (ateles).	phylogenetic relationships based on dna sequence variation for the aldolase a intron v nuclear genomic region were evaluated and compared to phylogenies based on mitochondrial dna sequence variation among spider monkeys (ateles). samples of ateles ranging from central america throughout the amazon basin were sequenced to determine phylogenetic relationships among geographically widely distributed populations. analysis of nuclear dna sequences using parsimony, maximum-likelihood, and genetic dist ...	2001	11286492
three-dimensional analysis of nonhuman primate trabecular architecture using micro-computed tomography.	until recently, detailed analyses of the architecture of nonhuman primate cancellous bone have not been possible due to a combination of methodological constraints, including poor resolution imaging or destructive protocols. the development of micro-computed tomography (microct) and morphometric methods associated with this imaging modality offers anthropologists a new means to study the comparative architecture of cancellous bone. specifically, microct will allow anthropologists to investigate ...	2001	11471131
structural analysis of human ccr2b and primate ccr2b by molecular modeling and molecular dynamics simulation.	ccr2b, a chemokine receptor for mcp-1, -2, -3, -4, plays an important role in a variety of diseases involving infection, inflammation, and/or injury, as well as being a coreceptor for hiv-1 infection. two models of human ccr2b (hccr2b) were generated by homology modeling and 1 ns restrained molecular dynamics (md) simulation. in one only c113-c190 forms a disulfide bond (ss model); in another the potential c32-c277 disulfide bond was formed (2ss model). analysis of the structures and averaged di ...	2002	12192431
enamel thickness and microstructure in pitheciin primates, with comments on dietary adaptations of the middle miocene hominoid kenyapithecus.	many living primates that feed on hard food have been observed to have thick-enameled molars. among platyrrhine primates, members of the tribe pitheciini (cacajao, chiropotes, and pithecia) are the most specialized seed and nut predators, and cebus apella also includes exceptionally hard foods in its diet. to examine the hypothesized relationship between thick enamel and hard-object feeding, we sectioned small samples of molars from the platyrrhine primates aotus trivergatus, ateles paniscus, ca ...	2003	14624746
responses of dispersal agents to tree and fruit traits in virola calophylla (myristicaceae): implications for selection.	variation in traits affecting seed dispersal in plants has been attributed to selection exerted by dispersal agents. the potential for such selection was investigated in virola calophylla (myristicaceae) in manú national park, peru, through identification of seed dispersal agents and of tree and fruit traits significantly affecting the quantity of seeds dispersed. seventeen bird and one primate species (the spider monkey, ateles paniscus) dispersed its seeds. spider monkeys dispersed the majorit ...	2003	12684855
different rates of line-1 (l1) retrotransposon amplification and evolution in new world monkeys.	line-1 (l1) elements constitute the major family of retrotransposons in mammalian genomes. here we report the first investigation of l1 evolution in new world monkeys (nwm). two regions of the second open-reading frame were analyzed by two methods in three nwm species, the squirrel monkey (saimiri sciureus), the tamarin (saguinus oedipus), and the spider monkey (ateles paniscus). since these three species diverged, l1 has amplified in the saimiri and saguinus lineages but l1 activity seems to ha ...	2004	14743320
phylogenetic relationships among some ateles species: the use of chromosomic and molecular characters.	as with most platyrrhines, the systematics of ateles is under discussion. in order to help clarify its systematic, we employed chromosomic and molecular characters to analyze the phylogenetic relationship among some species of the genus ateles. chromosomic studies were conducted on 14 atelid specimens: eight ateles from a. paniscus, a. chamek, a. belzebuth and a. geoffroyi, and six alouatta caraya. ateles paniscus showed 2n=32, whereas a. chamek, a. belzebuth and a. geoffroyi presented 2n=34, xx ...	2005	15657638
phylogenetic inferences of atelinae (platyrrhini) based on multi-directional chromosome painting in brachyteles arachnoides, ateles paniscus paniscus and ateles b. marginatus.	we performed multi-directional chromosome painting in a comparative cytogenetic study of the three atelinae species brachyteles arachnoides, ateles paniscus paniscus and ateles belzebuth marginatus, in order to reconstruct phylogenetic relationships within this platyrrhini subfamily. comparative chromosome maps between these species were established by multi-color fluorescence in situ hybridization (fish) employing human, saguinus oedipus and lagothrix lagothricha chromosome-specific probes. the ...	2005	15545728
incorporating animal behavior into seed dispersal models: implications for seed shadows.	seed dispersal fundamentally influences plant population and community dynamics but is difficult to quantify directly. consequently, models are frequently used to describe the seed shadow (the seed deposition pattern of a plant population). for vertebrate-dispersed plants, animal behavior is known to influence seed shadows but is poorly integrated in seed dispersal models. here, we illustrate a modeling approach that incorporates animal behavior and develop a stochastic, spatially explicit simul ...	2006	17249240
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
neuroendocrine tumor in the lung of a captive black spider monkey (ateles paniscus).	this paper describes a neuroendocrine (ne) tumor of the lung that was observed during the necropsy of a 14-year-old female black spider monkey (ateles paniscus) with sudden death. grossly, multifocal firm and coalescing nodular masses were observed in the lung. the histological examination showed the tumor to be an typical ne tumor with polygonal cells grouped in small solid aggregates, with regularly sized, spherical, centrally placed nuclei with modest, lightly granular cytoplasm suspended in ...	2007	17675816
development of antibodies against humanized antitumor necrosis factor and loss of efficacy in a black spider monkey with inflammatory bowel disease.		2009	19125133
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
primate community of the tropical rain forests of saracá-taqüera national forest, pará, brazil.	brazil is the richest country in the world in terms of primate species and the amazonian rain forest is one of the richest biomes containing 15 (ca. 90%) of the neotropical primate genera. although considered key elements in conservation strategies, there is only anecdotal information on primates for several protected areas within the region. here we present new data on the community composition of the primates in the saracá-taqüera national forest (429,600 ha), an actively mined, bauxite rich a ...	2009	19967179
Physical properties of fruit and seeds ingested by primate seed predators with emphasis on sakis and bearded sakis.	Several primate radiations exhibit dental adaptations that enable them to gain access to seeds embedded in well-protected fruit. To a database drawn from published sources in which hardness of fruit and seeds were tested in the field, we added an additional 100+ species of plants used as resources by pitheciin primates (specifically, South American white-faced sakis (Pithecia pithecia) and bearded sakis (Chiropotes spp.). This sample allowed us to compare hardness of fruit and seeds and deduce t ...	2011	22042738
isolation of mycobacterium tuberculosis from captive ateles paniscus.	abstract an adult female red-faced black spider monkey (ateles paniscus), housed for 2 years in the parque estoril zoo in são paulo, brazil, showed apathy. clinical examination revealed discrete emaciation, swelling and induration of lymph nodes, and presence of a mass in the abdominal cavity. therapies with enrofloxacin, azithromycin, and ceftiofur were ineffective. the animal died after 6 months. necropsy and histopathology confirmed granulommas in lymph nodes, parietal and visceral pleura, lu ...	2011	20846010
[leptospiral antibodies in a colombian zoo's neotropical primates and workers].	detecting antibodies against leptospira spp. in neotropical primates and workers in a colombian zoo and identifying the risk factors associated with the disease.	2011	22634948
the primate community of cachoeira (brazilian amazonia): a model to decipher ecological partitioning among extinct species.	dental microwear analysis is conducted on a community of platyrrhine primates from south america. this analysis focuses on the primate community of cachoeira porteira (para, brazil), in which seven sympatric species occur: alouatta seniculus, ateles paniscus, cebus apella, chiropotes satanas, pithecia pithecia, saguinus midas, and saimiri sciureus. shearing quotients are also calculated for each taxon of this primate community. dental microwear results indicate significant differences between ta ...	2011	22076156
dilated cardiomyopathy in a spider monkey (ateles paniscus).	background a spider monkey with severe dyspnea was referred to our clinic. methods and results radiographs revealed an enlarged cardiac silhouette. ventricular tachycardia and st segment depression were also diagnosed after an ecg. these findings coupled with the postmortem examination confirmed dilatative cardiomyopathy. conclusions this case is worthy of presentation since dilatative cardiomyopathy has been rarely encountered in spider monkeys.	2012	22220826
molecular diagnosis of leishmania amazonensis in a captive spider monkey in bauru, são paulo, brazil.	the municipality of bauru, são paulo, brazil, is an area endemic for leishmaniasis. at the zoo, a spider monkey (ateles paniscus) showed nonpathognomonic symptoms, such as weight loss and pale mucous membranes. blood was collected from the jugular vein and investigated for the presence of leishmania spp. dna by polymerase chain reaction and restriction fragment length polymorphism. parasite dna was detected, and the pattern observed was identical to leishmania amazonensis. this study presents mo ...	2012	23272368
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
edge effects in the primate community of the biological dynamics of forest fragments project, amazonas, brazil.	while much is known about abiotic and vegetative edge effects in tropical forests, considerably less is known about the impact of forest edges on large mammals. in this study, we examine edge effects in a primate community to determine: 1) the distance from the edge over which edge effects in primate density are detectable, 2) whether individual species exhibit edge effects in their density, and 3) whether biological characteristics can be used to predict primate presence in edge habitats. given ...	2014	25130367
mecp2, a gene associated with rett syndrome in humans, shows conserved coding regions, independent alu insertions, and a novel transcript across primate evolution.	the methyl-cpg binding protein two gene (mecp2) encodes a multifunctional protein comprising two isoforms involved in nuclear organization and regulation of splicing and mrna template activity. this gene is normally expressed in all tissues, with a higher expression level in the brain during neuronal maturation. loss of mecp2 function is the primary cause of rett syndrome (rtt) in humans, a dominant, x-linked disorder dramatically affecting neural and motor development.	2015	26148505
phylogenetic relationships of mesoamerican spider monkeys (ateles geoffroyi): molecular evidence suggests the need for a revised taxonomy.	mesoamerican spider monkeys (ateles geoffroyi sensu lato) are widely distributed from mexico to northern colombia. this group of primates includes many allopatric forms with morphologically distinct pelage color and patterning, but its taxonomy and phylogenetic history are poorly understood. we explored the genetic relationships among the different forms of mesoamerican spider monkeys using mtdna sequence data, and we offer a new hypothesis for the evolutionary history of the group. we collected ...	2015	25451800
assessing the sustainability of waiwai subsistence hunting in guyana with implications for co-management in amazonian indigenous reserves.	while hunting is a key component of the subsistence strategies of many amazonians, it is also one of the most important threats to wildlife conservation throughout south america. as indigenous reserves now make up more than 20% of amazonia, effective conservation often requires working closely with indigenous groups as shared stakeholders in the management of hunting. we present a novel approach to co-management that integrates hunter generated harvesting data with spatially explicit, biodemogra ...	2017	28074624
determination of vertebral heart score in three species of spider monkey (ateles fusciceps, a. hybridus and a. paniscus).	the vertebral heart score (vhs) is a method of evaluation of cardiac size well documented in domestic mammals and in other primate species, and the aim of this study was to determine the vhs in three species of spider monkey.	2017	28561884
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
association between genomic instability and evolutionary chromosomal rearrangements in neotropical primates.	during the last decades, the mammalian genome has been proposed to have regions prone to breakage and reorganization concentrated in certain chromosomal bands that seem to correspond to evolutionary breakpoints. these bands are likely to be involved in chromosome fragility or instability. in primates, some biomarkers of genetic damage may be associated with various degrees of genomic instability. here, we investigated the usefulness of sister chromatid exchange as a biomarker of potential sites ...	2018	29905781
modifications of the rain forest frugivore community are associated with reduced seed removal at the community level.	tropical rain forests worldwide are under increasing pressure from human activities, which are altering key ecosystem processes such as plant-animal interactions. however, while the direct impact of anthropogenic disturbance on animal communities has been well studied, the consequences of such defaunation for mutualistic interactions such as seed dispersal remains chiefly understood at the plant species level. we asked whether communities of endozoochorous tree species had altered seed removal i ...	2020	32011762