| chromosomal homologies between cebus and ateles (primates) based on zoo-fish and g-banding comparisons. | zoo-fish (fluorescent "in vitro" hybridization) was used to establish the chromosomal homology between humans (hsa) and cebus nigrivitatus (cni) and ateles belzebuth hybridus (abh). these two species belong to different new world monkey families (cebidae and atelidae, respectively) which differ greatly in chromosome number and in chromosome morphology. the molecular results were followed by a detailed banding analysis. the ancestral karyotype of cebus was then determined by a comparison of in si ... | 2002 | 12210670 |
| entamoeba histolytica infections in captive primates. | a group based survey on the presence of entamoeba histolytica and entamoeba dispar using real-time pcr among 20 species of captive non-human primates was performed after diagnosis of e. histolytica dysentery in a spider monkey ( ateles belzebuth hybridus). e. histolytica dna was detected in three species of new world primates and in three species of old world primates. in five of six e. histolytica isolates, it was possible to amplify the srehp gene. they all revealed the same pattern after alui ... | 2003 | 12756542 |
| 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 |
| 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 |
| effects of fragment and vegetation structure on the population abundance of ateles hybridus, alouatta seniculus and cebus albifrons in magdalena valley, colombia. | many primate species currently subsist in fragmented and anthropogenically disturbed habitats. different threats arise depending on the species' life history strategy, dietary requirements and habitat preference. additionally, anthropogenic disturbance is far from uniform and may affect individual forest fragments in a single landscape in differing ways. we studied the effects of fragmentation on three species of diurnal primate, cebus albifrons, alouatta seniculus and ateles hybridus, in magdal ... | 2016 | 27093602 |
| validation of an enzyme immunoassay for assessing adrenocortical activity and evaluation of factors that affect levels of fecal glucocorticoid metabolites in two new world primates. | non-invasive methods to assess stress hormone output via fecal glucocorticoid metabolites (fgcms) have become a powerful tool in behavioral studies and conservation biology because they allow exploring the link between behavior, an animal's socio-ecological environment and its adrenocortical activity. however, fgcm levels are influenced by numerous other factors which often confound their interpretation. thus, before applying these methods, knowledge on the impact of these factors is important. ... | 2013 | 23707497 |
| effects of logging, hunting, and forest fragment size on physiological stress levels of two sympatric ateline primates in colombia. | habitat fragmentation and anthropogenic disturbances are of major concern to the conservation of endangered species because of their potentially negative impact on animal populations. both processes can impose physiological stress (i.e. increased glucocorticoid output) on animals, and chronically elevated stress levels can have detrimental effects on the long-term viability of animal populations. here, we investigated the effect of fragment size and human impact (logging and hunting pressure) on ... | 2013 | 27293615 |
| interspecific infanticide and infant-directed aggression by spider monkeys (ateles hybridus) in a fragmented forest in colombia. | interspecific aggression amongst nonhuman primates is rarely observed and has been mostly related to scenarios of resource competition. interspecific infanticide is even rarer, and both the ultimate and proximate socio-ecological factors explaining this behavior are still unclear. we report two cases of interspecific infanticide and five cases of interspecific infant-directed aggression occurring in a well-habituated primate community living in a fragmented landscape in colombia. all cases were ... | 2012 | 22767357 |
| bimodal evolution of the killer cell ig-like receptor (kir) family in new world primates. | the immunoglobulin-like receptor (kir) gene family in new world primates (platyrrhini) has been characterized only in the owl monkey (aotus sp.). to gain a better understanding of the kir system in platyrrhini, we analyzed a kir haplotype in ateles geoffroyi, and sequenced kir complementary dnas (cdnas) from other three atelidae species, ateles hybridus, ateles belzebuth, and lagothrix lagotricha. atelidae expressed a variable set of activating and inhibitory kirs that diversified independently ... | 2013 | 23846852 |
| correction to 'brown spider monkeys (ateles hybridus): a model for differentiating the role of social networks and physical contact on parasite transmission dynamics'. | | 2015 | 25964465 |
| brown spider monkeys (ateles hybridus): a model for differentiating the role of social networks and physical contact on parasite transmission dynamics. | elevated risk of disease transmission is considered a major cost of sociality, although empirical evidence supporting this idea remains scant. variation in spatial cohesion and the occurrence of social interactions may have profound implications for patterns of interindividual parasite transmission. we used a social network approach to shed light on the importance of different aspects of group-living (i.e. within-group associations versus physical contact) on patterns of parasitism in a neotropi ... | 2015 | 25870396 |
| behavioral and physiological responses to fruit availability of spider monkeys ranging in a small forest fragment. | numerous animal species currently experience habitat loss and fragmentation. this might result in behavioral and dietary adjustments, especially because fruit availability is frequently reduced in fragments. food scarcity can result in elevated physiological stress levels, and chronic stress often has detrimental effects on individuals. some animal species exhibit a high degree of fission-fusion dynamics, and theory predicts that these species reduce intragroup feeding competition by modifying t ... | 2014 | 24820229 |
| diet of the critically endangered brown spider monkey (ateles hybridus) in an inter-andean lowland rainforest in colombia. | brown spider monkeys (ateles hybridus) are one of the least known and more threatened primates in the neotropics. recognized as a species about a decade ago, field studies on these endangered primates have mainly focused on estimating local population densities. since 2006, we habituated a group of wild brown spider monkeys at serranía de las quinchas, colombia, and studied their feeding ecology during 2.5 years using focal "subgroup" sampling, and conducted phenological surveys in order to esti ... | 2012 | 22914973 |
| seasonality, richness and prevalence of intestinal parasites of three neotropical primates (alouatta seniculus, ateles hybridus and cebus versicolor) in a fragmented forest in colombia. | studies on parasites infecting non-human primates are essential to better understand the potential threat to humans of zoonoses transmission, particularly under the current processes of pervasive land use change and biodiversity loss. the natural ecosystems in the middle magdalena river basin in colombia have suffered a dramatic reduction and transformation into pastures and agroindustrial monocultures, threatening their biodiversity, and probably affecting the dynamics between parasites and the ... | 2017 | 28794984 |
| 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 |