gustatory effects of miraculin, monellin and thaumatin in the saguinus midas tamarin monkey studied with electrophysiological and behavioural techniques.a comparative electrophysiological and behavioural study has been made in 17 closely related monkeys of the new world species, saguinus midas tamarin. the electrical activity in the chorda tympani proper nerve of two of the monkeys was recorded during the application to the tongues of 0.02% monellin and thaumatin, 0.5% miraculin and stimuli representing the four taste qualities. it was observed that monellin and thaumatin gave no or little response and that miraculin enhanced the response to the ...1976821313
the insectivorous-frugivorous diet of the golden-handed tamarin (saguinus midas midas) in french guiana.the diet of saguinus midas is characterised by analysis of stomach contents samples on an annual and seasonal basis. the diet comprises significant proportions of both fruit and insects all year round, although fruit use shows important seasonal variations. the tamarins reduce their use of fruit resources during the peak fruiting season and instead exploit increased opportunities for insectivory. this is suggested to be a response to differences in gross fruit availability as a function of both ...199910050061
habitat use by chiropotes satanas utahicki and syntopic platyrrhines in eastern amazonia.primates were surveyed at two sites in the xingu-tocantins interfluvium, in eastern amazonia, where at least eight platyrrhines are known to occur, including the endemic chiropotes satanas utahicki, vulnerable to extinction. only three other forms; alouatta belzebul belzebul, cebus apella apella, and saguinus midas niger; were recorded at both sites. data on habitat use (forest type and strata) were collected in standard line transect surveys and analyzed with relation to the availability of for ...200010711535
conservation of absolute foveal area in new world monkeys. a constraint on eye size and conformation.the foveal specializations of five new world monkeys, the marmoset, callithrix jacchus; the golden-handed tamarin, saguinus midas niger; the squirrel monkey, saimiri ustius; the capuchin monkey, cebus apella; and the howler monkey, alouatta caraya were compared. although retinal area varies by over a factor of two in these monkeys, the area of the fovea does not covary with retinal area and remains approximately the same absolute size, as measured by the dimensions of the high density region of ...200011251320
novel gamma-1 herpesviruses identified in free-ranging new world monkeys (golden-handed tamarin [saguinus midas], squirrel monkey [saimiri sciureus], and white-faced saki [pithecia pithecia]) in french guiana.the recent finding of a novel epstein-barr virus-related lymphocryptovirus (calhv-3) in a captive colony of common marmoset (callithrix jacchus) in the united states modifies the view that the host range of lymphocryptovirus is restricted to humans and old world primates. we investigated the presence of epstein-barr virus-related viruses in 79 samples of new world monkeys caught in the wild, including six species of the cebidae family and one of the callitrichidae, living in the rain forest of f ...200312885928
scaling of neuron number and volume of the pulvinar complex in new world primates: comparisons with humans, other primates, and mammals.the lateral posterior nucleus and pulvinar (lp-pulvinar complex) are the principal thalamic nuclei associated with the elaborate development of the dorsal and ventral streams of the parietal cortex in primates. in humans, a novel site of origin for a subpopulation of pulvinar neurons has been observed, the ganglionic eminence of the telencephalon. this additional site of neuron origin has been proposed to contribute to the pulvinar's evolutionary expansion (letinic and rakic [2001] nat neurosci ...200717640049
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 ...200919967179
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 ...200921637455
bifidobacterium reuteri sp. nov., bifidobacterium callitrichos sp. nov., bifidobacterium saguini sp. nov., bifidobacterium stellenboschense sp. nov. and bifidobacterium biavatii sp. nov. isolated from faeces of common marmoset (callithrix jacchus) and red-handed tamarin (saguinus midas).five strains of bifidobacteria were isolated from faeces of a common marmoset (callithrix jacchus) and a red-handed tamarin (saguinus midas). the five isolates clustered inside the phylogenetic group of the genus bifidobacterium but did not show high sequence similarities between the isolates and to known species in the genus by phylogenetic analysis based on 16s rrna gene sequences. sequence analyses of dnaj1 and hsp60 also indicated their independent phylogenetic positions to each other in the ...201222225994
suppurative peritonitis by klebsiella pneumoniae in captive gold-handed tamarin (saguinus midas midas).this report describes an outbreak of suppurative peritonitis caused by klebsiella pneumoniae in an adult female of captive golden-handed tamarin (saguinus midas midas). two virulent and multidrug-resistant strains were isolated and classified through mlst as st60 and st1263. the microbiological diagnosis works as a support tool for preventive measures.201626620445
number and topography of cones, rods and optic nerve axons in new and old world better understand the evolution of spatial and color vision, the number and spatial distributions of cones, rods, and optic nerve axon numbers were assessed in seven new world primates (cebus apella, saimiri ustius, saguinus midas niger, alouatta caraya, aotus azarae, calllithrix jacchus, and callicebus moloch). the spatial distribution and number of rods and cones was determined from counts of retinal whole mounts. optic axon number was determined from optic nerve sections by electron micros ...200818598400
comparative assessment of behaviorally derived personality structures in golden-handed tamarins (saguinus midas), cotton-top tamarins (saguinus oedipus), and common marmosets (callithrix jacchus).one way to address questions about the origins and adaptive significance of personality dimensions is by comparing the personality structures of closely related species that differ in their socioecological circumstances. for the present study, we compared the personalities of captive golden-handed tamarins (saguinus midas; n = 28), cotton-top tamarins (saguinus oedipus; n = 20), and common marmosets (callithrix jacchus; n = 17). all 3 species are new world monkeys of the family callitrichidae. t ...202032391706
non-human primate models of dengue virus infection: a comparison of viremia levels and antibody responses during primary and secondary infection among old world and new world monkeys.due to the global burden of dengue disease, a vaccine is urgently needed. one of the key points in vaccine development is the development of a robust and reliable animal model of dengue virus infection. characteristics including the ability to sustain viral replication, demonstration of clinical signs, and immune response that resemble those of human dengue virus infection are vital in animal models. preclinical studies in vaccine development usually include parameters such as safety evaluation, ...202032230836
food sharing patterns in three species of callitrichid monkeys (callithrix jacchus, leontopithecus chrysomelas, saguinus midas): individual and species sharing (fs) in cooperatively breeding callitrichids is unusual among nonhuman primates because they regularly share significant amounts of preferred food with immatures and engage in proactive fs. however, it is still unclear which classes of individuals (males or females, breeders or helpers) engage most in fs, and whether differences exist among callitrichid species. in the first part of this study, we characterized general fs patterns in common marmosets (callithrix jacchus). we found s ...201930985161
chromosome studies of saguinus midas niger (callithricidae, primates) from tucurui, para, brazil: comparison with the karyotype of callithrix jacchus.the karotype of saguinus midas niger was studied by g-, c-, and nuclear organizer region (nor)-banding techniques. variations in c-banding patterns were observed in some chromosomes. the banding patterns obtained were compared with those previously described for callithrix jacchus. the two species differ by a reciprocal translocation involving pairs 9 and 16; by a paracentric inversion in chromosomes 1, 13, 14, 18, and 22; and by a pericentric inversion in at least four subtelocentric pairs (chr ...198831973446
prevalence and molecular phylogenetic characterization of trypanosoma (megatrypanum) minasense in the peripheral blood of small neotropical primates after a quarantine period.neotropical primates of the cebidae and callitrichidae, in their natural habitats, are frequently infected with a variety of trypanosomes including trypanosoma cruzi, which causes a serious zoonosis, chagas' disease. the state of trypanosome infection after a 30-day quarantine period was assessed in 85 squirrel monkeys (saimiri sciureus) and 15 red-handed tamarins (saguinus midas), that were wild-caught and exported to japan as companion animals or laboratory animals, for biomedical research, re ...200818576832
mycobacterium asiaticum infection in a red-handed tamarin (saguinus midas).a 4-yr-old, intact male red-handed tamarin (saguinus midas) was evaluated because of a 6-mo history of an enlarging axillary mass. diagnostic findings included a positive intradermal tuberculin test, persistent severe leukocytosis, and hyperglobulinemia. a nontuberculous mycobacterium species isolated from the mass was identified as mycobacterium asiaticum using 16s ribosomal dna sequencing and high-performance liquid chromatography.200617319146
colour discrimination learning in black-handed tamarin ( saguinus midas niger).colour is one cue that monkeys use for perceptual segregation of targets and to identify food resources. for fruit-eating primates such as saguinus, an accurate colour perception would be advantageous to help find ripe fruits at distance. the colour vision abilities of black-handed tamarins ( saguinus midas niger) were assessed through a discrimination learning paradigm using munsell colour chips as stimuli. pairs of chips were chosen from an early experiment with protan and deutan humans. the m ...200314593516
trypanosomatidae from wild mammals in the neotropical rainforest of french guiana.the initial filling of the reservoir behind the petit saut hydro-electric dam, on the sinnamary river in french guiana, threatened the terrestrial and arboreal animals living in the neotropical rainforest being flooded. during a rescue programme between 24 october and 12 november in 1994, many of these animals were checked for infection with trypanosomatids. overall, 45 blood samples and 54 skin biopsies were collected from 53 mammals (of 13 species representing five orders) and blood samples we ...200111299122
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 ...200010726261
mayaro virus fever in french guiana: isolation, identification, and seroprevalence.this paper reports the first isolation of mayaro (may) virus from a patient infected in french guiana. the identification was initially performed using immunofluorescent antibody testing with specific mouse antibody, and confirmed by plaque-reduction neutralization testing and reverse transcription-polymerase chain reaction. to determine if may virus infection is widespread in french guiana, a serosurvey was performed to determine the prevalence of antibody to this virus in various ethnic groups ...19989749643
beta2-microglobulin in neotropical primates (platyrrhini).nucleotide sequences for the three exons of the beta2-microglobulin (beta2m) gene (b2m) were determined for 135 animals representing 37 species and all 16 genera of neotropical primates (platyrrhini). twenty-eight different nucleotide sequences, encoding for 26 different proteins, were obtained. in comparison with those of other primate species, the beta2-microglobulins of the platyrrhini form a distinct clade. individual genera of neotropical primates have distinctive b2m sequences, but within ...19989634477
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 ...19948085615
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 ...19816802728
anion-exchange separation for neotropical trypanosomes: a preliminary trial and a description of trypanosoma devei from the tamarin saguinus midas niger.anion-exchange separation trials using deae-cellulose columns were performed with blood from two single species of marsupial and edentate, three species of rodent and single species of carnivore, primate, cayman and lizard. trypanosoma cruzi was isolated from didelphis marsupialis, dasypus novemcinctus and coendou sp. t. (megatrypanum) devei was isolated from the tamarin saguinus midas niger and the mensural characters of the organism were redescribed. anion-exchange separation was considered to ...19846429961
abo blood groups in a natural population of black-handed tamarins (saguinus midas niger).eighty-one black-handed tamarins from the tucurui region were tested for human type abo blood groups by salivary inhibition tests. eleven belonged to the a group, 45 to b, and 25 to ab. the serum samples were tested for the presence of agglutinins having specificities like those of humans. the abo system appeared to be polymorphic, with three alleles occurring at the following frequencies: a = 0.26, b = 0.66, and o = 0.08. the observed distribution fitted the expected on the basis of hardy-weinb ...19873103461
[behavioural and electrophysiological experiments on the sense of taste in saguinus midas tamarin (callitrichidae) (author's transl)].the activity in the gustatory nerve from the anterior part of the tongue, the chorda tympani proper nerve, has been recorded during stimulation of the tongue of a new world monkey, saguinus midas tamarin. a series of 0.3 m sugars and 0.07 m nacl, 0.07 m sucrose, 0.004 m acetic acid and 0.00005 m quinine hydrochloride were used as taste stimuli. the concentrations of the last four stimuli were the same as those earlier found to be the lowest concentrations at which this monkey in behavioural expe ...1977410707
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 ...201425130367
fruit availability, frugivore satiation and seed removal in 2 primate-dispersed tree species.during a mast-fruiting event we investigated spatial variability in fruit availability, consumption, and seed removal at two sympatric tree species, manilkara bidentata and m. huberi (sapotaceae) at nouragues natural reserve, french guiana. we addressed the question of how manilkara density and fruits at the community level might be major causes of variability in feeding assemblages between tree species. we thus explored how the frugivore assemblages differed between forest patches with contrast ...201121910838
the primate community of cachoeira (brazilian amazonia): a model to decipher ecological partitioning among extinct 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 ...201122076156
scaling the primate lateral geniculate nucleus: niche and neurodevelopment in the regulation of magnocellular and parvocellular cell number and nucleus stereological assessments of lateral geniculate nucleus (lgn) neuron numbers and volumes in five new world primates (cebus apella, saguinus midas niger, alouatta caraya, aotus azarae, and callicebus moloch) and compiled lgn volumes for an additional 26 mammals were analyzed for a better understanding of visual system evolution. both the magnocellular (m)- and the parvocellular (p)-cell populations scale allometrically with brain volume in primates, p cells with a significantly higher slope s ...201424222647
the banded karyotype of saguinus midas tamarin link, 1795 (callitrichidae, primates) 1977410711
variations in dental measurements between saguinus species and their systematic relationships.multivariate analysis is applied to dental measurements of saguinus species to analyse their systematic relationships. the shape distance between saguinus midas midas and s. midas niger is larger than that between s. nigricollis and s. fuscicollis, both of which are generally recognized as valid species. in dental form, s. bicolor is the closest relative of s. midas. s. inustus is not linked to s. leucopus. s. geoffroyi and s. leucopus, as s. inustus shows closer affinity with s. labiatus and s. ...19921612537
how do rivers, geographic distance, and dispersal behavior influence genetic structure in two sympatric new world monkeys?dispersal, one of the major factors affecting the gene flow between populations, shapes the spatial distribution of genetic diversity within species. alouatta macconnelli and saguinus midas are two neotropical monkey species that sympatrically inhabit the guiana shield in northern amazonia and are likely to differ in their dispersal behavior and vagility. we took advantage of their sympatry to investigate, over a fine geographical scale (∼50 km long), the relationship between spatial genetic str ...201728346698
observations of the tamarin saguinus midas. 19684972699
systematic, cross-cortex variation in neuron numbers in rodents and primates.uniformity, local variability, and systematic variation in neuron numbers per unit of cortical surface area across species and cortical areas have been claimed to characterize the isocortex. resolving these claims has been difficult, because species, techniques, and cortical areas vary across studies. we present a stereological assessment of neuron numbers in layers ii-iv and v-vi per unit of cortical surface area across the isocortex in rodents (hamster, mesocricetus auratus; agouti, dasyprocta ...201523960207
demodicosis in red-handed tamarins (saguinus midas).two nonrelated but paired red-handed tamarins (saguinus midas) presented with diffuse, multifocal, raised, nonpruritic, hyperkeratotic lesions on the appendages and face. skin biopsies identified acarids and skin scrapings confirmed demodex-like mites. the animals were treated with ivermectin, at the endoparasite dose, which initially resulted in resolution of clinical signs; however, signs recurred after numerous treatments. after four treatments with amitraz dips, demodicosis lesions resolved.200010982144
morphology and morphometry of the reproductive system of female saguinus midas (linnaeus, 1758).in this article, the reproductive system's morphology of three young animals of the species saguinus midas, from the bauxite mine in paragominas, is described. the specimens were fixed and preserved in a solution of 10% aqueous formaldehyde, followed by dissection, measurement of the genital organs (uterus, vagina, ovaries, and uterine tubes), and histological processing. the vulva is delimited by the labia, with a clitoris. it is lined by keratinized stratified squamous epithelium with sebaceou ...201222131285
esterase d in brazilian saguinus midas niger-results and comparison with previous studies in anthropoidea.four esterase d (esd) phenotypes, presumably resulting from the segregation of three alleles with moderate polymorphic frequencies, were observed in a sample of the black handed tamarin, saguinus midas niger, from the northern amazonian region (brazil). previous surveys in the non-human anthropoidea indicate that the esd locus is polymorphic in at least 4 of the 19 taxonomic entities listed.199031952426
successful treatment of generalized demodicosis in red-handed tamarins ( saguinus midas) using a single administration of oral fluralaner.two adult sibling red-handed tamarins ( saguinus midas) presented with weight loss and multifocal skin masses. a skin biopsy revealed pyogranulomatous dermatitis with intrafollicular demodex sp. mites. subsequent skin scrapes confirmed the presence of live mites within lesions. initial treatment with topical and oral ivermectin was unsuccessful, and lesions continued to progress. a single dose of fluralaner (bravecto®, merck animal health, kenilworth, new jersey, 07033, usa; 28.125 mg po) was ad ...201829900778
chromosome painting of the red-handed tamarin (saguinus midas) compared to other callitrichinae we present, for the first time, the complete chromosome painting map of saguinus midas, the red-handed tamarin. chromosome banding and painting with human chromosome-specific probes were used to compare the karyotype of this species with those of four other neotropical primates of the subfamily callitrichinae: leontopithecus rosalia, callithrix geoffroyi, c. penicillata, and mico argentatus. the chromosome painting map of s. midas was identical to that of l. rosalia and other previously stu ...201830222938
molecular identification of mesocestoides sp. metacestodes in a captive gold-handed tamarin (saguinus midas).mesocestoides spp. are tapeworms harbored in the intestine of many domestic and wild carnivores, birds of prey and, rarely, of humans. the life cycle is assumed to involve three hosts and the metacestode juvenile stage (tetrathyridium) may reproduce asexually, provoking severe systemic infections. in the present study, a case of a peritoneal infection by mesocestoides sp. occurred in a captive gold-handed tamarin (saguinus midas) is described. phylogenetic positions based on co1 and 12s loci wer ...201830110656
differential chromosomal organization between saguinus midas and saguinus bicolor with accumulation of differences the repetitive sequence dna.saguinus is the largest and most complex genus of the subfamily callitrichinae, with 23 species distributed from the south of central america to the north of south america with saguinus midas having the largest geographical distribution while saguinus bicolor has a very restricted one, affected by the population expansion in the state of amazonas. considering the phylogenetic proximity of the two species along with evidence on the existence of hybrids between them, as well as cytogenetic studies ...201728634866
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