| hand preference in the use and manufacture of tools by tufted capuchin (cebus apella) and lion-tailed macaque (macaca silenus) monkeys. | the purpose of this study was to examine hand preference in the use and manufacture of probing tools by tufted capuchin and lion-tailed macaque monkeys (cebus apella and macaca silenus). hand preference for the tool-using sequence was noted in 4 of 5 capuchins (a left-hand preference was noted in 3 ss) and 3 of 4 macaques (a left-hand preference was noted in 2 ss). the monkeys frequently used bimanual action in the initial and final segments of the 3-component task and typically modified tools t ... | 1991 | 1688332 |
| lion-tailed macaques (macaca silenus) manufacture and use tools. | lion-tailed macaques (macaca silenus) in captive social groups spontaneously manufactured and used tools to extract syrup from an apparatus that was designed to accommodate probing behavior. an attempt to replicate these findings with mandrills (mandrillus sphinx) was unsuccessful. this report is the first to describe spontaneous manufacture of tools in any group of old world monkeys and provides evidence of greater continuity among primates for the expression of complex cognitive abilities. the ... | 1988 | 3396313 |
| fulminant streptococcus pneumoniae meningitis in a lion-tailed macaque (macaca silenus) without detected signs. | a 3-month-old lion-tailed macaque (macaca silenus) infant that died on 2 february 1985 in the baltimore zoo (baltimore, maryland, usa) due to fulminating streptococcus pneumoniae meningitis had congested, edematous lungs, and thickened and congested brain leptomeninges with a grayish-yellow fluid within the subarachnoid brain space. from bacterial cultures made postmortem of the subarachnoid brain space fluid, cerebrospinal fluid, throat secretions, nasal secretions, and lung fluid, we isolated ... | 1995 | 7563429 |
| an outbreak of streptococcus equi ssp. zooepidemicus infection of probable human origin in wanderoos (macaca silenus)--case report. | three out of ten young to adult wanderoos (m. silenus) of a breeding colony at the rheine zoo died within two days from a peracute illness, characterized by salivation, vomiting, apathy and minor cns symptoms. streptococcus equi ssp. zooepidemicus was isolated in pure cultures from all organs of two animals investigated bacteriologically. the strains were penicillin-susceptible, and penicillin treatment of all remaining animals cured two already sick animals and prevented further cases. a volunt ... | 1997 | 9361390 |
| gongylonema macrogubernaculum in captive african squirrels (funisciurus substriatus and xerus erythropus) and lion-tailed macaques (macaca silenus). | necropsies performed between 1989 and 1995 on 15 african rope squirrels (funisciurus substriatus) and 20 african ground squirrels (xerus erythropus) from the baltimore zoo revealed 13 cases of gongylonemiasis. nematodes were embedded in the epithelium of the esophagus, pharynx, buccal mucosa, and tongue, resulting in varying degrees of esophagitis, pharyngitis, stomatitis, and glossitis, respectively. routine fecal examinations were negative, and the nematodes appeared to be unaffected by repeat ... | 1998 | 9809609 |
| retrospective analysis of an outbreak of b virus infection in a colony of debrazza's monkeys (cercopithecus neglectus). | in 1981, an outbreak of herpetic disease developed in a colony of debrazza's monkeys (cercopithecus neglectus). in seven of eight infected animals, clinical signs of infection included vesicular and ulcerative lesions on the lips, tongue, and/or palate. histologic examination of lesions revealed intranuclear inclusion bodies, and electron microscopy revealed nucleocapsids and virions with typical herpesvirus morphology. although a virus was isolated that appeared similar to monkey b virus, techn ... | 2000 | 11200573 |
| behavioural responses of lion-tailed macaques (macaca silenus) to a changing habitat in a tropical rain forest fragment in the western ghats, india. | this study reports critical changes in the behaviour patterns of lion-tailed macaques (macaca silenus) inhabiting a continuously changing and deteriorating rain forest fragment in the western ghats, india. the study area, a privately owned rain forest patch in a tea/coffee garden called puthuthotam, has suffered two massive selective logging episodes. over the years, the native rain forest trees have been largely replaced by non-native/pioneer species resulting in loss of canopy contiguity and s ... | 2001 | 11805424 |
| food resources, distribution and seasonal variations in ranging in lion-tailed macaques, macaca silenus in the western ghats, india. | the distribution and availability of food was examined to see how it influenced ranging patterns and sleeping site selection in a group of lion-tailed macaques. the home range and core area were 130.48 ha (95% kernel) and 26.68 ha (50% kernel) respectively. the lion-tailed macaques had a longer day range, had a greater number of sleeping sites and used more core areas in the summer as compared to the monsoon and the post-monsoon seasons. the ranging patterns and sleeping site use were influenced ... | 2015 | 25217980 |
| identification of a non-steroidal estrogen, equol, in the urine of pregnant macaques: correlation with steroidal estrogen excretion. | macaque urinary estrogens at late pregnancy were separated by high performance liquid chromatography and quantified, both with radioimmunoassay and an in vitro uterine estrogen receptor assay. five estrogens were measured. four were steroids: estriol, estrone, 17 beta-estradiol, and 16 alpha-hydroxyestrone. the fifth was a flavonoid, equol, a metabolite of plant isoflavonoids, formononetin and genistein. by mass, estrone and equol were the predominant urinary estrogens, with equol reaching level ... | 1984 | 6708557 |
| trypanosoma cruzi infection of free-ranging lion-tailed macaques (macaca silenus) and ring-tailed lemurs (lemur catta) on st. catherine's island, georgia, usa. | free-ranging old world primates released on st. catherine's island, georgia (usa), were tested for infection with trypanosoma cruzi as part of a study of the epizootiology of sylvatic t. cruzi in the southeastern usa. the parasite was observed in liver infusion tryptose medium cultures of blood from seven of 11 lion-tailed macaques (macaca silenus) and one of 19 ring-tailed lemurs (lemur catta). cultures of blood from 10 black and white ruffed lemurs (varecia variegata) were all negative. analys ... | 1998 | 9638621 |
| prevalence of shigellosis and other enteric pathogens in a zoologic collection of primates. | an epidemiologic study of shigellosis was the preliminary step in the formulation of a plan for the control of devastating infectious diseases in nonhuman primates at the national zoological park. data were collected from primate groups with enzootic shigellosis and included the following species: white-cheeked and siamong gibbons (hylobates concolor and h syndactylies); lion-tailed, celebes, and barbary macaques (macaca silenus, m nigera, and m sylvanus); black and white colobus monkeys (colobu ... | 1993 | 8407446 |
| distribution of human endogenous retrovirus herv-k genomes in humans and different primates. | the distribution of the human endogenous retrovirus (herv)-k genome was investigated by southern-blot analyses using a herv-k-env dna probe. with the exception of one dna-sample, obtained from a chinese individual in whom an amplification of herv-k was detected, southern-blot analyses yielded identical hybridization patterns with dna from peripheral blood lymphocytes of 37 normal healthy blood donors, with dna from six tumor cell lines, or with 23 dna samples prepared from various carcinoma tiss ... | 1995 | 7635468 |
| motor activity of different-aged cercopithecidae: silvered-leaf monkey (presbytis cristatus esch.), lion-tailed monkey (macaca silenus l.), moor macaque (macaca maura cuv.) as observed in the zoological garden, berlin (west). | the activity of different-aged monkeys belonging to three species of cercopithecidae was quantitatively analyzed in a 1 1/2-year study. the species, silvered-leaf monkey (presbytis cristatus esch.), lion-tailed monkey (macaca silenus l.) and moor macaque (macaca maura cuv.) were observed in the zoological garden, berlin (west). the data of a combined cross-sectional analysis across all three species indicate that the course of age-related changes in the frequency of movement can be depicted as g ... | 1986 | 3721206 |
| comparative analyses of age- and sex-specific patterns of vocal behaviour in four species of old world monkeys. | sound recordings and behavioural data were collected from four primate species of two genera (macaca, presbytis). comparative analyses of structural and behavioural aspects of vocal communication revealed a high degree of intrageneric similarity but striking intergeneric differences. in the two macaque species (macaca silenus, macaca radiata), males and females shared the major part of the repertoire. in contrast, in the two langurs (presbytis johnii, presbytis entellus), many calls were exclusi ... | 1991 | 1885113 |
| molecular phylogeny and evolutionary history of southeast asian macaques forming the m. silenus group. | the 12 presently recognized taxa forming the macaca silenus group represent the most diverse lineage within the genus macaca. the present study was set up to clarify the phylogenetic relationships of the extant members of the m. silenus group and to explain their geographical distribution patterns seen today. a combined approach involving the analysis of one paternal (tspy) and two maternal (cyt b and 12s-16s rrna) molecular markers enabled us to resolve the phylogenetic relationships within thi ... | 2007 | 17208017 |
| vocal communication in lion-tailed macaques (macaca silenus). | investigations of vocal communication in captive groups of lion-tailed macaques (macaca silenus) revealed a repertoire of 17 basic patterns. sixteen of them were recorded and their physical parameters analysed by sonagrams. during a field study these results were verified and complemented, and additional data on the vocal behaviour of this species were gathered. the vocal repertoire of lion-tailed macaques is characterized by discretely structured, mostly interaction- and situation-specific soun ... | 1985 | 3833623 |
| monitoring ovulation and implantation in the lion-tailed macaque (macaca silenus) through urinary estrone conjugate evaluations. | urine samples were collected daily during ten nonfertile and four fertile ovarian cycles of four adult female lion-tailed macaques (macaca silenus). urine was analyzed for concentrations of total immunoreactive estrogen (et), estrone conjugates, and bioactive luteinizing hormones (lh). the estrone conjugates of selected samples were separated by high-performance liquid chromatography (hplc) to evaluate the relative proportions of estrone glucuronide (e1 g) to estrone sulfate (e1 s) contributing ... | 1983 | 6640039 |
| variation of the melanocortin 1 receptor gene in the macaques. | melanocortin 1 receptor (mc1r), a g-coupled seven-transmembrane receptor protein, plays a key role in the regulation of melanin synthesis in mammals. sequence variation of the mc1r gene (mc1r) has been associated with pigmentation phenotypes in humans and in several animal species. the macaques (genus macaca) are known to show a marked inter-specific variation in coat color although the causative genetic variation remains unclear. we investigated nucleotide sequences of the mc1r in 67 individual ... | 2008 | 18454455 |
| behavioral contrasts between male cynomolgus and lion-tailed macaques. | evidence indicates that primate species differ not only in social structure and concordant social propensities, but also in their approach toward novel objects, environments, and procedures. these differences in response dispositions have been described as being based on differences in characteristic stances toward the environment, also called temperaments. this report extends previous comparative primate research by describing behavioral contrasts observed among males of two macaque species, li ... | 1993 | 31941200 |
| thoracolumbar hemilaminectomy and spinal cord decompression in a lion-tailed macaque (macaca silenus). | a 16-yr-old, castrated male lion-tailed macaque (macaca silenus) presented with acute bilateral pelvic limb paralysis. cisternal and lumbar myelograms demonstrated right-sided spinal cord compression at t13-l1. during an extradural hemilaminectomy, chronically ruptured disk material was removed at t13-l1, with moderate venous dilatation observed cranially. the macaque fully recovered from clinical signs within 2 mo. | 2008 | 18634223 |
| perseveration on a reversal-learning task correlates with rates of self-directed behavior in nonhuman primates. | in humans and several nonhuman animals, repetitive behavior is associated with deficits on executive function tasks involving response inhibition. we tested for this relationship in nonhuman primates by correlating rates of normative behavior to performance on a reversal-learning task in which animals were required to inhibit a previously learned rule. we focused on rates of self-directed behavior (scratch, autogroom, self touch and manipulation) because these responses are known indicators of a ... | 2011 | 21419808 |
| the response of the frugivorous lion-tailed macaque (macaca silenus) to a period of fruit scarcity. | tropical rainforests show seasonal fluctuations in the abundance of fruits resulting in periods of resource scarcity for frugivores. we examined the response of an obligate frugivore, the lion-tailed macaque (ltm) (macaca silenus), to a period of fruit scarcity in a rainforest in the western ghats, india. we estimated the abundance and distribution of fruit resources from food tree densities obtained from 348 point centered quadrats, and fruit availability from phenological monitoring of 195 tre ... | 2011 | 21898517 |
| human presence increases parasitic load in endangered lion-tailed macaques (macaca silenus) in its fragmented rainforest habitats in southern india. | understanding changes in the host-parasite relationship due to habitat fragmentation is necessary for better management and conservation of endangered species in fragmented landscapes. pathogens and parasites can pose severe threat to species in restricted environments such as forest fragments where there is increased contact of wildlife with human and livestock populations. environmental stress and reduced nutritional level in forest fragments can influence parasite infection and intensity on t ... | 2013 | 23717465 |
| draft genome sequence of campylobacter corcagiensis strain cit045t, a representative of a novel campylobacter species isolated from lion-tailed macaques (macaca silenus). | campylobacter corcagiensis cit045(t) (=ccug 64942(t), lmg 27932(t)), a new member of the campylobacter genus, has recently been isolated from lion-tailed macaques in cork, ireland. to further characterize this new species and its potential pathogenicity, the genome sequence of c. corcagiensis was determined and is presented here. | 2014 | 24744327 |
| inference by exclusion in lion-tailed macaques (macaca silenus), a hamadryas baboon (papio hamadryas), capuchins (sapajus apella), and squirrel monkeys (saimiri sciureus). | previous research has suggested that several primate species may be capable of reasoning by exclusion based on the finding that they can locate a hidden object when given information about where the object is not. the present research replicated and extended the literature by testing 2 old world monkey species, lion-tailed macaques (macaca silenus) and a hamadryas baboon (papio hamadryas), and 2 new world species, capuchin monkeys (sapajus apella) and squirrel monkeys (saimiri sciureus). the new ... | 2015 | 26010194 |
| pre-historic and recent vicariance events shape genetic structure and diversity in endangered lion-tailed macaque in the western ghats: implications for conservation. | genetic isolation of populations is a potent force that helps shape the course of evolution. however, small populations in isolation, especially in fragmented landscapes, are known to lose genetic variability, suffer from inbreeding depression and become genetically differentiated among themselves. in this study, we assessed the genetic diversity of lion-tailed macaques (macaca silenus) inhabiting the fragmented landscape of anamalai hills and examined the genetic structure of the species across ... | 2015 | 26561307 |
| resource partitioning in sympatric langurs and macaques in tropical rainforests of the central western ghats, south india. | in a competitive sympatric association, coexisting species may try to reduce interspecific interactions as well as competition for similar resources by several ecological and behavioral practices. we studied resource utilization of three sympatric primate species namely, lion-tailed macaques (macaca silenus), bonnet macaques (m. radiata) and hanuman langurs (semnopithecus entellus) in a tropical rainforest of the central western ghats, south india. we studied resource use, tree-height use, forag ... | 2011 | 21328592 |
| diet and dietary-niche breadth of diurnal rain forest primates in the central western ghats, india. | we studied the feeding ecology of 3 sympatric primate species, the lion-tailed macaque (macaca silenus), bonnet macaque (macaca radiata) and hanuman langur (semnopithecus entellus), in a tropical rain forest of the central western ghats, india. since the availability of leaves is much higher than that of fruits, we expected that the primarily folivorous langurs would use a larger number of resources than the primarily frugivorous macaques. since fruits are a relatively total resource, unlike lea ... | 2011 | 22472629 |
| analysis of the complete mitochondrial genome and characterization of diverse numts of macaca leonina. | as a non-human primate, the pig-tailed macaque has received wide attention because it can be infected by hiv-1. in this study, we determined the complete mtdna sequence of the northern pig-tailed macaque (macaca leonina). unexpectedly, during the amplification of the mtdna control region (d-loop region) we observed several d-loop-like sequences, which were numts (nuclear mitochondrial sequences) and a total of 14 d-loop-like numt haplotypes were later identified in five individuals. the neighbor ... | 2015 | 26151895 |
| campylobacter corcagiensis sp. nov., isolated from faeces of captive lion-tailed macaques (macaca silenus). | an investigation of the prevalence of campylobacter ureolyticus in a variety of animals led to the identification of the strain cit 045(t), in the faeces of captive lion-tailed macaques (macaca silenus). originally, believed to be campylobacter ureolyticus based on the colony morphology and positive urease test, analysis of 16s rrna and hsp60 gene sequences of this isolate revealed that the strain differs significantly from other species of the genus campylobacter described to date. species-spec ... | 2014 | 24876239 |
| Picture recognition of food by macaques (Macaca silenus). | Pictorial representations of three-dimensional objects are often used to investigate animal cognitive abilities; however, investigators rarely evaluate whether the animals conceptualize the two-dimensional image as the object it is intended to represent. We tested for picture recognition in lion-tailed macaques by presenting five monkeys with digitized images of familiar foods on a touch screen. Monkeys viewed images of two different foods and learned that they would receive a piece of the one t ... | 2011 | 21918870 |
| glycan stem-cell markers are specifically expressed by spermatogonia in the adult non-human primate testis. | the glycan cell surface molecules, stage-specific embryonic antigen (ssea)-1, -3 and -4 and tumor-rejection antigen (tra)-1-60 and -1-81, are expressed in specific combinations by undifferentiated pluripotent cells, i.e. embryonic stem cells, induced pluripotent stem cells, embryonal carcinoma cells, primordial germ cells and embryonic germ cells. upon differentiation of the cells, these markers vanish. recently, it has been shown that also neonatal and adult mouse testes contain pluripotent cel ... | 2008 | 18621756 |
| dominance hierarchy and social grooming in female lion-tailed macaques (macaca silenus) in the western ghats, india. | this article reports the structure of dominance and its relationship with social grooming in wild lion-tailed macaque females. the strength of dominance hierarchy was 0.79 on a scale of 0 to 1 indicating a moderate linearity in the ranking system. dominance scores were converted into an ordinal as well as an interval scale. grooming scores were also converted into interval scales using standard scores. grooming received and grooming given correlated positively and negatively respectively with do ... | 2006 | 17006020 |
| population dynamics of a group of lion-tailed macaques (macaca silenus) inhabiting a rainforest fragment in the western ghats, india. | we observed the overall population dynamics and number of births and deaths in identified individuals between january 2002 and october 2005, in a large group of lion-tailed macaques in the anaimalai hills of the western ghats in the south indian state of tamilnadu. the group inhabited an isolated rainforest fragment located inside a private tea/coffee garden. the group size increased from 56 in january 2002 to 84 in october 2005. all females reproduced, and the interbirth interval was 23.18 mont ... | 2006 | 16912506 |
| visual information processing in the lion-tailed macaque (macaca silenus): mental rotation or rotational invariance? | mental rotation is a widely accepted concept indicating an image-like mental representation of visual information and an analogue mode of information processing in certain visuospatial tasks. in the task of discriminating between image and mirror-image of rotated figures, human reaction times increase with the angular disparity between the figures. in animals, tests of this kind yield inconsistent results. pigeons were found to use a time-independent rotational invariance, possibly indicating a ... | 2005 | 15677862 |
| distribution, population structure, and conservation of lion-tailed macaques (macaca silenus) in the anaimalai hills, western ghats, india. | the lion-tailed macaque is an endangered species, and hence it is necessary that the remaining populations in the rainforests of the western ghats, india, be located and their habitats assessed for effective conservation. the anaimalai hills in the state of tamil nadu harbor 31 groups of lion-tailed macaques. however, the rainforest in these hills is highly fragmented. since lion-tailed macaques are typically arboreal, the groups have become isolated. two large rain-forest complexes in these hil ... | 2002 | 12111684 |
| use of enclosure space by captive lion-tailed macaques (macaca silenus) housed in indian zoos. | captive nonhuman animals use enclosure space differentially. enclosure features strongly influence this. this study recorded both the enclosure space used by 47 captive lion-tailed macaques housed in 13 zoos across india and the behavior of the macaques. the exhibition of abnormal behaviors, food-related behaviors, and social interactions correlated significantly with the use of the edge zone (the part of the enclosure closest to the visitor area). animals housed in barren enclosures used the ed ... | 2005 | 16468946 |
| personality traits in captive lion-tailed macaques (macaca silenus). | personality influences an individual's perception of a situation and orchestrates behavioral responses. it is an important factor in elucidating variation in behavior both within and between species. the major focus of this research was to test a method that differs from those used in most previous personality studies, while investigating the personality traits of 52 captive lion-tailed macaques from four zoos. in this study, data from behavioral observations, a p-type principal components analy ... | 2005 | 16229004 |
| rheumatoid-like arthritis in a lion tailed macaque. | very few satisfactory models of rheumatoid arthritis (ra) exist in nonhuman species. it is particularly striking that nonhuman primates have only rarely been described to have disease processes resembling classic ra seen in humans. we describe the case of a lion tailed macaque (macaca silenus), housed at the national zoological park in washington dc, that had a polyarticular inflammatory arthropathy resembling ra. gross and histopathologic examination of necropsy tissues and radiographic finding ... | 1991 | 1941834 |
| brief communication: morphometric data for adult lion-tailed macaques (macaca silenus). | basic morphometric data were collected from 22 adult lion-tailed macaques (m. silenus) of both sexes. m. silenus is a rare primate species from which adequate morphometric data have not heretofore been available for comparative purposes. data collected include measures of gross body size (weight; crown-rump and rump-heel length), and for males, measures of secondary sexual characteristics (canine tooth and testes size). degree of sexual dimorphism was marked, with males significantly larger and ... | 1991 | 1882986 |
| viable spermatozoa in the bladder after electroejaculation of lion-tailed macaques (macaca silenus). | the bladder of 6 lion-tailed macaques was emptied and flushed with sterile saline. talp-hepes buffer was infused and the animals were electroejaculated. after electroejaculation, the semen quality was determined in the ejaculate and the bladder infusate. of the 15 ejaculates analysed, a mean (+/- s.e.m.) sperm count of 133.8 (+/- 30.7) x 10(6) with 69.5 (+/- 6.0)% motility was obtained in the infusate as compared to the sperm count of 72.4 (+/- 38.6) x 10(6) with significantly lower (47.7 +/- 5. ... | 1989 | 2760902 |
| application of dna fingerprinting probes to old world monkeys. | analysis of tandem-repetitive minisatellite dna in humans provides great discriminatory power in paternity identification and individualization of tissue samples. the molecular probes used to study these hyper-variable loci are here applied to dna isolated from related animals in four species of old world monkeys. probes 33.6 and 33.15 are shown to cross-hybridize with variable minisatellites in macaca fuscata, macaca silenus, erythrocebus patas, and colobus guereza. the dna fingerprint patterns ... | 1988 | 31968875 |
| prevalence of gastrointestinal parasites in lion-tailed macaque macaca silenus in central western ghats, india. | this study examines gastrointestinal parasites in the endangered lion-tailed macaque, which is sympatric with the bonnet macaque that has relocated from nearby towns or agriculture landscapes dominated by humans and livestock. one hundred and ninety-four fresh fecal samples from lion-tailed macaques were collected from a group located at chiksuli in the central western ghats. of these, 48.5% had at least one endoparasite taxon. the prevalence of endoparasites varied from 0 to 75.0%, and observed ... | 2019 | 31468227 |
| deceased-infant carrying in nonhuman anthropoids: insights from systematic analysis and case studies of bonnet macaques (macaca radiata) and lion-tailed macaques (macaca silenus). | existing models of attachment do not explain how death of offspring affects maternal behavior. previous descriptions of maternal responsiveness to dead offspring in nonhuman anthropoids have not expounded the wide variation of deceased-infant carrying (dic) behavior. through the current study, we attempt to (a) identify determinants of dic through a systematic survey across anthropoids, (b) quantitatively assess behavioral changes of mother during dic, and (c) infer death perception of conspecif ... | 2019 | 30307263 |
| serological diagnosis of baylisascaris procyonis in primates using a human elisa test. | the usefulness of a human enzyme-linked immunosorbent assay (elisa) for serological diagnosis of baylisascaris procyonis larva migrans was assessed in nonhuman primates (nhp). the test was originally developed as an assay performed on human samples at purdue university. six participating zoos submitted 258 nhp serum samples, spanning these major phylogenetic groups: 1) great apes (n = 84), 2) lesser apes (n = 17), 3) old world monkeys (n = 84), 4) new world monkeys (n = 20), and 5) prosimians (n ... | 2019 | 31260208 |
| changing ecologies, shifting behaviours: behavioural responses of a rainforest primate, the lion-tailed macaque macaca silenus, to a matrix of anthropogenic habitats in southern india. | with the uncontrolled expansion of anthropogenic modifications of the environment, wildlife species are forced to interact with humans, often leading to conflict situations that have detrimental effects for both wildlife and humans. such interactions are escalating globally, making it crucial for us to devise strategies for both, the management of conflict and the conservation of these often-threatened species. we studied a case of potentially detrimental human-wildlife interactions between an e ... | 2020 | 32966281 |
| morphology of the lingual papillae of the lion-tailed macaque. | we microscopically examined the dorsal lingual surface of an adult lion-tailed macaque (macaca silenus). the tongue of the chimpanzee was about 13 cm long. filiform papillae on the lingual apex consisted of several pointed processes. there were dome-shaped fungiform papillae scattered among the filiform papillae. the connective tissue cores of those filiform papillae consisted of processes of various size, while these of the fungiform papillae had several ditches. the vallate papilla was surroun ... | 2018 | 30504649 |
| the demography of the lion-tailed macaque (macaca silenus) in rain forest fragments in the anamalai hills, south india. | we examined demographic consequences of habitat fragmentation in the lion-tailed macaque in the anamalai hills in southern western ghats. the parameters examined were group size, age/sex composition, and birth rate, in relation to various habitat parameters. demographic parameters were estimated for 11 groups in 8 rain forest fragments, during january to may 1996. area, tree density, canopy cover, canopy height, and tree basal area were estimated for these fragments. as fragment area decreased, ... | 2000 | 30545164 |
| manipulation of objects in a captive group of lion-tailed macaques (macaca silenus). | the purpose of this study was to investigate the manipulative propensities of a captive group of lion-tailed macaques (macaca silenus). simple natural objects (browse and bamboo poles) were provided regularly in the home cage. findings indicate richness in the frequency and form of manipulative activities, with juvenile males manipulating the test objects more frequently and exhibiting more goal-directed manipulative activity than adult females. a variety of goal-directed manipulative activities ... | 1987 | 31973501 |
| cerebral palsy in a macaque monkey. | magnetic resonance imaging was used to document brain lesions symptomatic of cerebral palsy in the macaque monkey exhibiting poor motor control and periodic episodes of ocular nystagmus and convulsive twitching. neuroanatomic deficits most likely resulted from hemorrhage or ischemic infarction at or near the time of birth. extreme maternal dependency and retarded behavioral development were documented at 3 and 12 months of age. both social and motor behavior improved significantly when observed ... | 1988 | 31973448 |
| mhc class ii drb sequences of lion-tailed macaques (macaca silenus). | the lion-tailed macaque (macaca silenus) is an endangered species. research into the genetics of this species is important as a basis for coordinated breeding programs of captive populations. therefore, we sought to analyze the mhc class ii drb genes of this species because of it is highly polymorphic in genetically heterogeneous populations of most species. ten individuals from seven families were evaluated. nine drb second exon sequences belonging to eight allelic lineages were identified. the ... | 2003 | 12956883 |