| environmental correlates of ranging behaviour in the banded langur, presbytis melalophos. | data are presented from a long-term study of banded langurs in three contrasting rain forest habitats in peninsular malaysia. results from different sites and months are used to correlate ranging patterns with food availability and other environmental variables. day range lengths are correlated with availability of preferred foods; the degree of territoriality is related to the distribution and size of food sources and length of time for which any one of these produces favoured food items. | 1986 | 3557228 |
| melioidosis in a banded leaf-monkey (presbytis melalophos). | | 1984 | 6506434 |
| identification of a derived dental trait in the papionini relative to other old world monkeys. | variation in the shape of teeth provides an immense amount of information about the evolutionary history and adaptive strategy of a mammalian lineage. here, we explore variation in the expression of a purported molar lingual remnant (the interconulus) across the old world monkeys (primates: cercopithecidae) with the aim of elucidating a component of the adaptive radiation of this family. this radiation is characterized by a wide geographic range (asia and africa) as well as diverse dietary niche ... | 2014 | 25100299 |
| semicircular canal size and locomotion in colobine monkeys: a cautionary tale. | the semicircular canals of the inner ear constitute the organ of balance, tracking head rotation during movement and facilitating stabilisation of vision. morphological characteristics of the canals are correlated with agility scores related to locomotion. to date, however, the relationship between canal morphology and specific locomotor behaviours, such as leaping, is unclear. knowledge of such a relationship could strengthen the inferences of locomotion of extinct taxa. to test this, crania of ... | 2016 | 27780160 |
| do line-transect surveys systematically underestimate primate densities in logged forests? | the rate at which social groups of primates are encountered in disturbed rain forest may be biased relative to undisturbed rain forest. a recently reported case study revealed a 25% reduction in postlogging raw encounter rates even though the true density of primates remained at the prelogging level. if biased raw encounter rates are typical of disturbed forests, and if they translate into equally biased line-transect density estimates, results of many comparative surveys might prove misleading ... | 1987 | 31973482 |
| loud calls, startle behaviour, social organisation and predator avoidance in arboreal langurs (cercopithecidae: presbytis). | linking predator avoidance and social organisation predicts that large groups are favoured under heavy predation pressure but that small, inconspicuous groups may do equally well by avoiding detection altogether. we explored the relationships between antipredator behaviour (vocalisation, concealment, fleeing), detectability (colouration, group size) and social organisation in arboreal langurs. three clear antipredation conditions emerged: (1) exemplified by presbytis melalophos--brightly-coloure ... | 2012 | 23363588 |
| phylogenetic relationships of leaf monkeys (presbytis; colobinae) based on cytochrome b and 12s rrna genes. | little is known about the classification and phylogenetic relationships of the leaf monkeys (presbytis). we analyzed mitochondrial dna sequences of cytochrome b (cyt b) and 12s rrna to determine the phylogenetic relationships of the genus presbytis. gene fragments of 388 and 371 bp of cyt b and 12s rrna, respectively, were sequenced from samples of presbytis melalophos (subspecies femoralis, siamensis, robinsoni, and chrysomelas), p. rubicunda and p. hosei. the genus trachypithecus (cercopitheci ... | 2011 | 21365553 |
| experimental transmission of subperiodic wuchereria bancrofti to the leaf monkey (presbytis melalophos), and its periodicity. | infective larvae of nocturnally subperiodic wuchereria bancrofti were obtained from laboratory-raised aedes togoi mosquitoes which had fed on an infected human volunteer from kanchanaburi, thailand, and 471 of them were inoculated subcutaneously into the inguinal regions of an immunosuppressed presbytis melalophos. microfilaremia was first detected 287 days after inoculation, and 77 days later, at 364 days of infection, the number of microfilariae determined at 2-hour intervals reached a maximum ... | 1982 | 6805349 |
| studies on the chemoprophylaxis of subperiodic brugia malayi infection in the leaf monkey (presbytis melalophos) with diethylcarbamazine citrate. | the chemoprophylactic use of diethylcarbamazine citrate at total oral doses of 15--180 mg/kg body weight was tested against subperiodic brugia malayi infection in the leaf monkey (presbytis melalophos). a total dose of 45 mg/kg body weight given over 9 days killed all developing infective larvae. similarly, a total dose of 35 mg/kg body weight given over 7 days killed all fourth stage larvae. the minimum effective dose that prevents infection would be 5 mg/kg body weight daily for 7 days every m ... | 1983 | 6415950 |
| tetrapetalonema (sandnema) digitata (chandler, 1929) chabaud & bain, 1976, infection in the banded leaf monkey, presbytis melalophos (raffles) in peninsular malaysia. | | 1985 | 4095616 |
| experimental infection of the leaf-monkeys, presbytis cristata and presbytis melalophos with subperiodic brugia malayi. | the leaf-monkeys, presbytis cristata and presbytis melalophos, experimentally infected with subperiodic brugia malayi, have been used for studies on the pathoimmunology of the infection and the screening of potential filaricides during the last 6-8 years, and considerable information on the pattern of microfilaraemia and adult worm recoveries have been obtained. the prepatent periods in 97 p. cristata and 45 p. melalophos, each infected with about 200 infective larvae, were similar, these being ... | 1990 | 1973024 |
| locomotor behavior and muscular anatomy of sympatric malaysian leaf-monkeys (presbytis obscura and presbytis melalophos). | sympatric malaysian leaf-monkeys, presbytis obscura and presbytis melalophos show quantitative differences in their use of different locomotor patterns during daily activities. p. obscura primarily moves quadrupedally along large boughs; p. melalophos relies more on leaping between smaller supports. p. melalophos also uses forelimb suspension more than does p. obscura. comparison of the muscular anatomy of the shoulder, arm, trunk, hip and thigh show numerous statistically significant difference ... | 1977 | 403773 |
| differential detectability of primates between primary and selectively logged habitats and implications for population surveys. | much information has been published concerning the accurary of various techniques commonly used for censusing primates. the sources of bias may vary according to the technique used. accuracy may depend on population density as well as on differential visibility and hence detectability between areas. this paper provides evidence that primates may alter their behavior between areas of primary and selectively logged habitat, which in turn could affect census results. adoption of cryptic behavior, c ... | 1985 | 31986823 |
| is malaysia's banded langur, presbytis femoralis femoralis, actually presbytis neglectus neglectus? taxonomic revision with new insights on the radiation history of the presbytis species group in southeast asia. | the disjunct distribution of presbytis femoralis subspecies across sumatra (p. f. percura), southern (p. f. femoralis) and northern (p. f. robinsoni) peninsular malaysia marks the unique vicariance events in the sunda shelf. however, the taxonomic positions and evolutionary history of p. f. femoralis are unresolved after decades of research. to elucidate this evolutionary history, we analyzed 501 base pairs of the mitochondrial hvsi gene from 25 individuals representing malaysia's banded langur, ... | 2019 | 30471014 |