| hypertrichosis in a gibbon (hylobates muelleri). | a case of facial hypertrichosis in a museum specimen of a bornean gibbon (hylobates muelleri) is described. apparently, hypertrichosis has not previously been reported to occur in nonhuman primates. similar pathological conditions are known to occur in humans, but it is unknown whether any of the numerous forms of human hypertrichosis is equivalent to this case in gibbons. | 1993 | 8289221 |
| reversible anesthesia of southeast asian primates with medetomidine, zolazepam, and tiletamine. | medetomidine (0.02-0.06 mg/kg) in combination with zolazepam-tiletamine (0.8-2.3 mg/kg) were evaluated for reversible anesthesia in four species of southeast asian primates: bornean orangutan (pongo pygmaeus pygmaeus), bornean gibbon (hylobates muelleri), long-tailed macaque (macaca fascicularis), and pig-tailed macaque (macaca nemestrina). twenty-three anesthetic procedures of captive-held and free-ranging primates were studied in sabah, malaysia. the induction was smooth and rapid. respiratory ... | 2006 | 17315446 |
| sexual swellings of female gibbons. | female gibbons were observed for labial swellings from march 2002 to august 2003. data were collected on length of time each female was swollen, changes in swelling period as females matured, and cycle length (number of days between onsets of consecutive swellings). data were also collected on the behaviour of the males when the females were swollen. there was a significant relationship between age of the female gibbon and number of days she had labial swelling. there was no significant relation ... | 2006 | 16912502 |
| the mobility of the human face: more than just the musculature. | the human face has the greatest mobility and facial display repertoire among all primates. however, the variables that account for this are not clear. humans and other anthropoids have remarkably similar mimetic musculature. this suggests that differences among the mimetic muscles alone may not account for the increased mobility and facial display repertoire seen in humans. furthermore, anthropoids themselves outpace prosimians in these categories: humans > other anthropoids > prosimians. this s ... | 2016 | 27870342 |
| genome size and constitutive heterochromatin in hylobates muelleri and symphalangus syndactylus and in their viable hybrid. | genome size was measured as the amount of feulgen-stained dna in six species of the family hylobatidae and in a hybrid of the gibbon (hylobates muelleri) and siamang (symphalangus syndactylus). the family, on the whole, exhibits a wider range of genome sizes than pongids; in particular, the siamang has about 15% more dna than the 44-chromosome hylobates species of the "lar" group. quantitative analysis of c-heterochromatin in hybrid metaphases showed that the difference in genome size of the par ... | 1988 | 3356160 |
| habitat use by a primate community in a lowland dipterocarp forest in danum valley, borneo. | knowledge of niche partitioning with respect to habitat is indispensable to understand the mechanism of coexistence of multiple species. among primates, however, data are still deficient because repeated survey for a sufficiently long time, covering seasonal changes over a large area, is the only way to clarify habitat segregation within a seasonally fluctuating environment. southeast asia is particularly interesting because of the supra-annual, highly unpredictable seasonality in fruiting known ... | 2020 | 32515849 |
| songs of hybrid gibbons (hylobates lar × h. muelleri). | two hybrid offspring, one male and one female, were produced by a hylobates muelleri female mated to a hylobates lar male at micke grove zoo, lodi, california. songs of the hybrids were studied at adulthood and compared to the parental-type songs. the hybrid female song is uniquely different from either parental type. the hybrid male song resembles the male song of h. lar, but contains an element that may be unique to h. muelleri. the study demonstrates the utility of sound-spectographic analysi ... | 1985 | 31986810 |
| brevity is not a universal in animal communication: evidence for compression depends on the unit of analysis in small ape vocalizations. | evidence for compression, or minimization of code length, has been found across biological systems from genomes to human language and music. two linguistic laws-menzerath's law (which states that longer sequences consist of shorter constituents) and zipf's law of abbreviation (a negative relationship between signal length and frequency of use)-are predictions of compression. it has been proposed that compression is a universal in animal communication, but there have been mixed results, particula ... | 2020 | 32431905 |
| limited directed seed dispersal in the canopy as one of the determinants of the low hemi-epiphytic figs' recruitments in bornean rainforests. | ficus species are keystone plants in tropical rainforests, and hemi-epiphytic figs play a notably important role in forest ecosystems. because hemi-epiphytic figs have strict germination requirements, germination and establishment stages regulate their populations. despite the ecological importance of hemi-epiphytic figs in the rainforests, seed dispersal systems by fig-eating animals under natural conditions remain unknown because of the difficulty in tracing the destiny of dispersed seeds in t ... | 2019 | 31194749 |
| understanding sources of variance and correlation among features of bornean gibbon (hylobates muelleri) female calls. | acoustic signals serve important functions in mate choice, resource defense, and species recognition. quantifying patterns and sources of variation in acoustic signals can advance understanding of the evolutionary processes that shape behavioral diversity more broadly. animal vocalization datasets are inherently multivariate and hierarchical, wherein multiple features are estimated from calls of many individuals across different recording locations. patterns of variation within different hierarc ... | 2018 | 30180677 |