| 3d-kinematics of vertical climbing in hominoids. | vertical climbing has played an important role in theories about the evolution of habitual bipedalism in early hominids and of locomotor specialization in hominoids. however, empirical data on vertical climbing in nonhuman primates are scarce, especially regarding kinematics. in this paper, the kinematics of flexed-elbow vertical climbing of four hominoid species are reported: western lowland gorillas (gorilla gorilla gorilla), bonobos (pan paniscus), sumatran orangutans (pongo pygmaeus abelii), ... | 2005 | 15386239 |
| trichuris suis and trichuris trichiura are different nematode species. | in this paper, a morphological and biometrical study by optical microscopy and scanning electronic microscopy (sem) of trichuris suis isolated from different hosts (sus scrofa domestica and sus scrofa scrofa) and trichuris trichiura isolated from chimpanzee, has been carried out. our results demonstrate the existence of typical pericloacal papillae in both species. biometrical parameters of t. suis and t. trichiura overlapped but males and females of t. trichiura tended to be shorter and thinner ... | 2009 | 19467214 |
| extrapair paternity in golden-cheeked gibbons (nomascus gabriellae) in the secondary lowland forest of cat tien national park, vietnam. | we observed 18 groups of golden-cheeked gibbons (nomascus gabriellae) in the secondary lowland forest in cat tien national park from january 2004 to december 2005 to obtain information about the social organization of this little-studied species, in an area where the population is recovering through increased protection and forest regeneration. dna from faecal samples of 10 infants and juveniles identified 1 case of extrapair paternity. dna from faecal samples of 18 adults from three communities ... | 2011 | 22116576 |
| object permanence tests on gibbons (hylobatidae). | ten gibbons of various species (symphalangus syndactylus, hylobates lar, nomascus gabriellae, and nomascus leucogenys) were tested on object permanence tasks. three identical wooden boxes, presented in a linear line, were used to hide pieces of food. the authors conducted single visible, single invisible, double invisible, and control displacements, in both random and nonrandom order. during invisible displacements, the experimenter hid the object in her hand before putting it into a box. the pe ... | 2008 | 19014264 |
| feeding behavior and activity budget of the southern yellow-cheeked crested gibbons (nomascus gabriellae) in a lowland tropical forest. | the southern yellow-cheeked crested gibbon (nomascus gabriellae), an endangered species native to vietnam and cambodia, lives exclusively in undisturbed tropical forests and depends primarily on ripe fruit for food. although this species is highly threatened, its ecology and conservation status remain relatively unknown. in order to understand how this heavily frugivorous primate adapts to the seasonal fluctuation of fruit resources in the forest, we collected feeding behavior and ranging activi ... | 2017 | 28431195 |
| [organization of loud calls (territorial vocalizations) during puberty, in male gibbon (hylobates concolor gabriellae)]. | the analysis of acoustic signals, in the loud calls of the subadult male, with gibbons (h. concolor gabriellae) shows several progressive modifications between the calls of the juvenile and those of the adult male. all the characteristics of antiphonal duos are not integrated at the same rate within the call of the adult male. | 1983 | 6412988 |
| the traits of the great calls in the juvenile and adolescent gibbon males nomascus gabriellae. | knowledge about vocal ontogeny and vocal plasticity during ontogeny in primate species is central to understanding the evolution of human speech. vocalizations in gibbons (hominoidea) are very interesting and contain complex species- and sex-specific patterns. however, ontogeny of gibbon songs is little studied. here, we document regular production and ontogenetic changes of female-specific "great call" in 4 immature (2 juvenile-c.a. 3 years old; and 2 adolescent-c.a. 5 years old) males of south ... | 2017 | 28296969 |
| meningoencephalitis with secondary obstructive hydrocephalus caused by probable coccidioides species in a buff-cheeked gibbon (nomascus gabriellae). | an 8-yr-old male buff-cheeked gibbon (nomascus gabriellae) acutely developed abnormal behavior, decreased appetite, and dull mentation. mild generalized muscle wasting and weight loss were the only other abnormalities noted on examination. routine immunodiffusion serology for coccidioides spp. were igg and igm positive. magnetic resonance imaging of the brain was suggestive of an infectious meningoencephalitis with secondary obstructive hydrocephalus. a ventriculoperitoneal shunt was placed in s ... | 2013 | 24063114 |
| development of the female great call in hylobates gabriellae: a case study. | although the structure of adult gibbon duet singing has been characterised in most species, little is known about the ontogeny of gibbon song. the present study describes the developmental trajectory of the female great call in a captive infant hylobates gabriellae female, on the basis of periodic tape recordings made while she participated in the duetting of her parents. the major part of great call development is completed between 5 and 32 months of age, and a differential time course is appar ... | 2006 | 10085516 |
| comparative analysis of xenobiotic metabolising n-acetyltransferases from ten non-human primates as in vitro models of human homologues. | xenobiotic metabolising n-acetyltransferases (nats) perform biotransformation of drugs and carcinogens. human nat1 is associated with endogenous metabolic pathways of cells and is a candidate drug target for cancer. human nat2 is a well-characterised polymorphic xenobiotic metabolising enzyme, modulating susceptibility to drug-induced toxicity. human nats are difficult to express to high purification yields, complicating large-scale production for high-throughput screens or use in sophisticated ... | 2018 | 29950659 |
| fur color change and hormonal development in captive females of northern white-cheeked (nomascus leucogenys) and buff-cheeked (nomascus gabriellae) gibbons. | gibbons of the genus nomascus exhibit strong sexual dichromatism in fur color. change of fur color in sub-adult wild nomascus females is associated with the onset of puberty and the time of their dispersal. the variability in fur change may be influenced by social factors. in this study, we determined whether in captive females of crested gibbons begin reproductive maturity prior to dispersing and with association to their fur color. we collected 287 fecal extracts to analyze pregnandiol -3- glu ... | 2019 | 31228419 |
| a first report of separation calls in southern yellow-cheeked gibbons (nomascus gabriellae) in captivity. | the effects of social separation, including vocalization, have been studied for a very long time in non-human primates under laboratory conditions. as part of the long-term research on the vocal behaviour of nomascus gibbons in zoos, this study provides the first record of calls of the southern yellow-cheeked gibbon (nomascus gabriellae) in response to involuntary separation. our study revealed that calls were also emitted by an infant (aged 1 year 8 months), and that the acoustic structure of t ... | 2020 | 33098481 |