| a new form of tool use by orang-utans in sabah, east malaysia. | | 1994 | 7813972 |
| health evaluation of free-ranging and semi-captive orangutans (pongo pygmaeus pygmaeus) in sabah, malaysia. | baseline data on health of free-ranging wildlife is essential to evaluate impacts of habitat transformation and wildlife translocation, rehabilitation, and reintroduction programs. health information on many species, especially great apes, is extremely limited. between 1996 and 1998, 84 free-ranging orangutans captured for translocation, underwent a complete health evaluation. analogous data were gathered from 60 semi-captive orangutans in malaysia. baseline hematology and serology; vitamin, min ... | 2003 | 12685070 |
| recent surveys in the forests of ulu segama malua, sabah, malaysia, show that orang-utans (p. p. morio) can be maintained in slightly logged forests. | today the majority of wild great ape populations are found outside of the network of protected areas in both africa and asia, therefore determining if these populations are able to survive in forests that are exploited for timber or other extractive uses and how this is managed, is paramount for their conservation. | 2010 | 20634974 |
| parasites found from the feces of bornean orangutans in danum valley, sabah, malaysia, with a redescription of pongobius hugoti and the description of a new species of pongobius (nematoda: oxyuridae). | in order to obtain basic data on parasitic infections of bornean orangutans, pongo pygmaeus morio (owen, 1837), in danum valley, sabah, malaysia, fecal examinations were conducted. based on a total of 73 fecal samples from 25 individuals, cysts of entamoeba coli, entamoeba spp., and chilomastix mesnili, cysts and trophozoites of balantidium coli, and eggs of trichuris sp. or spp., unknown strongylid(s), strongyloides fuelleborni, and an unknown oxyurid, plus a rhabditoid larva of strongyloides s ... | 2010 | 20950104 |
| fatality of a wild bornean orangutan (pongo pygmaeus morio): behavior and death of a wounded juvenile in danum valley, north borneo. | reports of wild great ape fatalities have been very limited, and only two have described wild orangutan deaths. we found a wounded juvenile female bornean orangutan on 7 october 2006 in the danum valley, sabah, malaysia, and observed the individual's behavior for 7 days until her death on 13 october 2006. the 5-6-year-old orangutan, which we had observed since 2004, was wounded in the left brachium, back, and right hand. the individual's behavior changed after injury; the mean nest-nest active t ... | 2012 | 22350273 |
| ape conservation physiology: fecal glucocorticoid responses in wild pongo pygmaeus morio following human visitation. | nature-based tourism can generate important revenue to support conservation of biodiversity. however, constant exposure to tourists and subsequent chronic activation of stress responses can produce pathological effects, including impaired cognition, growth, reproduction, and immunity in the same animals we are interested in protecting. utilizing fecal samples (n = 53) from 2 wild habituated orangutans (pongo pygmaeus morio) (in addition to 26 fecal samples from 4 wild unhabituated orangutans) in ... | 2012 | 22438916 |
| androgens and innate immunity in rehabilitated semi-captive orangutans (pongo pygmaeus morio) from malaysian borneo. | despite the implications for the development of life-history traits, endocrine-immune trade-offs in apes are not well studied. this is due, in part, to difficulty in sampling wild primates, and lack of methods available for immune measures using samples collected noninvasively. evidence for androgen-mediated immune trade-offs in orangutans is virtually absent, and very little is known regarding their pattern of adrenal development and production of adrenal androgens. to remedy both of these defi ... | 2015 | 25728599 |
| detection of urinary estrogen conjugates and creatinine using near infrared spectroscopy in bornean orangutans (pongo pygmaeus). | for promoting in situ conservation, it is important to estimate the density distribution of fertile individuals, and there is a need for developing an easy monitoring method to discriminate between physiological states. to date, physiological state has generally been determined by measuring hormone concentration using radioimmunoassay or enzyme immunoassay (eia) methods. however, these methods have rarely been applied in situ because of the requirements for a large amount of reagent, instruments ... | 2016 | 26561334 |
| fluctuations of population density in bornean orangutans (pongo pygmaeus morio) related to fruit availability in the danum valley, sabah, malaysia: a 10-year record including two mast fruitings and three other peak fruitings. | we investigated the population density of bornean orangutans (pongo pygmaeus morio) and fruit availability for 10 years (2005-2014), in primary lowland dipterocarp forests in the danum valley, sabah, malaysia. during the research period, two mast fruitings and three other peak fruiting events of different scales occurred in the study area. the orangutan population density, estimated every 2 months by the marked nest count method, changed between 0.3 and 4.4 ind/km(2) and the mean population dens ... | 2017 | 27848156 |
| patterns of genetic diversity and migration in increasingly fragmented and declining orang-utan (pongo pygmaeus) populations from sabah, malaysia. | we investigated the genetic structure within and among bornean orang-utans (pongo pygmaeus) in forest fragments of the lower kinabatangan flood plain in sabah, malaysia. dna was extracted from hair and faecal samples for 200 wild individuals collected during boat surveys on the kinabatangan river. fourteen microsatellite loci were used to characterize patterns of genetic diversity. we found that genetic diversity was high in the set of samples (mean h(e) = 0.74) and that genetic differentiation ... | 2005 | 15660936 |
| aerial surveys give new estimates for orangutans in sabah, malaysia. | great apes are threatened with extinction, but precise information about the distribution and size of most populations is currently lacking. we conducted orangutan nest counts in the malaysian state of sabah (north borneo), using a combination of ground and helicopter surveys, and provided a way to estimate the current distribution and size of the populations living throughout the entire state. we show that the number of nests detected during aerial surveys is directly related to the estimated t ... | 2004 | 15630475 |
| riverine effects on mitochondrial structure of bornean orangutans (pongo pygmaeus) at two spatial scales. | we examined mitochondrial dna control region sequences of 73 kinabatangan orangutans to test the hypothesis that the phylogeographical structure of the bornean orangutan is influenced by riverine barriers. the lower kinabatangan wildlife sanctuary contains one of the most northern populations of orangutans (pongo pygmaeus) on borneo and is bisected by the kinabatangan river, the longest river in sabah. orang-utan samples on either side of the river were strongly differentiated with a high phi(st ... | 2008 | 18494768 |