| possible shift in macaque trophic level following a century of biodiversity loss in singapore. | biodiversity loss in tropical forests is a major problem in conservation biology, and nowhere is this more dire than in southeast asia. deforestation and the associated loss of species may trigger shifts in habitat and feeding preferences of persisting species. in this study, i compared the habitat use and diet of long-tailed macaque (macaca fascicularis) populations in singapore from two time periods: museum specimens originally collected between 1893 and 1944, and living macaques sampled in 20 ... | 2011 | 21611718 |
| morphometrics and pelage characterization of longtailed macaques (macaca fascicularis) from pulau bintan, indonesia; singapore; and southern vietnam. | cynomolgus (or longtailed) macaques (macaca fascicularis) are used extensively as laboratory animals in biomedical research. their use in singapore, an emerging biomedical hub in southeast asia, is now increasing widely, with research subjects currently originating from singapore, vietnam, and pulau bintan, indonesia. limited data exist on the genetic and phenotypic polymorphisms and phylogenetic relationships of these groups, and the animals are used as research subjects without regard to poten ... | 2009 | 19930820 |
| considering human-primate transmission of measles virus through the prism of risk analysis. | measles is a respiratory virus that is endemic to humans. human-nonhuman primate (nhp) transmission of the measles virus has been shown to cause significant morbidity and mortality in nhp populations. we investigated serological evidence of exposure to measles virus in two free-ranging populations of macaques at the bukit timah (btnr) and central catchment nature (ccnr) reserves in singapore and the swoyambhu temple in katmandu, nepal. at btnr/ccnr none of the 38 macaques (macaca fascicularis) s ... | 2006 | 16900498 |
| intracytoplasmic injection of frozen-thawed epididymal spermatozoa in a nonhuman primate model, the cynomolgus monkey (macaca fascicularis). | intracytoplasmic sperm injection (icsi) with frozen-thawed epididymal spermatozoa was performed in the cynomolgus monkey (macacafascicularis) to produce embryos in vitro. eleven sexually mature females were hyperstimulated with an gnrh agonist (1.8 mg active triptorelin per 2 kg body weight), followed (2 weeks later) by rfsh (37.5 iu per 2 kg daily) for 12 days, and finally 1000 iu of hcg. epididymal spermatozoa were collected from a single adult male monkey. the first stimulation cycle resulted ... | 2002 | 12387351 |
| seed dispersal by long-tailed macaques. | we review here the methods by which long-tailed macaques (macaca fascicularis fascicularis) process seeds in bukit timah nature reserve, singapore, and the factors that influence this. feeding observations have revealed that these macaques either destroy seeds in their mouth with their teeth, spit them out whole from the mouth after removing much of the flesh, or else clean the flesh off them at the front of the mouth and then drop them. absence of these observed behaviors is associated with the ... | 1998 | 9573441 |
| macaque-human interactions and the societal perceptions of macaques in singapore. | humans and long-tailed macaques (macaca fascicularis) interface in several locations in singapore. we investigated six of these interface zones to assess the level of conflict between the two species. we observed macaque-to-human interactions and distributed questionnaires to residents and visitors of nature reserves. we observed an average of two macaque-to-human interactions per hour at the sites, which included affiliative or submissive behaviors (46.9%), aggression (19.1%), taking food and o ... | 2009 | 19479953 |
| characterizing human-macaque interactions in singapore. | previous studies have noted substantial human-macaque interactions involving physical contact in bali, indonesia; gibraltar; and mt. emei, china [fuentes, american journal of primatology 68:880-896, 2006; zhao, tibetan macaques, visitors, and local people at mt. emei: problems and countermeasures. in: paterson and wallis, editor. commensalism and conflict: the human-primate interface. norman, ok: american society of primatologists. p 376-399, 2005]. the aim of this study was to conduct prelimina ... | 2008 | 18521871 |
| molecular epidemiological investigation of plasmodium knowlesi in humans and macaques in singapore. | singapore reported its first locally acquired human plasmodium knowlesi infection in 2007, involving a soldier who had undergone training in a forested area where long-tailed macaques are frequently seen. comprehensive disease surveillance and monitoring system that was set up after the initial case detected four additional human p. knowlesi cases in 2007 and one in 2008. all involved military personnel who had undergone training in the forested area, and none had traveled out of singapore 1 mon ... | 2011 | 20586605 |
| lead levels in long-tailed macaque (macaca fascicularis) hair from singapore. | nonhuman primates are potentially good sentinels of environmental toxicants because they share a similar physiology and life history with humans. in this report we present the results of an analysis of lead concentrations in hair from long-tailed macaques in singapore. we hypothesized that because singapore is highly urbanized, its macaque population may be exposed to higher levels of lead. the results of our study indicated that singapore's macaque population has not been exposed to high levels ... | 2011 | 21327699 |
| diet, activity, habitat use, and ranging of two neighboring groups of food-enhanced long-tailed macaques (macaca fascicularis). | we conducted observations of two neighboring groups of food-enhanced long-tailed macaques (macaca fascicularis) over a period of one year. we examined their diet, behavior, habitat use, and ranging and how within-population variability reflected differential utilization of anthropogenic food resources. the group that consumed more anthropogenic food spent less time feeding on wild fruits and flowers, less time resting, and more time locomoting. they used forest habitats less often, and had a lar ... | 2013 | 23447101 |
| variation in hair δ(13)c and δ (15)n values in long-tailed macaques (macaca fascicularis) from singapore. | much of the primatology literature on stable isotope ratios of carbon (δ(13)c) and nitrogen (δ(15)n) has focused on african and new world species, with comparatively little research published on asian primates. here we present hair δ(13)c and δ(15)n isotope values for a sample of 33 long-tailed macaques from singapore. we evaluate the suggestion by a previous researcher that forest degradation and biodiversity loss in singapore have led to a decline in macaque trophic level. the results of our a ... | 2014 | 23729223 |
| urban primate ranging patterns: gps-collar deployments for macaca fascicularis and m. sylvanus. | the global increase in urbanization is leading to heavier interface between humans and wildlife. within these anthropogenic landscapes, little is known about ranging patterns, particularly with regard to urban primates. here we present the results of the first long-term deployment of multiple gps collars on two species of macaques to investigate the impacts of urbanization on urban primate ranging patterns in singapore and gibraltar. collars data acquisition were excellent with respect to the am ... | 2017 | 28419550 |