Brook S.M.,WWF Vietnam |
van Coeverden de Groot P.,Queen's University |
Scott C.,Queen's University |
Boag P.,Queen's University |
And 9 more authors.
Biological Conservation | Year: 2012
Javan rhinoceros (. Rhinoceros sondaicus) is among the most threatened large mammal species in the world. Development of rigorous, non-invasive survey techniques is a high priority, to monitor populations and develop informed conservation management strategies. The critically endangered javan rhinoceros until recently survived in two separate populations, one in Vietnam and one in Indonesia, representing distinct subspecies. The range of the . annamiticus subspecies around Cat Tien National Park (CTNP) has declined significantly since its re-discovery in 1989, and no accurate estimate of population size had ever been obtained. We employed integrated survey techniques and analyses to determine the population status of the javan rhinoceros in Vietnam. We conducted a comprehensive field survey of the Cat Loc sector of CTNP using scat detection dogs to detect javan rhinoceros dung between October 2009 and April 2010. Twenty-two dung samples were collected for microsatellite DNA analysis, seventeen of which were of sufficient quality to be analysed. The genotyping work confirmed that only a single rhinoceros was present at the start of the survey in 2009 and that this was the same individual that was found dead in April 2010. Although far less definitive than host genotyping, stool bacterial diversity assays also supported the hypothesis that all samples collected by the survey were from one individual. This empirical data combined with field survey data indicate the extinction of the javan rhinoceros in Vietnam. We conclude by discussing the developmental progress of these non-invasive survey techniques to monitor other endangered rhinoceros populations. © 2012 Elsevier Ltd.
Kenyon M.,Dao Tien Endangered Primate Species Center |
Streicher U.,Endangered Asian Species Trust |
Loung H.,Dao Tien Endangered Primate Species Center |
Tran T.,Cat Tien National Park |
And 4 more authors.
Endangered Species Research | Year: 2014
From 2009 to 2012 thirteen wild-born pygmy slow lorises Nycticebus pygmaeus (in this paper referred to as pygmy lorises), confiscated from illegal trade, were radio-collared and released into secondary forest in South Vietnam. Pygmy lorises were monitored until death, recapture, or loss of collar; the longest monitoring period was 73 d. The mean (±SD) distances between consecutive sleeping sites were recorded for 324 consecutive days and averaged 122 ± 108.0 m. Mean distances between sleeping sites for males and females were similar at 110.7 ± 92.6 m for males and 128.8 ± 116.7 m for females, with the greatest distance covered by a female (793 m). Mean height of the sleeping sites was 8.54 ± 4.46 m (n = 60), in trees with a mean diameter at breast height of 75.2 ± 58.4 cm (n = 225). Mean height of the trees where lorises slept was 20.2 ± 9.0 m (n = 230). The pygmy lorises slept mostly in the >8 m band, the area of highest tree connectivity. Of the pygmy lorises studied 38% (5/13) were found dead, 7% (1/13) were returned to captivity due to severe loss of condition and for 23% (3/13) the outcome is unknown due to early collar loss. Causes of death included hyperthermia and natural predation. The remaining 30% (4/13), 2 males and 2 females, were in good condition when last tracked before premature collar drop-off, up to 73 d after release. From this limited data set, a 'soft' release, wet season release and consideration of predator density at the release site are recommendations for increasing chances of survival. © Inter-Research 2014.
The role of sanctuaries in integrated conservation: The Endangered Asian Species Trust linking Monkey World - Ape Rescue, UK and Pingtung Rescue Centre, Taiwan, with the Dao Tien Endangered Primate Species Centre in Vietnam
Kenyon M.,Endangered Asian Species Trust |
Kenyon M.,Dao Tien Endangered Primate Species Center |
Cronin A.,Endangered Asian Species Trust |
Jai-Chyi Pei K.,National Pingtung University of Science and Technology |
Van Thanh T.,Cat Tien National Park
International Zoo Yearbook | Year: 2012
The Endangered Asian Species Trust, founded by Monkey World - Ape Rescue Centre, United Kingdom, organizes the rehabilitation and release of threatened South Vietnamese primates at the new Dao Tien Endangered Primate Species Centre in Cat Tien National Park Vietnam. This work supports the Vietnamese Government to enforce laws on stopping the trade in threatened primates, by providing a place for confiscated animals and facilitating the return to the wild of suitable candidates, boosting wild populations and working towards founding new populations in areas where they have become extinct, such as in regenerating lowland forests. © 2011 The Authors. International Zoo Yearbook © 2011 The Zoological Society of London.
Kenyon M.,University of Cambridge |
Roos C.,German Primate Center |
Binh V.T.,Cat Tien National Park |
Chivers D.,University of Cambridge
Folia Primatologica | Year: 2011
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 revealed the majority of adults sampled of both sexes to be related to adults in neighbouring territories. Overall, the indications are that in this empty habitat, gibbons appear to be able to establish territories adjacent to those of their kin. Copyright © 2011 S. Karger AG, Basel.
Le X.T.,Center for Nuclear Techniques |
Le Q.H.N.,Center for Nuclear Techniques |
Pham N.D.,Cat Tien National Park |
Duong V.H.,Hanoi University |
And 3 more authors.
Mycological Progress | Year: 2012
The polypore genus Tomophagus was created to segregate one peculiar species, Ganoderma colossum, from the genus Ganoderma. Recent molecular studies have established the validity of this monotypic genus. Here we report the discovery of a second species of Tomophagus, T. cattienensis sp. nov., from Cat Tien National Park in southern Vietnam, a lowland forest that has been designated as a Biosphere Reserve by the United Nations Educational, Scientific and Cultural Organization (UNESCO). Recognition of this new species is based on combined evidence from morphology, cultural characteristics, and ITS rDNA barcodes. The discovery of this new species may have implications for the discovery of novel bioactive compounds for pharmaceutical use and/or for the pulp industry. © 2011 German Mycological Society and Springer.