scholarly journals The tonkin snub-nosed monkey Rhinopithecus avunculus population in the Quan Ba forest, north-east Vietnam: an identification of priority habitat for conservation

2019 ◽  
Vol 41 (3) ◽  
Author(s):  
Nguyen Xuan Dang ◽  
Nguyen Xuan Nghia ◽  
Pham Van The

The Tonkin Snub-nosed Monkey Rhinopithecus avunculus is among the World’s 25 most endangered primates. At present, the species is found only in few forest areas in Ha Giang and Tuyen Quang Provinces, north-east Vietnam with a total number not exceeding 250 individuals.  The forest block in Cao Ma Po, Ta Van and Tung Vai Communes of Quan Ba District, Ha Giang Province (the Cao - Ta - Tung forest) harbors the second largest population of Tonkin Snub-nosed Monkey. This population was estimated to be conisted of about 30–35 individuals in 2007.  However, it faces a number of serious threats (wildlife hunting, habitat degradation by widespread forest farming of Tsao-ko cardamom plant, etc.) that may lead the population to be extinct in near future. The population was reduced to 15–21 individuals in 2016 due to these threats. In 2017–2018, we conducted a study to identify a priority habitat area to establish the Quan Ba Tonkin Snub-nosed Monkey Conservation Area. The results of our study show that the distribution of  the Quan Ba Tonkin Snub-nosed Monkey  population is  confined to a small area (about 5,000 ha) belonging to the Theng Chu Phin, Dao Dan Chai, Ta Lay mountains, the Hill 754 and a forest patch along the Vietnam-China  border  from the Post 283  to Post 295. This area harbors the best forest of the Cao - Ta - Tung area. The forest covers 92.3% of the area, and only 7.7% of the area is a non-forest land. There are two types of forest: evergreen broad-leaved forest (50.0% of total area) and limestone evergreen broad-leaved forest (42.3%).  The evergreen broad-leaved forest has been degraded to medium and restoration status. Tsao-ko cardamom Amomum tsao-ko fields are widespread. The limestone evergreen broad-leaved forest of almost primary status remains in very steep slopes and limestone mountains. The Cao - Ta - Tung forest was designated as a watershed protection forest that allows farming of agricultural and medicinal plants inside the forest and the forest farming of Tsao-ko cardamom is widespread becoming the most serious threat to the long-term survival of the Tonkin Snub-nosed Monkey population. In order to ensure long-term survival of the Quan Ba Tonkin Snub-nosed Monkey population, the  area of the Theng Chu Pin, Dao Dai Chai, Ta Lay, Tung Lau mountains,  the Hill 754 and a forest patch along the Vietnam-China border from the Post 283 to Post 285 must be designated as a special-use forest, i.e. to establish a Quan Ba Tonkin Snub-nosed Monkey Conservation Area. 

2019 ◽  
Vol 41 (3) ◽  
Author(s):  
Nguyen Xuan Dang ◽  
Nguyen Xuan Nghia ◽  
Pham Van The

The Tonkin Snub-nosed Monkey Rhinopithecus avunculus is among the World’s 25 most endangered primates. At present, the species is found only in few forest areas in Ha Giang and Tuyen Quang Provinces, north-east Vietnam with a total number not exceeding 250 individuals.  The forest block in Cao Ma Po, Ta Van and Tung Vai Communes of Quan Ba District, Ha Giang Province (the Cao - Ta - Tung forest) harbors the second largest population of Tonkin Snub-nosed Monkey. This population was estimated to be conisted of about 30–35 individuals in 2007.  However, it faces a number of serious threats (wildlife hunting, habitat degradation by widespread forest farming of Tsao-ko cardamom plant, etc.) that may lead the population to be extinct in near future. The population was reduced to 15–21 individuals in 2016 due to these threats. In 2017–2018, we conducted a study to identify a priority habitat area to establish the Quan Ba Tonkin Snub-nosed Monkey Conservation Area. The results of our study show that the distribution of  the Quan Ba Tonkin Snub-nosed Monkey  population is  confined to a small area (about 5,000 ha) belonging to the Theng Chu Phin, Dao Dan Chai, Ta Lay mountains, the Hill 754 and a forest patch along the Vietnam-China  border  from the Post 283  to Post 295. This area harbors the best forest of the Cao - Ta - Tung area. The forest covers 92.3% of the area, and only 7.7% of the area is a non-forest land. There are two types of forest: evergreen broad-leaved forest (50.0% of total area) and limestone evergreen broad-leaved forest (42.3%).  The evergreen broad-leaved forest has been degraded to medium and restoration status. Tsao-ko cardamom Amomum tsao-ko fields are widespread. The limestone evergreen broad-leaved forest of almost primary status remains in very steep slopes and limestone mountains. The Cao - Ta - Tung forest was designated as a watershed protection forest that allows farming of agricultural and medicinal plants inside the forest and the forest farming of Tsao-ko cardamom is widespread becoming the most serious threat to the long-term survival of the Tonkin Snub-nosed Monkey population. In order to ensure long-term survival of the Quan Ba Tonkin Snub-nosed Monkey population, the  area of the Theng Chu Pin, Dao Dai Chai, Ta Lay, Tung Lau mountains,  the Hill 754 and a forest patch along the Vietnam-China border from the Post 283 to Post 285 must be designated as a special-use forest, i.e. to establish a Quan Ba Tonkin Snub-nosed Monkey Conservation Area. 


2019 ◽  
Vol 39 (17) ◽  
Author(s):  
邹顺 ZOU Shun ◽  
周国逸 ZHOU Guoyi ◽  
张倩媚 ZHANG Qianmei ◽  
孟泽 MENG Ze ◽  
褚国伟 CHU Guowei ◽  
...  

2009 ◽  
Vol 142 (10) ◽  
pp. 2155-2165 ◽  
Author(s):  
Yuichi Yamaura ◽  
Susumu Ikeno ◽  
Makoto Sano ◽  
Kimiko Okabe ◽  
Kenichi Ozaki

Oryx ◽  
2020 ◽  
Vol 54 (6) ◽  
pp. 803-813
Author(s):  
Bárbara Moraes ◽  
Orly Razgour ◽  
João Pedro Souza-Alves ◽  
Jean P. Boubli ◽  
Bruna Bezerra

AbstractBrazil has a high diversity of primates, but increasing anthropogenic pressures and climate change could influence forest cover in the country and cause future changes in the distribution of primate populations. Here we aim to assess the long-term suitability of habitats for the conservation of three threatened Brazilian primates (Alouatta belzebul, Sapajus flavius and Sapajus libidinosus) through (1) estimating their current and future distributions using species distribution models, (2) evaluating how much of the areas projected to be suitable is represented within protected areas and priority areas for biodiversity conservation, and (3) assessing the extent of remaining forest cover in areas predicted to be suitable for these species. We found that 88% of the suitable areas are outside protected areas and only 24% are located in areas with forest cover. Although not within protected areas, 27% of the climatically suitable areas are considered priority areas for conservation. Future projections, considering a severe climate change scenario, indicate that A. belzebul, S. flavius and S. libidinosus may lose up to 94, 98 and 54% of their suitable range, respectively. The establishment of primate populations and their long-term survival in these areas are at risk. Mitigation actions such as the implementation of new protected areas, forest restoration and reduction of greenhouse gas emissions will be essential for the conservation of Brazilian primates.


Author(s):  
Hassan Al-Razi ◽  
Sabit Hasan ◽  
Tanvir Ahmed ◽  
Sabir Bin Muzaffar

Tropical forests harbor complex communities that are linked together by biotic relationships. Asian forests in particular have lost many apex predators due to habitat loss. We studied a small forest patch in northeastern Bangladesh, Satchari National Park, to determine density and diversity of nocturnal mammals and evaluate their relationships. Transects were walked from February 2015 to July 2016 and density was estimated using distance sampling. Nine species of mammals (5 arboreal and 4 ground-dwelling) were encountered. Densities of the common palm civets, Paradoxurus hermaphrodites, Bengal slow loris, Nycticebus bengalensis, were the highest (19.48 and 15.03 individuals/km2). Density of small Indian civets, large Indian civets and Indian mongoose were lower (2.31-5.55 individuals/km2). Unexpectedly, a wide range of nocturnal mammals co-existed in this forest patch, in spite of fragmentation and severe disturbance. We did not find any significant association between any of the species studied, although this could be an artifact of low sample size. Conservation in Bangladesh remains a challenge due to high human population density. Thus, strict conservation measures are needed to permit the long-term survival of these species.


JMS SKIMS ◽  
2009 ◽  
Vol 12 (1) ◽  
pp. 18-20
Author(s):  
R K Kotokey ◽  
Swarup Kar ◽  
Arup Sharma ◽  
Libe Nyorak ◽  
S Rupshi ◽  
...  

Fallot's Tetralogy is one of the most common cyanotic congenital heart diseases. Most of the patients though die during adulthood (depending upon the severity of pulmonary stenosis) but long term survival has also been recorded in the literature. Though there are various complications of Tetralogy of Fallot; multiple brain abscesses as a sequele of Fallot's Tetralogy leading to neurological manifestations is not frequently encountered in this part of North East. A case of Fallot's Tetralogy presenting with severe neurological deficit due to multiple brain abscesses who was treated conservatively is presented. The patient responded to the conservative management. (.1MedSci 2009;12(1):18-20)


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