The Conservation Status of Gibbons in Vietnam - Gibbon Research ...

The Conservation Status of Gibbons in Vietnamto have been caught in the park. Construction of Highway No. 723 was completed in 2007 andbisects the park. This has removed several hundred hectares of forest, fragmented the remainingforest and increased access for hunters. There is currently a project in the park focusing on theconservation status of gibbons and black-shanked douc langur Pygathrix nigripes (Van Ngoc Thinhpers. comm.).8.3.6 Khanh Hoa State Forest Enterprise and Tram Huong ForestryCompanyLocation: Khanh Vinh District, Khanh Hoa ProvinceArea: c. 25,000 hectaresStatus criteria: 1a, 2c, 3c, 4b, 5fDate of most recent survey: No surveyDate of most recent confirmed record: 2009Minimum population: unknownStatusNomascus gabriellae was confirmed to occur in Khanh Vinh District of Khanh Hoa Province in 2009(Hoang Minh Duc pers. comm.). The forest block where gibbons were observed is about 25,000 hain size and is contiguous with Bi Dup-Nui Ba (Lam Dong Province) and Chu Yang Sin (Dak LakProvince) National Parks. The gibbon population size is unknown but may be of nationalsignificance. The site is managed by a SFE and utilized for timber logging.Threats and Conservation ActionsHunting and large-scale commercial logging are the principle threats to N. gabriellae in this site.As a state forest enterprise, the site is not subject to conservation regulations. Logging occurs inforest blocks where gibbons have been recorded. Illegal logging by local communities is alsocommon. Gibbon habitats have been fragmented by construction in 2007 of Highway No. 722through part of the site. Priority actions include the development of sustainable logging practicesand inclusion of biodiversity conservation in logging plans, a halt to illegal logging and hunting,and status surveys to clarify the population size and locations of N. gabriellae.8.3.7 Hon Ba Nature ReserveLocation: Cam Lam and Khanh Son Districts, Khanh Hoa ProvinceArea: 20,978 hectaresStatus criteria: 1a, 2c, 3c, 4b, 5fDate of most recent survey: 2005Date of most recent confirmed record: 2005Minimum population: unknownStatusThe occurrence of N. gabriellae in this reserve was confirmed in 2005, when gibbons were heardcalling (Craik 2005). The investment plan for this site also reports the presence of gibbons (Hon BaNature Reserve 2005). No gibbons were observed during a biodiversity survey in 2003 (Tordoff etal. 2004). The reserve was officially established in 2005, but no other surveys or managementactions have been implemented.87