Yok Don National Park

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Summary

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• Yellow-cheeked gibbons (Nomascus gabriellae) may be present in Yok Don National Park.
• The population size is unknown.
• The population trend is unknown.
• The site has a total size of 1155 km².
• Key threats to gibbons hunting and illegal logging.
• Conservation activities are not documented.

Site characteristics

Yok Don National park was established in 1992. Yok Don is the second biggest national park and it is the only national park to conserve dry deciduous dipterocarp forests in Vietnam. Yok Don National Park is home to a high diversity of wildlife including 89 species of mammals, 305 species of birds, 16 species of amphibians, 48 species of reptiles and 858 species of plants, hundreds of species of freshwater fish and thousands of species of insects. Wild elephants, wild water buffalos and gaurs inhabit the site. The park is connected to a large part of protected forests in Cambodia (Yok Don National Park).

Table 1. Basic site information for Yok Don National Park

Species	Nomascus gabriellae
Area	1,155 km²
Coordinates	Lat: 12.836104 , Lon: 107.697616
Type of site	Protected area (National Park)
Habitat types	Subtropical/tropical moist lowland forest
Type of governance

Types of sites Governance types Habitat types

Ape status

Most of Yok Don National Park consists of dry deciduous dipterocarp forest which is not suitable habitat for gibbons. Yellow-cheeked gibbons are considered to be rare in the park; only two confirmed records are from this park, one in 2007 and another in 2002-2003 (Rawson et al. 2011).

Table 2. Ape population estimates reported for Yok Don National Park

Species	Year	Total number groups (95% CI)	Density ​​[groups/km²​] (95% CI)	Total number indiv. (95% CI)	Area	Method	Source	Comments	A.P.E.S. database ID
Nomascus gabriellae	2007				Yok Don National Park	Unknown	Rawson et al. 2011
Nomascus gabriellae	2002-2003				Yok Don National Park	Unknown	Rawson et al. 2011

Sampling methods Analytical frameworks

Threats

Table 3. Threats to apes reported for Yok Don National Park

Category	Specific threats	Threat level	Description	Year of threat
5 Biological resource use	5.1 Hunting & collecting terrestrial animals	Present (unknown severity)	Hunting with guns (Rawson et al. 2011).	Ongoing (2011)
5 Biological resource use	5.3 Logging & wood harvesting	Present (unknown severity)	Illegal logging (Rawson et al. 2011).	Ongoing (2011)

Threats

Conservation activities

Table 4. Conservation activities reported for Yok Don National Park

Category	Specific activity	Description	Implementing organization(s)	Year of activity
5 Protection & restoration	5.2 Legally protect ape habitat			1986-Ongoing (2026)

Conservation activities

Challenges

Table 5. Challenges reported for Yok Don National Park

Challenges	Specific challenges	Source	Year(s)
	Not reported

Challenges

Enablers

Table 6. Enablers reported for Yok Don National Park

Enablers	Specific enablers	Source	Year(s)
1 Site management
2 Resources and capacity
3 Engaged community
4 Institutional support
5 Ecological context
6 Safety and stability

Enablers

Documented behaviours

Table 7. Behaviours documented for Yok Don National Park

Category	Behavior	Observation type	Prevalence	Observation dates	Source	Habituation	Species	Comment
	Not reported

Behaviours

References

Rawson, B. M., Insua-Cao, P., Nguyen, M. H., Van, N. T., Hoang, M. D., Mahood, S., …, & Roos, C. (2011). The Conservation Status of Gibbons in Vietnam. Hanoi, Viet Nam: Fauna & Flora International (FFI) and Conservation International. link

Page created by: APES Atlas Team Date: 2023-05-19