Nui Ong Nature Reserve

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Summary

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• Yellow-cheeked gibbons (Nomascus gabriellae) are present in Nui Ong Nature Reserve.
• A minimum of three groups were estimated to inhabit the site in 2010.
• The population trend is unknown.
• The site has a total size of 255 km².
• Key threats to gibbons are hunting, illegal logging, fires and exploitation of non-timber forest products.
• Conservation activities include community-based patrolling and an awareness campaign.

Site characteristics

The nature reserve is located in Binh Thuan Province, Vietnam. The site supports the southernmost populations of N. gabriellae in Vietnam (Rawson et al. 2011).

Table 1. Basic site information for Nui Ong Nature Reserve

Species	Nomascus gabriellae
Area	255 km²
Coordinates	Lat: 11.059721 , Lon: 107.765615
Type of site	Protected area (Nature Reserve)
Habitat types	Subtropical/tropical moist lowland forest
Type of governance

Types of sites Governance types Habitat types

Ape status

In 2009 and 2010, at least three groups of N. gabriellae were recorded (Hoang Minh Duc 2010 as cited by Rawson et al. 2011). The total N. gabriellae population is unknown- a survey is needed to update their status in the reserve.

Table 2. Ape population estimates reported for Nui Ong Nature Reserve

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	2009-2010		3		Nui Ong Nature Reserve (255 km²)	Unknown	Rawson et al. 2011	Minimum of three groups.

Sampling methods Analytical frameworks

Threats

The main threats to gibbons in the reserve are hunting, agricultural encroachment, illegal logging, exploitation of non-timber forest products and forest fires. The site is surrounded by six communes with over 40,000 people. Wildlife meat, including from primates, is sold at restaurants nearby (Rawson et al. 2011).

Table 3. Threats to apes reported for Nui Ong Nature Reserve

Category	Specific threats	Threat level	Description	Year of threat
2 Agriculture & aquaculture	2.1 Annual & perennial non-timber crops	High (more than 70% of population affected)	Agricultural encroachment (Rawson et al. 2011).	Ongoing (2011)
5 Biological resource use	5.1 Hunting & collecting terrestrial animals	High (more than 70% of population affected)	Illegal hunting with guns (Rawson et al. 2011).	Ongoing (2011)
5 Biological resource use	5.2 Gathering terrestrial plants	High (more than 70% of population affected)	Exploitation of non-timber forest products (Rawson et al. 2011).	Ongoing (2011)
5 Biological resource use	5.3 Logging & wood harvesting	High (more than 70% of population affected)	Illegal logging (Rawson et al. 2011).	Ongoing (2011)
7 Natural system modifications	7.1 Fire & fire suppression	High (more than 70% of population affected)	Forest fires (Rawson et al. 2011).	Ongoing (2011)

Threats

Conservation activities

A small project to strengthen management capacity and a community awareness campaign was conducted in the reserve in 2008. Since 2008, nine community-based patrol teams have operated to prevent forest fire, encroachment, illegal logging and hunting (Rawson et al. 2011).

Table 4. Conservation activities reported for Nui Ong Nature Reserve

Category	Specific activity	Description	Implementing organization(s)	Year of activity
2 Counter-wildlife crime	2.12 Implement community control of patrolling, banning hunting and removing snares	Community-based patrol teams have operated to prevent forest fire, encroachment, illegal logging and hunting (Rawson et al. 2011).		Ongoing (2011)
4 Education & awareness	4.1 Educate local communities about apes and sustainable use	Community awareness campaign (Rawson et al. 2011).		2008
5 Protection & restoration	5.2 Legally protect ape habitat			Ongoing (2023)

Conservation activities

Challenges

Table 5. Challenges reported for Nui Ong Nature Reserve

Challenges	Specific challenges	Source	Year(s)
	Not reported

Challenges

Enablers

Table 6. Enablers reported for Nui Ong Nature Reserve

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 Nui Ong Nature Reserve

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

Behaviours

References

Rawson, B. M, Insua-Cao, P., Nguyen Manh Ha, Van Ngoc Thinh, Hoang Minh Duc, Mahood, S., Geissmann, T. and Roos, C. (2011). The Conservation Status of Gibbons in Vietnam. Fauna & Flora International/Conservation International, Hanoi, Vietnam.

Page created by: APES Atlas Team Date: 2023-04-03