Yoyo River Forest Reserve

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Summary

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• Western chimpanzees (Pan troglodytes verus) may be present in Yoyo River Forest Reserve.
• No chimpanzees were recorded in the last survey.
• The chimpanzee population trend is decreasing.
• The site has a total size of 236 km².
• Key threats to chimpanzees are hunting and logging.
• Conservation activities are not documented.

Site characteristics

Yoyo River Forest Reserve is located in southwestern Ghana, north of the town Enchi. The reserve is contiguous with Tano-Anwia and Tano-Ehuro Forest Reserves. Yoyo is also connected to Boin River Forest Reserve by a narrow strip of forest (BirdLife International 2022). The reserve was created in 1932 (Gatti 2009). The area is drained by the Yoyo river and several other streams whose valleys become swampy during the wet season (BirdLife International 2022). The site has been an Important Bird Area since 2001 (BirdLife International 2022).

Table 1. Basic site information for Yoyo River Forest Reserve

Species	'Pan troglodytes verus
Area	236 km²
Coordinates	Lat: 5.960077 , Lon: -2.795357
Type of site	Protected area (Forest Reserve)
Habitat types	Subtropical/tropical moist lowland forest
Type of governance

IUCN habitat categories Site designations

Ape status

A rapid survey was conducted at the site in 2009 in the context of the Wildlife Wood Project in Ghana, which aims to assist logging companies in improving wildlife management in concession areas (Gatti 2009). No signs of chimpanzees were recorded.

Table 2. Ape population estimates reported for Yoyo River Forest Reserve

Species	Year	Occurrence	Encounter or vistation rate (nests/km; ind/day)	Density estimate [ind./ km²] (95% CI)	Abundance estimate (95% CI)	Survey area	Sampling method	Analytical framework	Source	Comments	A.P.E.S. database ID
Pan troglodytes verus	2009		0			Yoyo River Forest Reserve	Reconnaissance walk		Gatti 2009	survey effort: 22.63 km

Threats

Table 3. Threats to apes reported for Yoyo River Forest Reserve

Category	Specific threats	Threat level	Description	Year of threat
10 Geological events		Absent
12 Other threat		Absent
5 Biological resource use	5.1 Hunting & collecting terrestrial animals	High (more than 70% of population affected)	High hunting pressure (Gatti 2009).	Ongoing (2009)
1 Residential & commercial development		Unknown
2 Agriculture & aquaculture		Unknown
3 Energy production & mining		Unknown
4 Transportation & service corridors		Unknown
6 Human intrusions & disturbance		Unknown
7 Natural system modifications		Unknown
8 Invasive & other problematic species, genes & diseases		Unknown
9 Pollution		Unknown
11 Climate change & severe weather		Unknown
5 Biological resource use	5.3 Logging & wood harvesting	Unknown	The reserve was formerly under two timber concessions and the eastern and western parts were logged between 1962 and 1979 (BirdLife International 2022). Concessions within the reserve were acquired by SAX in 1993, and logging has taken place in selected compartments at least as early as 1999 (Gatti 2009).	1962-1979, 1999-Ongoing (2009)

IUCN Threats list

Challenges

Table 5. Challenges reported for Yoyo River Forest Reserve

Challenges	Specific challenges	Source	Year(s)
	Not reported

Enablers

Table 6. Enablers reported for Yoyo River Forest 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

Documented behaviours

Table 7. Behaviours documented for Yoyo River Forest Reserve

Behavior	Source
Not reported

References

BirdLife International (2022) Important Bird Areas factsheet: Yoyo River Forest Reserve. Downloaded from http://www.birdlife.org on 15/03/2022.

Gatti, S. (2009). Mammal surveys and capacity building for the Wildlife Wood Project - Ghana. Unpublished report to the WWP-Ghana.

Page created by: A.P.E.S. Wiki team Date: NA