Mabi-Yaya Nature Reserve

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Summary

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Leaflet

• Western chimpanzees (Pan troglodytes verus) are present in Mabi-Yaya Nature Reserve.
• Population size is unknown.
• The trend or dynamics of the chimpanzee population is unknown.
• This site has a total surface area of 612.82 km².
• The main threats to chimpanzees are poaching and deforestation.
• OIPR monitors the site and the NGO NITIDAE conducts conservation awareness raising activities.

Site characteristics

Table 1. Basic site information for Mabi-Yaya Nature Reserve

Species	'Pan troglodytes verus
Area	612.82 km²
Coordinates	Lat: 5.670010 , Lon: -3.542367
Type of site	Protected area (Nature Reserve)
Habitat types	Subtropical/tropical moist lowland forest, Agricultural land
Type of governance

IUCN habitat categories Site designations

Ape status

The 2021 national forest wildlife inventory documented 2 chimpanzee vocalizations in the reserve. Observation of chimpanzees on 29/06/2023 by camera trap set by OIPR and the NGO NITIDAE. A total of 4 individuals (an adult female, a juvenile, an adolescent male and an adult male) were observed (Soiret pers. comm. 2023).

Table 2. Ape population estimates reported for Mabi-Yaya Nature 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	2020		0.005			Entire reserve, 612.82 km2	Reconnaissance walk		OIPR 2020	Patrouille ordinaire des agents forestiers de l'OIPR

Threats

The small chimpanzee population is threatened by deforestation due to the clearing and cultivation that took place when the reserve was created. There is also poaching and the risk of zoonosis due to contact between wildlife and humans (OIPR 2021). In September 2023, 20 people were detained by OIPR agents for hunting illegally in the reserve.

Table 3. Threats to apes reported for Mabi-Yaya Nature Reserve

Category	Specific threats	Threat level	Description	Year of threat
10 Geological events		Absent
12 Other threat		Absent
2 Agriculture & aquaculture	2.1 Annual & perennial non-timber crops	Medium (30-70% of population affected)	These plantations existed in the former classified forests. Most of them are cocoa plantations (NITIDAE and OIPR pers. comm. 2023).	Ongoing (2023)
5 Biological resource use	5.1 Hunting & collecting terrestrial animals	Medium (30-70% of population affected)	Poaching with 12-gauge shotguns, snare traps (NITIDAE and OIPR pers. comm. 2023).	Ongoing (2023)
1 Residential & commercial development		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

IUCN Threats list

Conservation activities

OIPR is responsible for monitoring the site. The site's ecological monitoring protocols and the monitoring operation plan have been drafted and will be validated before the end of 2022. The NGO NITIDAE, with funding from the World Bank, will be responsible for raising awareness. The site management plan is currently being drafted (Soiret pers. obs. 2023).

Table 4. Conservation activities reported for Mabi-Yaya Nature Reserve

Category	Specific activity	Description	Implementing organization(s)	Year of activity
2 Counter-wildlife crime	2.6 Regularly de-activate/remove ground snares	Regular patrols by OIPR officers collect shell casings and destroy poachers' traps, shelters and camps (Soiret pers. obs. 2023).		Ongoing (2023)
4 Education & awareness	4.1 Educate local communities about apes and sustainable use	OIPR and the NGO NITIDAE are responsible for raising awareness of biological conservation in the villages along the river (NITIDAE and OIPR pers. comm. 2023).		Ongoing (2023)
5 Protection & restoration	5.2 Legally protect ape habitat	The site is a nature reserve.		Ongoing (2023)

Conservation activities list (Junker et al. 2017)

Challenges

Table 5. Challenges reported for Mabi-Yaya Nature Reserve

Challenges	Specific challenges	Source	Year(s)
2 Resources and capacity	2.1 Lack of capacity/training	OIPR 2021

Enablers

Table 6. Enablers reported for Mabi-Yaya 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

Documented behaviours

Table 7. Behaviours documented for Mabi-Yaya Nature Reserve

Behavior	Source
Not reported

References

OIPR. 2021. Guide méthodologique de suivi-écologique de la Réserve naturelle de Mabi Yaya

Page created by: Serge Soiret & Colonel Azani Dede Date: NA