Bagnomba

West Africa > Senegal > Bagnomba

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Summary

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• Western chimpanzees (Pan troglodytes verus) are present in Bagnomba.
• The population size is unknown.
• The chimpanzee population trend is unknown.
• The size of the site is unknown.
• Key threats to chimpanzees are logging and transformation of land for agriculture.
• Conservation activities have focused on research activities; the site is also an offset site of the Petowal mining company.

Site characteristics

The site is located in the savanna-woodlands of southeastern Senegal, 15 km away from the Fongoli research site (Badji et al. 2018).

Table 1. Basic site information for Bagnomba

Species	Pan troglodytes verus
Area
Coordinates	Lat: 12.713017 , Lon: -12.376238
Type of site	Non-protected area
Habitat types	Savanna, Subtropical/tropical dry forest
Type of governance

Types of sites Governance types Habitat types

Ape status

Chimpanzees are present in the area but the population size is currently unknown.

Table 2. Ape population estimates reported for Bagnomba

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					Bagnomba	Line transects, Camera trap		Diallo, D. pers. comm. 2023
Pan troglodytes verus	2014-2015	Present				Bagnomba	Reconnaissance walk		Ndiaye et al. 2017
Pan troglodytes verus	2015	Present				Bagnomba Hill, 5 km²	Reconnaissance walk		Badji et al. 2018	survey effort: 65 km. 550 nests recorded

Sampling methods Analytical frameworks

Threats

Direct threats at Bagnomba include deforestation around the base of the hill due to agriculture and livestock grazing. Gold mining is present within a 3 km radius from the hill (Badji et al. 2018).

Table 3. Threats to apes reported for Bagnomba

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)	Expansion of agricultural land in the area (Diallo, D. pers. comm. 2023).	Ongoing (2023)
5 Biological resource use	5.2 Gathering terrestrial plants	High (more than 70% of population affected)	Competition for Adansonia digitata, baobab, which chimpanzees also feed on (Diallo, D. pers. comm. 2023).	Ongoing (2023)
5 Biological resource use	5.3 Logging & wood harvesting	High (more than 70% of population affected)	Extraction of timber for construction (Diallo, D. pers. comm. 2023).	Ongoing (2023)

Threats

Challenges

Table 5. Challenges reported for Bagnomba

Challenges	Specific challenges	Source	Year(s)
	Not reported

Challenges

Enablers

Table 6. Enablers reported for Bagnomba

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

Research activities

A few studies have been conducted at the site, including the investigation of chimpanzee nesting behavior (Badji et al. 2018), and surveys that have included the area (Ndiaye et al. 2017, Diallo, D. pers. comm. 2023).

Documented behaviours

Table 7. Behaviours documented for Bagnomba

Category	Behavior	Observation type	Prevalence	Observation dates	Source	Habituation	Species	Comment
	Ground nest

Behaviours

References

Badji, L., Ndiaye, P. I., Lindshield, S. M., Ba, C. T., & Pruetz, J. D. (2018). Savanna chimpanzee (Pan troglodytes verus) nesting ecology at Bagnomba (Kedougou, Senegal). Primates, 59, 235-241.

Ndiaye, P. I., Lindshield, S. M., Badji, L., & Pruetz, J. D. (2017, January). Survey of Chimpanzees, Pan troglodytes verus (Schwarz, 1934), Outside the Protected Areas in Senegal (West Africa). In FOLIA PRIMATOLOGICA (Vol. 88, No. 2, pp. 113-114). ALLSCHWILERSTRASSE 10, CH-4009 BASEL, SWITZERLAND: KARGER.

Page created by: Dame Diallo Date: 2023-10-26