Difference between revisions of "Banyang-Mbo Wildlife Sanctuary"

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= Summary = <!-- An overview of the site, with one sentence for each section. May include a site map -->
 
= Summary = <!-- An overview of the site, with one sentence for each section. May include a site map -->
 +
<div style="float: right">
 +
{{#display_map: height=200px | width=300px | scrollzoom=off | zoom=5 | layers= OpenStreetMap, OpenTopoMap
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|5.357767, 9.609717~[[Banyang-Mbo Wildlife Sanctuary]]~Nigeria-Cameroon Chimpanzee
 +
}}
 +
</div>
 
* Nigeria-Cameroon chimpanzees (''Pan troglodytes ellioti'') are present in Banyang-Mbo Wildlife Sanctuary.
 
* Nigeria-Cameroon chimpanzees (''Pan troglodytes ellioti'') are present in Banyang-Mbo Wildlife Sanctuary.
 
* The population size is unknown.
 
* The population size is unknown.
−
* The population trend is unknown.
+
* The population trend is decreasing.
 
* The site has a total size of 640 km².
 
* The site has a total size of 640 km².
 
* Key threats to chimpanzees are hunting, logging, and agricultural encroachment .
 
* Key threats to chimpanzees are hunting, logging, and agricultural encroachment .
Line 27: Line 32:
 
|-
 
|-
 
|Coordinates
 
|Coordinates
−
|5.357767 N, 9.609717 E
+
|5.357767, 9.609717
 
|-
 
|-
 
|Designation
 
|Designation
Line 38: Line 43:
  
 
= Ape status = <!--An overview of ape population status (population sizes, trends, etc.), followed by a table of specific surveys and results -->
 
= Ape status = <!--An overview of ape population status (population sizes, trends, etc.), followed by a table of specific surveys and results -->
 +
 +
There was a notable decrease in the relative populations of chimpanzees in the site between 2007 and 2014; concurrently, there was a significant rise in hunting trail density within the BMWS during that period (Kupsch & Bobo 2024).
  
 
'''Table 2. Ape population estimates in Banyang-Mbo Wildlife Sanctuary'''
 
'''Table 2. Ape population estimates in Banyang-Mbo Wildlife Sanctuary'''
Line 53: Line 60:
 
|-
 
|-
 
|''Pan troglodytes ellioti''
 
|''Pan troglodytes ellioti''
 +
|2007
 +
|500-1000
 
|
 
|
 +
|1.793
 +
|Banyang-Mbo Wildlife Sanctuary
 +
|Line transects (Distance)
 +
|Greengrass & Maisels 2007 as cited by Morgan et al. 2011 and Kupsch & Bobo 2024
 +
|Survey effort: 30.5 km (n = 17 transects)
 
|
 
|
 +
|-
 +
|''Pan troglodytes ellioti''
 +
|2013-2014
 
|
 
|
 
|
 
|
−
|
+
|0.129
−
|
+
|Banyang-Mbo Wildlife Sanctuary
−
|
+
|Line transects (Distance)
−
|
+
|Kupsch & Bobo 2024
 +
|Survey effort: 124.5 km (n = 83 transects)
 
|
 
|
 
|}
 
|}
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= Threats =    <!-- a text overview of threats, followed by a table of key threats -->
 
= Threats =    <!-- a text overview of threats, followed by a table of key threats -->
  
−
The site is mainly threatened by logging, hunting and agricultural encroachment—there are a number of villages found legally within the sanctuary boundaries (BirdLife International 2020).
+
The site is mainly threatened by logging, hunting and agricultural encroachment, and there are a number of villages found legally within the sanctuary boundaries (BirdLife International 2020). A study (Kupsch & Bobo 2024) found that the threatening situation for wildlife in the site, especially for elephants and primates, points to high poaching pressure between 2007 and 2014. The abundances of these species as well as of duikers are now almost similar to the low levels in [[Korup National Park]]. This is supported by the notable increase in encounter rates of hunting trails in BMWS, similar to the high rates observed in [[Korup National Park]].
  
 
'''Table 3. Threats to apes in Banyang-Mbo Wildlife Sanctuary'''
 
'''Table 3. Threats to apes in Banyang-Mbo Wildlife Sanctuary'''
Line 79: Line 97:
 
|1. Residential & commercial development
 
|1. Residential & commercial development
 
|1.1 Housing & urban areas
 
|1.1 Housing & urban areas
−
|Present, but threat severity is unknown
+
|Present (unknown severity)
 
|
 
|
 
|A number of villages are found within the boundaries of the site, lawfully (BirdLife International 2020).
 
|A number of villages are found within the boundaries of the site, lawfully (BirdLife International 2020).
−
|Ongoing (2020)
+
|2001-Ongoing
 
|-
 
|-
 
|2. Agriculture & aquaculture
 
|2. Agriculture & aquaculture
 +
|2.1 Annual & perennial non-timber crops
 +
|Present (unknown severity)
 
|
 
|
−
|Unknown
+
|Agricultural encroachment is a threat in the site (BirdLife International 2020).
−
|
+
|2001-Ongoing
−
|
 
−
|
 
 
|-
 
|-
 
|3. Energy production & mining
 
|3. Energy production & mining
Line 108: Line 126:
 
|5.1 Hunting & collecting terrestrial animals
 
|5.1 Hunting & collecting terrestrial animals
 
|High
 
|High
 +
|1.962 hunting trail/km in 2007 (Greengrass & Maisels 2007).
 +
|Commercial poaching (Morgan et al. 2011; BirdLife International 2020).
 +
|2001-Ongoing
 +
|-
 +
|
 +
|5.1 Hunting & collecting terrestrial animals
 +
|High
 +
|2.867 hunting trail/km in 2014 (Kupsch & Bobo 2024).
 +
|Commercial poaching (Morgan et al. 2011; BirdLife International 2020); hunting trails increased between 2007 and 2014 (Kupsch & Bobo 2024).
 +
|2001-Ongoing
 +
|-
 
|
 
|
−
|Commercial poaching (Morgan et al. 2011; BirdLife International 2020).
+
|5.3 Logging & wood harvesting
−
|Ongoing (2020)
+
|Present (unknown severity)
 +
|
 +
|Logging is a threat in the area (BirdLife International 2020).
 +
|2001-Ongoing
 
|-
 
|-
 
|6. Human intrusion & disturbance
 
|6. Human intrusion & disturbance
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|-
 
|-
 
|11. Habitat Protection
 
|11. Habitat Protection
−
|Not reported
+
|11.2. Legally protect primate habitat
−
|
+
|The Wildlife Sanctuary was created in 1996 ([https://cameroon.panda.org/places_landscapes/coastal_forests_programme/banyang_mbo_wildlife_sanctuary/]).
−
|
+
|1996-Ongoing
 
|-
 
|-
 
|12. Species Management
 
|12. Species Management
Line 254: Line 286:
  
 
= Research activities = <!-- Overview of research activities -->
 
= Research activities = <!-- Overview of research activities -->
−
 
−
Greengrass, E.J. and Maisels, F. 2007. Conservation of the NigerianCameroon Chimpanzee P. t. vellerosus (and other mammals) In and Around the Banyang-Mbo Wildlife Sanctuary, South-west Province, Cameroon. Report, WCS Cameroon Programme, Wildlife Conservation Society, New York.
 
  
 
===Documented behaviours===  <!-- List of any behaviours observed at the site, including citations -->
 
===Documented behaviours===  <!-- List of any behaviours observed at the site, including citations -->
Line 268: Line 298:
 
|-
 
|-
 
|}
 
|}
 +
 +
= Exposure to climate change impacts =
 +
 +
As part of a study on the exposure of African great ape sites to climate change impacts, Kiribou et al. (2024) extracted climate data and data on projected extreme climate impact events for the site. Climatological characteristics were derived from observation-based climate data provided by the Inter-Sectoral Impact Model Intercomparison Project (ISIMIP, www.isimip.org). Parameters were calculated as the average across each 30-year period. For 1981-2010, the EWEMBI dataset from ISIMIP2a was used. For the two future periods (2021-2050 and 2071-2099) ISIMIP2b climate data based on four CMIP5 global climate models were used. For future projections, two Representative Concentration Pathways (RCP) were used. RCP 2.6 is a scenario with strong mitigation measures in which global temperatures would likely rise below 2°C. RCP 6.0 is a scenario with medium emissions in which global temperatures would likely rise up to 3°C by 2100. For the number of days with heavy precipitation events, the 98th percentile of all precipitation days (>1mm/d) was calculated for the 1979-2013 reference period as a threshold for a heavy precipitation event. Then, for each year, the number of days above that threshold was derived. The figures on temperature and precipitation anomaly show the deviation from the mean temperature and mean precipitation for the 1979-2013 reference period.
 +
The estimated exposure to future extreme climate impact events (crop failure, drought, river flood, wildfire, tropical cyclone, and heatwave) is based on a published dataset by Lange et al. 2020 derived from ISIMIP2b data. The same global climate models and RCPs as described above were used. Within each 30-year period, the number of years with an extreme event and the average proportion of the site affected were calculated (Kiribou et al. 2024).
 +
 +
'''Table 7. Estimated past and projected climatological characteristics in Banyang-Mbo Wildlife Sanctuary'''
 +
{| border='1' cellpadding='5' cellspacing='0' class='EE-table'
 +
|
 +
|'''1981-2010'''
 +
|'''2021-2050, RCP 2.6'''
 +
|'''2021-2050, RCP 6.0'''
 +
|'''2071-2099, RCP 2.6'''
 +
|'''2071-2099, RCP 6.0'''
 +
|-
 +
|Mean temperature [°C]
 +
|23.7
 +
|24.8
 +
|24.7
 +
|24.9
 +
|26
 +
|-
 +
|Annual precipitation [mm]
 +
|2316
 +
|2399
 +
|2414
 +
|2475
 +
|2472
 +
|-
 +
|Max no. consecutive dry days (per year)
 +
|40.7
 +
|31.7
 +
|35.9
 +
|34.5
 +
|38.8
 +
|-
 +
|No. days with heavy precipitation (per year)
 +
|6.1
 +
|6.5
 +
|6.1
 +
|7
 +
|7.2
 +
|-
 +
|}
 +
 +
 +
'''Table 8. Projected exposure of apes to extreme climate impact events in Banyang-Mbo Wildlife Sanctuary'''
 +
{| border='1' cellpadding='5' cellspacing='0' class='EE-table'
 +
|
 +
|'''No. of years with event (2021-2050, RCP 2.6)'''
 +
|'''% of site exposed (2021-2050, RCP 2.6)'''
 +
|'''No. of years with event (2021-2050, RCP 6.0)'''
 +
|'''% of site exposed (2021-2050, RCP 6.0)'''
 +
|'''No. of years with event (2070-2099, RCP 2.6)'''
 +
|'''% of site exposed (2070-2099, RCP 2.6)'''
 +
|'''No. of years with event (2070-2099, RCP 6.0)'''
 +
|'''% of site exposed (2070-2099, RCP 6.0)'''
 +
|-
 +
|Crop failure
 +
|3.5
 +
|0.41
 +
|3.5
 +
|0.57
 +
|2.5
 +
|0.12
 +
|4.5
 +
|0.14
 +
|-
 +
|Drought
 +
|0
 +
|0
 +
|0
 +
|0
 +
|0
 +
|0
 +
|0
 +
|0
 +
|-
 +
|Heatwave
 +
|2
 +
|100
 +
|1.5
 +
|100
 +
|2
 +
|100
 +
|3
 +
|100
 +
|-
 +
|River flood
 +
|2.5
 +
|1.23
 +
|1.75
 +
|0.2
 +
|2
 +
|0.81
 +
|5.25
 +
|1.72
 +
|-
 +
|Tropical cyclone
 +
|0
 +
|0
 +
|0
 +
|0
 +
|0
 +
|0
 +
|0
 +
|0
 +
|-
 +
|Wildfire
 +
|30
 +
|0.67
 +
|30
 +
|0.68
 +
|29
 +
|0.66
 +
|29
 +
|0.69
 +
|-
 +
|}
 +
 +
<div><ul>
 +
<li style="display: inline-block; vertical-align: top;"> [[File: PrecipAnomaly_Banyang-Mbo WS.png | 450px | thumb| right | Precipitation anomaly in Banyang-Mbo Wildlife Sanctuary]] </li>
 +
<li style="display: inline-block; vertical-align: top;"> [[File: TempAnomaly_Banyang-Mbo WS.png | 450px | thumb| right | Temperature anomaly in Banyang-Mbo Wildlife Sanctuary]] </li>
 +
</ul></div>
  
 
=External links=
 
=External links=
 
[https://cameroon.panda.org/places_landscapes/coastal_forests_programme/banyang_mbo_wildlife_sanctuary/ WWF Banyang-Mbo Wildlife Sanctuary]
 
[https://cameroon.panda.org/places_landscapes/coastal_forests_programme/banyang_mbo_wildlife_sanctuary/ WWF Banyang-Mbo Wildlife Sanctuary]
−
 
−
===Relevant datasets===
 
−
[http://apesportal.eva.mpg.de/database/archiveMap A.P.E.S Portal]
 
  
 
= References =
 
= References =
 
BirdLife International (2020) Important Bird Areas factsheet: Banyang Mbo Wildlife Sanctuary. Downloaded from http://www.birdlife.org on 30/12/2020. <br>
 
BirdLife International (2020) Important Bird Areas factsheet: Banyang Mbo Wildlife Sanctuary. Downloaded from http://www.birdlife.org on 30/12/2020. <br>
−
Morgan, B.J. et al. 2011. Regional Action Plan for the Conservation of the Nigeria-Cameroon Chimpanzee (Pan troglodytes ellioti). IUCN/SSC Primate Specialist Group and Zoological Society of San Diego, CA, USA <br>
+
Greengrass, E. J., & Maisels, F. (2007). Conservation of the Nigerian-Cameroon Chimpanzee P. t. vellerosus, (and other mammals) in and around Banyang-Mbo Wildlife Sanctuary, Southwest province, Cameroon. Report, WCS Cameroon Programme, Wildlife Conservation Society, New York.<br>
 +
Kiribou, R., Tehoda, P., Chukwu, O., Bempah, G., Kühl, H. S., Ferreira, J., ... & Heinicke, S. (2024). Exposure of African ape sites to climate change impacts. PLOS Climate, 3(2), e0000345.<br>
 +
Kupsch, D., & Bobo, K. S. (2024). Distribution parameters of large mammals and conservation management in an Afrotropical forest landscape and biodiversity hotspot. African Journal of Ecology, 62(2), e13254.br>
 +
Morgan, B. J., Adeleke, A., Bassey, T., Bergl, R., Dunn, A., Fotso, R., ... & Williamson, E. A. (2011). Regional action plan for the conservation of the Nigeria–Cameroon chimpanzee (Pan troglodytes ellioti). IUCN/SSC Primate Specialist Group and Zoological Society of San Diego. <br>
  
 
<br>
 
<br>
 
'''Page completed by: '''A.P.E.S. Wiki team''' Date:''' 08/01/2021 <!-- If you don't want to add your name, you can add "A.P.E.S. Wiki team" -->
 
'''Page completed by: '''A.P.E.S. Wiki team''' Date:''' 08/01/2021 <!-- If you don't want to add your name, you can add "A.P.E.S. Wiki team" -->

Revision as of 06:14, 14 March 2024

Central Africa > Cameroon > Banyang-Mbo Wildlife Sanctuary

Summary

Loading map...
  • Nigeria-Cameroon chimpanzees (Pan troglodytes ellioti) are present in Banyang-Mbo Wildlife Sanctuary.
  • The population size is unknown.
  • The population trend is decreasing.
  • The site has a total size of 640 km².
  • Key threats to chimpanzees are hunting, logging, and agricultural encroachment .
  • Conservation activities are not documented.

Site characteristics

Established in 1996, Banyang-Mbo Wildlife Sanctuary (BMWS) is situated between Korup National Park to the west and Santchou Wildlife Reserve to the east. With 322 bird species recorded, the site is an Important Bird Area (BirdLife International 2020). Nigeria-Cameroon chimpanzees, mandrills, and forest elephants are present in BMWS. The population of forest elephants has been significantly reduced by poaching. BMWS falls naturally into two sections: the northern block where the terrain is mostly flat, and a mountainous southern block, which includes a small part of the Bakossi mountains (BirdLife International 2020).

Table 1. Basic site information for Banyang-Mbo Wildlife Sanctuary

Area 640 km²
Coordinates 5.357767, 9.609717
Designation Wildlife Sanctuary
Habitat types Subtropical/tropical moist lowland forest, subtropical/tropical moist montane forest, subtropical/tropical heavily degraded former forest

IUCN habitat categories Site designations

Ape status

There was a notable decrease in the relative populations of chimpanzees in the site between 2007 and 2014; concurrently, there was a significant rise in hunting trail density within the BMWS during that period (Kupsch & Bobo 2024).

Table 2. Ape population estimates in Banyang-Mbo Wildlife Sanctuary

Species Year Abundance estimate (95% CI) Density estimate [ind./ km²] (95% CI) Encounter rate (nests/km) Area Method Source Comments A.P.E.S. database ID
Pan troglodytes ellioti 2007 500-1000 1.793 Banyang-Mbo Wildlife Sanctuary Line transects (Distance) Greengrass & Maisels 2007 as cited by Morgan et al. 2011 and Kupsch & Bobo 2024 Survey effort: 30.5 km (n = 17 transects)
Pan troglodytes ellioti 2013-2014 0.129 Banyang-Mbo Wildlife Sanctuary Line transects (Distance) Kupsch & Bobo 2024 Survey effort: 124.5 km (n = 83 transects)

Threats

The site is mainly threatened by logging, hunting and agricultural encroachment, and there are a number of villages found legally within the sanctuary boundaries (BirdLife International 2020). A study (Kupsch & Bobo 2024) found that the threatening situation for wildlife in the site, especially for elephants and primates, points to high poaching pressure between 2007 and 2014. The abundances of these species as well as of duikers are now almost similar to the low levels in Korup National Park. This is supported by the notable increase in encounter rates of hunting trails in BMWS, similar to the high rates observed in Korup National Park.

Table 3. Threats to apes in Banyang-Mbo Wildlife Sanctuary

Category Specific threats Threat level Quantified severity Description Year of threat
1. Residential & commercial development 1.1 Housing & urban areas Present (unknown severity) A number of villages are found within the boundaries of the site, lawfully (BirdLife International 2020). 2001-Ongoing
2. Agriculture & aquaculture 2.1 Annual & perennial non-timber crops Present (unknown severity) Agricultural encroachment is a threat in the site (BirdLife International 2020). 2001-Ongoing
3. Energy production & mining Unknown
4. Transportation & service corridors Unknown
5. Biological resource use 5.1 Hunting & collecting terrestrial animals High 1.962 hunting trail/km in 2007 (Greengrass & Maisels 2007). Commercial poaching (Morgan et al. 2011; BirdLife International 2020). 2001-Ongoing
5.1 Hunting & collecting terrestrial animals High 2.867 hunting trail/km in 2014 (Kupsch & Bobo 2024). Commercial poaching (Morgan et al. 2011; BirdLife International 2020); hunting trails increased between 2007 and 2014 (Kupsch & Bobo 2024). 2001-Ongoing
5.3 Logging & wood harvesting Present (unknown severity) Logging is a threat in the area (BirdLife International 2020). 2001-Ongoing
6. Human intrusion & disturbance Unknown
7. Natural system modifications Unknown
8. Invasive & other problematic species, genes, diseases Unknown
9. Pollution Unknown
10. Geological Events Absent
11. Climate change & severe weather Unknown
12. Other options Absent

IUCN Threats list

Conservation activities

Table 4. Conservation activities in Banyang-Mbo Wildlife Sanctuary

Category Specific activity Description Year of activity
1. Residential & commercial development Not reported
2. Agriculture & aquaculture Not reported
3. Energy production & mining Not reported
4. Transportation & service corridors Not reported
5. Biological resource use Not reported
6. Human intrusion & disturbance Not reported
7. Natural system modifications Not reported
8. Invasive & other problematic species, genes, diseases Not reported
9. Pollution Not reported
10. Education & Awareness Not reported
11. Habitat Protection 11.2. Legally protect primate habitat The Wildlife Sanctuary was created in 1996 ([1]). 1996-Ongoing
12. Species Management Not reported
13. Livelihood; Economic & Other Incentives Not reported

Conservation activities list (Junker et al. 2017)

Challenges

Table 5. Challenges reported for Banyang-Mbo Wildlife Sanctuary

Challenge Source
Not reported

Research activities

Documented behaviours

Table 6. Ape behaviors reported for Banyang-Mbo Wildlife Sanctuary

Behavior Source
Not reported

Exposure to climate change impacts

As part of a study on the exposure of African great ape sites to climate change impacts, Kiribou et al. (2024) extracted climate data and data on projected extreme climate impact events for the site. Climatological characteristics were derived from observation-based climate data provided by the Inter-Sectoral Impact Model Intercomparison Project (ISIMIP, www.isimip.org). Parameters were calculated as the average across each 30-year period. For 1981-2010, the EWEMBI dataset from ISIMIP2a was used. For the two future periods (2021-2050 and 2071-2099) ISIMIP2b climate data based on four CMIP5 global climate models were used. For future projections, two Representative Concentration Pathways (RCP) were used. RCP 2.6 is a scenario with strong mitigation measures in which global temperatures would likely rise below 2°C. RCP 6.0 is a scenario with medium emissions in which global temperatures would likely rise up to 3°C by 2100. For the number of days with heavy precipitation events, the 98th percentile of all precipitation days (>1mm/d) was calculated for the 1979-2013 reference period as a threshold for a heavy precipitation event. Then, for each year, the number of days above that threshold was derived. The figures on temperature and precipitation anomaly show the deviation from the mean temperature and mean precipitation for the 1979-2013 reference period. The estimated exposure to future extreme climate impact events (crop failure, drought, river flood, wildfire, tropical cyclone, and heatwave) is based on a published dataset by Lange et al. 2020 derived from ISIMIP2b data. The same global climate models and RCPs as described above were used. Within each 30-year period, the number of years with an extreme event and the average proportion of the site affected were calculated (Kiribou et al. 2024).

Table 7. Estimated past and projected climatological characteristics in Banyang-Mbo Wildlife Sanctuary

1981-2010 2021-2050, RCP 2.6 2021-2050, RCP 6.0 2071-2099, RCP 2.6 2071-2099, RCP 6.0
Mean temperature [°C] 23.7 24.8 24.7 24.9 26
Annual precipitation [mm] 2316 2399 2414 2475 2472
Max no. consecutive dry days (per year) 40.7 31.7 35.9 34.5 38.8
No. days with heavy precipitation (per year) 6.1 6.5 6.1 7 7.2


Table 8. Projected exposure of apes to extreme climate impact events in Banyang-Mbo Wildlife Sanctuary

No. of years with event (2021-2050, RCP 2.6) % of site exposed (2021-2050, RCP 2.6) No. of years with event (2021-2050, RCP 6.0) % of site exposed (2021-2050, RCP 6.0) No. of years with event (2070-2099, RCP 2.6) % of site exposed (2070-2099, RCP 2.6) No. of years with event (2070-2099, RCP 6.0) % of site exposed (2070-2099, RCP 6.0)
Crop failure 3.5 0.41 3.5 0.57 2.5 0.12 4.5 0.14
Drought 0 0 0 0 0 0 0 0
Heatwave 2 100 1.5 100 2 100 3 100
River flood 2.5 1.23 1.75 0.2 2 0.81 5.25 1.72
Tropical cyclone 0 0 0 0 0 0 0 0
Wildfire 30 0.67 30 0.68 29 0.66 29 0.69
  • Precipitation anomaly in Banyang-Mbo Wildlife Sanctuary
  • Temperature anomaly in Banyang-Mbo Wildlife Sanctuary

External links

WWF Banyang-Mbo Wildlife Sanctuary

References

BirdLife International (2020) Important Bird Areas factsheet: Banyang Mbo Wildlife Sanctuary. Downloaded from http://www.birdlife.org on 30/12/2020.
Greengrass, E. J., & Maisels, F. (2007). Conservation of the Nigerian-Cameroon Chimpanzee P. t. vellerosus, (and other mammals) in and around Banyang-Mbo Wildlife Sanctuary, Southwest province, Cameroon. Report, WCS Cameroon Programme, Wildlife Conservation Society, New York.
Kiribou, R., Tehoda, P., Chukwu, O., Bempah, G., Kühl, H. S., Ferreira, J., ... & Heinicke, S. (2024). Exposure of African ape sites to climate change impacts. PLOS Climate, 3(2), e0000345.
Kupsch, D., & Bobo, K. S. (2024). Distribution parameters of large mammals and conservation management in an Afrotropical forest landscape and biodiversity hotspot. African Journal of Ecology, 62(2), e13254.br> Morgan, B. J., Adeleke, A., Bassey, T., Bergl, R., Dunn, A., Fotso, R., ... & Williamson, E. A. (2011). Regional action plan for the conservation of the Nigeria–Cameroon chimpanzee (Pan troglodytes ellioti). IUCN/SSC Primate Specialist Group and Zoological Society of San Diego.


Page completed by: A.P.E.S. Wiki team Date: 08/01/2021

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