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Line 44: − The highland gorilla population of KNBP decreased by almost 40% between 1996 and 2000. In the lowland sector, gorillas also appear to have undergone a catastrophic decline during that time, and the forest corridor connecting the two populations was severed (Maldonado et al. 2012). Between 2010 and 2015 there was an estimated 18% increase in the highland gorilla population, and a 64% increase since the drop observed between 1996 and 2000, which is when civil war caused a major decline in gorilla numbers (Spira et al. 2016). Nevertheless, the global Grauer’s gorilla population declined across its range by an estimated 77- 93% in the period of 1995-2015 due to civil war, with approximately 3,800 individuals remaining in the wild (Spira et al. 2016; Plumptre et al. 2015).+ Line 100:
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Kahuzi-Biega National Park (view source)
Revision as of 09:03, 23 November 2023
, 09:03, 23 November 2023no edit summary
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* Eastern chimpanzees (''Pan troglodytes schweinfurthii'') & Grauer's gorillas (''Gorilla beringei graueri'') are present in Kahuzi-Biega National Park.
* Eastern chimpanzees (''Pan troglodytes schweinfurthii'') & Grauer's gorillas (''Gorilla beringei graueri'') are present in Kahuzi-Biega National Park.
* The great ape population size is unknown.
* The gorilla population in the park has been estimated at 1,571 (95% CI 824–2,993) individuals; the chimpanzee population at 2,500 (95% CI: 1,804–3,462).
* The site has a total size of 6,000 km².
* The site has a total size of 6,000 km².
* Poaching linked to mining activities is a key threat to great apes at the site.
* Poaching linked to mining activities is a key threat to great apes at the site.
= 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 -->
Between 1996 and 2000, it has been estimated that the highland gorilla population of KNBP decreased by almost 40%; the lowland population also experienced a decline during this time, and the forest corridor connecting the two populations was severed (Maldonado et al. 2012). Based on Grauer's gorilla is estimated to have declined by 80% in KBNP since the mid-1990s but chimpanzees are estimated to have remained stable.
'''Table 2. Ape population estimates in Kahuzi-Biega National Park'''
'''Table 2. Ape population estimates in Kahuzi-Biega National Park'''
|Line transect (Distance)
|Line transect (Distance)
|WCS and ICCN, as cited by Spira et al. 2016
|WCS and ICCN, as cited by Spira et al. 2016
|
|
|-
|''Pan troglodytes schweinfurthii''
|2011-2019
|2,500 (1,804–3,462)
|
|
|KBNP
|Line transect (Distance) and Index survey (reconnaissance walk)
|Plumptre et al. 2021
|
|
|-
|''Gorilla beringei graueri''
|2011-2019
|1,571 (824–2,993)
|
|
|KBNP
|Line transect (Distance) and Index survey (reconnaissance walk)
|Plumptre et al. 2021
|
|
|
|
Spira, C., Kirkby, A., & Plumptre, A. (2019). Understanding ranger motivation and job satisfaction to improve wildlife protection in Kahuzi–Biega National Park, eastern Democratic Republic of the Congo. Oryx, 53(3), 460-468. doi:10.1017/S0030605318000856
Spira, C., Kirkby, A., & Plumptre, A. (2019). Understanding ranger motivation and job satisfaction to improve wildlife protection in Kahuzi–Biega National Park, eastern Democratic Republic of the Congo. Oryx, 53(3), 460-468. doi:10.1017/S0030605318000856
Plumptre, A.J., Nixon, S., Critchlow, R., Vieilledent, G., Nishuli, R., Kirkby, A., Williamson, E.A., Hall, J.S. & Kujirakwinja, D. (2015). Status of Grauer’s gorilla and chimpanzees in eastern Democratic Republic of Congo: Historical and current distribution and abundance. Unpublished report to Arcus Foundation, USAID and US Fish and Wildlife Service.<br>
Plumptre, A.J., Nixon, S., Critchlow, R., Vieilledent, G., Nishuli, R., Kirkby, A., Williamson, E.A., Hall, J.S. & Kujirakwinja, D. (2015). Status of Grauer’s gorilla and chimpanzees in eastern Democratic Republic of Congo: Historical and current distribution and abundance. Unpublished report to Arcus Foundation, USAID and US Fish and Wildlife Service.<br>
Plumptre, A. J., Kirkby, A., Spira, C., Kivono, J., Mitamba, G., Ngoy, E., ... & Kujirakwinja, D. (2021). Changes in Grauer's gorilla (Gorilla beringei graueri) and other primate populations in the Kahuzi‐Biega National Park and Oku Community Reserve, the heart of Grauer's gorilla global range. American Journal of Primatology, 83(7), e23288.<br>
Maldonado, O., Aveling, C., Cox, D., Nixon, S., Nishuli, R., Merlo, D., Pintea, L. & Williamson, E.A. (2012). Grauer’s Gorillas and Chimpanzees in Eastern Democratic Republic of Congo (Kahuzi-Biega, Maiko, Tayna and Itombwe Landscape): Conservation Action Plan 2012–2022. Gland, Switzerland: IUCN/SSC Primate Specialist Group, Ministry of Environment, Nature Conservation & Tourism, Institut Congolais pour la Conservation de la Nature & the Jane Goodall Institute. 66pp.<br>
Maldonado, O., Aveling, C., Cox, D., Nixon, S., Nishuli, R., Merlo, D., Pintea, L. & Williamson, E.A. (2012). Grauer’s Gorillas and Chimpanzees in Eastern Democratic Republic of Congo (Kahuzi-Biega, Maiko, Tayna and Itombwe Landscape): Conservation Action Plan 2012–2022. Gland, Switzerland: IUCN/SSC Primate Specialist Group, Ministry of Environment, Nature Conservation & Tourism, Institut Congolais pour la Conservation de la Nature & the Jane Goodall Institute. 66pp.<br>
Murnyak, D. F. (1981). Censusing the gorillas in Kahuzi-Biega National Park. Biol. Conservl, 21, 163-76.<br>
Murnyak, D. F. (1981). Censusing the gorillas in Kahuzi-Biega National Park. Biol. Conservl, 21, 163-76.<br>