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Density and distribution of chimpanzee (Pan troglodytes verus, Schwarz 1934) In the forest zone of Mont Sangbe National Park, West of Cote d’Ivoire

Célestin Yao Kouakou, Antoine Kouamé N’guessan, Jean-Baptiste Koffi Koffi, Alex Ange Beda, Moise Zannou, Jean-Claude Koffi Bene

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Int. J. Biosci.20(1), 29-36, January 2022

DOI: http://dx.doi.org/10.12692/ijb/20.1.29-36


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The loss of biodiversity mainly due to human activities is a global concern. The survival of wild mammals, including the West African chimpanzee (Pan troglodytes verus), which is considered a critically endangered species, is threatened. However, information on the status of the remaining populations of such a primate and its distribution is rarely available or out of date for some sites. This study aims at improving the knowledge of the west chimpanzee population density and distribution in Mont Sangbé National Park (MSNP), West Côte d’Ivoire, for conservation purposes. We counted chimpanzee sleeping nests along 64 line transects of one kilometer each in the forest area of the MSNP by following distance sampling methods. Then, we recorded the GPS coordinates of all signs of the presence of the species during transects and recce surveys. We observed 148 signs of the presence of chimpanzees including 94 nests counted along transects. The average density of chimpanzees in the forest area of MSNP was estimated at 0.25 individuals/km² and 0.48 individuals/km² when using a value of a lifetime of nests of 164.38 days and 84.38 days, respectively. In addition, the distribution map showed that the signs of the presence of chimpanzees are mainly observed in two areas: the southern and the north-eastern forest areas of the MSNP. We recommend the application of other survey methods (genetics, camera trapping, nest counts combined with the modeling of nest lifetime estimates) for a better understanding of the chimpanzee population ecology and for conservation management in the PNMS.


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Density and distribution of chimpanzee (Pan troglodytes verus, Schwarz 1934) In the forest zone of Mont Sangbe National Park, West of Cote d’Ivoire

Baldwin PJ, Sabatier PJ, Mcgrew WC, Ceg T. 1981. Comparisons of nests made by different populations of chimpanzees (Pan troglodytes). Primates 22, 474-486. http://dx.doi.org/10.1007/BF02381239

Bessone M, Booto L, Santos AR, Ku¨hl HS, Fruth B. 2021. No time to rest: How the effects of climate change on nest decay threaten the conservation of apes in the wild. PLoS ONE 16(6), e0252527. https://doi.org/10.1371/journal. pone.0252527

Boesch C, Boesch-Achermann H. 2000. The chimpanzees of the Taï Forest: behavioral ecology and evolution. Oxford, England: Oxford University, p 316.

Boesch C, Crockford C, Herbinger I, Wittig R, Moebius Y, Normand E. 2008. Intergroup conflicts among chimpanzees in Tai National Park: lethal violence and the female perspective. American Journal of Primatology 70, 519-32. http://dx.doi.org/10.1002/ajp.20524

Buckland ST, Anderson DR, Burnham KP, Laake JL, Borchers DL, Thomas L. 2001. Introduction to distance sampling: estimating abundance of biological populations, Oxford; New York, Oxford University Press, p 432.

Campbell G, Kuehl H, N’Goran PK, Boesch C. 2018. Alarming decline of West african chimpanzees in Côte d’Ivoire. Current Biology 18, 903–904. http://dx.doi.org/10.1016/j.cub.2008.08.015

Chapman CA, Wrangham RW. 1993. Range Use of the Forest Chimpanzees of Kibale – Implications for the Understanding of Chimpanzee Social-Organization. American Journal of Primatology 31, 263-273. http://dx.doi.org/10.1002/ajp.1350310403

Chapman CA, Onderdonk DA. 1998. Forests without primates: Primate/plant codependency. American Journal of Primatology 45, 127-141. http://dx.doi.org/10.1002/(SICI)1098-2345(1998)45:1<127::AID-AJP9>3.0.CO;2-Y

Fruth B, Hohmann G. 1996. Nest building behavior in the great apes: The great leap forward? In Mcgrew W.C., Marchant L.F. and Nishida T. (Eds.) Great Ape Societies. Cambridge, Cambridge University Press, p 225 – 240.

Humle T, Boesch C, Campbell G, Junker J, Koops K, Kuehl H, Sop T. 2016. Pan troglodytes ssp. verus. The IUCN Red List of Threatened Species. http://dx.doi.org/10.2305

Inoue T, Nakamura K, Salmah S, Abbas I. 1993. Population dynamics of animals in unpredictably-changing tropical environments. Journal of Biosciences 4, 425-455. http://dx.doi.org/10.1007/BF02703078

Kouakou YC, Boesch C, Kuehl H. 2009. Estimating Chimpanzee Population Size with Nest Counts: Validating Methods in Taï National Park. American Journal of Primatology 71, 447-457. http://dx.doi.org/10.1002/ajp.20673

Kouakou YC. 2014. Le recensement des chimpanzés sauvages en forêt tropicale humide : validation de deux méthodes de comptages indirects et élaboration d’une approche pour la localisation des groupes sociaux au Parc national de Taï. Thèse de Doctorat en Sciences de la Nature, Université Nangui Abrogoua, (Abidjan, Côte d’Ivoire), p 105.

Lauginie F. 2007. Conservation de la nature et aires protégées en Côte d’Ivoire. NEI et Afrique Nature, Abidjan, p 211-544.

Li J, Heap AD. 2008. A Review of Spatial Interpolation Methods for Environmental Scientists. Geoscience Australia, Canberra, p 137.

Marchesi P, Marchesi N, Fruth B, Boesch C. 1995. Census and Distribution of Chimpanzees in Cote-Divoire. Primates 36, 591 – 607. http://dx.doi.org/10.1007/BF02382880

Milton K. 1981. Distribution patterns of tropical plant foods as an evolutionary stimulus to primate mental development. American Anthropologist 83(3), 534-548. http://dx.doi.org/10.1525/aa.1981.83.3.02a00020

N’goran KP, Yapi AF, Herbinger I, Tondossama A, Boesch C. 2011. Etat du Parc National de Taï: Rapport de résultats de biomonitoring phase VI : p 15.

Nichols JD, Williams BK. 2006. Monitoring for conservation. Trends in Ecology & Evolution 21(12), 668–673. PMID: 1691936. https://doi.org/10.1016/j.tree.2006.08.007

Normand E, Singo B, Boesch C. 2010. Rapport de suivi écologique dans les forêts classées de Goin-Débé et de Cavally (2007-2010). Rapport d’activité WCF, 42 p.

Norro L. 2017. Biodiversité: conséquences de son érosion et dépendance du secteur pharmaceutique. Thèse de Doctorat, Louvain School of Management, Université catholique de Louvain, p 83.

OIPR. 2017. Stratégie de gestion des parcs nationaux et réserves de Côte d’Ivoire, Table ronde- initiative Cacao-Forêts, Rapport de réunion, p 14.

Plumptre AJ, Reynolds V. 1996. Censusing chimpanzees in the Budongo Forest, Uganda. International Journal of Primatology 17, 85-99. PMID: 1691936. https://doi.org/10.1007/BF02696160

Ordaz-Németh I, Sop T, Amarasekaran B, Bachmann M, Boesch C, Brncic T, Caillaud D, Campbell G, Carvalho J, Chancellor R, Davenport TRB, Dowd D, Eno-Nku M, GanasSwaray J, Granier N, Greengrass E, Heinicke, S, Herbinger I, Inkamba-Nkulu C, Kühl HS. 2021. Range‐wide indicators of African great ape density distribution. American Journal of Primatology, e23338.

Plumptre AJ, Reynolds V. 1997. Nesting behavior of chimpanzees: Implications for censuses. International Journal of Primatology 18, 475 – 485. https://doi.org/10.1023/A:1026302920674

Tutin CEG, Frenandez M. 1984. Nationwide Census of Gorilla (Gorilla-GGorilla) and Chimpanzee (Pan-T-troglodytes) Populations in Gabon. American Journal of Primatology 6, 313-336. https://doi.org/10.1002/ajp.1350060403

Tweh CG, Menladi ML, Kouakou YC, Annika H, Hjalmar SK, Jessica J. 2014. Conservation status of chimpanzees Pan troglodytes verus and other large mammals in Liberia: a nationwide survey, p 9.