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Declining population of the Vulnerable common hippopotamus Hippopotamus amphibius in Bénoué National Park, Cameroon (1976–2013): the importance of conservation presence

  • Paul Scholte (a1) and Emmanuel Iyah (a2)
Abstract
Abstract

Populations of the common hippopotamus Hippopotamus amphibius have undergone widespread decline as a result of habitat conversion and hunting for bushmeat and, increasingly, for ivory. North Cameroon holds important populations of large mammals, including the hippopotamus. The species' status and population trend are poorly known, and led CITES to suspend trade in hippopotamus trophies in 2013. Using the methodology of surveys conducted during 1976–1987, we conducted counts of the hippopotamus in Bénoué National Park during the wet season of 2011 and dry season of 2013, and drew on unpublished biannual density counts conducted by the Garoua Wildlife College, Cameroon, during 1989–2010. Counts along the 100 km stretch of the Bénoué River in the Park indicated a reduction from 400 individuals in 1987 to 188 in 2013. However, linear densities along a 15–32 km stretch in proximity to the Park headquarters and two tourist camps were constant during 1976–2013 (c. 3.7 individuals km−1). Hippopotamus distribution was negatively associated with the presence of the camps of gold diggers, which occupied the northern half of the Park. Observations of antelopes suggested they had a comparable distribution, unlike primates, which were distributed relatively evenly. Our results show the importance of year-round conservation presence in the Park, which could be achieved with adequate personnel, a functional road system, and reinforcement of operations in neighbouring sport-hunting areas.

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Corresponding author
(Corresponding author) E-mail PaulT.Scholte@gmail.com
References
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P. Bouché , R.F. Nzapa Mbeti Mange , F. Tankalet , F. Zowoya , P. Lejeune & C. Vermeulen (2012) Game over! Wildlife collapse in northern Central African Republic. Environmental Monitoring and Assessment, 184, 70017011.

A.G. Bruner , R.E. Gullison , R.E. Rice & G.A.B. da Fonseca (2001) Effectiveness of parks in protecting tropical biodiversity. Science, 291, 125128.

T. Caro & P. Scholte (2007) When protection falters. African Journal of Ecology, 45, 233235.

H. Fritz & P. Duncan (1994) On the carrying capacity for large ungulates of African savanna ecosystems. Proceedings of the Royal Society of London B, 256, 7782.

P.A. Lindsey , G.A. Balme , V.R. Booth & N. Midlane (2012) The significance of African lions for the financial viability of trophy hunting and the maintenance of wild land. PLoS ONE, 7(1), e29332.

F. Maisels , S. Strindberg , S. Blake , G. Wittemyer , J., Williamson, E.A. Hart (2013) Devastating decline of forest elephants in Central Africa. PLoS ONE, 8(3), e59469.

T.S. McCarthy , W.N. Ellery & A. Bloem (1998) Some observations on the geomorphological impact of hippopotamus (Hippopotamus amphibius L.) in the Okavango Delta, Botswana. African Journal of Ecology, 36, 4456.

J. Ngog Nje (1988) Contribution à l’étude de la structure de la population des hippopotames (Hippopotamus amphibius L.) au Parc National de la Bénoué (Cameroun). Mammalia, 52, 149158.

J.O. Ogutu , N. Owen-Smith , H.-P. Piepho & M.Y. Said (2011) Continuing wildlife population declines and range contraction in the Mara region of Kenya during 1977–2009. Journal of Zoology, 285, 99109.

M.A. Stark (1986) The numbers, seasonal distribution patterns, densities and biomass of the large herbivores, Bénoué National Park, Cameroon. Mammalia, 50, 341350.

M.A. Stark & R.J. Hudson (1985) Plant communities’ structure in Bénoué National Park, Cameroon: a cluster association analysis. African Journal of Ecology, 23, 2127.

R.J.T. Verweij , J. Verrelst , P.E. Loth , I.M.A. Heitköenig & A.M.H. Brunsting (2006) Grazing lawns contribute to the subsistence of mesoherbivores on dystrophic savannas. Oikos, 114, 108116.

R.B. Weladji & M.N. Tchamba (2003) Conflict between people and protected areas within the Bénoué Wildlife Conservation Area, North Cameroon. Oryx, 37, 7279.

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Oryx
  • ISSN: 0030-6053
  • EISSN: 1365-3008
  • URL: /core/journals/oryx
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