Does the Luangwa Hippo Population Size and Density Distribution Vary between Upper and Lower Study Blocks? What Are the Management Implications of Such Distribution Pattern?

Chansa Chomba, Twakundine Simpamba, George Kampamba, Vincent Nyirenda

Copperbelt University, Kitwe, Zambia.
School of Agriculture and Natural Resources, Disaster Management Training Centre, Mulungushi University, Kabwe, Zambia.
Zambia Wildlife Authority, Department of Research, Chilanga, Zambia.

DOI: 10.4236/oje.2014.45025                

Abstract

The pattern of population distribution of the common hippopotamus was examined along the 165 km stretch of the Luangwa River in eastern Zambia. The study area was divided between the upper (A-D) and lower (E-H) study blocks. Population data are collected between 1976-2008 and this study 2009-2012 showed a significant difference in the pattern of density distribution between upper and lower study blocks. Upper blocks had higher density of 41/km than lower blocks 29/km. Length of study blocks was discounted as density was used to determine distribution pattern. Results obtained suggest that primary production in each study block as influenced by river geomorphologic features such as river bends and confluences characterized higher hippopotamus density in the upper blocks. Further research is required to investigate other factors that may have interplayed with food (above ground grass biomass) and river meander features to separate upper and lower blocks.

Keywords

Common Hippopotamus, Pattern, Density, Upper Blocks, Lower Blocks

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Chansa, W. and Milanzi, J. (2010) Population Status of the Hippopotamus in Zambia. African Journal of Ecology, 49, 130-132.
[2]	Chomba, C. (2013) Factors Affecting the Luangwa (Zambia) Hippo Population Dynamics within Its Carrying Capacity Band—Insights for Better Management. International Journal of Biodiversity and Conservation, 5, 109-121.
[3]	Chansa, W., Senzota, R., Chabwela, H.N. and Nyirenda, V. (2012) Does Shore Length Influence Population Size and Density Distribution of Hippopotamus? Journal of Ecology and the Natural Environment, 4, 150-153.
[4]	Lewison, R., (2007) Population Responses to Natural and Human-Mediated Disturbances: Assessing the Vulnerability of the Common Hippopotamus (Hippopotamus amphibius). African Journal of Ecology, 45, 407-415. http://dx.doi.org/10.1111/j.1365-2028.2006.00747.x
[5]	Chansa, W., Milanzi, J. and Sichone, P. (2011) Influence of River Geomorphologic Features on Hippopotamus Density Distribution along Luangwa River, Zambia. African Journal of Ecology, 49, 221-226. http://dx.doi.org/10.1111/j.1365-2028.2010.01252.x
[6]	Chansa, W., Senzota, R., Chabwela, H. and Nyirenda, V. (2011) The Influence of Grass Biomass Production on Hippopotamus Population Density Distribution along Luangwa River, Zambia. Journal of Ecology and the Natural Environment, 3, 186-194.
[7]	Attwell, R.I.G. (1963) Surveying Luangwa Hippo. Puku, 1, 29-49.
[8]	Darling, F.F. (1960) Wildlife in African Territory. Oxford University Press, London.
[9]	Tembo, A. (1987) Population Status of the Hippopotamus on the Luangwa River, Zambia. African Journal of Ecology, 25, 71-77. http://dx.doi.org/10.1111/j.1365-2028.1987.tb01094.x
[10]	Onyango, J.P. and Plews, A.M. (2005) A Text Book of Basic Statistics. East African Educational Publishers, Nairobi.
[11]	Dytham, C. (2004) Choosing and Using Statistics: A Biologists’s Guide. Blackwell Publishing, Victoria.
[12]	Fowler, J., Cohen, L. and Jarvis, P. (1998) Practical Statistics for Field Biology. John Wiley and Sons, New York.
[13]	Anon. (2007) South Luangwa Area Management Annual Report. Zambia Wildlife Authority, Mfuwe.
[14]	Jachmann, H. and Billiouw, M. (1997) Elephant Poaching and Law Enforcement in the Central Luangwa Valley, Zambia. Journal of Applied Ecology, 33, 1241-1250.
[15]	Naiman, R.J. and Rogers, H.K. (1997) Large Animals and System-Level Characteristics in River Corridors. Bioscience, 47, 521-529. http://dx.doi.org/10.2307/1313120
[16]	Sichingabula, H. (1998) Hydrology, Character of Channel Changes on Luangwa River, Their Impacts and Implications on Tourism, South Luangwa National Park and Adjacent Game Management Areas. Report Prepared for EDF/NPWS towards the Development of a General Management Plan for South Luangwa National Park and Adjacent Game Management Areas, Chilanga.
[17]	Anon. (2008) Report to Zambia Wildlife Authority on the Hippopotamus Survey. Chinzombo Research Centre, Chilanga.
[18]	Child, G. (1999) An Evaluation of the Hippopotamus Impacts on Habitats along the Luangwa River. A Report Submitted to the Norwegian Agency for International Development, Chipata.
[19]	Barnes, R.F.W. and Kapela, E.B. (1991) Changes in Ruaha Elephant Population Caused by Poaching. African Journal of Ecology, 29, 289-294. http://dx.doi.org/10.1111/j.1365-2028.1991.tb00466.x
[20]	Bere, R.M. (1959) Queen Elizabeth National Park, Uganda: The Hippopotamus Problem and Experiment. Oryx, 5, 116-124. http://dx.doi.org/10.1017/S0030605300000454
[21]	Moreau, J. (1997) Advances in the Ecology of Lake Kariba. Print Holdings, Harare.
[22]	Stocher, J.S.B., Stewart, D.R.M. and Breen, C. (1978) The Diet of the Hippopotamus in Ndumu Game Reserve, Natal, as Determined by Faecal Analysis. South African Journal of Wildlife Resources, 8, 1-11.