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Population Status and Trend of the Maasai Ostrich in the Mid Kenya—Tanzania Borderland

DOI: 10.4236/nr.2016.710047, PP. 558-579

Keywords: Borderland, Kenya, Maasai Ostrich, Population Trend and Status, Tanzania

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The Maasai ostrich (Struthio camelus) is a the largest avian species in East Africa and though it’s not considered to be a species of conservation concern, some populations are on the decline and this is attributed to bush meat activities, predation on their eggs illegal consumption by humans, habitat destruction and forage competition with other large wildlife species. Climate change is also emerging to be another major threat due to interference with food availability which in turn interferes with the breeding rhythm. Thus, this study examined the population status, trend and distribution of the Maasai ostrich in the Southern Kenya and Northern Tanzania borderland after the 2007 to 2009 drought. The results showed that the species was found across the entire borderland but the Amboseli region had the highest number and density of Maasai ostrich (726.00 ± 100.9; 0.08 ± 0.01 ostriches per km2), followed by Lake Natron area (330.8 ± 69.8; 0.05 ± 0.01 ostriches per km2) and the least was in West Kilimanjaro (85.5 ± 18.0; 0.03 ± 0.01 ostriches per km2). Drought caused a decline in the population of the Maasai ostrich but the Amboseli area experienced the highest decline in density (?13.44 ± 12.61) compared to other borderland sectors. However, the populations increased in most sectors after the drought, and wet season numbers and densities were higher than the dry season. The highest positive increase in number and density was in Lake Natron area (+85.65 ± 91.06) followed by West Kilimanjaro (+68.39 ± 59.54), and the least was in the Magadi area (+22.26 ± 32.05). There is a need to enhance conservation of avian species like the Maasai ostrich other than just focusing on the charismatic species such as the African elephant and black rhino. We therefore recommend joint collaboration in monitoring all large wildlife populations across the Kenya-Tanzania borderland with a view of understanding their status, trend and best management actions that can enhance their conservation.


[1]  Sibley, C.G. and Monroe, B.L.J. (1990) Distribution and Taxonomy of Birds of the World. Yale University Press, New Haven.
[2]  Brown, J.H., Urban, E.K. and Newman, K. (1992) The Birds of Africa, Vol. 1. Academic Press, London.
[3]  Stevenson, T. and Fanshawe, J. (2002) Field Guide to the Birds of East Africa. T & D Poyser.
[4]  Zim, H.S. (2000) Ostriches. William Morrow, New York.
[5]  Zimmerman, D.A., Donald, A.T. and Pearson, D.J. (1999) Birds of Kenya and Northern Tanzania. Princeton University Press, Princeton.
[6]  Milton, S.J., Dean, W.R.J. and Siegfried, W.R. (1994) Food Selection by Ostrich in Southern Africa. Journal of Wildlife Management, 58, 234-248.
[7]  Sauer, E.G.F. and Sauer, E.M. (1966) The Behavior and Ecology of the South African Ostrich. The Living Bird, 5, 45-75.
[8]  Cloudsley-Thompson, J.L. and Mohamed, E.R.M. (1967) Water Economy of the Ostrich. Nature, 216, 1040.
[9]  Withers, P.C. (1983) Energy, Water, and Solute Balance of the Ostrich Struthio camelus. Physiological and Biochemical Zoology, 56, 568-579.
[10]  Louw, G.N., BeLouie, P.C. and Coetzee, H.J. (1969) Renal Function, Respiration, Heart Rate and Thermoregulation in the Ostrich (Struthio camelus). Scientific Papers of the Namib Desert Research Station, 42-54.
[11]  Leuthold, W. (1977) Notes on the Breeding Biology of the Ostrich (Struthio camelus) in Tsavo East National Park, Kenya. IBIS, 119, 541-544.
[12]  Bertram, B.C.R. (1992) The Ostrich Communal Nesting System. Princeton University Press, Princeton.
[13]  BirdLife International (2004) Struthio camelus. IUCN Red List of Threatened Species.
[14]  Campbell, K. and Hofer, H. (1995) People and Wildlife: Spatial Dynamics and Zones of Interaction. In: Sinclair, A.R.E. and Arcese, P., Eds., Serengeti II: Dynamics, Management, and Conservation of an Ecosystem, The University of Chicago Press, Chicago and London, 534-570.
[15]  Hofer, H., Campbell, K.L.I., East, M.L. and Huish, S.A. (1996) The Impact of Game Meat Hunting on Target and Non-Target Species in the Serengeti. In: Taylor, J. and Dunstone, N., Eds., The Exploitation of Mammal Populations, Chapman and Hall, London, 117-146.
[16]  Ostrowski, S., Massalatchi, M.S. and Mamane, M. (2001) Evidence of a Dramatic Decline of the Red-Necked Ostrich Struthio camelus camelus in the Aïr and Ténéré National Nature Reserve, Niger. Oryx, 35, 349-352.
[17]  Diamond, A.W. (1986) A Global View of Cultural and Economic Uses of Birds. In: Diamond, A.W. and Filion, F.L., Eds., The Value of Birds, Technical Publication 6, International Council for Bird Preservation Cambridge, UK, 99-109.
[18]  Thiollay, J.M. (2006) Large Bird Declines with Increasing Human Pressure in Savanna Woodlands (Burkina Faso). Biodiversity & Conservation, 15, 2085-2108.
[19]  Thiollay, J.M. (2006) Severe Decline of Large Birds in the Northern Sahel of West Africa: A Long-Term Assessment. Bird Conservation International, 16, 353-365.
[20]  Collar, N.J., Long, A.J., Robles, G.P. and Rojo, J. (2007) Birds and People: Bonds in a Timeless Journey. CEMEX, Mexico City.
[21]  Kruuk, H. (1972) The Spotted Hyena. University of Chicago Press, Chicago.
[22]  Akama, J.S. (1998) The Evolution of Wildlife Policies in Kenya. Journal of Third World Studies, 15, 103-117.
[23]  Kameri-Mbote, P. (2005) Land Use and Sustainability in Kenya: Towards Innovative Use of Properties Rights in Wildlife Management. International Environmental Law Research Centre.
[24]  WRI (World Resource Institute) (2005) Earth Trends Data Tables: Biodiversity and Protected Areas. World Resource Institute, Washington DC.
[25]  Herremanns, M. (1998) Conservation Status of Birds in Botswana in Relation to Land Use. Biological Conservation, 86, 139-160.
[26]  Caro, T.M. (1999) Densities of Mammals in Partially Protected Areas: The Katavi Ecosystem of Western Tanzania. Journal of Applied Ecology, 36, 205-217.
[27]  Loibooki, M., Hofer, H., Campbell, K.L.I. and East, M. (2002) Bush Meat Hunting by Communities Adjacent to the Serengeti National Park, Tanzania: The Importance of Livestock Ownership and Alternative Sources of Protein and Income. Environmental Conservation, 29, 391-298.
[28]  Kameri-Mbote, P. (2005) Land Use and Sustainability in Kenya: Towards Innovative Use of Properties Rights in Wildlife Management. International Environmental Law Research Centre (IELRC) Working Paper 2005-4.
[29]  Pelkey, N.W., Stoner, C.J. and Caro, T.M. (2000) Vegetation in Tanzania: Assessing Long Term Trends and Effects of Protection Using Satellite Imagery. Biological Conservation, 94, 297-309.
[30]  Møller, A.P., Fiedler, W. and Berthold, P., Eds. (2010) Effects of Climate Change on Birds. Oxford University Press, Oxford.
[31]  Martin, R. (2011) Book Review: Effects of Climate Change on Birds. Ostrich, 82, 249-250.
[32]  Jarvis, M.J.F., Jarvis, C. and Keffen, R.H. (1985) Breeding Seasons and Laying Patterns of the South African Ostrich (Struthio carnelus). IBIS, 1271, 442-449.
[33]  NOOA (2008) Droughts: Public Fact Sheet. National Weather Service.
[34]  PDNA (2011) Kenya Post-Disaster Needs Assessment (PDNA) 2008-2011 Drought. Government of Kenya, Nairobi, Kenya.
[35]  Ntiati, P. (2002) Group Ranches Subdivision Study in Loitokitok Division of Kajiado District. Land Use Change Impacts and Dynamics (LUCID) Working Paper 7, International Livestock Research Institute (ILRI), Nairobi.
[36]  Okello, M.M. and D’Amour, D.E. (2008) Agricultural Expansion within Kimana Electric Fences and Implications for Natural Resource Conservation around Amboseli National Park, Kenya. Journal of Arid Environments, 72, 2179-2192.
[37]  Reid, R., Gachimbi, L., Worden, J., Wangui, E., Mathai, S., Campbell, D., Maitima, J., Butt, B., Gichohi, H. and Ogol, E. (2004) Linkages between Changes in Land Use, Biodiversity and Land Degradation in the Loitokitok Area of Kenya. Land Use Change Impacts and Dynamics (LUCID) Working Paper Series 49, 1-29.
[38]  Dirschl, H., Norton-Griffiths, M. and Wetmore, S.P. (1981) Training Observers for Aerial Surveys of Herbivores. Wildlife Society Bulletin, 9, 108.
[39]  Douglas-Hamilton, I., Gachago, S., Litoroh, M. and Mirangi, J. (1994) Tsavo Elephant Count 1994. Report to the Kenya Wildlife Service, Nairobi, Kenya.
[40]  Zar, J.H. (1999) Biostatistical Analysis. 4th Edition, Prentice Hall, Upper Saddle River.
[41]  Western, D., Groom, R. and Worden, J. (2009) The Impact of Subdivision and Sedentarization of Pastoral Lands on Wildlife in an African Savanna Ecosystem. Biological Conservation, 142, 2538-2546.
[42]  Western, D. (1982) Amboseli National Park: Enlisting Landowners to Conserve Migratory Wildlife. Ambio, 11, 302-308.


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