Journal of
Ecology and The Natural Environment

  • Abbreviation: J. Ecol. Nat. Environ.
  • Language: English
  • ISSN: 2006-9847
  • DOI: 10.5897/JENE
  • Start Year: 2009
  • Published Articles: 371

Full Length Research Paper

Distribution, abundance and population status of Burchell’s zebra (Equus quagga) in Yabello Wildlife Sanctuary, Southern Ethiopia

Reta Regassa1* and Solomon Yirga2
1Yabello Wildlife Sanctuary, PO.Box 34, Oromiya, Ethiopia. 2Department of Biology, Addis Ababa University, PO. Box 1176, Addis Ababa, Ethiopia.
Email: [email protected]

  •  Accepted: 20 February 2013
  •  Published: 31 March 2013

Abstract

A study on the distribution, abundance and population status of Burchell’s zebra (Equus quagga, Gray 1824) was carried out in the Yabello Wildlife Sanctuary, Southern Ethiopia from October, 2009 to March, 2010 including wet and dry seasons. Distance sampling line-transect counting method was used to estimate the population status. A total of 5151 individuals were estimated with a population density of 6.5 km2. The population was female biased. The sex ratio of adult male to adult female was 1.0:1.27 and adult to young ratio was 2.9:0.6. Age composition of Burchell’s zebra comprised 78.2% adult, 13.0% sub-adult, 5.3% juvenile and 3.5% foal. Group size changed seasonally and the mean group size was 12.5. The average herd sizes of one male harem and bachelor stallion herds were 7.8 and 5.3, respectively. Distribution and vegetation utilization of the animal showed a marked preference for open grassland habitat. However, there was a seasonal change in the preference of habitat. Increase in human and livestock population was observed in the study area. Overgrazing by cattle and encroachment are the primary factors that affect the population status of Burchell’s zebra by reducing the grass quality in the Sanctuary. The study recommends an effective and realistic management policy to control illegal human settlement and encroachment in the sanctuary.

 

Key words: Abundance, distribution, Equus quagga, Oromia, population size, Yabello sanctuary.