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Hirola Antelope in Arawale National Reserve: Population Size and Distribution Study

This T.E.P. project examines the population size and distribution of the critically endangered Hirola Antelope in Arawale National Reserve, Kenya. The study explores their habitat preferences, threats, and the human-livestock-wildlife interfaces.

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Hirola Antelope in Arawale National Reserve: Population Size and Distribution Study

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  1. T E P project The Population size and distribution of critically endangered Hirola Antelope (Beatragus hunteri) in Arawale National Reserve, Kenya Francis Kamau Muthoni Terra Nuova East Africa Transboundary Environmental Project

  2. Hirola Profile • Diet: mostly grass • Weight: 75 - 160 kg • Mean group size: 7- 8 • Gestation: 7 months • Sexually mature: 2 years • Habitat: seasonally arid region of grassy plains btwn acacia bush and coastal forest 10th SCGIS Conference, Monterey, CA

  3. Study Area • Area: 540 Km2 • Only in-situ conservation initiative for hirola • 6 species of conservation interest • Gazetted 1973 • Protection collapsed 1988 10th SCGIS Conference, Monterey, CA

  4. Historical Range of Hirola • 38,400 Km2 in Kenya and Somalia (1960’s) • 19,158 Km2 in Kenya (1960’s) • Current 9,177 Km2 • 14,000 in 1960’s • 1,000 - 2000 Today 10th SCGIS Conference, Monterey, CA

  5. Transects are lined down considering areas of interest or relevance Transect counts are performed by moving along the identified line on foot/vehicle All observations are recorded in specific forms and geo-referenced with GPS Transect counts are performed on the same, day and at the same time each month Transect Methodology 10th SCGIS Conference, Monterey, CA

  6. Population Estimates • Using N= (nZ/T)2W Where: • N = Population size in the whole survey zone. (Dahiye, 1999) • n = Population size in transects (monthly average) • Z = total area of the survey zone • T = Length of the transect • W= Width of the transect. N= (45*540/70)0.2 10th SCGIS Conference, Monterey, CA

  7. Population Size & Density • Total Sighted: 534 • Groups: 87 • Mean: 45 • Population Size: 69 • Density: 0.13/Km2 • Mean Groups Size: 6.1 10th SCGIS Conference, Monterey, CA

  8. Seasonal Distribution • Total Individuals - Dry 59% - Wet 41% • Groups Sightings - Dry 68%- Wet 32% 10th SCGIS Conference, Monterey, CA

  9. Distribution of hirola in ANR. 10th SCGIS Conference, Monterey, CA

  10. Habitat Preferences 10th SCGIS Conference, Monterey, CA

  11. Human-Livestock-Wildlife interfaces 10th SCGIS Conference, Monterey, CA

  12. Livestock Grazing 10th SCGIS Conference, Monterey, CA

  13. Threats • Habitat degradation • Drought • Poaching • Competition with livestock • Predation • Inbreeding 10th SCGIS Conference, Monterey, CA

  14. T E P project Acknowledgements Thank You Email: frakamuus@yahoo.com 10th SCGIS Conference, Monterey, CA

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