There were more than 300 roan antelopes in Ruma park and on the Kanyamwa escarpment, at the edge of the park.
figure By RUPI MANGAT At the Nyatote gate of Ruma National Park in Lambwe Valley near Lake Victoria, metal casts of the roan antelope (Hippotragus equines langheldi) are nailed to the gates.This subspecies of the antelope, with its face that looks like it was painted by a make-up artist, is only found in Ruma.
The VORTEX PVA model was used to simulate the population of roan antelopes in Ruma National Park (1) to replicate the observed population decline for past 30 years and (2) to project the future population viability over a 100-year period.
Studies in South Africa have found out that adult mortality rates of 15% or more severely restricts the recovery potential of roan antelopes .
Establishing an intensively managed protected sanctuary for roan antelopes in RNP can provide a "seed population" that can be used to establish several other populations in the roan's former known ranges in Kenya.
Rushton, "Habitat suitability modelling and implications for management of roan antelopes in Kenya," African Journal of Ecology, vol.
Table 1: Biological and ecological attributes of roan antelopes used as input data in the baseline scenario to the VORTEX model.
One-third of the total population of roan antelope (Hippotragus equinus) of about 76,000 is now thought to occur in only 4 countries: Burkina Faso, Cameroon, Zambia, and Tanzania .
PVA has been used in the past to model the viability of roan antelope populations and assess consequences of alternative management options .
The third area is the Linyanti Marsh, adjacent to two rivers, known for large numbers of lions, leopards, wild dogs, roan antelopes
, sable, hippopotamus and herds of elephants.