A preliminary population viability analysis of the critically endangered blue-eyed black lemur (Eulemur flavifrons).

Population viability analysis is an important tool to assess the extinction risk in small populations of highly specialized primates. The blue-eyed black lemur (Eulemur flavifrons) is critically endangered with a restricted range in the north-western dry deciduous forest of Madagascar, where habitat fragmentation and loss of forest connectivity threaten its survival. We performed a population viability analysis (PVA) of this lemur in Ankarafa Forest in the Sahamalaza Peninsula National Park, north-western Madagascar, to determine the demographic parameters most influential for population persistence and to assess extinction probabilities. We conducted PVA analyses using different demographic parameters which characterize the species including reproduction, lifespan and population size using the software VORTEX for six scenarios with 100 iterations and simulated over 100 years. The simulations suggested the first extinction within 13 years when the percentage of habitat destruction increased up to 12%. Severe habitat destruction such as fire and logging was the major cause which led to the risk of population extinction. Conservation strategies, in particular measures to reduce habitat destruction, are proposed to ensure the survival of this critically endangered lemur. [ABSTRACT FROM AUTHOR]