Effects of habitat loss and limitation on effective population size and inbreeding rates of Walia ibex (Capra walie) in Ethiopia uri icon

abstract

  • The effects of habitat loss and limitation on effective population size and inbreeding rates of Walia ibex (Capra walie) were assessed at Simien Mountains National Park. Total direct census was conducted in 2009. Historical data were obtained from park offices and literatures. Effective population sizes (Ne), inbreeding rates (Delta F) and heterozygosity losses to the whole and subdivided population per habitat were estimated. Correlations (r) between the two repeated direct censuses were positive (r = 0.99, P < 0.01). The mean Ne and Delta F (%/year) per study sites were 65.34 +/- 59.45 and 0.0286 +/- 0.032, respectively. The Delta F of the whole population of C.similar to walie was 0.228 +/- 0.011. The Delta F was negatively correlated with Ne (r = -0.799, P < 0.05). The mean Delta F per fragmented habitat ranged from 0.3 (Cheneck) to 7.7% (Buait ras). The highest Delta Fs per year were observed in Buait ras (7.7%), Adarmaz (7.4%) and Sankaber (4.5%). The mean heterozygosity loss per total population was 0.235 +/- 0.42, which was about 23.5%. The differences in Ne and Delta F among the population per habitat were the results of habitat limitation, which in turn reduce the genetic variability and foster losses of heterozygosity.

publication date

  • 2012
  • 2012