Date of this Version
Erforschung biologischer Ressourcen der Mongolei (2012) band 12: 61-76.
The main population of the nominate form Equus hemionus hemionus Pallas, 1775 occurs in the south-east Gobi desert of Mongolia. From 2003 to 2012 we studied the reproductive ecology and mortality of dschiggetajs or khulans (English also ‘hulan’). During these years, the rate of reproduction was variable, ranging from 6.4 % to 23.0 % depending on climate, feeding conditions, and fitness of the mares. Our research shows that there appears to be a relationship between minimum temperatures in June (main foaling time) and rate of successful reproduction. The primary cause of decline in the numerical density of the population of E. hemionus was attributed to poaching. From the original range in Mongolia to the present known distribution, the area in which this species now occurs has decreased in size by about 50 % in the last 70 years. We recommend the development of new strategies for better protection, monitoring, and education of the people of Mongolia on the value of this rare species. Consideration should also be given to a re-introduction of the Wild ass to NE Mongolia and/or the Lake District in western Mongolia.