BY LIVESTOCK IN ARID RANGELANDS OF CHOLISTAN DESERT (PAK ISTAN) M. Abdullah 1, * , M. Rafay 2 , T. Hussain 2 , H. Ahmad 3 , U. Tahir 4 , F. Rasheed 5 , T. Ruby 6 and S. Khalil 2 1 Cholistan Institute of Desert Studies, 2 Department of Forestry Range and Wildlife Management, 3 Department of Animal