Complex sentence: Estimated to number more than 200 during the 1970s, more recently Iranian biologist Hormoz Asadi estimated that the number of Asiatic Cheetahs left to be between 50 and 100 and figures for 2005-2006 are between 50 and 60 in the wild.
Split into simpler sentences: Estimated to number more than 200 during the 1970s, more recently Iranian biologist Hormoz Asadi estimated the remaining number to be between 50 and 100. Figures for 2005-2006 suggest between 50 and 60 in the wild.