species of rodent in Ganquan County belong to 2 orders , 5 families and 10 genus , in which 12 species belong to Muridae , Cricetidae and Sciuridae that is 85.7 % of total species . The wide distributed species is 21.7 % , oriental kingdom species is 7.2 % , ancient Norther kingdom species is 71.4 % .
A preliminary study of the age structure in the populations of the mountain rats , rattus Niviventer confucianus and Rattus fulvescens huang ( rodentia : Muridae )
