关键词: 鄂尔多斯沙地, 小家鼠, 生物学特性

Abstract: To investigate the biological properties of Mus musculus, snap-trapping was used in the middle ten-days of every month from April to October during 1991 to 1996 in different habitats of Ordos sandland. The results showed that Mus musculus was uncommon species which accounts for only 2% of the total rodent number in the area. The optimum habitats of Mus musculus were low-lying lands among dunes, while wind-drifed dunes were the most unsuitable habitats. A total number of 162 specimens were collected and dissected. All the specimens were divided into four age groups based on their body weight excluding viscera. The body weight excluding viscera was ≤6.9g for group Ⅰ (juveniles), 7.0～8.9g for group Ⅱ (subadults), 9.0～12.9g for group Ⅲ(adults) and ≥13.0g for group Ⅳ(old ages). Their breeding period was from March to October and litter size was 7.08±1.90.