浑善达克沙地小毛足鼠的食量与食性动态

Food consumption and feeding characters of Phodopus roborovskii on Hunshandake sandy land of Inner Mongolia.

采用夹捕取样法采集内蒙古浑善达克沙地各月份小毛足鼠的样本,根据对样本的颊囊与胃内容物的组成分析研究了浑善达克沙地小毛足鼠的食性及其季节动态。结果表明,该鼠主要取食植物种子,占其食物组成的85%以上,其余部分为昆虫与植物茎叶。通过对实验室内饲养的小毛足鼠日食量的测定表明,小毛足鼠的日食量(D)与体质量(M)关系可用数学表达式表示为D=1.422×lnM-1.780。结合其种群结构特征,可以计算出小毛足鼠日均消耗2g左右的植物种子。

The Phodopus roborovskii individuals on Hunshandake sandy land of Inner Mongoha were trapped monthly, and the contents in their cheek pouch and stomach were analyzed to study the food consumption and feeding characters of P. roborovskii on the sandy land. The results showed that plant seeds were the main food of P. roborovskii, contributing more than 85% of the food consumption. P. roborovskii also took insects, plant leaves and stems as its food. The daily food consumption of P. roborovskii was highly correlated with its body weight, and the per unit body weight of juvenile P. roborovskii consumed more food than that of the adult. The functional relationship of daily food consumption （D） and body mass （M） could be expressed by D = 1. 422 × lnM - 1. 780. Based on the population structure of P. roborovskii, its daily food consumption was calculated as about 2 g of plant seeds.