检查长爪沙鼠 870 1只 ,雄性 391 5只 ,占 45 .0 0 % ;雌性 4786只 ,占 55.0 0 % ;雄雌比为 1∶1 .2 2。不同年度性别比例有差异 ,同一年度不同季节也有差别。种群年龄组成 ,幼年组 1 2 0 7只 ,占 1 3 .87% ;亚成年组 3452只 ,占 39.67% ;成年组 30 0 2只 ,占 34 .50 % ;老年组 1 0 4 0只 ,占 1 1 .95 %。多数年份以亚成年组构成比最高 ,依次为成年组、幼年组、老年组最低。 A total of 870 gerbils were examined, 391 males were male, accounting for 45.0%; 4786 females, accounting for 55.0%; and male-female ratio was 1: 1 .2 2. There are differences in the sex ratio in different years and in different seasons in the same year. The age of the population was 1270 in the juvenile group, accounting for 13.87%; 3452 in the sub-adult group, accounting for 39.67%; 30 0 2 in the adult group, accounting for 34.5%; and 104 in the elderly group, Accounting for 11.95%. In most years, the sub-adult group has the highest composition ratio, followed by the adult group, the juvenile group and the elderly group.