田鼠亚科鼠类年龄划分探讨

通过分析布氏田鼠的生活史特征证明,在划分田鼠亚科鼠类年龄组时,考虑生理学年龄十分必要。运用胴体重分布区分出越冬田鼠与当年生田鼠颇为重要,但应用形态学或时间学年龄指标来划分年龄组似无必要。作者认为,刘于当年生田鼠,只需划分为性成熟和性不成熟两组即可。

Discussion on the Age Group Determination of microtine rodents

By analysing the characteristic of life history of Brandt's voles, the author shows that it is necessary considering the physiological age in determining the age groups of microtine rodents. It is very important to distinguish the overwinterings from the votes born of this year by the net body mass distribution. But is not necessary to determine the age groups by morphological or chronological age indexes. The author suggest that for yearly Brandt's voles born of this year should be divided into two groups which is sex-maturing group and sex-non-maturing group.