黑线仓鼠胴体重长指标的研究

黑线仓鼠（Ｃｒｉｃｅｔｕｌｕｓｂａｒａｂｅｎｓｉｓ）是华北平原最主要的农田害鼠之一，本文用胴体重代替体重采用数理统计方法，分析了其胴体重与体长之比（即胴体重长指标）的年龄、性别、季节、年度变化，结果除年度变化外，均发现有显著性差异，雄性的该值较雌性的大得多，同性相比，Ⅳ龄组最大，在１９８７１９８９年间的种群密度下，其胴体重长指标与种群密度间没有相关关系

ON THE WEIGHT(EXCLUDING VISCERA)/LENGTH INDEX OF THE STRIPED HAMSTER(Cricetulus barabensis)

Striped hamster (Cricetulus barabensis) was one kind of the chiefharmful rodent in the plain of North China. The authors in this paper havestatistically analysed with respect to the age characteristics,sexual differencs,monthly changes and yearly variations of the weight (excluding viscera)/lengthindex in Striped hamster.The materials indicated that the aduts had higher K WL ′values than the other groups;the juveniles had the lowest K WL ′ values in thefive groups; the males had higher K WL ′ values than the females. There weresignificance of monthly and yearly variations with respect to the K WL ′ values.The K WL ′ values of Striped hamster was highest in February and lowest duringSeptember but increased again with the coming of October. The yearly variationsof the K WL ′ values showed that it had no correlation to populatio density during1987-1989.