黑线仓鼠4种肥满度指标的比较研究

A comparison of the four relative fatness indexs =of the Striped hamster ( Cricetulus barabensis )

采用数理统计方法，比较分析了黑线仓鼠（Ｃｒｉｃｅｔｕｌｕｓｂａｒａｂｅｎｓｉｓ）传统的肥满度、百倍胴体重与体长３次方之比、体重与体长之比和胴体重与体长之比４种肥满度指标的年龄、性别、季节、年度变化．结果发现，在描述鼠体的体质状况时，后两者较前两者更有意义，胴体重与体长之比在４种指标中最具生态学意义．结果还表明，在１９８４至１９８９年间的种群密度下。

The age characteristics,sexual differencs,monthly changes and yearly variations of the four relative fatness indexes in Striped hamster ( Cricetulus barabensis ) have been analysed statistically. The four relative fatness indexes of each animal was calculated by the following formulas: K=100W/L 3,K′=100W′/L 3,K WL =W/L and K WL ′=W′/L where K stands for the relative fatness, K′ for the weight (excluding viscera) length coefficint, K WL for weight/length index, K WL ′ for the weight(excluding viscera)/length index, W the weight of the body, W′ weight of the body excluding viscera, L the length of head and body.When the body conditions of Striped hamster were being described,the relative fatness K WL and K WL ′ were shown better than the relative fatness K and K′ ,but the best index was K WL ′ .The yearly variations of the four indexes were not correlated to the population density during 1984～1989.