摘要
本文利用主分量分析对大仓鼠的体重、胴体重、体长、尾长、体全长、颅全长、颅基长、眶间宽、晶体干重和上臼齿的磨损程度等10项指标进行了一维排序,结果表明:胴体重是大仓鼠最有代表性的年龄指标;在简易可行的指标中,雄鼠以体重、雌鼠以体长代表性最好。但雌鼠的体长和体重的代表性差别很小,故可将体重作为雌雄大仓鼠的年龄组划分指标;大仓鼠的晶体干重轻,称量误差对年龄鉴定影响大,不易用作大仓鼠的年龄鉴定指标。
The authors make an assessment to 10 age indices of greater long-tailed hamster (Cricetulus triton) by use of principal component analysis. All analyzed indices are ordinated on the first principal component axis whose contribution rates are 62.22% to male correlation matrix and 58.82% to female one.The result shows:
1. Body weight excluding viscera is the most presentable age indicator of greater long-tailed hamster.
2. Among the practical ones including body weight,body length, tail length and full body length, body weight is the best age indicator for male and body length for female. Because the projection of body weight is just little smaller than that of body length in female, the authors suggest that body weight may be used as age indicator of both male and female in rough division of age groups.
3. Dry weight of the eye lenses is not a suitable age indicator for greater long-tailed hamster because the eye lens is so light that the difference between two age gro-ups adjacent to each other can not be refected on a balance wohse sensitivity is more than 0.1mg.
出处
《兽类学报》
CAS
CSCD
北大核心
1990年第2期121-127,共7页
Acta Theriologica Sinica
