典型草原区达乌尔鼠兔年龄划分标准  

The Age Determination of Ochotona dauurica by Carcass Weight and Body Weight in Typical Steppe

作　　者：陈立军[1] 刘伟[1] 苏永志[2] 郑思思[1] 张小倩[2] 宛新荣[1] 

机构地区：[1]中国科学院动物研究所农业虫害鼠害综合治理研究国家重点实验室,北京100101 [2]首都师范大学生命科学学院,北京100048

出　　处：《动物学杂志》2013年第3期345-350,共6页Chinese Journal of Zoology

基　　金：农业虫害鼠害综合治理研究国家重点实验室开放课题(No.IPM1207);中国科学院重要方向项目(No.KSCX2-EW-N-05)

摘　　要：年龄鉴定是研究动物种群生态学的重要基础。作者于2009～2010年间在内蒙古典型草原区采用整洞群夹捕的取样方法捕获了198只达乌尔鼠兔(Ochotona dauurica,116只雌鼠,82只雄鼠)。在对样本进行常规解剖和数据记录后,根据样本的胴体重频次分布特征并参照繁殖特征,对达乌尔鼠兔进行年龄划分。分析结果表明,达乌尔鼠兔胴体重存在显著的性别差异,据此本文按照性别将达乌尔鼠兔划分如下3个年龄组,雌性:幼年组(胴体重≤55 g)、亚成年组(55 g<胴体重<75 g)、成年组(胴体重≥75g);雄鼠:幼年组(胴体重≤55 g)、亚成年组(55 g<胴体重<85 g)、成年组(胴体重≥85 g)。并根据达乌尔鼠兔体重与胴体重之间的相互关系,建立了利用体重鉴定达乌尔鼠兔年龄的依据。本方法可为野外达乌尔鼠兔的年龄划分和种群结构动态研究提供参考依据。The age determination of Daurian Pika （Ochotona dauurica） plays a key role in the study of its population ecology. We analyzed the carcass weight of 198 samples of Daurian Pika （116 female, 82 male）, captured in Abaga Qi, Xilinhot City, Inner Mongolia of China from 2009 to 2010, and found out that the average carcass weight of female and male pikas was significantly different （79. 13 ± 2.37 g vs. 91.76 ± 3.74 g）. Basis on the frequency distribution of each carcass weight, taking the reproductive status as a reference, we divided the female and male pikas into three age groups, juvenile, subadult and adult, respectively. The standard of carcass weight was juvenile （≤55 g）, subadult （55 -75 g）, and adult （≥75 g） for female; juvenile （ ≤55 g） , subadult （55 -85 g） , and adult （≥85 g） for male. The carcass weight between different age groups was significantly different and was also significantly positively correlated with body weight. Thus, the standard of age division by body weight resulted from the present study can be used as a potential tool in analyzing age structure in Daurian Pika population ecology study.

关 键 词：达乌尔鼠兔 年龄鉴定 胴体重 体重 

分 类 号：Q958[生物学—动物学]