| 王也,张文杰,任娅茹,张小倩,苏永志,贾举杰,宛新荣,陈卫.2014.浑善达克沙地三趾跳鼠体重与年龄划分.动物学杂志,49(6):798-803. |
| 浑善达克沙地三趾跳鼠体重与年龄划分 |
| The study on the Weight and Age of Dipus sagitta in Hunshangdake Sandy Land |
| 投稿时间：2014-04-10 修订日期：2014-09-11 |
| DOI：DOI: 10.13859/j.cjz.201406002 |
| 中文关键词: 三趾跳鼠 年龄鉴定 胴体重 体重 |
| 英文关键词:Dipus sagitta Age determination Body weight without viscera Weight |
| 基金项目:中国科学院战略生物资源科技支撑体系运行专项(野生)动物实验平台运行补助经费项目；公益性行业(农业)科研专项经费项目(No.201203041)； |
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| 中文摘要: |
| 哺乳动物的年龄划分始终是动物种群生态学研究的基础内容之一，同时鼠类年龄划分方法在害鼠的预测和控制实践中具有十分重要的意义。国内外对于三趾跳鼠的生态、疫病、进化等方面进行过一些研究，但有关该鼠种年龄鉴定的研究和鼠类年龄组划分与鼠种的实际年龄对应的研究尚属空白。2002年到2003年间，我们在内蒙古锡林郭勒盟浑善达克沙地，采用常规夹线方法对三趾跳鼠(Dipus sagitta)的种群年龄进行调查，对每只捕获的三趾跳鼠样本进行了体长、体重、胴体重、繁殖特征进行记录，利用胴体重为标准，参考样本出现的时间（月份）及繁殖特征，将三趾跳鼠划分年龄组。结果表明，捕获到的三趾跳鼠可划分为3个自然年龄组，1龄组（胴体重≤71 g），2龄组（71<胴体重≤90 g），3龄组及以上（胴体重>90 g），三趾跳鼠最大年龄至少3龄。鉴定三趾跳鼠年龄运用胴体重法相对简便准确。 |
| 英文摘要: |
| The mammalian age determination is one of the basic aspects in the study of animal population ecology, while the method of rodent age determination has great significance in the prediction and control of rodents in practice. Although ecology, disease, evolution of Northern Three-toed Jerboa (Dipus sagitta) have been investigated in great detail, few studies have focused on its age determination.125 samples of Dipus sagitta (43 females and 82 males) in Hunshandake Sandy Land in Inner Mongolia from 2002 to 2003, were used to make age estimation according to carcass weight as a major indicator. We recorded Dipus sagitta samples of each capture the body length, body weight, carcass weight, propagation characteristics. The data on male and female individual carcass weight were analyzed by using t-test. Results show that the difference of male and female Dipus sagitta weight is not obvious (P>0.05) (Table 1). Using body weight without viscera as the standard, according to characteristics of the frequency distribution and the appearing time (month) (Figure 1), the Dipus sagitta can be divided into 3 natural age groups: group I (0-1 years old): body weight without viscera≤71g; group II (1-2 years old): 7190g. By inter-group differences t-test, adjacent difference between the two groups was significant (P<0.01)(Table 2). And as population age growth, the carcass weight increased, indicating that this division standard for the identification of Dipus sagitta age, with statistical significance. According to carcass weight as the division standard for each age group body weight, the data of body length are shown in table 3. Dipus sagitta in group I and II have a rapid growth in body length and body weight, while in group II and III, the body length growth rate decreased obviously. The method of identification Dipus sagitta age by carcass weight is relatively simple and accurate. |
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