两种群东方田鼠生长发育及繁殖性能观测  

Characterization of Growth and Reproductive Performance in Microtus Fortis

作　　者：柏熊 林金杏 王晓东 冯洁 高捷 谢建云 BAI Xiong1, LIN jin-xing2, WANG Xiao-dong1,2, FENG Jie2, GAO Jie1, XIE Jian-yun2(1. Shanghai SIPPR-BK Laboratory Animal Limited Company, Shanghai 201203, China; 2. Shanghai Laboratory Animal Research Center, Shanghai 201203, Chin)

机构地区：[1]上海西普尔-必凯实验动物有限公司,上海201203 [2]上海实验动物研究中心,上海201203

出　　处：《实验动物与比较医学》2018年第2期135-140,共6页Laboratory Animal and Comparative Medicine

基　　金：国家科技支撑计划项目(2015BAI09B04)

摘　　要：目的测定和比较东方田鼠洞庭湖种群(DTH)(长江亚种)和青铜峡种群(QTX)(指名亚种)的繁殖及生长特性。方法东方田鼠雌雄1:1长期同居法饲养繁殖,观察两种群东方田鼠的窝产仔数、胎间隔、初生体质量、离乳体质量等繁殖指标。两种群田鼠雌雄各选30只,测定不同时间点的体质量,并用VonBertalanffy模型方程拟合其生长曲线。结果 DTH窝产仔数(4.70±1.15)只,胎间隔(30.78±10.21)d,出生体质量(4.09±0.13)g,离乳体质量(27.31±1.10)g;QTX窝产仔数(3.58±1.00)只,胎间隔(35.60±12.48)d,初生体质量(4.37±0.09)g,离乳体质量(28.22±0.46)g。从生长曲线可见,两种群东方田鼠的体质量性二型分化分别出现在14 d和28 d,雄性田鼠的体质量显著高于雌鼠。拟合结果显示,两种群田鼠雌性体质量生长曲线体质量拐点出现时间比雄性鼠早。结论 DTH田鼠繁殖能力较QTX高,两个种群田鼠雌雄鼠的体质量均有明显的性二型分化特征,雌体较雄体早熟。Objective To characterize and to compare the growth and reproductive performance of Microtusfortis of Donglinghu stock （M. f. calamorum） and Qingtongxia stock （M. f. fortis）. Methods Females and males of each stock, aged about 10 weeks, were long-term monogamously mated, the reproductive characters were analyzed. Body weight of 60 Microtusfortis （30 females and 30 males） of each stock were measured from born to 98 days of age, and the growth curves were fitted by 3 nonlinear growth models. Results For Microtusfortis of dongtinghu stock, average litter size was 4.70±1.15, litter interval was （30.78± 10.21） d, weight at birth and weaning was （4.09 ± 0.13） g and （27.31± 1.10） g respectively. For Microtusfortis of qingtongxia stock, average litter size was 3.58 ± 1.00, litter interval was （35.60±12.48） d, weight at birth and weaning was （4.37±0.09） g and （28.22±0.46） g respectively. Growth curve showed that the sexual dimorphism of Dongtinghu Microtusfortis and Qingtongxia Microtusfortis occurred at 14 d and 28 d respectively. The fitting results showed that the females had earlier time of inflection than that of males. Conclusion The reproductive capacity of Microtusfortis in Dongtinghu stock is higher than that of Qingtongxia stock. The body weight of male and female has significant dimorphic in both stocks. Femals reached sexual maturity earlier than males.

关 键 词：东方田鼠洞庭湖种群(DTH) 东方田鼠青铜峡种群(QTX) 生长曲线 繁殖性能 Von Bertalanffy模型方程 

分 类 号：Q95-33[生物学—动物学]