【摘要】 目的研究吉林省鼠疫自然疫源地乌尔黄鼠的生态学变化规律。方法依据《吉林省鼠疫自然疫源地现状调查实施方案及工作指南》对吉林省鼠疫自然疫源地达乌尔黄鼠种群的年龄结构、雌雄比和数量变化、雌性繁殖状况进行观察。结果2龄鼠占多数,4龄鼠较少,未发现大龄鼠,种群性比,雄∶雌为1∶0.98。雌鼠妊娠率94.32%,平均胎鼠数为7.67个。结论达乌尔黄鼠生态学各项指标变化差异略微,种数的数量年际动态基本是恒定的。更多还原

【Abstract】 Objective To study ecological change rules of Spermophilus dauricus in plague natural focus of Jilin province.Methods According to the investigation guide of Jilin province plague natural focus situations,age structures,sex proportions and changes of quantity and reproduction conditions of female mice were observed.Results Two-year-old mice occupied majority and four-year-old mice were quite poor and weren’t found older mice.Sex proportions of female and male mice was 1∶0.98.Gestation rate of female mice was 94.32%.Average quantity of foetus mice was 7.67.Conclusion Each index difference of ecology on spermophilus dauricus is very small and quantities of variety is basically constant in changes of each year.更多还原