SPF级封闭群长爪沙鼠生长发育及繁殖性能研究

Study on Growth and Reproductive Performance of SPF Closed Colony Mongolian Gerbil

目的了解SPF级封闭群长爪沙鼠的生长发育及繁殖性能,进一步完善其生物学特性,为长爪沙鼠标准化研究及相关科研工作提供数据参考。方法从饲养在屏障环境中的SPF级封闭群长爪沙鼠群体中随机挑选44对繁殖性能良好的长爪沙鼠进行配种,记录并统计相关繁殖信息。随机挑选出生后的长爪沙鼠80只(雌雄各半),定期称重并绘制1~77日龄生长曲线。结果长爪沙鼠窝产仔数主要分布在4~9只,占总胎数的84.2%。胎间隔主要分布在24~35 d,占总胎数的72.1%。初产日龄主要分布在82~134 d,占总雌鼠量的77%。离乳率为100%的胎数占总胎数的79%。结论屏障环境中饲养的SPF级封闭群长爪沙鼠繁殖性能良好,母性良好且产后即可交配受孕。长爪沙鼠最适离乳日龄为25日龄。25~42日龄长爪沙鼠体质量增长最快。42~77日龄雄性长爪沙鼠体质量显著大于雌性。

Objective To explore the growth,development and reproductive performance of SPF closed colony Mongolian gerbil,further improve its biological characteristics,and provide data reference for the standardization research and related scientific research of Mongolian gerbil.Method Forty four pairs of Mongolian gerbil with good reproductive performance were randomly selected from the SPF closed colony of Mongolian gerbil raised in a barrier environment for breeding,and the relevant reproductive information was recorded and counted.Eighty Mongolian gerbil(half male and half female)were randomly selected after birth,weighed regularly and drew a 1-77 day growth curve.Result The litter size of Mongolian gerbil was mainly distributed between 4-9,accounting for 84.2%of total number of fetuses.The gestational interval is mainly distributed between 24 and 35 days,accounting for 72.1%of the total number of fetuses.The initial production age is mainly distributed between 82 and 134 days,accounting for 77%of total number of female Mongolian gerbils.The number of fetuses with a 100%weaning rate accounts for 79%of the total number of fetuses.Conclusion The SPF closed colony Mongolian gerbil raised in the barrier environment has good reproductive performance,good maternity and can mate and conceive after delivery.The optimal weaning age of Mongolian gerbil was 25 days.At 25-42 days old,Mongolian gerbil gained the fastest weight.At the age of 42 to 77 days,the weight of males is significantly greater than that of females.