洞庭湖区社鼠脏器重量的比较

对洞庭湖区社鼠(Niviventer confucianus)野外自然种群脏器的重量指标进行了测定,并比较了其在年龄组、性别、季节及生境间的差异。结果表明,社鼠内脏(心、肺、肝、脾、肾脏)随着年龄组的增加,重量有明显的增加,其重量与体重有极其显著的相关性。两性间的脏器重量指标没有显著性差异。脏器季节变化的共同特征是夏季脏器重量较低,四季间比较,仅有心脏重量有显著的季节变化。生境间心脏和肾脏重量的变化相对较大,达显著水平。参与繁殖与未参与繁殖的雌鼠相比,心、肺、肝、肾脏的各项指标均较高,脾脏则相反,但均未有显著性差异。总的来看,洞庭湖社鼠种群的脏器指标相对稳定,尽管重量指标随着年龄组而增加,受性别、季节、生境及繁殖行为的影响相对较小。

Comparison of Some Internal Organs of Niviventer confucianus in Dongting Lake Region

We measured internal organ(heart,lung,liver,spleen and kidney) weights of Surphur Bellied Rat Niviventer confucianus caught in Dongting Lake region.The weights of organs had no significant differences between male and female animals.The variance analyses(one-way ANOVA) and curvilinear regression showed that the weight of internal organs was increase with their age.The weight of internals positively correlated with body weight.The weight of internal organs didn't show significant difference between seasons expect for the heart.Among internal organs,the heart and kidney caught in mountainous area were significant heavier than those captured in hilly area.Breeding females had heavier heart,lung,liver and kidney and lighter spleen than un-breeding ones,but the difference is not significant.Overall,the internal organs of Surphur Bellied Rat were stable and not affected by the sex,seasons,habitats and reproductive activity.