东方田鼠头骨和脏器的形态学指标  

Cranium and Internal Organ Morphology Indices of Yangtze Vole (Microtus fortis calamorum)

作　　者：胡忠军[1] 王勇[1] 张美文[1] 郭聪[1] 

机构地区：[1]中国科学院长沙农业现代化研究所

出　　处：《动物学杂志》2002年第4期21-26,共6页Chinese Journal of Zoology

基　　金：国家"九五"科技攻关项目 (No .96 A2 3 0 6 0 4)专题 ;中国科学院知识创新项目 (No .KSCX2 SW 10 3)

摘　　要：对实验室封闭群第 7、8代东方田鼠 (Microtusfortiscalamorum)头骨和脏器的形态学指标进行了测量 ,并探讨了各指标在雌雄间、年龄组间的差异及其与体重的关系。结果表明 ,头骨大小在亚成年雌雄鼠间无显著差异 ,成年雄鼠显著大于成年雌鼠 ;脏器绝对和相对指标雌雄鼠间差异不显著。头骨指标、脏器绝对指标成年鼠显著长于或大于亚成年鼠 ,肝、肾脏、睾丸相对重量以及盲肠、大小肠相对长度在年龄组间差异显著。头骨和脏器指标 (Y)与体重 (X)的关系为Y =aXb,头骨形态指标、脏器绝对重量或长度与体重正相关 ,脏器相对重量或长度除睾丸与体重正相关外其余均与体重负相关。We measured cranium and internal organ morphology indices of the voles from laboratory population of Microtus fortis calamorum. The cranium indices included the greatest length of skull, zygomatic width, skull height, nasal bone length, interorbital breadth, width between maxillary incisor and molar, length of maxillary molar row and head back width, and the internal organ indices comprised weight of heart, lung, liver, spleen, kidney, stomach (without content) and length of caecum and large+small intestine.;There were no significant differences in the three main cranium morphology indices (greatest length of skull, zygomatic width and skull height) between subadult females and males while the three main cranium indices of adult males were significantly larger than those of adult females; and the two sexes of sub-adult and adults displayed no conspicuous variations in terms of absolute and relative indices of internal organs (relative weight of internal organ=internal organ weight/body weight×100; relative length of intestinal tract=intestinal tract length/body length). All cranium morphology indices, all absolute indices of internal organ and relative weight of testis of adult voles were accordingly significantly longer or larger than those of sub-adult ones; on the contrary, relative indices of liver, kidney, caecum and small+large intestine of sub-adult animals were conspicuously larger or longer than those of adult ones; and there were no conspicuous differences in relative weight of heart, lung, spleen and stomach between sub-adult and adult voles. In addition, the regression equation of cranium and internal organ morphology indices (Y) with body weight (X) is Y=aX b; all morphology indices of cranium, all absolute indices of internal organs and relative weight of testis positively correlated with body weight while relative weight of lung, spleen, kidney and stomach, together with relative length of caecum and large+small intestine, negatively correlated with body weight, and relative weight of heart and l

关 键 词：东方田鼠 头骨 脏器 形态学指标 

分 类 号：Q959.837[生物学—动物学] S443[农业科学—农业昆虫与害虫防治]