【摘要】 测定浙江省金华地区 7种鼠科啮齿动物的总消化道及各消化器官的长度和重量 ,与其食性和生境作比较 ,旨在检测近缘种之间消化道长度和重量的差异 ,家栖种类与野栖种类消化道形态的差异。野外捕获动物带回实验室处死 ,解剖分离消化道为胃、小肠、盲肠和大肠 ,精密直尺测定各器官的平展长度 ,纵剖肠道 ,生理盐水冲净内容物 ,65℃恒温干燥后称得干重。研究结果表明 ,消化道长度的种间差异明显大于消化道重量的种间差异 ;盲肠和大肠长度的种间差异明显大于小肠长度的种间差异 ;植食性野栖种类的胃、盲肠和大肠大于杂食性家栖种类 ,而两类动物小肠长度的差异不明显更多还原

【Abstract】 During 1995-1999, length and weight of digestive tract were determined for seven species of rodents (Muridae) from Jinhua, Zhejiang, Eastern China We carried out this study to quantify (1) the difference on length and weight of digestive tract among the species belong to same family or genus; (2) the difference on length and weight of digestive tract between rodents inhabited the forest and ones inhabited the town and countryside Rodents captured from field were dissected and the digestive tract of each animal was separated into stomach, small intestine, caecum, and larger intestine At first, we measured the unstretched length of each digestive organ using a ruler (± 1 mm ), then opened the organs and washed away the content inside the organs with physiological saline solution, at last, the organ tissue were oven dried at 65 ℃ to constant mass and weighed (±0 1 mg) In family Muridae, there were significant interspecific difference on length and weight of digestive tract The variation on digestive tract was related to the diet of the rodents Interspecific variation on length of digestive tract was significant larger than that on weight of digestive tract, suggesting length of digestive tract separated the diet type of the rodents better than weight of digestive tract Interspecific variation on length of caecum and large intestine was significant larger than that on length of small intestine, suggesting length of caecum and large intestine separated diet type better than length of small intestine Moreover, rodents inhabited the forest, mainly feed on plants, had larger stomach, caecum and large intestine than did granivorous ones inhabited the town and countryside Small intestine length, however, did not differ significantly between the rodents from the two habitats mentioned above更多还原