| 徐兴军,吕建伟,谢振丽,计沈斌,周双涛,王昌河.2008.嫩江下游人工林中黑线姬鼠与黑线仓鼠的消化道形态及其取食策略.动物学杂志,43(6):131-136. |
| 嫩江下游人工林中黑线姬鼠与黑线仓鼠的消化道形态及其取食策略 |
| Digestive Tract Morphology of Apodemus agrarius mantchuricus and Cricetulus barabensis manchuricus in the Plantation of Lower Nenjiang Valley |
| 投稿时间：2008-04-25 修订日期：2008-09-22 |
| DOI： |
| 中文关键词: 同域共存种 食物组成 消化道形态 资源分割 |
| 英文关键词:Co-existed species Food composition Digestive tracts morphology Resources partitioning |
| 基金项目:国家重点基础研究发展规划项目(973)(No.2007CB109106);齐齐哈尔大学青年教师科研启动支持计划项目 |
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| 中文摘要: |
| 对嫩江下游流域人工林区两同域共存优势种黑线姬鼠东北亚种(Apodemus agrarius mantchuricus)与黑线仓鼠三江平原亚种(Cricetulus barabensis manchuricus)夏季主要食物组成及消化道形态结构的适应性变化进行了比较分析。二者均以当年生植物嫩茎、叶、种子及昆虫为主要取食对象,但黑线姬鼠对茎和叶的采食频次小于黑线仓鼠,而种子、根和昆虫类在黑线姬鼠的食物中出现的频次则相对较高。与食物组成相适应,黑线仓鼠的胃、盲肠和大肠在长度及重量上均显著大于黑线姬鼠,这是黑线仓鼠对高纤维和低蛋白食物的适应性调整。研究结果表明,两种啮齿动物在长期的进化中产生了不同的食物资源利用模式,而其消化道形态结构的变化则可能是其在长期的种间竞争和进化压力下进行食物资源分享的一种功能性反应。 |
| 英文摘要: |
| Food composition and tract morphology of Apodemus agrarius mantchuricus and Cricetulus barabensis manchuricus in the plantation of Lower Nenjiang Valley was examined and compared to reveal whether the two species can co-exist through resources partitioning and how the two species adjust their digestive tract morphology to co-survival under the stress of competition and lower temperature.The contents of stomach were checked and sorted as leaves,stems,flowers,roots,seeds and insects to determine the food preferences of each species.The results showed that both of the two species mainly fed on fresh stems,leaves,seeds and insects,but the frequency of stems and leaves in stomachs of C.b.manchuricus was higher than that of A.a.mantchuricus,while the frequency of seeds,roots and insects was on the other hand.Adapted to food composition,both the length and the weight of stomach,caecum and large intestine of C.b.manchuricus were significantly larger than that of A.a.mantchuricus,which was the adaptive variation of C.b.manchuricus to its food resources with higher cellulose and lower quality.There were significant interspecific differences in small intestine,the small intestine length of C.b.manchuricus was shorter while the weight was larger than that of A.a.mantchuricus.These results indicated that the two co-existed rodent species have the different food selection pattern,while the different features of digestive tract morphology are the functional response to the partitioning of food resources. |
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