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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
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Your Position :Home->Past Journals Catalog->2014 Vol.33 No.6

Comparative Studies on the Alimentary Tract of Three Herbivorous Rodents in Alpine Meadow
Author of the article:ZHANG Shoudong1,3, YANG Chuanhua2, LIN Gonghua1, ZHANG Tongzuo1*, SU Jianping1*
Author's Workplace:(1. Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China; 2. Modern Agricultural Technical School of Huzhou, Huzhou, Zhejiang Province 313023, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China)
Key Words:alpine meadow; herbivorous mammals; organ index; alimentary tract; discrepancy; evolutionary adaptation
Abstract:Different animals use different adapting strategies of various alimentary tracts to deal with the same or similar environmental stress. In order to understand these strategies, we compared the alimentary tracts’ lengths and the digestive organ indices of three herbivorous mammals in alpine meadow, including plateau pika (Ochotona curzniae), plateau zokor (Myospalax baileyi) and root voles (Microtus oeconomus). The results showed that the root voles had the highest stomach index; while the small intestine index, large intestine index and cecum index of plateau pika were the highest, and those of root voles were the lowest; and the relative lenghs of the alimentary tract of root voles were the longest, and those of plateau zokor were the shortest. However, the propotion of large intestine and cecum lengths to the total digestive tract length of root voles were the highest; while the small intestine’s was the lowest. It suggested that different animal’s alimentary tract may be related to food, energy needs, and metabolic demands and so on. Therefore, various alimentary tracts were the evolutionary adaptations of different species to confronting the environment.
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