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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
Sponsored by:Sichuan Society of Zoologists; Chengdu Giant Panda Breeding Research Foundation; Sichuan Association of Wildlife Conservation; Sichuan University
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Your Position :Home->Past Journals Catalog->2014 Vol.33 No.5

Digestion Strategy of Plateau Zokor
Author of the article:ZHANG Shoudong1,3, LIN Gonghua1, YANG Chuanhua2, CUI Xuefeng1,3, QIN Wen1,3, 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:plateau zokor (Myospalax baileyi); digestive tract morphology; digestibility; digestion strategy; evolutionary adaptation
Abstract:Animal lifestyles can vary in different environments by adopting different digestion strategies, and the morphology of digestive tracts may play a key role in such adaptations. In order to investigate the surviving stratagem of plateau zokor (Myospalax baileyi), a typical subterranean rodent species endemic to the Qinghai-Tibet Plateau, the gastrointestinal morphology, food intake, food assimilation and food digestibility of plateau zokor was analyzed compared with laboratory rat (Rattus norvegicus). The results showed that: the amount of food intake and food assimilation of zokors were significantly less than those of rats; food digestibility, protein digestibility and crude fiber digestibility were significantly higher than those of rats; however, no significant differences of protein assimilation and crude fiber assimilation were observed between the two animals. The stomach, small intestine, large intestine and cecum of zokors were significantly heavier (dry weight) than those of rats. The large intestine and cecum of zokors were significantly larger than those of rats while no significant difference was observed between the lengths of small intestine. Overall, our results here confirmed that there was obvious consistency between the morphology of digestive tracts and digestibility. The decreased food intake and increased digestive capacity were the digestion strategies of plateau zokors.
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