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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->2019 Vol.38 No.1

Analysis on the Feeding Habits of Saurogobio dabryi in Different Reaches of Jialing River
Author of the article:LYU Zhenyu1, ZENG Yu1*, XIONG Xiaoqin1*, LIU Yuying1, ZHANG Chen1, PENG Yan1, TANG Junfeng1, CHENG Lei2, YU Danli3
Author's Workplace:1. Southwest Branch of the National Freshwater Fishery Engineering Technology Research Center, College of Life Science, China West Normal University, Nanchong, Sichuan Province 637009, China;
2. Nanchong Academy of Agricultural Sciences, Nanchong, Sichuan Province 637001, China;
3. Tangjiahe National Nature Reserve Administration Bureau, Guangyuan, Sichuan Province 628109, China
Key Words:Saurogobio dabryi; Jialing River; feeding habits; space variation
Abstract:The samples of stomach content of Saurogobio dabryi were collected at different reaches in Jialing River from October to November of 2015 and 2016, and the food composition was investigated based on the analysis of stomach contents. The results showed that S. dabryi was an omnivorous fish, and 5 broad diet categories (79 small diet categories) were identified. Cluster analysis showed that the occurrence rate (F%), numerical percentage (N%) and percent index of relative importance (IRI%) were consistent in measuring the contribution of each food category to S. dabryi. However, there was a significant difference between the food importance results based on weight percentage (W%) and the top three. Based on the 4 indices determined above, the dominant composition of animal bait in the stomach content of S. dabryi from the upper and midstream indicated that S. dabryi was carnivorous omnivorous in these reaches. By constrast, S. dabryi from the downstream was found to be phytophagous omnivorous according to the dominant composition of algae in the stomach content. Comparison of W% among the S. dabryi from different reaches revealed significant differences between the food composition of the middle reaches with that of the upstream and downstream (d>0.3). The Schoener overlap index showed that the food composition of the fish varied between different reaches (Cxy<0.60). These results indicated that the feeding habits of S. dabryi had strong regionalism and plasticity, and this might provide an explanation for the adaptation of S. dabryi to different aquatic ecological environments.
2019,38(1): 68-76 收稿日期:2018-03-28
分类号:Q959.4
基金项目:国家自然科学基金项目(51779210);四川省教育厅重大培育项目(17CZ0035);四川省科技厅项目(2018KZ0060)
作者简介:吕振宇(1993—),男,硕士研究生,研究方向:鱼类生态学,E-mail:13458237276@163.com
*通信作者:曾燏,E-mail:zengyu@cwnu.edu.cn;熊小琴,E-mail:xiongxiaoqinxxq@163.com
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