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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->2012 Vol.31 No.5

Age and Growth of Hemiculterella sauvagei from the Chishui River in the Upper Reaches of the Yangtze River
Author of the article:WANG Jun1,2,3, WANG Mei-rong1,2,3, DAN Sheng-guo1,2, CAO Wen-xuan1,2, LIU Huan-zhang1,2*
Author's Workplace:(1. Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; 2. The Key Laboratory of Aquatic Biodiversity and Conservation, Chinese Academy of Sciences, Wuhan 430072, China; 3. Graduate University of Chinese Academy of Science, Beijing 100049, China)
Key Words:Hemiculterella sauvagei; age; growth
Abstract:

Age and growth of Hemiculterella sauvagei were determined using 371 samples collected from the middle reaches of Chishui river, one of the first-order tributaries of the Yangtze River, China, from July to December 2011. The results showed that the fish scale is an appropriate material for age determination. The standard length of the samples mainly ranged from 80~120 mm, accounting for 86.8% of the total; total weight mostly ranged from 5~25 g, making up 96.2% of the total. Four age groups were identified; individuals of 2~3 years old were dominated, representing 87.6% of the total catch. The relationship between standard length and scale radius showed no significant difference between males and females, which could be expressed as: L=39.522R+25.403the relationship between standard length and total weight also showed no significant difference between males and females, which could be expressed as: W=10-5L2.872. The growth of H. sauvagei was in a constant speed which can be described with von Bertanlanffy equation: Lt=176.1[1-e-0.275(t+1.13)]; Wt=59.54[1-e-0.275(t+1.13)]2.872. The growth inflexion point of total weight was at age 2.706, with the corresponding standard length of 114.78 mm and total weight of 17.41 g. In order to better protect the resource of H. sauvageimeasures such as strict ban to unreasonable catching and to restrict the size of fishing net should be enhanced.

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