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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->2016 Vol.35 No.6

Assessment of Biological Parameters and Stock Biomass of Xenocypris davidi in Junshan Lake
Author of the article:ZHANG Yanping1, ZHANG Haixin1, FU Yilong1, CUI Cui2, LIU Zhifang2, FAN Hongchao2, ZHAO Chunlai1, CHEN Wenjing1*
Author's Workplace:1. Fisheries Research Institute of Jiangxi Province, Nanchang 330000, China;
2. Fisheries Research Institute of Pingxiang, Pingxiang, Jiangxi Province 337000, China
Key Words:Xenocypris davidi; biological parameter; stock; Junshan Lake
Abstract:Xenocypris davidi is a small-size economical freshwater fish. In this study, 746 fishes were obtained from December of 2013 to March of 2014 in Junshan Lake of Jiangxi province, and the body length and mass were measured. Biological parameters, growth characteristics and stock biomass of X. davidi population were assessed by using FiSAT Ⅱ software. The results showed that the body length of X. davidi ranged from 81 mm to 320 mm, with an average length of 197 mm, and the body mass ranged from 16.0 g to 440.0 g, with an average mass of 144.9 g. The relationship between fish length and mass could be expressed as W=0.000 1L2.634 1(R2=0.985, P<0.01, n=746). The growth of X. davidi could be described with Von Bertalanffy equation as Lt=341.25[1-e-0.38(t+0.992 9)], Wt=470.29[1-e-0.38(t+0.992 9)]2.634 1. The age inflection point of X. davidi was 1.96 years, while the body length and body mass of X. davidi were 230 mm and 166.6 g, respectively. The average fullness was 1.71±0.29, the total mortality coefficient was estimated as 1.43, natural mortality coefficient was 0.74 a-1, the fishing mortality coefficient was 0.69 a-1 and the exploitation rate of X. davidi was 0.48 in Junshan Lake. The initial stock of X. davidi was up to 210.45 tons in Junshan Lake.
2016,35(6): 865-870 收稿日期:2016-04-29
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