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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->2010 Vol.29 No.4

Analysis of the Growth Function of the Largemouth Bronze Gudgeon Coreius guichenoti in the Upper Reaches of the Yangtze River
Author of the article:ZHOU Can1, 2, ZHU Qian2, LIU Huan-zhang1*
Author's Workplace:(1. Institute of Hydrobiology, the Chinese Academy of Sciences, Wuhan 430072, China; 2. Marine College, Shandong University at Weihai, Weihai, Shandong Province 264209, China)
Key Words:largemouth bronze gudgeon; growth equation; non-linear mixed model; AIC
Abstract:This paper analyzed the growth function of the largemouth bronze gudgeon (Coreius guichenoti Sauvage et Dabry) based on data from a survey conducted in the upper reaches of the Yangtze River from 2005 to 2007. The relationship between scale radius and body length corresponds to the equation L = 85.429S0.8125 (R2 = 0.9635, no significant difference between sexes at 0.01 level). The body length from back-calculation showed an apparent Lee’s phenomenon. The non-linear mixed model method together with AIC was used to provide the best estimate of growth parameters. Back-calculation data was fitted to 36 models based on a group of 4 candidate growth equations, which were von Bertalanffy (VBG), Richards, Gompertz, and Robertson's growth equations. According to the AIC, these growth equations in the sequence of goodness of describing the growth of the largemouth bronze gudgeon are VBG, Richards, Gompertz, and Robertson's growth equation. The best model was the VBG Model 6: Lt=602.9[1-e-0.1693(t+0.024)] (no significant difference between sexes at 0.01 level) with a growth performance index of φ=4.7891±0.01612. Through the analysis, we suggest that it was better to use back-calculation data and the non-linear mixed model combined to describe fish showing apparent Lee’s phenomenon. This paper provided basic information for population dynamics analysis and the protection of largemouth bronze gudgeon resources, and served as an example for growth pattern recognition of different fish species and in different life history stages of the same species.
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