新疆阜康水库东方欧鳊生长特征研究

    The growth characteristics of Abramis brama orientalis Berg in Fukang reservoir,Xinjiang

    • 摘要: 为了解新疆阜康水库东方欧鳊(Abramis brama orientalis Berg)的种群状况,促进其资源的合理开发,本文对2021年5月采集的45尾东方欧鳊样本的年龄组成和生长特征进行了研究。结果表明:东方欧鳊年龄组成为1+~4+龄,属于匀速生长类型,回归方程为W =0.020 8SL3.001 7;以退算体长拟合Von Bertalanffy生长方程,体长生长参数:生长系数为0.180、极限体长为43.066 8 cm、理论生长起点年龄为-0.179 5龄,体质量生长参数:生长系数为0.180、极限体质量为1 672.056 2 g、理论生长起点年龄为-0.197 4龄;生长特征指数为5.811,拐点年龄为5.9龄。当种群生物量最大时,东方欧鳊年龄在4.4龄,因此建议其4龄起捕。

       

      Abstract: To evaluate the current status of Abramis brama orientalis Berg population in Fukang reservoir,Xinjiang Uygur Autonomous Region,and promote reasonable exploiting resources, based on 45 specimens collected in May 2021, the age composition and growth characteristics of A.brama orientalis Berg were studied. The results showed that the age composition of the captured A.brama orientalis Berg was 1+~4+ years old. Growth of A.brama orientalis Berg takes on a constant speed style. The relationship between body length and body mass relationship could be described by the following equations: W=0.020 8SL3.001 7. Growth could be described by Von Bertalanffy equation with the growth parameters. Body length growth parameters: SL=43.066 8 cm,k =0.180,t0 =-0.179 5 years old. Body mass growth parameters: W =1 672.056 2 g,k =0.180,t0 =-0.197 4 years old, φ= 5.811. The inflexion point of age for body mass growth and the corresponding body length and body mass was at 5.9 years old. The age of maximum biomass of the population was at t=4.4 years old. It was suggested that catchable age was 4 years old.

       

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