网箱养殖大黄鱼生长特性的研究

Study on growth characters of cultured Pseudosciaena crocea originated from Eastern Fujian

对宁德地区网箱养殖大黄鱼（Pseudosciaena crocea）生长特性进行了研究。测定了780尾大黄鱼25个月龄的各项生长数据,体长变幅为20.5~320.0 mm,体质量变动范围为0.281~555.5 g;生长指标显示,体长生长指标为0.208~2.123,体质量生长指标为0.529~47.579;肥满度波动范围为1.74%~2.37%;肝指数变动范围为0.92%~2.07%;鳔生长指数为1.08%~1.85%;雌鱼性腺成熟系数为0~10.04%,而雄鱼则为0~2.27%。以Keys氏公式W=aLb,拟合25月龄养殖大黄鱼的体长（L）与体质量（W）的关系式为：W=0.0195 L 2.9775（R2=0.9959）,其中b≈3,即此生长阶段的网箱养殖大黄鱼生长均匀,为等速生长类型;体质量生长呈幂函数生长,其回归方程为：y=1.8617x1.8099（R2=0.9931）。体长Y（cm）与养殖时间X（月龄）的生长呈二次多项式关系,其回归方程为：y=？0.0259x2＋1.7125x＋4.1534（R2=0.989）。

The growth parameters for Pseudosciaena crocea of Eastern Fujian stock were measured in 780 individuals in 25 months.Range of the body length or body weight was 20.5-320.0mm or 0.281-555.5g,respectively.The varations of growth indexes for length,weight and fatness in 25 months were 0.208~2.123,0.529~47.579,and 1.74%~2.37%,respectively.Moreover,we found that the index of liver varied from 0.92% to 2.07%,swim bladder weight 1.08% to 1.85%,and gonadosomatic 0 to 10.04%（male： 0~2.27%,female： 0~10.04%）.Besides,on the aspect of growth type,we collected the 25 months data and fitted the length and weight by Keys equation（W=aLb）.The equation [W=0.0195 L 2.9775（R2=0.9959）,b≈3] showed the growth of length fit to the constant speed type.The growth of weight of individuals was power type [y =1.8617x1.8099（R2=0.9931）].Regression equation of quadratic polynomial [y= ？0.0259x2＋1.7125x＋ 4.1534（R2=0.989）] was the relationship between the length（Y） and month（X）.This study provided fundamental growth data of the cage culture P.crocea for healthy breeding and sustainable development.