网箱养殖唇鱼骨的生长性能与生长模型

Growth Performance and Models of Hemibarbus labeo Cultured in Net Cages

研究网箱养殖1、2、3龄唇鱼骨的生长性能,并结合唇鱼骨生长数据,应用Logistic、Gompertz和von Bertalanffy生长模型拟合其生长曲线。结果表明:1、2、3龄唇鱼骨的特定生长率随年龄的增长而逐渐下降,1龄鱼特定生长率最高,为4.56%/d,其次为2龄鱼,为2.05%/d,3龄鱼最低,为0.93%/d;随年龄的增长,唇鱼骨的肥满度也逐渐增加,1、2和3龄鱼肥满度依次为0.015、0.016、0.018 g/cm3;1和2龄鱼饵料系数相近,分别为1.44和1.31,均低于3龄鱼饵料系数1.88;不同月龄唇鱼骨的体质量和体长均随月龄的增加而呈指数函数增长。3种生长方程拟合结果表明,von Bertalanffy生长模型的拟合度最高,可较好表达网箱养殖唇鱼骨的生长过程及变化规律。

The growth performance of 1 to 3-year-old Hemibarbus labeo cultured in net cages was evaluated and the fish growth curves were studied by using three nonlinear regression models： Logistic, Gompertz and von Bertalanffy models in the paper. The results showed that the special growth rates（SGR） and the age of fish were negatively correlated, and the highest SGR was found in 1 year-old fish, followed by 2 and 3 year-old fish, and the SGR were 4.56%/d, 2.05%/d and 0.93%/d, respectively. The relative fatness and fish age were positively correlated. The relative fatness of 1 to 3 year-old fish were 0.015, 0.016 and 0.018 g/cm3, respectively. The feed coefficients of 1 year-old（1.44） and 2 year-old fish（1.31） were similar, which were lower than that of 3 year-old fish（1.88）. The body weight and the standard length were positively correlated with the month age. The relationships among body weight, standard length and month of age was power function. The results of curve fitting analysis indicated that von Bertalanffy model was the most precise model to fit the body weight and standard length in Hemibarbus labeo cultured in net cages.