黄海中南部小黄鱼当年幼鱼生长特征的研究

The growth characteristics of small yellow croaker Larimichthys polyactis(Bleeker,1987)underyearling in the central and southern Yellow Sea

对2008年7～12月黄海中南部(120°12′～122°E,32°30′～35°N)小黄鱼当年幼鱼的生长特征进行了研究。结果表明,7～12月,小黄鱼当年幼鱼的体长月均增加13.22±5.65mm,体重月均增加4.34±0.65g,体长与体重的关系式为W=3.76×10-5L2.8303,幂指数b接近于3,生长接近匀速。通过研究耳石的长度、重量与体长、体重的关系,发现耳石的长度和重量与体长、体重关系密切,在3种回归方式(Liner,Power,Quadratic)中,乘幂函数的相关性最好。采用7种生长方程对小黄鱼当年幼鱼的生长进行拟合,从决定系数R2及残差平方和RSS的数值来看,VBGF(vonBertalanffy生长方程),LGF(Logistic生长方程),GGF(Gompertz生长方程)3种数学模型的拟合度较为接近,而Logarithmic,Inverse,Quadratic以及Cubic4种生长方程的拟合度较为接近且拟合效果明显好于VBGF,LGF,GGF。7种拟合模型中,Cubic生长方程对小黄鱼当年幼鱼生长的拟合度最高。

According to the biological data of small yellow croaker Larimichthys polyactis（Bleeker,1987）collected by the trawls in the central and southern Yellow Sea in the late of 2008,the growth characteristics of this fish were studied.The results showed that the body length and body weight increased 15.22±5.65 mm and 5.46±0.65 g every month from July to December.The relationship between the body length and body weight was W=3.76×10-5L2.830 3.The relationship between the otolith and body length and body weight was discussed.The Power function was the fittest one among the three models.Growth models VBGF（von Bertalanffy function）,LGF（Logistic function）,GGF（Gompertz function）,Logarithmic function,Inverse function,Quadratic function and Cubic function were chosen as the candidates for fitting the growth model of small yellow croaker underyearling to establish the optimum growth equation of body length.Based on the R2 and RSS criterion,the VBGF,LGF and GGF had the similar fitness,while the Logarithmic,Inverse,Quadratic and Cubic had the similar fitness,and the effect was better than VBGF,LGF and GGF.The Cubic function was the best one to describe the growth of small yellow croaker underyearling.