Abstract: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.
