STUDY ON CORRELATION ANALYSIS AND GROWTH MODEL IN NILE TILAPIA OREOCHROMIS NILOTICUS

In order to study the regular pattern of growth and development in Nile tilapia Oreochromis niloticus,we used the Pearson correlation analysis and three nonlinear models which were Logistic,Gompertz and Bertallanffy to structure the growth model of Nile tilapia.The result showed that the correlation coefficient of Nile tilapia between every morphological traits and body weight had reached a significant level(P0.01),total length,body length and body height had a high correlation with body weight,but the correlation with caudal peduncle length was not obvious.This study structured three growth models of Nile tilapia which were Logistic,Gompertz and Bertallanffy,respectively.The result showed that this three models could simulate the growth curve well,the goodness of fit(R2) using the three models were higher than 0.983,and the Logistic model(R2 =0.991) is highest.Therefore,it is feasible that using these three models to simulate the growth curve of Nile tilapia.This result could increase efficiency of Nile tilapia selective breeding.