Comparison of different bacteria growth models on chilled Pseudosciaena crocea

Bacterial changes of fish flesh in cultured Pseudosciaena crocea stored aerobically at 0, 5℃ were mainly analyzed, bacteria growth curves of chilled cultured P.crocea was fitted using modified Logistic and Gompertz equations.Kinetic parameters of bacterial growth and predictive model were developed with nonlinear estimation equations. The results showed that the correlation coefficient of developed models was over 0.99,indicating predictive models make it possible to describe the dynamic changes and predict the bacterial number stored at different time. Difference between predicted values and observed values were compared with root mean squares (RMS) for validating the goodness of predictive models of the bacterial growth. RMS of the Gompertz model were 0.077 and 0.100,and RMS of the Logistic model were 0.114 and 0.138 at 0, 5℃, respectively. Predicted values of the Gompertz were significant compared with the Logistic model.