STUDY ON THE PREDICTIVE MODELS OF THE QUALITY OF SILVER CARP (HYPOPHTHALMICHTHYS MOLITRIX) FILLETS STORED UNDER VARIABLE TEMPERATURE CONDITIONS

Predictive models about the quality changes of silver carp (Hypophthalmichthys molitrix) fillets stored under variable temperatures were investigated. Electrical conductivity (EC), total aerobic count (TAC), total volatile base nitrogen (TVB-N) and sensory score of silver carp fillets stored at 270, 273, 276, 282 and 288 K were determined. Different reaction orders (zero, first and second) were tested; EC, TAC and TVB-N followed a first-order reaction equation; and sensory score followed a zero-order reaction equation based on the total coefficient of determination (Sigma R-2). The effect of temperature and storage time on the quality of silver carp fillets was modeled by using Arrhenius equation. All the relative errors of validation experiments for EC, TAC and sensory score varied by <13% and for TVB-N varied by <13% within 12 days. Therefore, the models can predict the quality of silver carp fillets effectively within 270-288 K.