Establishment of Kinetic Models Based on Electrical Conductivity and Global Stability Index for Predicting the Quality of Allogynogenetic Crucian Carps (C arassius auratus gibelio ) during Chilling Storage

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The changes in sensory assessment (SA), total aerobic counts (TAC), total volatile basic nitrogen (TVB-N), K value and electrical conductivity (EC) of allogynogenetic crucian carps (Carassius auratus gibelio) during chilling storage were determined. To evaluate the multiquality of allogynogenetic crucian carps, a Global Stability Index (GSI) method was developed with SA, TAC, TVB-N and K value. Then, predictive models of GSI and EC were established in combination with zero-order kinetics and Arrhenius equation. The results showed goodness of fit (R2 > 0.97). The activation energies (EA) of GSI and EC models were 79.078 kJ/mol and 80.595 kJ/mol, while the corresponding preexponential constants (k0) were 7.238 × 1013 and 2.466 × 1016, respectively. Relative errors between observed and predictive values of GSI and EC were within ±7% (12 days of storage) and ±0.6% (15 days of storage), respectively. Consequently, kinetic models based on GSI and EC can forecast the quality of allogynogenetic crucian carps during chilling storage. Practical Applications The allogynogenetic crucian carp is one of the crucian carp species with superiority in both production and genetic stability and is usually perishable during storage. Low temperature storage is a primary method to maintain fish freshness. It is meaningful to research the cold chain and try to predict the freshness of allogynogenetic crucian carps rapidly. Kinetic model is usually used in food quality prediction. Global Stability Index (GSI) is an index that can check the quality of food comprehensively, while electrical conductivity (EC) is widely used in determining meat and fish quality rapidly and economically. This work is to establish kinetic models based on GSI and EC to forecast allogynogenetic crucian carps' freshness and compare between EC and GSI to tick out which one is more suitable to predict the freshness of allogynogenetic crucian carps in cold chain circulations.