Changes in the quality indices during ice storage of farmed Senegalese sole (Solea senegalensis).

摘要

Farmed Senegalese sole (Solea senegalensis) from 2 cultivation areas in Spain and reared under different conditions were analysed for up to 28 days in order to establish changes in quality indices during ice storage and to select the best indices to be used to calibrate a prototype designed for rapid measurement of freshness in this species. The main indices measured were degradation of adenosine-5'-triphosphate and breakdown products, K-value, Torrymeter readings, trimethylamine oxide N (TMAO-N), TMA-N, TBA index and dielectric measurements. The main differences observed were related to size, amount of TMAO-N, pH and fat content, which may be related to differences in rearing conditions. The most consistent index to measure changes in freshness was the K-value, which showed a linear response with time during the shelf-life period, irrespective of the differences in size and composition of the fish in both batches. However, the dielectric response of the fish varied in the 2 batches in the pulse amplitude. It is suggested that more work is needed in order to adjust the prototype for predicting days in ice for this species.