Freezing characteristics of tropical fishes III spotted seer (scomberomorus guttatus)

Abstract

Skin-on fillets of spotted seer were frozen individually with different prefreezing ice storage periods, and srored at -23°C and -10°C . The frozen storage shelflife was evaluated, with respect to holding time in ice prior to freezing, by examining the extent of oxidative rancidity, protein denaturation, organoleptic changes etc . Fillets with pre-freezing ice storage periods of 0, 3, 5 and 7 days had frozen storage shelf-life of 32, 24, 20 and 16 weeks respectively at -23°C . The fillets stored in ice for more than 7 days is unsuitable for further processing . Storage temperature greatly affected keeping quality of frozen fillets . Freshly frozen fillets stored at -10°C became unpalatable at 16-20 weeks as compared to 28-32 weeks for the fillets stored at -23°C.