Effect of Deheading and Evisceration on Shelf Life and Spoilage Characteristics of Cololabis saira during Refrigerated Storage

doi:10.7506/spkx1002-6630-201622041

Abstract

Abstract: This study aimed to analyze the effect of deheading and evisceration on shelf life and spoilage characteristic of Cololabis saira during refrigerated storage. Freshness indicators, including sensory scores, total volatile basic nitrogen (TVB-N), thiobarbituric acid-reactive substance (TBARS), total bacteria counts and odor components, were determined. Results showed that sensory scores of both intact and deheaded and eviscerated C. saira declined during storage, with deheaded and eviscerated fish showing more significant decrease than intact fish. The shelf life of C. saira indicated by TVB-N was slightly delayed than that determined by sensory evaluation. The TVB-N value of deheaded and eviscerated fish reached closely to the limit of 30 mg/100 g on day 8 of storage, while the control group reached this limit on day 12. The rate of lipid oxidation was accelerated in the treatment group, but TBARS values of both groups did not surpass the limit of 5.0 mg/kg at the end of shelf life. The initial total viable count (TVC) was significantly higher in the treatment group than in the control group (P < 0.05). The TVC value of the treatment group reached the limit of 7.0 (lg (CFU/g)) on day 8, while the control group surpassed the limit on day 10. Experiment results showed that the shelf-life of whole and deheaded and eviscerated C. saira under refrigerated storage were 10–12 and 8 days, respectively. At the end of the shelf life, there were significant differences in the odor composition detected by electronic nose between the two groups, which indicates that the process of putrefaction may proceed differently.

Key words: Cololabis saira, deheading/evisceration, shelf-life, E-nose, storage quality

CLC Number:

TS254.4

BIAN Ruijiao, CAO Rong,*, LIU Qi, ZHAO Ling, REN Dandan. Effect of Deheading and Evisceration on Shelf Life and Spoilage Characteristics of Cololabis saira during Refrigerated Storage[J]. FOOD SCIENCE, 2016, 37(22): 269-273.

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