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Quality of Ornate Emperor (Lethrinus ornatus) Packed in a Combination of Dry Ice and Wet Ice and Stored Under RefrigerationDepartment of Fish Processing Technology, Fisheries College and Research Institute Tamilnadu Veterinary and Animal Sciences University, Tuticorin 628 008, India, ttn_jerosh99{at}sancharnet.in
Department of Fish Processing Technology, Fisheries College and Research Institute Tamilnadu Veterinary and Animal Sciences University, Tuticorin 628 008, India
Department of Fish Processing Technology, Fisheries College and Research Institute Tamilnadu Veterinary and Animal Sciences University, Tuticorin 628 008, India
Department of Fish Processing Technology, Fisheries College and Research Institute Tamilnadu Veterinary and Animal Sciences University, Tuticorin 628 008, India
Department of Fish Processing Technology, Fisheries College and Research Institute Tamilnadu Veterinary and Animal Sciences University, Tuticorin 628 008, India
Ornate emperor (Lethrinus ornatus) stored under refrigeration (5 °C) in a combination of dry ice and wet ice at an optimum level of 1 : 0.2 : 0.5 (w/w/w) were found to be sensory acceptable up to 12 days without re-icing. Samples stored in wet ice at 1 : 1 (w/w) were acceptable for only 8 days. Total bacterial load ranged from 104 to 106 cfu/g, while total psychrotrophs increased 6 log cycles. Lactic acid bacteria count increased 3 log cycles and H 2S producers increased 4 log cycles. Micrococcus constituted 79% of the flora in fresh fish. Micrococcus (40%) was also the dominant flora in the combination pack, while Alcaligenes (26%) was dominant in wet ice pack. TVB-N content did not exceed the limit in any of the packs. Free fatty acid and hypoxanthine contents reached to 18.27% as oleic acid and 13.36mg/100g, respectively at the end of storage. Total fat was very low (0.26%), but total protein was high (25.5%) in the raw fish. During storage in the combined ice pack, there was a gradual reduction in the salt soluble proteins from 77.1 to 62.9%. Raw fish contain health beneficial
Key Words: Ornate emperor • Lethrinus ornatus • packaging • dry ice • wet ice • refrigeration • storage • quality
Food Science and Technology International, Vol. 14, No. 1,
21-27 (2008) |
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-3 fatty acids particularly docosahexaenoic acid (DHA) at a level of 7.15% out of total fat. The loss of this essential fatty acid during storage in the combined pack was only 61%, while in the control pack, the loss was high (88%).