The effect of modified atmosphere packaging on the fillet quality of rainbow trout (Oncorhynchus mykiss) during refrigerated storage

Document Type : Research Paper

Authors

1 MSc. Graduate in Fish Product Processing, Department of Fisheries, Faculty of Natural Resources, University of Zabol, Zabol, Iran.

2 Associate Professor, Department of Fisheries, Faculty of Natural Resources, University of Zabol, Zabol, Iran.

3 Associate professor, Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran.

Abstract

Due to the potentiality and rapid spoilage of edible aquatic, many technologies have been developed to increase their shelflife. In this research, the effect of modified atmosphere (40% carbon dioxide and  60% nitrogen), vacuum and air atmosphere packaging on the physical, chemical and microbiological changes of Oncorhynchus mykiss fillet during refrigerated storage (4°C) were studied. Chemical (total volatile base nitrogen (TVB-N) and thiobarbituric acid (TBA)), physical (pH, drip loss and colorimetry) and microbial parameters (total bacterial count (TVC) and psychrotrophic count (PTC)) were measured at 0, 3, 6, 9, 12, 15 and 18 days. The results showed that the fillets packed with modified atmosphere maintained the quality and pysical properties of fillets for 15 days. While the quality and pysical properties of control samples strongly decreased (P<0.05) after 6 days. The growth of microbil load of samples packed in modified atmosphere was slower than the two type of other packaging (P<0.05). Results showed the quality of samples packed in modified atmosphere is better than vacuum and air packaging at the end of storage.

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Journal of Fisheries
Volume 70, Issue 3
February 2018
Pages 262-273

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