Quality enhancement in refrigerated tiger tooth croaker (Otolithes ruber) fillets using chitosan coating containing green tea extract

Document Type: Research Paper


1 1 Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran.

2 Associate professor, Department of Veterinary Medicine, Faculty of Agriculture, Kermanshah Branch, Islamic Azad University, Iran.

3 Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran.

4 Associate professor, Research Center for Environmental Determinants of Health (RCEDH), Kermanshah University of medical Sciences, Kermanshah, Iran.


The effect of chitosan coating combined with green tea extract (GTE) on the quality of tigertooth croaker (Otolithes ruber) fillets including chemical, microbiological, texture, color and sensory properties during 16 days of refrigerated storage was investigated. The changes of color different were significantly retared, and the texture parameteres and sensory scores were significantly improved in tigertooth croaker coated by chitosan, GTE and chitosan combined with GTE, compared with the control. The coincidental lowered rate of increase total volatile base (TVB) content, thiobarbitoric acid (TBA), peroxide value (POV) and free fatty acid (FFA) were obtained in tigertooth croaker coated chitosan+GTE. Chitosan in combination with chitosan had higher inhibition on microbial groeth and yielded the tigertooth croaker with higher likeness, comapared with the other treatments. Therefore, fish coated with chtoas+GTE had the lowest losses in quality during refrigerated storage.