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Chitosan Extends the Shelf-life of Filleted Tilapia (Oreochromis niloticus) During Refrigerated Storage

P732; Shelf-life extension of aquatic products is of significant economical importance.To determine the potential effect of chitosan on the shelf-life of filleted tilapia,this study analyzed the bacterial community diversity in fresh and spoiled tilapia fillets stored at(4±1)℃ and examined the antim...

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Bibliographic Details
Published in:中国海洋大学学报(英文版) 2012, Vol.11 (3), p.408-412
Main Authors: CAO Rong, LIU Qi, YIN Bangzhong, WU Biao
Format: Article
Language:English
Online Access:Get full text
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Summary:P732; Shelf-life extension of aquatic products is of significant economical importance.To determine the potential effect of chitosan on the shelf-life of filleted tilapia,this study analyzed the bacterial community diversity in fresh and spoiled tilapia fillets stored at(4±1)℃ and examined the antimicrobial activity of chitosan against relevant bacteria isolates.Results showed that Pseudomonas(20%)and Aeromonas(16%)were abundant in fresh tilapia fillets,whereas Pseudomonas(52%),Aeromonas(32%)and Staphylococcus(12%)were dominant in the spoiled samples.Chitosan showed wide-spectrum antibacterial activity against bacteria isolated from tilapia and 5.0 g L-1 chitosan was selected for application in preservation.We further determined the shelf-life of chitosan-treated,filleted tilapia stored at(4±1)℃ based on microbiological,biochemical and sensory analyses.Results showed that the shelf-life of chitosan-treated,filleted tilapia was extended to 12 d,whereas that of untreated,control samples was 6 d.These indicate that chitosan,as a natural preservative,has great application potential in the shelf-life extension oftilapia fillets.
ISSN:1672-5182
DOI:10.1007/sl1802-012-1923-9