Determination of trimethylamine (TMA) content and its relation with Microbial load in Muscle tissue of whole Croaker (Otolithes ruber) during iced storage
Subject Areas : New Technologies in Aquaculture Development
Keywords: ice storage, muscle tissue, Keywords: Microbial load, Trimethylamine, Otolithes rubber,
Abstract :
Abstract In this study (Winter, 2007), the trimethylamine (TMA) content in the muscle tissue of whole croaker(Otolithes ruber) in relation with bacterial load changes (psychrophiles and mesophiles bacteria) was monitored during iced storage for a period of 18 days (0, 3, 6, 9, 12, 15 and 18th day). Results showed that the concentration of TMA and bacterial load (psychrophiles and mesophiles), increased linearly during iced storage. TMA was not detected in the first storage day. The first detection was in the 3rd storage day. In this study, the best correlation was found between TMA and psychrophilic bacterial load (R2=0.91), these bacteria were also found to be the dominant microorganism during storage time. Initial concentration of TMA 1.36mg/100g finally reached 8.97mg/100g, while psychrophilic bacterial load reached more than 108cfu/g. The average TMA concentration (in the 15th day) was found to be more than the acceptable range.
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