Analysis of Muscle Fatty Acids in Eight Species of Threadfin Bream (Nemipteridae) in the South China Sea
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Abstract:
Eight species of threadfin bream (Nemipterus furcosus, Nemipterus japonicus, Nemipterus nematopus, Nemipterus virgatus, Pentapodus setosus, Scolopsis monogramma, Scolopsis taeniata and Scolopsis vosmeri) sourced from the South China Sea were collected from the market of Zhanjiang, Guangdong province of China. The contents of moisture and crude 1ipid in the tissue were measured by Soxhlet extraction method according to national standard method. Nineteen fatty acid components in muscle samples of threadfin bream were determined by capillary gas chromatography. The content of saturated fatty acid (SFA), monounsaturated fatty acid (MUFA) and polyunsaturated fatty acid (PUFA) were analyzed and compared respectively. The results showed that the moisture of Threadfin Bream body ranged from 65.32% to 73.46% and crude lipid accounted for 2.19%~2.92% of the dry weight. The contents of muscle saturated fatty acids, monounsaturated fatty acids, crude fatty acids and polyunsaturated fatty acids in eight species of Threadfin Bream were 34.61%~46.79%, 7.22%~23.96%, 2.19%~2.92% and 28.66%~55.51%, respectively. Among the polyunsaturated fatty acids of eight species of threadfin bream, the percentage of ω-6 and ω-3 fatty acids were 6.62%~14.22% and 19.38%~43.71%, respectively. The ratios of ω-6 vs ω-3 were from 2.1 to 4.1, which indicated threadfin breams had higher nutritional value. Nemipterus virgatus and Nemipterus nematopus had high contents of EPA + DHA (39.27% and 33.51%, respectively), showing high development and utilization value.
