Comparative analysis of muscle nutrient composition bewteen in-pond raceway and usual-pond system cultured Liza haematocheila

We analyzed the basic nutrinet composition, amino acids and fatty acid contents, texture characteristics and off-flavor compounds of muscle of Liza haematocheila cultured in in-pond raceway system (IPRS) and usual-pond system (UPS). Results show that the crude lipid content in IPRS was significantly lower than that in UPS, but the crude ash content increased significantly (P<0.05). The lysine and valine contents as well as the ratio of essential amino acids/non-essential amino acids were higher in IPRS than those in UPS (P<0.05). The total saturated fatty acid content of fish dorsal muscle in IPRS was significantly lower than that in UPS (P<0.05), but the total content of poly-unsaturated fatty acid content was significantly higher (P<0.05). The texture characteristics were all higher in IPRS than those in UPS (P<0.05). The geosmin concentration in muscle was detected in UPS, but the geosmin and 2-methylisobomeol were not observed in IPRS. The results indicate that in-pond raceway system has positive effects on improving muscle nutritional quality of L. haematocheila.