Abstract:Nutritional components of Liza haematocheila muscle were determined with conventional methods.The results were analyzed and compared in order to evaluate the nutritional quality of L.haematocheila. The results showed that contents of moisture,crude protein,crude fat,ash,carbohydrates of the fish muscles were 80.90%,17.25%,0.76%,0.83% and 0.26%,respectively.The total percentage of 17 amino acids and 7 essential amino acids were 82.51% and 33.14% in the dried muscle samples,respectively.The percentage of essential amino acids in the total amino acids was 40.18%,and the ratio of essential amino acids and non-essential amino acids was 0.7∶8∶1.Apparently,the two ratios in the muscle of L.haematocheila were in accord with the standard of FAO/WHO (40%,60%).According to amino acids score (AAS) and chemical score (CS),the first limiting amino acid was Methionine+ Cystine and the second limiting amino acid was Valine in the muscle of L.haematocheila,with an essential amino acid indice (EAAI) of 59.63. Twenty four fatty acids were found in the dried muscle samples and the ratio of unsaturated fatty acids and saturated fatty acids was 3∶1; the ratio of ω-6 and ω-3 (6.11∶1) essential fatty acids was reasonable. The content of EPA+DHA was 4.32% in the dried sample,which was higher than some other economic fishes.The composition of trace elements in the muscles of L.haematocheila was reasonable. In general, L.haematocheila is euryhaline fish species with balanced nutrition and relatively high nutritional value,which deserves further exploitation and popularization.
