Biochemical Composition of Cultured Lateolabrax japonicus at Different Age

The contents of moisture, protein, lipid, amino acids and fatty acids of the muscles of one year old (average weight 1.22 g), two year old (average weight 265 g) and three year old (average weight 1 094 g) cultured Lateolabrax japonicus were measured. The results showed that the contents of moisture, protein and lipid were 76.39%～77.51%, 17.68%～18.12% and 3.56%～4.03% respectively. The total amino acids of one year old, two year old and three year old Lateolabrax japonicus account for 76.62%, 75.11% and 73.78% of dry weight respectively (average 75.17%), and the essential amino acids account for 40.10%, 39.02% and 36.69% respectively (average 38.60%). The content of fatty acids in 1g wet muscles of one year old, two year old and three year old Lateolabrax japonicus were 22.10 mg, 20.65 mg and 13.42 mg respectively (average 18.72 mg), the contents of polyunsaturated fatty acids (PUFA) were 10.19 mg, 7.57 mg and 2.54 mg,with average of 6.77 mg.