In order to analyze and evaluate the nutritional values in muscle of Plagiognathops microlepis, the proximate composition, amino acid profile, fatty acid composition in muscle of P.microlepis were measured by conventional analytical methods.The results showed that the contents of moisture, crude protein, crude lipid and ash in muscle of P.microlepis were 79.31%, 16.56%, 0.94% and 1.13%, respectively.Total 18 kinds of amino acids including 8 essential amino acids(EAA)and 10 nonessential amino acids (NEAA)were found in muscle of P.microlepis, and the contents of total a-mino acids (TAA), EAA and NEAA were 16.28%, 6.72% and 9.56%, respectively.EAA/TAA and EAA/NEAA were 41.29% and 70.32%, respectively, both more than the standards recommended by the Food and Agriculture Organ-ization of the United Nations and World Health Organization (FAO/WHO).According to amino acid score (AAS)and chemical score (CS), the first limiting amino acid both were tryptophan, but the second limiting amino acid were threo-nine for AAS and pheny1alanine+tyrosine for CS.Twenty one fatty acids were detected in muscle of P.microlepis, inclu-ding 7 saturated fatty acids (SFA), 3 monounsaturated fatty acids (MUFA)and 11 polyunsaturated fatty acids (PUFA). The amounts of SFA, MUFA, PUFA, EPA and DHA were 25.22%, 22.02%, 37.76%, 11.87% and 11.55% of the total fatty acids, respectively.In conclusion,P.microlepis is an edible fish with high nutritional value.%本试验对察尔森水库细鳞斜颌鲴(Plagiognathops microlepis)肌肉营养成分进行了分析及评价.试验采用常规营养成分分析法对细鳞斜颌鲴肌肉一般营养成分、氨基酸组成、脂肪酸组成进行了测定.结果表明:细鳞斜颌鲴肌肉中水分含量为79.31%、粗蛋白含量为16.56%、粗脂肪含量为0.94%、灰分含量为1.13%、总糖含量为0.38%.细鳞斜颌鲴肌肉共检出18种氨基酸,其中必需氨基酸(EAA)8种,非必需氨基酸(NEAA)10种,总氨基酸(TAA)含量为16.28%, EAA含量为6.72%, NEAA含量为9.56%; EAA/TAA(41.29%)及EAA/NEAA (70.32%)均在FAO/WHO推荐值以上.氨基酸评分(AAS)和化学评分(CS)结果是第一限制性氨基酸均为色氨酸(Trp),而第二限制性氨基酸,AAS是苏氨酸(Thr), CS是苯丙氨酸+酪氨酸(Phe+Tyr).细鳞斜颌鲴肌肉共检出21种脂肪酸,其中7种饱和脂肪酸(SFA)、3种单不饱和脂肪酸(MUFA)、11种多不饱和脂肪酸(PUFA),分别占脂肪酸总量的25.22%、22.02%、37.76%; C20:5n3(EPA)含量为11.87%, C22:6n3(DHA)含量为11.55%.从营养分析结果来看,细鳞斜颌鲴是一种营养价值极高的食用鱼类.
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