Important nutrients of Perinereis aibuhitensis collected from cultured and in wild of Fujian sea areas were analyzed.The results indicated that both two sources of P.aibuhitensis have high contents of crude protein (CP>60%,dry)and amino acids (TAA∶54.27% ~56.80%).The essential amino acid patterns (EAA/TAA≈37%,EAA/NEAA≥0.58)are in good agreement with FAO/WHO protein models.And the proportion of flavor a-mino acids (FAA/TAA≈45%)is also high.The content of crude fat is 9.9%~12.5% and the fatty acids are rich in n-3 PUFA.The tissues of P.aibuhitensis contain abundance of essential elements,such as Fe,Mn,Zn,I, Se and etc.However,the contents of harmful element(Pb,Hg,Cd and As)are much lower than that of other a-quatic animals.The analysis shows that the fresh P.aibuhitensis contains 1.68 to 2.42 mg/kg nereistoxin(NTX) and it cannot be detected while cooking or drying over 80℃.Therefore,either wild or cultured Perinereis aibuhiten-sis is a safety and valuable sea food with rich n-3 PUFA and essential elements and high protein of better nutritious value.%本文对福建近海天然与养殖的双齿围沙蚕（Perinereis aibuhitensis）进行基本成分、氨基酸、脂肪酸、矿物元素以及沙蚕毒素进行测定．结果表明，不论是天然或是养殖的，双齿围沙蚕均富含粗蛋白质（＞60％，干基）和氨基酸（TAA∶54.27％～56.80％）；必需氨基酸（EAA／TAA约37％， EAA／NEAA≥0.58）基本符合联合国粮农组织（FAO）、世界卫生组织（WHO）推荐的理想蛋白模式；呈味氨基酸所占的比例（FAA／TAA约45％）也较高．其油脂含量为9.9％～12.5％，且脂肪酸中富含n-3 PUFAs．双齿围沙蚕体所含的必需矿物元素种类齐全，Fe、Zn、I、Se等含量丰富；而有毒元素（Pb、Hg、Cd 、总As与无机砷）的含量却较其它海洋水产动物低．沙蚕毒素的分析结果表明，新鲜的双齿围沙蚕均含有沙蚕毒素（1.68～2.42 mg／kg），而经80℃以上烘干或煮熟后的N TX为未检出．因此，不论是天然的还是养殖的双齿围沙蚕均属于高蛋白质，且富含n-3 PU-FAs和微量必需．
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