中文摘要：

采用养殖实验和生化分析方法，在相似的池塘条件下将辽河、黄河和长江种群中华绒螯蟹（Eriocheir sinensis）扣蟹养殖至成蟹，比较了三群体雄体成蟹的性腺指数、肝胰腺指数、出肉率、总可食率和肥满度，进一步测定和比较了可食组织中的常规生化成分、脂肪酸及氨基酸，旨在评价三种群雄体成蟹的营养品质和可食率。研究结果显示：（1）黄河种群中华绒螯蟹的性腺指数略高于其他两种群蟹，长江种群中华绒螯蟹的肝胰腺指数、出肉率、总可食率和肥满度最高，但均无显著差异（P〉0．05）。（2）辽河种群性腺中蛋白质含量显著高于其他两种群（P〈0．05），三群体性腺中水分、脂肪和灰分含量差异不显著（P〉0．05）；长江种群肝胰腺的水分含量最低，但其蛋白质、脂肪和灰分含量高于其他两种群；黄河种群肌肉中脂肪含量显著低于辽河种群的含量，而其灰分含量显著高于黄河种群（P〈0．05），水分和蛋白质含量无显著差异（P〉0．05）。（3）--种群性腺中主要多不饱和脂肪酸（PUFA）含量相近，长江种群性腺中∑PUFA、∑n6PUFA和总高度不饱和脂肪酸（∑HUFA）含量最高；三种群肝胰腺中各PUFA、∑PUFA和∑HUFA含量无显著差异（P〉0．05）；三种群肌肉中C18：3n3（LNA）和C20：5n3（EPA）的含量存在显著差异，且黄河种群的这两种脂肪酸含量都显著高于辽河种群（P〈0．05）。（4）辽河种群性腺中的蛋氨酸和半胱氨酸含量显著高于其他两种群（P〈0．05），且辽河种群的总必需氨基酸（EAA）、总非必需氨基酸（NEAA）和总氨基酸（TAA）含量高于黄河和长江种群；长江种群雄体肌肉中的EAA、总EAA、总NEAA、TAA含量最高。（5）辽河种群性腺中存在3种限制性氨基酸（赖氨酸、缬氨酸和色氨酸），且其平均必需氨基酸分（EAAS）最低；三种群肌肉中均?

英文摘要：

The Chinese mitten crab, Eriocheir sinensis, is one of the most important aquaculture species in China, with a commercial yield of 729 900 tons in 2013. The main culture areas are located in three main drainage basins,i.e., the Liaohe River, the Huanghe River, and the Yangtze River. The Yangtze delta is the largest culture area among the three drainage basins. Although pond-reared populations of E. sinensis originated from their native habitats, i.e., the Liaohe River, Yellow River and Yangtze River, the Yangtze River population generally has the largest body size of adult crabs, the best growth performance, and superior taste among the three populations. To date, however, it is unclear whether there are any differences in gonadal development and nutritional composition of adult male E. sinensis among the three populations when they are cultured under similar pond conditions. In this study, we analyzed the gonadosomatic index （GSI）, hepatosomatic index （HSI）, meat yield （MY）, total edible yield （TEY）, and relative fatness （RF） of pond-cultured male E. sinensis, comparing the Yangtze River, Yellow River, and Liaohe River populations. Then, the proximate composition, fatty acids and amino acids composition, and essential amino acid score were compared among the three edible parts （gonad, hepatopancreas, and muscle）. The results showed that the GSI was slightly higher in the Yellow River population than in the other populations, while the Yangtze River population had higher HSI, MY, TEY, and RF than those of the other two populations. However, there were no significant differences in these indicators among the three populations. The protein content in the gonad was significantly higher in the Liaohe River population than in the other two populations （P〈0.05）, but moisture, lipid, and ash contents did not differ significantly among the three populations. The hepatopancreas of the Yangtze population had the lowest moisture content, but had higher protein, lipid, and ash contents than thos