以三种规格[一级蟹（120±5.00 g）、二级蟹（100±5.00 g）、三级蟹（80±5.00 g）] 雌性中华绒螯蟹为对象，通过索氏抽提法和气相色谱法对不同囤养阶段中华绒螯蟹体肉脂含量和脂肪酸组成进行分析。结果表明：三种规格中华绒螯蟹囤养阶段体肉脂含量与对照组比较，呈下降趋势。在囤养阶段，三级蟹体肉脂含量呈下降趋势；二级蟹脂含量先下降后上升，第3阶段达最大；一级蟹脂含量先下降后上升，第2阶段达最大。三种规格中华绒螯蟹囤养第4阶段检测出的脂肪酸种类最低（二、三级蟹（14~22种）；一级蟹（10~23种））。饱和脂肪酸（SFA）中主要是棕榈酸（C16:0）和硬脂酸（C18:0）；单不饱和脂肪酸（MUFA）中含量最高的是油酸（C18:1），其次是棕榈油酸（C16:1）；多不饱和脂肪酸（PUFA）中C18:2ω6、C20:5ω3 (EPA)和C22:6ω3 (DHA)三种脂肪酸含量占主要地位。以FAO/WHO推荐的ω3/ω6比例和EPA+DHA值作为评价指标，三种规格的中华绒螯蟹囤养到第二阶段体肉最适合食用，且一级蟹对人体健康更有利。以油酸的含量作为营养品质评价指标，囤养第2阶段的中华绒螯蟹体肉具有较好的营养品质。

Three sizes of female Eriocheir sinensis were studied [ first-grade crab (120±5.00 g), second-grade crab (100±5.00 g), and third-grade crab (80±5.00 g) ]. The body meat lipid content and fatty acid composition of Eriocheir sinensis in different hoarding stages were studied by Soxhlet extraction method and gas chromatography. The results showed that the body meat lipid content of the three sizes of Chinese mitten crabs in the hoarding stages was lower than that of the control group. In the maintenance stage, the lipid content of body meat in the third-grade crab decreased; the second-grade crab lipid content decreased first and then increased, and reached the maximum in the third stage; the crab lipid content in the first-stage decreased first and then rose, and is the biggest in the second stage. The three sizes of Chinese mitten crabs were the lowest in the fourth stage (the second and third-grade crabs (14~22 species); the first-grade crabs (10~23 species)). The saturated fatty acids (SFA) were mainly palmitic acid (C16:0) and stearic acid (C18:0); the highest content of monounsaturated fatty acids (MUFA) was oleic acid (C18:1), followed by palmitoleicacid (C16:1); the fatty acid content of C18:2ω6, C20:5ω3 (EPA) and C22:6ω3 (DHA) in polyunsaturated fatty acids (PUFA) was dominant. The ω3/ω6 ratio recommended by FAO/WHO and EPA+DHA value are used as evaluation indexes. The three sizes of Chinese mitten crabs body meat are most suitable for consumption in the second stage, and the first-grade crab is more beneficial to human health. Taking the content of oleic acid as the nutritional quality evaluation index, the Chinese mitten crab in the second stage has good nutritional quality.

上海市现代农业产业技术体系（沪农科产字（2017）第4号）