中华绒螯蟹中微量元素的分布及评估

Distribution and assessment of minerals in mitten crab

研究了中华绒螯蟹中K、Na、Fe、Zn、Cu、Cd、Pb和Cr等微量元素在身体肌肉、螯足肌肉、鳃丝、性腺和肝胰脏中的分布状况,以及雄蟹和雌蟹的差异,并对中华绒螯蟹微量元素的营养价值和重金属污染的情况进行了评价。结果表明,中华绒螯蟹中K、Na含量最高,Fe、Zn、Cu次之,Cd、Pb、Cr最低。同一元素在不同部位的分布有较明显的差异,鳃丝中各种微量元素的含量都较高。多数微量元素的含量在雌雄蟹各部位之间没有明显的差异,但性腺中Cd、Cu、Na、K和Cr的含量有明显的差异,其中Cr在雌蟹和雄蟹肌肉中的含量也有明显的差异。中华绒螯蟹是K、Na、Fe、Zn、Cu等微量元素的良好食品来源,但Pb、Cd污染情况较为严重。

The distribution and difference of K, Na, Fe, Zn, Cu, Cd, Pb and Cr in the anatomical parts（body muscle, pincers and leg food, gill, liver and pancreas） of adult male and female mitten crab were studied. Nutrition of minerals and pollution of heavy metals were evaluated. The results showed that K and Na contents were the highest, and Fe, Zn and Cu were higher than Cd, Pb and Cr. The significant differences for the content of same mineral in different anatomical parts ware found, but all of mineral contents are high in gill. Most mineral contents had no significant difference between the same anatomical parts of adult male and female crab, except for Cd, Cu, Na, K and Cr in gill and Cr in muscle. The mitten crab was found to be very good food source of minerals, but was severely polluted by Pb and CA.