| 摘要: |
| 应用电感耦合等离子质谱仪分析技术分别研究了江苏太湖和洪泽湖水域大银鱼体内12 种元素的生物积累特征。结果表明, 两水域大银鱼体内元素含量的总体范围为: 钙(Ca) 9443—22150、钠(Na) 1107—2418、镁(Mg) 876.8—1231、钾(K) 4662—9472、锌(Zn) 74—135.8、锰(Mn) 6.80—21.08、硒(Se) 2.082—6.261、铜(Cu) 0.489—2.704、铁(Fe) 未检出—24.19、钴(Co) 未检出—4.684、砷(As)0.123—0.587 mg/kg 干重; 镉(Cd)未检出; 必需元素丰富。太湖水域大银鱼中的Na、K、Cu、As、Se的含量显著地高于洪泽湖水域大银鱼。而后者体内Ca、Mg、Zn 的含量显著地高于前者。主成分分析显示出两水域鱼体多元素生物积累的整体“指纹”地理差异非常明显。在此基础上推导出了通过元素“指纹”来区分两地大银鱼个体的判别函数, 正确率达100%。两水域大银鱼中毒性元素As 和Cd 的含量都远低于国家相应的限量标准。
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| 关键词: 大银鱼, 元素, 主成分分析, 判别分析, 太湖, 洪泽湖 |
| DOI：10.11693/hyhz200902015015 |
| 分类号: |
| 基金项目:中央级公益性科研院所基本科研业务费专项资金项目, 6-115043 号 |
附件 |
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| BIOACCUMULATION OF ELEMENTS IN ICEFISH PROTOSALANX HYALOCRANIUS FROM THE TAIHU LAKE AND HONGZE LAKE |
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YANG Jian1, XU Xun2, LIU Hong-Bo1
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1.Key Laboratory of Ecological Environment and Resources of Inland Fisheries, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences;2.College of Fisheries, Nanjing Agriculture University
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| Abstract: |
| Icefish Protosalanx hyalocranius is an important commercial fish in freshwater lakes of China. Research on bioaccumulation of mineral and trace elements in this fish is however very limited. Bioaccumulation of 12 elements in 19 P. hyalocranius individuals from the Taihu and Hongze Lake in Jiangsu Province, China are studied with ICP-MS (inductively coupled plasma mass spectroscopy). Results show that the concentration ranges of elements in the fish collected from the two lakes are: calcium (Ca), 9443—22150; sodium (Na), 1107—2418; magnesium (Mg), 876.8—1231; potassium (K), 4662—9472; zinc (Zn), 74—135.8; manganese (Mn), 6.80—21.08; selenium (Se), 2.082—6.261; copper (Cu), 0.489—2.704; arsenic (As), 0.123—0.587; iron (Fe), non-detectable (n.d.)—24.19; cobalt (Co), n.d.—4.684mg/kg dry weight; and cadmium (Cd), n.d. Except for Fe, P. hyalocranius seems to be rich in essential elements generally, especially Ca, Mg, and Zn. The concentrations of Na, K, Cu, As, and Se in the Taihu Lake fish samples are significantly higher than those in the Hongze Lake, while the Ca, Mg and Zn concentrations are significantly higher in the latter. Principal component analysis reveals clear geographic differentiation in holistic elemental accumulation patterns in samples of the two lakes. A linear discriminate analysis function has been established based on the element concentration patterns to discriminate them between the two lakes and the discrimination rate reached 100%. In addition, As, Cd, Cu and Se residuals are well below the levels of the national standards for foods (NY5073-2001 and GB2762-2005). Therefore, the fish shall be safe for human consumption.
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| Key words: Icefish Protosalanx hyalocranius, Element, Principal Component Analysis, Discriminated Analysis, The Taihu Lake, The Hongze Lake |
