Marchese Mercedes, Gagneten Ana M, Parma María J, Pavé Paola J
Instituto Nacional de Limnología-INALI (CONICET-UNL), José Maciá 1933, 3016, Santo Tomé, Santa Fe, Argentina.
Arch Environ Contam Toxicol. 2008 Nov;55(4):603-9. doi: 10.1007/s00244-008-9139-0. Epub 2008 Feb 15.
The bioaccumulation and elimination capacity of chromium were examined in four freshwater species: the submersed aquatic plant Ceratophyllum demersum (Ceratophyllaceae), the oligochaete Limnodrilus udekemianus (Tubificidae), the crab Zilchiopsis collastinensis (Decapoda), and the fish Cnesterodon decemmaculatus (Poeciliidae). All of the species were exposed simultaneously to sediments spiked with Cr (K(2)Cr(2)O(7)) at different concentrations for 28 days, followed by 7 days without Cr to evaluate the concentration of residual Cr. We found that Cr accumulated in the tissues of all four species. The highest bioconcentration factor obtained for each species is as follows: C. demersum, 718.66 (+/-272.91); L. udekemianus, 172.55 (+/-80.8), Z. collastinensis, 67.72 (+/-35.4); C. decemmaculatus, 23.11 (+/-12.82), all at 28 days of exposure.
研究了四种淡水生物对铬的生物累积和消除能力，这四种生物分别是沉水水生植物金鱼藻（金鱼藻科）、寡毛纲动物苏氏尾鳃蚓（颤蚓科）、螃蟹科拉斯廷氏齐氏蟹（十足目）和鱼类德氏食蚊鱼（花鳉科）。所有物种同时暴露于添加不同浓度铬（重铬酸钾）的沉积物中28天，随后7天不接触铬，以评估残留铬的浓度。我们发现铬在所有四个物种的组织中都有累积。每个物种在暴露28天时获得的最高生物富集系数如下：金鱼藻，718.66（±272.91）；苏氏尾鳃蚓，172.55（±80.8）；科拉斯廷氏齐氏蟹，67.72（±35.4）；德氏食蚊鱼，23.11（±12.82）。
