title: Accumulation and elimination of chromium by freshwater species exposed to spiked sediments.
abstract: 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.
authors.affiliation: Instituto Nacional de Limnología-INALI (CONICET-UNL), José Maciá 1933, 3016, Santo Tomé, Santa Fe, Argentina. mmarchese@datamarkets.com.ar
authors.forename: Mercedes
authors.initials: M
authors.lastname: Marchese
authors.forename: Ana M
authors.initials: AM
authors.lastname: Gagneten
authors.forename: María J
authors.initials: MJ
authors.lastname: Parma
authors.forename: Paola J
authors.initials: PJ
authors.lastname: Pavé
mesh_terms: D000818:Animals; D003530:Cyprinidae / Q000378:metabolism; D033364:Decapoda / Q000187:drug effects / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D017753:Ecosystem; D005618:Fresh Water; D019015:Geologic Sediments; D019684:Magnoliopsida / Q000187:drug effects / Q000378:metabolism; D009835:Oligochaeta / Q000187:drug effects / Q000378:metabolism; D011192:Potassium Dichromate / Q000493:pharmacokinetics*; D014874:Water Pollutants, Chemical / Q000493:pharmacokinetics*
chemical_list: D014874:Water Pollutants, Chemical; D011192:Potassium Dichromate