title: A laboratory study of the copper and nickel uptake and regulation in a copper-tolerant decapod, Cambarus bartoni (Fabricius) (Decapoda, Crustacea).
abstract: Tissue copper concentration in whole Cambarus bartoni, exposed for four weeks to 0.125, 0.25 and 0.5 mg Cu/litre and 0.2, 0.4 and 0.8 mg Ni/litre in the laboratory at 18 degrees C, showed a linear relationship with exposure time at 0.25 and 0.5 mg Cu/litre; the regression slope at 0.5 mg Cu/litre (r2 = 0.218; 0.001 less than P less than or equal to 0.05) was approximately two times higher than that at 0.25 mg Cu/litre (r2 = 0.148; 0.025 less than P less than or equal to 0.05). Regression analysis of nickel concentrations in whole crayfish as a function of exposure time showed a third degree polynomial relationship at 0.4 (y = 49.989 + 14.77x - 15.395x2 + 3.194x3) and 0.8 (y = 52.053 + 37.05x - 28.933x2 + 5.133x3) mg Ni/litre, as well as in the control (y = 49.126 + 27.253x - 23.468x2 + 4.168x3) (y = Ni concentration; x = exposure time in weeks), suggesting the occurrence of a Ni flux every 4 weeks.
authors: Department of Biology, Laurentian University, Sudbury, Ontario, Canada.
authors: S
authors: S
authors: Zia
authors: M A
authors: MA
authors: Alikhan
mesh_terms: D000818:Animals; D003400:Astacoidea / Q000378:metabolism*; D003300:Copper / Q000378:metabolism* / Q000493:pharmacokinetics / Q000494:pharmacology; D009532:Nickel / Q000378:metabolism* / Q000493:pharmacokinetics; D014018:Tissue Distribution
chemical_list: D003300:Copper; D009532:Nickel