A kinetic model for the relative contribution of waterborne and dietary cadmium and zinc in the common carp (Cyprinus carpio)

Environmental Toxicology and Chemistry
Karen Van CampenhoutRonny Blust

Abstract

In this work, the uptake and whole-body accumulation of Cd and Zn by the common carp from water, diet, and a combination of both was studied using the radioactive tracers 09Cd and 65Zn. A three-compartment pharmacokinetic model was constructed and revealed metal- and exposure route-dependent accumulation profiles. Under the tested exposure conditions in water (0.1 microM Cd and 1 microM Zn), only 0.1 and 0.07%, respectively, of the total Cd and Zn load that passed the branchial surfaces was accumulated by the carp. In contrast, the carp accumulated 20 and 29% of the total ingested Cd and Zn load (mean concentrations in food of newly accumulated metals were 2.24 +/- 0.29 and 19.91 +/- 2.89 nmol/g wet weight, respectively). However, the contribution of the waterborne metals to the whole-body metal accumulation was higher than the metal uptake from food. The constructed model was used to simulate the effect of variable assimilation efficiency (AE) values on the relative importance of dietary Cd and Zn exposure to the overall metal accumulation in common carp. This simulation was performed under a realistic exposure scenario and with Cd and Zn AE values ranging from 5 to 95%. Dissolved Zn levels were higher and Cd levels lower comp...Continue Reading

Citations

Dec 20, 2011·Ecotoxicology and Environmental Safety·Lisa D KraemerPeter J Dillon
Jul 28, 2015·Environmental Science & Technology·Xun Wang, Wen-Xiong Wang
Jun 22, 2016·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·T N LoewenW G Anderson
May 19, 2017·Environmental Science & Technology·Xun WangWen-Xiong Wang
Dec 28, 2019·Environmental Toxicology and Chemistry·William AdamsDoug Spry
Jan 22, 2015·Environmental Science & Technology·Nicole SpannWalter Traunspurger

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