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Accumulation and Elimination of Cadmium by the Nile Tilapia (Oreochromis niloticus) in differing Temperatures and Responses of Oxidative Stress Biomarkers

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Abstract

The aims of this study were to investigate the accumulation (15 days) and elimination (15 and 30 days) of cadmium (Cd) in the liver, gill, kidney and muscle of Oreochromis niloticus following exposures to different concentrations (1 and 2 mg/L) of Cd at different water temperatures (20, 25, 30 oC). Additionally, responses of oxidative stress biomarkers (superoxide dismutase, SOD; catalase CAT; glutathione peroxidase, GPx and malondialdehyde, MDA) of the liver were determined following Cd exposures. In accumulation period, Cd levels increased significantly in all the tissues at all temperatures and tissue accumulation order was kidney > liver > gill. All tissues, except the muscle, accumulated Cd in relation to exposure concentrations and water temperatures. There was no measurable level of Cd accumulation in the muscle, except in fish exposed to 2 mg Cd/L at 30 oC. Likewise, elimination of Cd from the tissues also increased in depends on periods and water temperatures. The order of Cd elimination from the tissues was gill > liver > kidney. The oxidative stress biomarkers also responded to both Cd exposure and temperature increases. The activities of antioxidant enzymes such as SOD, CAT, GPx and MDA levels in the liver increased in relation to increases in Cd concentrations and water temperatures.

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Acknowledgements

This work was supported by Mersin University, Scientific Research Projects Coordination Unit (Project Number: 2017-2-TP2-2555).

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Correspondence to Fahri Karayakar.

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The authors declare that they have no conflict of interest.

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The ethics committee approval was obtained from Mersin University Animal Experiments Local Ethical Committee by decision number 2017/06 dated 27/03/2017.

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Karayakar, F., Yurt, Ö., Cicik, B. et al. Accumulation and Elimination of Cadmium by the Nile Tilapia (Oreochromis niloticus) in differing Temperatures and Responses of Oxidative Stress Biomarkers. Bull Environ Contam Toxicol 109, 1126–1134 (2022). https://doi.org/10.1007/s00128-022-03616-1

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  • DOI: https://doi.org/10.1007/s00128-022-03616-1

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