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Dose Power Estimation for Fish in the Lower Reaches of the Ob River

  • AQUATIC TOXICOLOGY
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Abstract

The power of radiation exposure to 90Sr and 137Cs on fish in the lower reaches of the Ob River has been assessed. We use the long-term results of radioecological monitoring of the Ob-Irtysh river system for the period of 2004–2017. The data from laboratory analyses of studies on the radionuclides content in water, bottom sediments, and ichthyofauna of the lower Ob River within the boundaries of the Khanty-Mansi (2004–2010) and Yamalo-Nenets autonomous okrugs (2014–2017), etc., are included. The ERICA Tool 1.3.1.49 (Tier 2) software is used to calculate the radiation power of exposure. The rates of total radiation power of exposure to 90Sr and 137Cs are calculated for all species of the studied fish. We also calculated the power of internal and external radiation exposure, both to 90Sr and 137Cs in seven fish species in the Khanty-Mansi Autonomous Okrug and eight species in the Yamalo-Nenets Autonomous Okrug. The calculations are carried out taking into account the body length and weight of the studied fish. The power exposure to radiation for all species of studied fish does not exceed the ICRP-recommended levels of the conservative ecologically safe radiation level. The power of exposure to radiation due to the internal irradiation in all species of fish is higher than that determined by the external irradiation. The main contribution to the formation of the radiation exposure power for all the fish studied is determined by 90Sr accumulated in the fish organisms. A comparison is made of the radiation dose power for fish from the downstream Ob River and fish in the Techa River near the Mayak Production Association, in the Romashka and Tom rivers, near the Siberian Chemical Combine, in the Yenisei River near the Mining and Chemical Combine, in the Beloyarsk Reservoir near the Beloyarsk NPP, and in the Neman River.

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Funding

This study was funded by the state budget.

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Correspondence to V. G. Gorodetsky.

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Conflict of interest. The authors declare that they have no conflicts of interest.

Statement on the welfare of animals. This article does not contain any studies involving animals or human participants performed by any of the authors.

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Translated by D. Pavlov

Abbreviations: PA, production association; KhMAO, Khanty-Mansi Autonomous Okrug; YaNAO, Yamalo-Nenets Autonomous Okrug.

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Gorodetsky, V.G., Trapeznikov, A.V., Trapeznikova, V.N. et al. Dose Power Estimation for Fish in the Lower Reaches of the Ob River. Inland Water Biol 15, 324–330 (2022). https://doi.org/10.1134/S1995082922030051

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