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Information × Registration Number 0225U004579, (0125U003279) , R & D reports Title Assessment of the Impact of radiocontamination on perch and roach genomes based on sensitive genetic markers popup.stage_title Виконання гідрохімічних, радіометричних та дозіметричних досліджень Head Hudkov Dmytro I., Доктор біологічних наук Registration Date 12-12-2025 Organization Institute of Hydrobiology of the National Academy of Sciences of Ukraine popup.description1 Assessment of the impact of prolonged radiation exposure on the occurrence of dose-dependent genome modifications in populations of perch and roach and their comparison with fish from reference reservoirs popup.description2 An autumn field trip was conducted to the test water bodies located within territory of the Chernobyl Exclusion Zone, as well as outside it – to reference reservoirs with a low background level of radionuclide contamination. Field and laboratory hydrochemical and hydrophysical studies of the quality of the aquatic environment. In total, about 120 samples of aquatic environment components were collected for radiochemical and spectrometric determination of radionuclide activity concentration. About 200 fish tissue samples were also collected for further analysis in the Laboratory of Ecological Genetics of the Institute of Biology of the University of Latvia. The activity concentration of the main dose-forming radionuclides was determined. The volumetric activity of 90Sr dissolved in water in the studied floodplain water bodies of the Exclusion Zone was within 0.7–81 Bq/l, and 137Cs – 0.3–3.2 Bq/l with the highest values in Lake Glyboke and the lowest – in Yanivskyi Backwater. The average activity concentration of 90Sr in fish of floodplain reservoirs of the Exclusion Zone during the research period was recorded in the range of 0.2–19 kBq/kg, and 137Cs – 0.3–5.1 Bq/kg. The highest values of activity concentration of radionuclides were noted in fish of Lake Glyboke, and the lowest – in the southwestern part of the former water area of the Chernobyl NPP cooling pond. Absorbed dose rate due to internal sources of radiation was for roach and perch of Lake Glyboke – 305 and 270, four remaining parts of the Chernobyl NPP cooling pond – 4.7-20.1 and 8.5-17,7, Yanivskyi Backwater – 28.2 and 18.7, the Pripyat River – about 0.9 and 0.7 μGy/day. The morphometric analysis of fish showed that common roach in the reservoirs of the Chernobyl Exclusion Zone was distinguished by a heterogeneous growth rate and the presence of stunted individuals in the herd. In the most contaminated studied lakes, a significant predominance of female roach in the spawning herd (1.0 to 5.5) was noted. Product Description popup.authors Dmytro I. Hudkov Belyayev Volodymyr V. Pryshliak Serhii P. Menkovska Mariia O. Iryna Marushchak popup.nrat_date 2025-12-12 Close