Institute of Biophysics, Krasnoyarsk Science Center, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russia.
Siberian Federal University, Krasnoyarsk, Russia.
Dokl Biol Sci. 2022 Oct;506(1):141-144. doi: 10.1134/S0012496622050179. Epub 2022 Oct 27.
This work reports the first data on the content of plutonium (Pu) in the muscle tissues of the Northern pike (Esox lucius) and the Siberian dace (Leiciscus baicalensis) inhabiting the middle reaches of the Yenisey River in the vicinity of the radioactive discharge site. An increase in the content of Pu and radiocaesium (Cs) in pike muscles followed an increase in the volume of controlled discharges of these radionuclides to the Yenisey in 2018. The content of Pu in the muscles of pike (2-11 mBq/kg dry weight) and dace (1-4 mBq/kg dry weight) of the Yenisey fall within the range of values obtained by other authors for the ichthyofauna from water bodies contaminated with radioactive discharges from nuclear power plants and spent nuclear fuel processing plants. The ratio of the activity concentrations Pu/Cs in fish muscles, compared with the similar ratios in other hydrobionts, indicates a significantly lower bioavailability of plutonium for fish. The obtained preliminary results make it possible to consider the Northern pike as a more prospective indicator of biologically available plutonium in the Yenisey than the dace.
本研究报告了栖息在叶尼塞河中游放射性排放物附近的北方梭鲈（Esox lucius）和西伯利亚鱘（Leiciscus baicalensis）肌肉组织中钚（Pu）含量的首批数据。2018 年，叶尼塞河受控排放这些放射性核素的总量增加，导致梭鲈肌肉中 Pu 和放射性铯（Cs）的含量增加。叶尼塞河梭鲈（2-11 mBq/kg 干重）和鱘（1-4 mBq/kg 干重）肌肉中的 Pu 含量处于其他作者获得的来自受核电和乏燃料处理厂放射性排放物污染的水生物种的范围之内。与其他水生生物类似的 Pu/Cs 比值表明，鱼类体内 Pu 的生物可利用性明显较低。初步研究结果表明，与西伯利亚鱘相比，北方梭鲈更适合作为叶尼塞河中生物可利用 Pu 的指标。
