The contents of artificial and natural radionuclides in tissues of the Percidae fish from the Dnipro Reservoir

Abstract

The contents of artificial and natural radionuclides of 137Cs, 90Sr, 226Ra, 232Th, and 40K had been investigated in muscle and bone tissues, gill petals, and scales of common perch Perca fluviatilis and pikeperch Sander lucioperca from two fishing areas of the Dnipro (Zaporizhzhia) Reservoir. The specific radionuclide activities were measured with the SEG-001 “AKP-C” and SEB-01-150 scintillation spectrometers of gamma- and beta-radiation energy in Bq/kg of wet weight. The radioactive elements of both natural and artificial origins were concentrated greatly in common perch tissues compared to pikeperch. The bone and muscle tissues contained the maximal levels of radionuclides, while respectively smaller amounts of radionuclides were found in gills and scales. The radionuclide levels in the tissues of investigated fish species were significantly higher in the Dnipro Reservoir area with weak flowage and slow water exchange.

Early sex detection and physiological stimulation of spawning in the Mozambique tilapia Oreochromis mossambicus (Peters, 1852)

“…The shallow water of the cooling pond is satisfactory space for spawning and natural reproduction of certain species of fish, but anthropogenic environmental pollution causes changes in the physiological processes of different groups of living organisms. The most severe changes are observed under the influence of organic compounds, heavy metals and radionuclides (Martynov & Brygadyrenko, 2017;Kozak & Brygadyrenko, 2018;Lieshchova et al, 2018Lieshchova et al, , 2019Marenkov, 2018b;Fedonenko et al, 2018Fedonenko et al, , 2019Ananieva & Shapovalenko, 2019).…”