Chemical monitoring of three water-supply reservoirs, using fish as bioindicators
2001
Rehulka, J. (Jihoceska Univ., Opava (Czech Republic). Oddeleni Vodni Toxikologie a Nemoci Ryb)
Biological indication of exposure of the aquatic environment to inorganic and organic pollutants was tested in the Kruzberk, Sance and Moravka water-supply reservoirs in the basin of the Oder (Czech Republic) from 1996 to 1998. Muscles of 90 fishes of 14 species served as the indication matrix. Mercury was the most dangerous pollutant of the spectrum of 8 metals studied. In all the reservoirs, the greatest accumulation of mercury was recorded in Esox lucius (0.985 +/- 0.227 mg/kg), Perca fluviatilis (0.872 +/- 0.255 mg/kg), Anguilla anguilla (0.857 +/- 0.1933 mg/kg) and Stizostedion lucioperca (0.715 +/- 0.2867 mg/kg). The accumulation of polychlorinated biphenyls was the highest in the fish from the Kruzberk reservoir (muscle of Anguilla anguilla: 1.801 mg/kg; muscular fat of Aspius aspius: 17.055 mg/kg). The accumulation of DDT in fish was similar to that of PCBs. The highest concentration of DDT and its metabolites was found in Anguilla anguilla from Kruzberk (from 0.638 to 1.85 mg/kg). The maximum concentrations of hexachlorobenzene were found in two specimens of Anguilla anguilla (0.19 and 0.179 mg/kg in the muscle, 0.606 and 0.831 mg/kg in the muscular fat) from Kruzberk.
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