ORIGINAL RESEARCH
Heavy Metal (Hg, Cd, Zn) Concentrations and
Condition of Eelpout (Zoarces viviparus L.),
around Baltic Sea
H.-R. Voigt
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Department of Environmental Sciences, E-building Vik, P.O.Box 27, FIN 00014 University of Helsinki-Helsingfors,
Finland
Pol. J. Environ. Stud. 2007;16(6):909-917
KEYWORDS
ABSTRACT
In total, 145 adult (<15 cm) eelpouts from various parts of the Baltic Sea were analyzed: Brunskär (Archipelago
Sea) Tvärminne (Finnish Western Gulf of Finland), Bays of Kunda and Muuga (Estonian Gulf
of Finland), Bay of Matsalu (Western Estonian coast), Roja (Latvian Gulf of Riga), Laboe and Schwentine
river-mouth (German Kieler Förde). Concentrations of Hg were higher in muscle tissue than in liver, but
for Cd and Zn the opposite was the case. The highest mean values for Hg were obtained from eelpouts from
Schwentine river-mouth (Kieler Förde), for Cd from eelpouts from the Bay of Muuga, and for Zn from
eelpouts from the Bay of Kunda. Statistically significant negative correlations have been calculated between
the condition factor (CF) and Hg for eelpouts from Brunskär (Archipelago Sea), Tvärminne (Gulf of
Finland) and Schwentine (Kieler Förde), between CF and Cd for eelpouts from Brunskär, Tvärminne, and
between CF and Zn for eelpouts from Brunskär, Tvärminne and Kunda, respectively, indicating sub-lethal
influences on the condition of the fishes by the metals in question.With the exception of a few liver samples
from Finnish (Tvärminne) and Estonian (Muuga) costal waters the safety level for metals in fish as food in
the European Union were not exceeded.