CONCENTRATIONS OF SOME HEAVY METALS IN ORGANS OF TWO FISH SPECIES FROM THE BEYSEHIR LAKE, TURKEY

摘要

Concentrations of heavy metals (Cu, Fe, Zn, Mn, Cr and Pb) were measured in muscle, liver and gill of two fish species (Leuciscus cephalus and Stizostedion lucioperca) from the Beysehir Lake. Also, the relationships between fish lengths and metal concentrations in the tissues were investigated by linear regression analysis. Fe, Zn and Mn were detected in different fish sample tissues, while Cu, Cr and Pb were undetectable in all fish samples ( < 0.03 mg L~(-1)). Mn was also below this limit of detection in the muscle of L. cephalus, and muscle and liver of S. lucioperca. In general, the lowest levels of all these metals were found in muscle tissues, and their mean concentrations under the permissible limits proposed by FAO. Results of linear regression analysis showed that relationships between metal concentrations and fish lengths were significantly positive, and negative relationships were not found at all. Highly significant (P < 0.01) positive relationships were observed between fish length and Fe levels in the liver of S. lucioperca, Zn concentrations in the muscle and Fe concentrations in the gill of L. cephalus, and Fe concentrations in the liver, and Mn concentrations in the gill of S. lucioperca showed also significant (P < 0.05) positive relationships, which were discussed.