Sobecka E., Protasowicki M., 2002. Changes in contents of zinc and copper in organs and blood of nickel-exposed European catfish, Silurus glanis L. Acta Ichthyol. Piscat. 32 (1): 23-34.

Effects of nickel, administered as aqueous solutions of nickel (II) nitrate (V), on European catfish, Silurus glanis L. were studied. The fish were at first exposed for 24 h (short-term exposure). The results obtained during the short-term exposure were used to determine the amount of nickel to be used during a 60-d (long-term) exposure. A significant effect of nickel on the distribution of zinc and copper in the fish blood and organs was found. The changes may have produced disturbed metabolism of the microelements under study during biochemical and energetic processes in the fish. Neither the short- nor the long-term exposure of the fish to nickel resulted in a significant accumulation of the metal in muscles; nor were changes in the microelement concentration in muscles observed.