Parallel analysis of some heavy metals concentrations in the Anguillicola crassus (Nematoda) and the European eel Anguilla anguilla (Osteichthyes)

Adult specimens (males and females) of the swimbladder nematode Anguillicol a crassus were collected from eels in the Vranov Valley Reservoir (Czech Re public), and examined for Pb, Cd, Cr and Ni concentrations using two differ ent methods of atomic absorption spectrometry. The concentrations of Pb, Cd , Cr and Ni in the nematode body tissues were higher than those obtained fr om muscle samples of infected eels. The heavy metal accumulation capacity o f A. crassus males was higher than that of females.