CHANGES IN TRACE METAL CONTENTS IN FISH FROM THE VISTULA LAGOON (POLAND) DURING THE PERIOD 1995-2007

摘要

The six most commonly caught fish species in the Vistula Lagoon were tested in 2007, including eel (Anguilla anguilla L.), herring (Clupea harengus L), bream (Aramis brama L.), pikeperch (Stizostedion lucioperca L.), roach (Rutilus rutilus L.), and perch (Perca fluviatilis L.). The concentrations of cadmium, lead, mercury, arsenic, copper, and zinc were determined in the fish muscle tissues. Most of the fish tested had low levels of cadmium (1-5 μg/kg), and lead levels were lower than the detection level of the method applied (10 μg/kg). The mean concentration of mercury was in the range of 18-89 fig/kg. The arsenic range in most of the fish tested was 88-137 μg/kg, but herring contained much more of it at 633 μg/kg. Copper was detected in the fish from the Vistula Lagoon in the range of 0.11 -0.48 mg/kg. The zinc content was varied and was from 4.13mg/kg in the muscle tissues of pikeperch to 22.53 mg/kg for eel.rnThe comparison of the results from 1995 and 2007 indicate that there were advantageous declines in mercury (in the muscle tissues of perch, roach, pikeperch, bream, and herring), cadmium (in perch and herring), and lead (in roach, eel, bream, herring). The contents of arsenic and copper remained at unchanged levels (except in eel).rnLow levels of trace metals in the fish of the Vistula Lagoon concur with the estimated weekly intakes (EWI) of metals that are ingested with fish consumption in reference to the provisional tolerable weekly intake (PTWI) established by experts from the FAO/WHO.