János Salánki

TL;DR: The correlations between the heavy metal concentrations of organs and the individual condition factors of fish samples proved to have opposite trends compared to those related to the age and size of fish, which could be attributed rather to the seasonal change in the condition factor of fish than to variations in the pollutant load of the site.

TL;DR: The relatively low metal concentrations of the ambient water and their poor correlation with the heavy metal load of bream, indicates that for the mature stages of this fish species the metal uptake from food is predominant, and thus the heavyMetal load of fish reflect more the pollution state of the sediment and its biota, rather than that of the environmental water.

TL;DR: The fish species studied as bio-monitors demonstrated that the overall heavy metal pollution of Lake Balaton is not significant, although, during summer an increase of cadmium and lead loading could occur at the catchment area and in the lake.

TL;DR: Regular sampling of molluscs living in Lake Balaton showed that the level of Cd and Hg concentrations increased, while Pb contamination decreased during the past 20 years in mussels, corresponding probably to changes in pollution of the Lake.

TL;DR: Evidence is provided for the bioavailability and toxicity of Al to mussels at neutral pH and at concentrations which are known to enter neutral freshwaters when mobilised by natural or anthropogenic acidity.