MICROELEMENT COMPOSITION OF SOFT TISSUESOF CORBICULA JAPONICA (PRIME, 1864) IN RAZDOLNAYA RIVER(PETER THE GREAT BAY, THE SEA OF JAPAN)

Abstract

We have examined 3 samples of Corbicula japonica taken at distances of 300, 500, and 1500 m from the Razdolnaya river estuary. The microelement composition of soft tissues of the bivalve mollusk, which lives in the estuary of the Razdolnaya river, is analyzed. No significant differences in the level of trace elements in tissues of mollusks between the samples are found. It is demonstrated that the gills of Corbicula japonica are an effective biological barrier, which accumulates iron, zinc, and manganese in large quantities in comparison with other studied tissues. It is shown that Fe and Zn are mostly present in all studied tissues of Corbicula. Analysis of the microelement composition of the bottom layer of water from the places of mollusk selection shows that there is an excess of the MPC established for fishery reservoirs for such elements as iron and zinc. A morphometric analysis of the mollusks of the studied samples is carried out, while no obvious differences in size and weight characteristics are found.

Keywords

• моллюск Corbicula japonica
• Corbicula japonica
• pollution
• heavy metals
• estuary
• Razdolnaya river