Present situation of the Vistula sea trout

Abstract

The aim of the paper was to show the present status of Vistula sea trout. Pollution of water in the Vistula River has reduced population of Vistula sea trout. When the Vistula River was dammed in 1968, Vistula sea trout population dropped drastically. In 1972-1992 from 32 000 to 314 000 smolts and from none to 1 446 100 alevins were released into the Vistula River yearly. In this period the sea trout catches in the Vistula River varied from 30.9 to 129.1 t. Effectiveness of stocking based on sea trout catches in the Vistula estuary and the Vistula River was 295.5 kg/1000 smolts on the average.