Studnicka M., 1981. Studies on mercury content in muscles of fishes from some natural Polish water bodies. Acta Ichthyol. Piscat. 11 (1): 59-73.

Total mercury contents were determined in muscles of 16 fish species caught in the river Vistula, its tributaries, and the Łęczyca-Włodawa lakes. All the Vistula fishes examined showed much higher mercury contents compared to those found in fishes from unpolluted waters; mercury contents in many predatory fishes exceed 0.5 mgּkg-1.