Bartel R., 1985. Results of stocking of the Baltic Sea with tagged rainbow trout (Salmo gairdneri Rich.). Acta Ichthyol. Piscat. 15 (Suppl.): 3-20.
45321 tagged rainbow trout were released to the Baltic Sea, mainly to Vistula Firth, and to a few Polish rivers, mostly to the Vistula. Average returns were 8.8%, ranging from 0 to 30%. Tag returns depended on time and place of fish release, fish size and age.