Scientific publications

The paper presents the results of the parasitological study of juvenile Atlantic salmon, brown trout and grayling from River Vefsna (Northern Norway). Data on the infestations rates are reported. A total of 24 parasite species belonging to 7 taxonomic groups were found: flagellates – 1, myxosporidians – 5, infusorians – 5, monogeneans – 3, cestodes – 3, trematodes – 6, parasitic crustaceans – 1. The heaviest infestation was recorded in the brown trout (17 parasite species), the lowest – in Atlantic salmon parr (4 sp.). It is stressed that the qualitative and quantitative characteristics of the fish parasite fauna in River Vefsna are determined by the specific hydrological and hydrobiological regimes, as well as the fish species composition in the river.