Epizootiology of protozoans in farmed salmonids at northern latitudes

antiprotozoaire antiprotozoal agents atlantic salmon ciliophora epidemiologia epidemiologie epidemiology exploitation agricole explotaciones agrarias farms finland finlande finlandia fish culture fish farming fishes ichthyophthirius infecciones por protozoos mastigophora medicamentos contra protozoarios peces piscicultura pisciculture poisson (animal) protozoa protozoal infections protozoose salmo salmo trutta saumon atlantique trichodina