Random amplified polymorphic DNA (RAPD) analysis of three Norwegian Gyrodactylus salaris populations (Monogenea:Gyrodactylidae).

Gyrodactylus salaris Malmberg, 1957 from Atlantic salmon (Salmo salar L.) parr in 3 Norwegian rivers have been compared genetically by the use of random amplified polymorphic DNA (RAPD) analysis. Two primers revealed polymorphism between different populations of G. salaris. This variation has probably arisen since the introduction of G. salaris to Norway in the 1970s and complements results showing morphological variation between G. salaris from different geographical areas.