Studies on the effects of cage culture of fish on the parasite fauna in a lowland freshwater loch in the west of Scotland

摘要: The parasite fauna of cultured and wild fish in an eutrophic lowland freshwater loch the west Scotland was studied compared order to assess impact 4 years' culture activity on natural fauna. Strigeid metacercariae dominated but infection lower caged trout than feral fish. Important protozoan pathogens were present probably introduced with stocked Intensity protozoa low, due therapeutic chemical treatments, exception ofTrichodina sp. which a persistent problem. Endoparasitic helminths typical salmonids absent. introduction new host species had little effect at this stage diversity parasitic helminth influenced relative abundance certain species.