By Glenn A. Bristow
Fisheries Research, Volume 17, Issues 1-2, Pathological Conditions of Wild Salmonids, June 1993, Pages 219-227, ISSN 0165-7836, DOI: 10.1016/0165-7836(93)90021-X.

Of the 40 known species of parasites of wild freshwater Norwegian Salmonidae, nine are currently recognised as pathogens in Norwegian freshwater aquaculture of salmonids and/or salvelinids. A further five are known as pathogens of wild Norwegian Salmonidae, while at least eight of the remaining species are known as pathogens in wild or farmed Salmonidae outside of Norway. Some of the Norwegian pathogens have only been recognised as such in the last 5 years. Wild Salmonidae are, in most cases, the only reservoirs for these parasites in Norwegian freshwaters and the number of parasite species and instances of their known pathogenicity are likely to rise at current levels of production.

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