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Heuch PA, Jansen PA, Hansen H, Sterud E, MacKenzie K, Haugen P, Hemmingson W
Parasite faunas of farmed cod and adjacent wild cod populations in Norway: a comparison
Atlantic cod Gadus morhua is host to >120 species of protozoan and metazoan parasites. Heuch and co-authors investigated parasite interactions between farmed and wild cod from 4 locations in Norway. A total of 48 parasite taxa were recorded from 343 cod. Transmission between wild and farmed cod is most likely in the case of ectoparasites with direct single-host life cycles, and a few such species were identified; the monogenean Gyrodactylus marinus and ciliate protozoans Trichodina spp. are expected to be the most problematic in the mariculture of cold-water marine fishes. Two parasitic copepods that have been widely predicted to pose serious threats to cod farming, Caligus spp. and Lernaeocera branchialis, were rarely found on farmed cod.
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