| qualitative risk assessment of routes of transmission of the exotic fish parasite gyrodactylus salaris between river catchments in england and wales. | gyrodactylus salaris is a freshwater, monogenean ecto-parasite of atlantic-salmon. infection of its natural host, the baltic strain of atlantic-salmon, is inapparent. g. salaris also can infect rainbow-trout (oncorhynchus mykiss) permanently, and cause infection of < or =50 days in several other species. it is only on atlantic stocks of atlantic-salmon (salmo salar) that the parasite multiplies unchecked by an immune response, causes death in juveniles and dramatic reductions in wild populations ... | 2004 | 15325771 |