GyroChlorine - Treatment with chlorine against Gyrodactylus salaris - a field study in Drammenselva watercourse 2017

Laboratory studies have shown that low concentrations of chlorine compounds (hypochlorite and chloramine) have properties that make them suitable for combating the salmon parasite Gyrodactylus salaris. Addition of 30-50 μg chlorine/L eliminates G. salaris from salmon juveniles in 2-6 days. A significant difference in sensitivity to chlorine between the parasite and the Atlantic salmon host is demonstrated, making chlorine interesting as a parasiticide in large-scale treatments in natural river systems.

This project aims to study the effect of chlorine on G. salaris, on the Atlantic salmon, and on the benthic animals in a natural river system during an experimental chlorine treatment of a tributary in the Drammenselva watercourse.

Project Manager

Sigurd Hytterød

Partners

• Norwegian Institute for Water Research (NIVA)
• Norwegian Institute for Nature Research (NINA)