The Mysterious Decline of Sea Trout in the North Sea

The Maritime Executive

Sea trout numbers are declining in Norway and scientists don’t know why. Sea trout get no peace. They’re constantly exposed to new diseases and ailments, many of which are due to climate change and human activity.

Now a team of researchers want to find out which diseases are affecting the fish so they can know how to help them. The researchers plan to explore the entire coast of Norway, but have started on a smaller scale.

“We’ve investigated viruses, bacteria and parasites on 160 sea trout in the Skjerstadfjord and the Tosenfjord in Nordland county,” says associate professor Jan Grimsrud Davidsen in the Department of Natural History at the NTNU University Museum.

The research group searched for 46 different disease-causing factors, so-called pathogens, and found 11 of them.

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