Millions of cleaner fish are used in farm cages to eat lice off salmon every year. However, there is limited research into how efficiently they do this job. Now scientists have gone through all published studies in the field – and found large knowledge gaps.
The ocean can supply much of the food required to feed an ever growing world population, primarily through the sustainable expansion of marine aquaculture. But not without improved ocean management and new technology.
Physically separating salmon from salmon louse larvae reduces infestation of salmon by 75 percent compared with a normal sea cage. This has now been scientifically demonstrated using a “snorkel” cage at a commercial fish farm.
A new study by the Institute of Marine Research (IMR) shows that a major oil spill off the Lofoten and Vesterålen islands could produce long-term changes in the ecosystems in the Norwegian Sea and Barents Sea.