In November, the first lines with 9 different variants of the local seaweed species sugarkelp (Saccharina latissima), were set out offshore near Grenaa by Aarhus University. The conditions were very challenging with hazardous currents, difficult wave conditions and a very hard underground filled with calcium. Three anchors broke before the first line was anchored at the bottom. However, the advantage of the area is the high water clarity, water flow and nutrient-rich water. In the offshore trial at Grenaa, the seaweeds will be cultivated from 0-10 meters depth. Inshore in Limfjorden the same seaweed variants will be cultivated but only from 0-3 meters depth. The growth conditions are expected to be less advantageous here with less light and warmer waters during summer.

At the two cultivation sites a preliminary breeding will be tested and the growth of the 9 variants will be compared. The breeding is performed by Hortimare in the project consisting of a classical selection and breeding technique, which starts with the natural population and selecting of individual sugarkelps with good properties. From these individuals the seedlings for the next generation of cultivated seaweed is produced. Read more HERE about breeding techniques of MAB4. The lines set out consist of a special algae textile produced by SIOEN industries which is also part of the project.

The next step will be to set out more seaweed and try out other substrates from SIOEN. Different methods for anchoring will also be tested.