The second year of low-trophic aquaculture cultivation at Kriegers Flak has now ended june 2025. Kerteminde Seafarm, Aarhus University, and DTU Aqua went out to conduct the final sampling and to dismantle the lines and buoys used for mussel and seaweed cultivation as part of the WIN@Sea project.As expected, there was little seaweed left in the system at this point, and the structures had started to become overgrown with fast-growing filamentous algae and mussels that had settled on the lines over the winter.Among the deployed green algae, one species known to tolerate low salinity had performed relatively well during the spring. However, the yield was affected by significant mussel fouling. The mussels were densely packed on the ribbons, and the socked mussels had grown since the previous visit in April. However, no mussels of marketable size were observed in the area. After completing the sampling and retrieving the mussel and seaweed lines, the main lines were cut, and the moorings attached to the large concrete blocks used as anchors were prepared for retrieval with a larger vessel later in June. Now the mussel biomass will be measured, and the seaweed and mussels analyzed for their elemental composition, to evaluate both the quality of the biomass, and the potential environmental effect of the production. The biomass measurements will also be forwarded as input for ecosystem modelling of the potential environmental effects of the production in the area.

The water temperature in the system was approximately 13 °C, and salinity measured 8.