Use of cleaner fish, mussels and other organisms
SustainabilitySalmon lice naturally amongst wild fish, and there are also species of fish that feed on lice. Wrasse and lumpfish are widespread along the coast and are well-suited to our climate. They have proven to be effective for cleaning up in fish farming facilities.
Many companies are now breeding cleaner fish to use in salmon farms, and we at BioMar produce feed for cleaner fish.
Mussels prevent salmon lice
In the same way as with cleaner fish, it has also been proven that mussels can prevent the spread of salmon lice. There have been good results in many practical trials and this is now being tested on a larger scale.
Integrated aquaculture with several organisms
The environmental foundation Bellona and the Lerøy Seafood Group are working together to develop new forms of production for biomasse. So-called integrated, multi-trophic aquaculture, a biological system where several types of species are cultivated together and live off one another's waste.
Fish farms are operated side by side with the cultivation of mussels, algae, seaweed and invertebrates. An independent ecosystem is formed in which the waste from one species are the nutrients for another. Integrated aquaculture can produce more sustainable and efefctive use of marine resources and the foundation for increased production.
Around the fish nets there will be for example faeces from fish, lice larvae and the remnants of fish feed, and this will provide sustenance for other species. The largest organic particles sink to the bottom where artificial reefs provide the living environment for species that feed themselves on the waste from the fish farm. This provides a greater biological diversity that can be harvested.
Cultivating seashells and seaweed around the fish farm creates a self-cleaning ecosystem that produces more food, fatty acids, medicines and bioenergy in an environmentally-friendly and sustainable way.
Photo: Geir Bornø