Farmed salmon need zinc to avoid getting sick. But zinc in the ocean harms the environment
Either farmed fish health or the environment suffers.
OPINION: Whilst we wait for the Taliban to meet international human rights standards, it would be wrong to withhold humanitarian assistance as the harsh winter draws in. Humanitarian action will build confidence on both sides whilst providing critical aid.
An entrepreneurial company called Seaweed Solutions is now harvesting more than 100 tonnes of nutritious kelp from a seaweed farm off the coast of central Norway. The seaweed is being sold to food producers in Europe. “This industry will be big,” says an independent researcher.
OPINION: A large upscale of the kelp industry is probably around the corner in Norwegian coastal waters. In order to conduct kelp farming in an ecologically and economically sustainable way, it is crucial to understand how the ecosystems work.
The aquaculture industry doesn’t do a good enough job supervising the use of cleaner fish, and many die. Unless the industry does a better job documenting the welfare of cleaner fish, it will need to stop using them, the Norwegian Food Safety Authority states in new report.
Salmon are briefly immersed in warm water so the lice lose their grip. The treatment is the most common non-chemical delousing method used at Norwegian fish farms. But its imminent ban comes as new research reveals the pain and injury to the salmon.
In my career as a researcher and head of food research I have been met with quizzical looks many times. Is it possible to research food? Most people see the need to understand more about nutrition and the body’s need for nutrients. But what else could there be to research?
“If you get sick and need to throw up, that’s fine, but if you don’t then that’s fine too,” says the skipper, laughing through his big smile, before setting off on the voyage taking nine excited business professionals and R&D representatives out on his boat towards the open sea. The location is Macau in northern Brazil. The goal: to harvest flying fish roe.
The amount of fish in the world is being reassessed upwards. Some ten billion tonnes of fish that live at depths down to a kilometre are not fished at all. A University of Bergen professor thinks this biomass will be much more important for humankind in the future.
Cod migrate from the Barents Sea to the Lofoten Islands in North Norway to spawn every winter. The fishing season for these large spawning cod, called skrei in Norwegian, is currently open. A traditional North Norwegian serving of the fish is a super source of vitamin D.
Zebrafish have been used as a research standard to help scientists expand our understanding of everything from skin cancers to cardiovascular disease. But one Norwegian researcher cautions that research that relies on zebrafish might be less reliable because the fish are not fed a standardised diet.