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.
The Institute of Marine Research has analyzed 182 Our Ocean commitments from the past five years. Overall, the commitments have mainly generated attention and funding. The direct impact on sustainable fisheries and management is less obvious.
Researchers used to enter their survey data into cumbersome spreadsheets. These days they have StoX – a free, open source program, developed at the Institute of Marine Research (IMR) that has now been documented in an international research journal.
Today the UN’s Intergovernmental Panel on Climate Change (IPCC) is launching its special report on the oceans and cryosphere. Geir Ottersen, a scientist at the Institute of Marine Research (IMR) and one of the main authors of the report, is concerned about the changes taking place in the Arctic.
The Arctic cod, the Arctic cousin of the Atlantic cod, is a key species in the northern Barents Sea. The whole ecosystem may therefore be destabilised by the spawning grounds of the Arctic cod shrinking as a result of declining sea ice cover.
Smart fishing gear, scientific publications and training new researchers are just a few of the achievements of the Centre for Research-based Innovation in Sustainable fish capture and Pre-processing technology (CRISP).
By analysing their stomach contents and faeces, and multiplying the results by the number of grey seals in Norway, researchers estimated that they consume 8,000 tonnes of fish per year. Saithe, cod and wolffish were their favourite foods.
In the North Atlantic there are several hundred thousand baleen whales that migrate long distances, whereas in the North Pacific there are just a few hundred of them. That is the conclusion of a new study.
In much the same way as humans, mackerel need their own personal space too. Crowding the mackerel during the catch process might have significant consequences when those mackerel end up on our dinner plate.
Field experiments show that seismic activity does not harm this important species of zooplankton: not at all when the air guns are over ten metres away, and with a maximum of 30% higher mortality than controls even in close proximity.