Humpback whales have been caught sneaking into shallow-water salmon hatcheries in Alaska for an easy meal. The whales have learnt that the hatcheries release juvenile salmon into the water at certain times of year, and regularly return for free lunches. But while the habit might be good for the whales, it may prove harmful to the local fishing industry. Humpback whales have learnt that hatcheries in Alaska release juvenile salmon into the water at certain times of year to bolster local fishing reserves, and regularly come back for free meals. The huge mammals grow up to 16 metres (52 feet) in length.
OSLO – Atlantic salmon farming companies are designing huge pens to raise fish in the open seas in a radical shift from calm coastal waters where marine lice have slowed growth of the billion-dollar industry. The drive for new designs by Norway, producer of 54 percent of all farmed Atlantic salmon in 2016, will have to cope with ocean storms that can rip cages and free thousands of fish. Escapees disrupt natural stocks by breeding with wild cousins. "The industry has to develop and to solve the environmental challenges it has, especially linked to salmon lice," Norwegian Fisheries Minister Per Sandberg said, referring to parasites that often spread infections resistant to antibiotics. One-fifth of salmon farmed in Norway die before reaching maturity, partly due to tiny blood-sucking lice that latch onto the outside of the pink fish.
Levels of beneficial omega-3 oils in farmed salmon have fallen significantly in the past five years, a study shows. BBC News has learned that, on average, levels of omega-3s halved in the fish over that period. Despite this, the analysis shows that farmed salmon is still one of the richest sources of these fatty acids. But the industry is exploring new ways to arrest the decline - which appears to be due to the type of feed given to the farmed fish. The study was carried out by researchers at Stirling University.
Even if growing methods are sound, cobia's struggle comes down to market share. The acclaimed International Boston Seafood Show--where business deals are inked in squid blood--is jokingly called the Boston Salmon Show. If fish had a monarchy, salmon would be king. The annual salmon-industrial complex is worth just under 10 billion. The fish has the widest portfolio of ways it's produced: caught in oceans and rivers, farmed on land, and farmed in the wild.