Around 500 tonnes of salmon have died recently in Arnarlax’s open-net fish farms in the Westfjords. The company’s board chairman told RÚV that number is within the limits projected by the company. The chairman of the Federation of Icelandic River Owners expressed concern about the deaths and the impact Arnarlax’s operations could have on wild salmon.
Though salmon regularly die in open-net fish farms, 500 tonnes is more than is usual for this time of year. Kjartan Ólafsson, the chairman of Arnarlax’s board says recent extreme weather has led to casualties. According to Kjartan, cool sea temperatures cause salmon to move further down in the nets and rub up against them. The rubbing can cause wounds that eventually lead to the fish’s death.
It is currently slaughter season for Arnarlax’s fish farms, and several ships are docked in the Westfjords to assist with the process. One of them is the Norwegian Gannet: equipped with 14 gutting machines, it is the world’s largest floating salmon processor. Arnarlax expects to harvest 10,000 tonnes of salmon this year, and Kjartan says the 500 tonnes of casualties were within the company’s projections.
Jón Helgi Björnsson, chairman of the Federation of Icelandic River Owners (Landssamband veiðifélaga), said the farmed salmon deaths were concerning. “Basically, it just can’t be normal for 500 tonnes of fish to die in a short period of time. If that’s natural, then of course people have to start wondering if this is an industry people can justify being engaged in. That’s a huge amount of fish that’s dying there.”
Jón Helgi also expressed worry that foreign ships like the Norwegian Gannet could transmit infections to Icelandic fish farms which could then affect wild stocks. “How are these ships disinfected? How does one disinfect an entire ship that is working at salmon farms abroad? We are very concerned that infections from abroad can be transmitted via these ships because of course they are used when similar situations occur elsewhere.”