Saving Seafood

Millions of Salmon in Norway Killed by Algae Bloom

May 24, 2019 — About eight million farmed salmon have suffocated in northern Norway over the past week as a result of persistent algae bloom, an industry body estimated on Thursday, a blight that some experts suggest has been aggravated by climate change.

Norway is a dominant producer of farmed salmon, and the economic impact of the bloom is significant.

A statement from the Norwegian Directorate of Fisheries estimated the amount of salmon lost at 11,600 metric tons, worth about 720 million kroner, or more than $82 million. An industry group, the Norwegian Seafood Council, suggested the total could be much higher.

“Preliminary numbers point to eight million dead fish — corresponding to 40,000 metric tons of salmon that won’t reach markets,” Dag Sorli, a spokesman for the council, said in an email on Thursday. He put the value of the losses at 2.2 billion kroner.

Read the full story at The New York Times

Algae bloom forces suspension of shellfishing in parts of Down East Maine

It’s the second straight year that a bloom of Pseudo-nitzschia, a phytoplankton that can carry toxic domoic acid, has forced a closure along large parts of the coast.

September 15, 2017 — A marine algae bloom that can carry a potentially deadly neurotoxin has forced the suspension of shellfish harvesting in parts of Down East Maine.

The state Department of Marine Resources reported Thursday that it was monitoring an active bloom of Pseudo-nitzschia, an ocean phytoplankton that carries domoic acid, a toxin that can cause sickness, memory loss and brain damage in humans. It’s the second year in a row that a toxic Pseudo-nitzschia bloom has halted harvesting of mussels, clams and oysters along large parts of the coast.

Before 2016, there was no record of a toxic bloom of this type in the Gulf of Maine.

The department’s public health section found levels of domoic acid that exceeded health standards in shellfish tested between Mount Desert Island and Gouldsboro. That area has been closed to harvesting and the department enacted a precautionary closure from Deer Isle to Machiasport, almost a third of Maine’s coastline.

Department spokesman Jeff Nichols said officials were monitoring the situation closely. There is no indication that contaminated shellfish have made their way to consumers, he said.

“It is impossible to determine at this point if the concentrations of domoic acid will increase in other areas,” Nichols said. “But we know that the phytoplankton that produces it grows rapidly, so we are carefully monitoring the entire coast and will be able to rapidly detect harmful levels of domoic acid and take action to protect the health of Maine’s shellfish consumers.”

Read the full story at the Portland Press Herald

Lab In A Can To Help Identify Toxic Algae Off Washington Coast

After a massive toxic algae bloom closed lucrative shellfish fisheries off the West Coast last year, scientists are turning to a new tool that could provide an early warning of future problems.

Scientists at the National Oceanic and Atmospheric Administration and the University of Washington last week deployed the so-called ocean robot about 50 feet into waters off the coast of La Push, Washington, near a known hotspot for toxic algae blooms.

The tool, dubbed “a laboratory in a can,” will remain in the water until mid-July, providing real-time measurements about the concentrations of six species of microscopic algae and toxins they produce, including domoic acid.

The instrument is equipped with sensors and cellular modems that will allow it to take water samples and send that information to shore three times a week for the next several weeks. Scientists plan to deploy it again in the fall, another critical time for harmful algae blooms.

Last year, dangerous levels of domoic acid were found in shellfish and prompted California, Washington and Oregon to delay its coastal Dungeness crabbing season. Washington and Oregon also canceled razor clam digs for much of the year.

Read the full story at OPB