tsunami Archives - Saving Seafood

Japanese Animals Are Still Washing Up in America After The 2011 Tsunami

Plastics and metals have made it much easier for invasive species to raft across oceans.

September 29, 2017 — On March 11, 2011, an unprecedentedly powerful earthquake struck the Tōhoku region of Japan. It destroyed hundreds of thousands of buildings, wrecked the Fukushima Daiichi nuclear plant, created a tsunami that reached 40 meters in height, and shifted the entire planet a few inches on its axis. But among these catastrophic consequences, there were also subtler ones. For example, the tsunami inundated a small blue-and-white fishing boat called the Sai-shou-maru, ripping it from its moorings and casting it out to sea.

The boat drifted eastward through the Pacific, never capsizing. Then, on March 22, 2013, a couple weeks after the two-year anniversary of the quake, it washed ashore on Long Beach, Washington. Its hull was encrusted with seaweed and barnacles, and one of its compartments was full of water. And living in that water were five striped beakfish. The fish were youngsters, just four inches long. They had probably been swept into the boat as larvae, and spent their entire lives growing up within this ersatz aquarium. For two years, the boat was their entire world.

Four of those fish were euthanized by the Washington Department of Fish and Wildlife, but the fifth—now known as the “tsunami fish” was relocated to Oregon’s Seaside Aquarium. Its story astonished John Chapman, an ecologist at Oregon State University who studies aquatic invasive species. Somehow, this coastal species had endured a two-year, 4,000-mile voyage across the open ocean, in the tiniest of living spaces. “We said this couldn’t happen,” Chapman told OregonLive. “And nature is like: Oh yes it can.”

Of late, nature has been saying that to Chapman a lot.

In the last five years, he and his colleagues have documented 634 pieces of debris that were swept away by the Tōhoku tsunami and eventually washed up on the coasts of North America. And it hasn’t stopped coming yet. Between them, these bits of ocean-hopping junk carried 289 species that are typically found along Japanese coasts—a vast horde of sponges, sea stars, sea anemones, mussels, limpets, barnacles, and fish.

Read the full story at The Atlantic

Study negates concerns regarding radioactivity in migratory seafood

September 5, 2017 — When the Fukushima power plant released large quantities of radioactive materials into nearby coastal waters following Japan’s massive 2011 earthquake and tsunami, it raised concerns as to whether eating contaminated seafood might impair human health—not just locally but across the Pacific.

A new study by an international research team shows that those concerns can now be laid to rest, at least for consumption of meat from migratory marine predators such as tuna, swordfish, and sharks.

The team focused on cesium, a silvery metal with a large number of radioactive isotopes. Two of these, 134Cs and 137Cs, form when uranium fuel breaks down in nuclear reactors. The cesium isotopes are of particular concern because they were discharged in large quantities following the disaster, exhibit relatively long half-lives (2.1 and 30 years respectively), and tend to accumulate in the muscle tissues that people like to eat.

However, the team’s sampling of tissues from predatory fishes and other large vertebrates collected across the northern Pacific between 2012 and 2015 revealed no detectable levels of 134Cs, and 137Cs concentrations that were generally consistent with background levels from aboveground nuclear testing during the 1940s and 50s. They collected the animals from waters near Japan, Hawaii, and California.

Read the full story at Phys.org

Japanese fisherman preparing to reunite with his boat in B.C., four years after tsunami

July 3, 2015 — After the earthquake, a 23-metre-high tsunami ripped through the Japanese port town of Ofunato, destroying houses, tumbling cars like toy blocks and capsizing ships in the harbour. Stacks of freight containers were swept off the docks and sent hurtling through the town. People fled up the steep streets around the harbour, and the air was filled with the terrifying screeches of buildings being torn apart.

This was how the great earthquake and tsunami of March 11, 2011, arrived in Ofunato, a town of 41,000 that, through the miraculous journey of one small boat, has become linked to the tiny fishing village of Klemtu, population 450, on British Columbia’s Central Coast.

When the wave of water that rose along coastal Japan that day swept back out to sea, it left more than 15,000 people dead and took almost five million tonnes of debris with it. Lost were about 1,000 vessels, including many of the boats in Ofunato harbour. Most of the debris soon sank, but an estimated 1.4 million tonnes drifted offshore.

Four years later, fragments of the communities shattered in Japan continue to reach North America’s West Coast, raising pollution concerns but also serving as touching reminders of what was lost. Everything from small plastic toy soldiers that washed up on beaches to a 50-metre fishing boat that eventually sank in the Gulf of Alaska has made the crossing. Most of the debris can’t be traced, but occasionally serial numbers allow a connection to be made.

Read the full story at The Globe and Mail