Invasive species Archives - Saving Seafood

US Customs and Border Protection seizes 3,400 pounds of invasive mitten crabs

January 27, 2020 — U.S. Customs and Border Protection has seized 3,700 live mitten crabs – sent under false manifests – shipped from China and Hong Kong to individuals and businesses in the United States over the past four months.

The crabs were sent in 51 separate shipments through the port of Cincinnati, Ohio, U.S.A., and weighed in at around 3,400 pounds, according to a CBP press release. Mitten crab is considered to be an invasive species that can have a “disastrous impact on native habitats,” according to CBP.

Read the full story at Seafood Source

US refuses entry of invasive Chinese crab

November 2, 2018 — The United States government refused entry of hundreds of pounds of invasive Chinese mitten crabs in Cincinnati, Ohio, U.S.A., earlier this month.

While conducting a routine inspection of incoming Chinese freight at a local express consignment facility, U.S. Customs and Border Protection (CBP) agricultural specialists noted x-ray anomalies in 16 shipments, which were labeled as clothing.

They discovered thousands of live Chinese mitten crabs, destined for residences in New York.

Read the full article at Seafood Source

Climate change draws invasive species to the Arctic

February 27, 2018 — The Arctic is changing. Temperatures are increasing twice as fast as the global average and sea ice is retreating quicker than predicted.

It is now just a question of time before the Arctic becomes ice free in summer.

But while we humans react slowly to the problem at hand, evidence suggests that animals are on the move- on land, sea, and in the air. And in the cold Arctic, invasive species are drawn to regions where they could not previously have survived.

But invasive species pose a big problem for native animals, whose numbers can decline to the point of collapse. They also pose a threat to fisheries, with economic consequences on both a local and global scale.

In fact, our recent study showed that blue mussels have become much more common in the Arctic in recent years, just like other exotic species of bluefin tuna and killer whales.

Read the full story at Phys.org

Marine debris threatens Hawaii’s ecosystem, but collecting it can get complicated

February 15, 2018 — Marine debris continues to litter our beaches, and more of it is on the way if our current weather patterns continue.

Nets, floaters, and other rubbish aren’t just ugly and dangerous to marine life.

They hide small organisms and creatures that could harm our fragile shorelines.

Scott Godwin works with the Hawaii Department of Land and National Resources Division of Aquatics Resources Aquatic Invasive Species (AIS) team. He’s been studying invasive species and marine debris for more than 15 years.

“There’s a lot of stuff out there all the time,” Godwin said, “and Hawaii seems to be in the right place to get that stuff just because of the oceanographic conditions.”

He explained that the current winds and currents have simply been washing debris onshore that would normally otherwise float by the islands and go unnoticed.

The debris poses many dangers. Marine mammals and fish get tangled in floating masses of nets and die.

Read and watch the full story at KHON2

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

What’s best weapon for battling species invading California waters? Data

August 21, 2017 — There’s an invasion plaguing the coastal waters of Southern California.

Waves of tiny interlopers spark havoc at fisheries, clog municipal water pipes and frustrate boaters who must dislodge buckets of sea crud.

They’ve altered our coastal regions’ ecosystems, endangered native fish and birthed such nasty problems as “swimmer’s itch.”

Accelerated in recent decades by international trade, invasive sea creatures have hitchhiked here in and alongside massive cargo vessels from around the globe.

Local officials admit they often don’t know enough about these oft-destructive invaders to halt their environmental takeovers or truly know to what extent the strategies they’ve launched against them are actually working.

But experts from such prestigious organizations as the Smithsonian Environment Research Center have vowed to gather the intelligence needed to rescue native species by studying the incoming hordes, comparing the myriad areas they’ve infiltrated and assessing whether anti-invasive methods and regulations already in place are effective.

“We still don’t know enough about these species,” said Brianna Tracy, a research biologist for the center, which has launched four years of monitoring of the waters along the nation’s largest seaport, the twin Long Beach and Los Angeles cargo complexes.

Read the full story at the Press-Telegram

The Unexpected Tastiness of the Green Crab

August 10, 2017 — Maine’s problem with the invasive European green crab (Carcinus maenas) is not a new one, nor is the idea of finding a commercial use for them. It’s been a tough go for a long time; mostly because it has not been easy to find a market that will pay enough to make it worthwhile for a fisherman to gear up and fish a gang of traps. Recently though, there is a push to make green crabs attractive as a menu item, and I am glad to write that that there is a beam of light sneaking in through that cloudy scenario. The reason? Green crabs can be downright delicious.

To be more specific, we’re talking about soft-shelled green crab, similar to what you’d find with blue crabs down in the mid-Atlantic. Work led by Marissa McMahan, a Georgetown, Maine native and a PhD. candidate at Northeastern University, has taken this product further than anyone else in the state. Since she comes from a fishing family, her scientific and industry connections have been helpful, and the results to date have been quite tasty.

Her own introduction into the topic came courtesy of Jonathan Taggart, also a Georgetown citizen. He discovered fried green crabs at a restaurant in Venice, Italy, and brought the idea to Marissa. Venice is the center of the Italian soft-shell crab trade, and they have a very closely-related species of green crab, Carcinus estuarii. A key in the Italian industry is that Venetian fishermen have identified visible indicators that precede shedding – a fisherman can look at an individual crab and know to a fine degree how soon that crab will molt. This key step has been known for blue crabs in the U.S. for many years, but is only now being understood for green crabs.

Read the full story at NOAA Sea Grant

Federal Report Calls For $275 Million To Stop Asian Carp

August 8, 2017 — The U.S. Army Corps of Engineers has proposed spending $275 million to upgrade defenses against an invading force. The enemy? A fish. Specifically, Asian carp that are threatening to break through to the Great Lakes.

In June, a live Asian silver carp was caught in the Illinois Waterway just 9 miles from Lake Michigan. Scientists fear that if the voracious carp establish themselves in the Great Lakes, they could devastate the region’s $7 billion fishing industry.

The Corps of Engineers wants to upgrade the Brandon Road Lock and Dam near Joliet, Ill., on the Des Plaines River. The waterway is a link between Lake Michigan and the Mississippi River, where Asian carp are already a big problem. The Associated Press writes, “The Brandon Road complex is considered a bottleneck where defenses could be strengthened against fish swimming upstream toward openings to the lake at Chicago.”

Read the full story at New England Public Radio

Scandinavian biologists see threat in crossbreeding by American, European lobsters

June 7, 2017 — Scandinavian biologists say American and European lobsters are crossbreeding and their offspring can survive in European waters, but it is too early to tell if the hybrids can reproduce.

Susanne Eriksson of the University of Gothenberg in Sweden and Ann-Lisbeth Agnalt of the Institute of Marine Research in Norway presented their findings on the threat that American lobsters found in the northeast Atlantic Ocean pose to their smaller European cousins Tuesday during the second day of the International Conference and Workshop on Lobster Biology & Management in Portland.

“American scientists said your lobsters couldn’t survive in European waters, but we have proof they are not only surviving, but competing with the European lobster for food, shelter and mates,” Eriksson said. “They are crossbreeding, the hybrid eggs are hatching, and the larvae are surviving in our tanks, and in our oceans. We don’t know if they can reproduce yet, that’s a year or two away, but we know the males can produce sperm.”

Last year, Sweden asked the European Union to list the American lobster as an invasive species after scientists there found evidence of crossbreeding. The EU bans the import of invasive species, so a listing would have put an end to the $200 million annual export business. The evidence persuaded the forum of EU scientists who study alien species to support a ban, but not the EU politicians who must approve such a listing.

The EU said it might one day explore other protective measures that would not be so disruptive to trade if Sweden returns with further proof of an invasion.

That’s why Scandinavia is continuing to look at how American-European hybrids will fare in the northeast Atlantic, especially once they hit sexual maturity.

Read the full story at The Portland Press Herald

Rep. Moulton: Sweden’s lobster science flawed

August 15, 2016 — Sweden’s response to a highly critical analysis of its rationale for banning the export of American lobsters into the European Union still falls far short of a credible scientific standard, U.S. Rep. Seth Moulton said Friday.

“The science they are citing is flawed,” Moulton said following a congressional briefing by NOAA Fisheries on the international contretemps. “They’ve done nothing to back up their data. And if they can’t back up their data, then there’s something else going on.”

In March, Sweden petitioned the remainder of the European Union to list American lobsters as an invasive species, claiming the increased presence of the American crustaceans in Swedish waters during the past three decades is imperiling its indigenous lobsters.

If successful, the invasive species listing would lead to a ban on U.S. and Canadian live lobster exports to Sweden and the rest of the 28-member European Union. The U.S. exports about $150 million worth of live lobsters to the EU each year — the vast majority landed in Maine and Massachusetts, where Gloucester is the top port — and Canada exports about $75 million.

The Swedish risk assessment, which cites the adverse potential of disease and cross-breeding between the indigenous lobsters and their American cousins across the pond, was like a starting pistol, spurring both U.S. and Canadian governmental agencies, trade officials and lobster stakeholders into action.

Read the full story at the Gloucester Times