Saving Seafood

Could This Tool Save Washington’s Shellfish?

February 25, 2019 — SEAFOOD NEWS — Washington is home to thousands of marine species. Salmon, crabs and bivalve shellfish like oysters and clams fuel both the aquatic food chain and human fisheries — and they thrive under stable levels of acidity, salinity and other marine growing conditions.

But over the past few decades, climate change has acidified the world’s oceans at an unprecedented rate, threatening the biodiversity that defines our region and supports these fisheries. As the concentration of carbon dioxide in our atmosphere increases, the ocean dissolves more of it at the surface — producing conditions in Puget Sound and beyond that exacerbate shell deformation, promote toxic algal blooms and create other hurdles to healthy waters. According to the Washington State Blue Ribbon Panel on Ocean Acidification, 30 percent of Washington’s marine species are in danger from it.

Ultimately, stopping ocean acidification requires unprecedented international mobilization to reduce greenhouse gases. But if scientists and others could predict the complex undersea interactions that enable its worst effects, they could pull the trigger on short-term, local solutions that might help people and wildlife work around them. Researchers at the University of Washington have invented a computer model to do just that. Each day, LiveOcean compiles a vast array of ecosystemic data — currents, salinity, temperature, chemical concentrations, organic particles and more — to create a three-dimensional, 72-hour forecast for the undersea weather of the Pacific Northwest.

This is a particularly welcome tool for the state’s $270 million shellfish industry, which produces more farmed bivalves than the next two most productive states combined, according to the U.S. Department of Agriculture.

On the shores of Puget Sound, carbon emissions, excessive nutrient runoff and warming temperatures have made waters that used to be ideal for shellfish farming less dependable, resulting in catastrophic die-offs of oyster larvae in the late 2000s. According to the University of Washington’s Washington Ocean Acidification Center (WOAC), Willapa Bay hasn’t produced any natural oysters for the majority of the past decade, forcing shellfish farmers to purchase “seeds” from hatcheries.

“We know that the seawater chemistry conditions are different now than in the preindustrial era — we see pteropods with pitting and holes in their shells that are due to corrosive seawater conditions,” WOAC Co-Director Dr. Jan Newton said by email. “The CO2 increase is largely (~90%) due to emissions from fossil fuel combustion.”

But with help from LiveOcean, aquaculture has a shot at adapting farming schedules to the ebbs and flows of mercurial ocean chemistry before more permanent solutions are in place. The state-commissioned model is designed to forecast ocean-circulation patterns and underwater environmental conditions up to three days out. Eventually, it could help everyone in the region get a better understanding of how a changing climate impacts a major source of food, funds, fun and regional pride.

Designed by 10 researchers over the course of 15 years, LiveOcean is finally available to Pacific Northwest shellfish farmers (and the public at large) ahead of the 2019 spring oyster spawning season. LiveOcean was pursued in earnestafter Gov. Jay Inslee’s 2012 Blue Ribbon Panel on Ocean Acidification recommended the state “establish the ability to make short-term forecasts of corrosive conditions for application to shellfish hatcheries, growing areas and other areas of concern.” The panel created WOAC and allocated $325,000 toward LiveOcean, which is also funded by the National Science Foundation and the National Oceanic and Atmospheric Administration..

Understanding how water moves is essential to predicting where and when instances of high acidification will be most damaging to shellfish farms, beachgoers and more. The ocean always circulates: The currents scoop up surface water, pull it into the depths of the ocean, then dredge it upward in what LiveOcean lead researcher Parker MacCready calls “underwater rivers.” These cycles circulate water over the course of decades. When water “upwells” back to the surface, carrying nutrients and dissolved carbon dioxide, it’s been out of sight for 30 to 50 years. “It is the biggest thing controlling water properties in the Salish Sea,” MacCready says.

These days, the “river” is returning with more nutrients and carbon dioxide — reflections of increased fossil fuel use, agriculture and other human activities during the 1970s. Because we know atmospheric carbon dioxide has increased since then, scientists say we can expect to see even worse ocean acidification in the future. And the interaction between human fossil fuel output and agricultural runoff with Puget Sound’s natural geography can make things worse.

“Relative to other coastal regions, Puget Sound is somewhat different in its expression of acidification,” Newton says. “Warming can be intensified or prolonged due to Puget Sound’s retentive nature.”

A system as dynamic as Puget Sound needs dynamic monitoring, and that’s where LiveOcean comes in.

“[LiveOcean] models circulation — currents and mixing — and, at the same time, all the things that are moved with the currents: salt, heat, oxygen, nitrate, phytoplankton, zooplankton, detritus, and carbon variables like dissolved inorganic carbon [DIC, like CO2)] and alkalinity,” MacCready says. “You need to have a really big computer, and deep knowledge of many ocean processes — like physics, chemistry and biology.”

LiveOcean draws on lots of types of data. It sources real-time river-flow information from the U.S. Geological Survey and Environment Canada and three forecasts for conditions in rivers, the ocean and surface and atmosphere.

LiveOcean isn’t the only model for underwater forecasts in the Puget Sound and greater Salish Sea region, but it’s unique in significant ways. LiveOcean is the only one that publicly forecasts oxygen concentration (which decreases as acidity increases, putting animals at risk of hypoxia), pH (the primary measurement of acidity), and aragonite (the most important mineral used by oysters to build their shells, and which decreases with acidity). Acidicified water corrodes and sometimes dissolves protective shells, forcing shellfish to expend extra energy on basic life functions.

Equipped with this data, LiveOcean can be used to predict where acidified water will move throughout the coastal ocean, estuaries, the Salish Sea and ultimately 45 rivers. Shellfish growers can then ideally use that information to determine when and where they should release sensitive larvae, which spend their first few days of life developing shells and essential organs. To ensure shellfish larvae survive through their first two days of life, aquaculture managers release larvae during peak levels of photosynthesis and aragonite. When adults have to battle corrosion to keep growing, they’re not putting energy into reproducing.

“We are still working on the best way to get that to shellfish growers in a meaningful way. [Like how] some clever app developer distills all the terabytes of a weather simulation into a few useful sun and cloud icons on your phone,” MacCready says. “We are not there yet, but that is a key task for this spring.”

According to Bill Dewey, director of public affairs at Taylor Shellfish Co., shellfish hatcheries can account for the majority of acidic events by fixing water chemistry as it enters the hatcheries, making forecasts less essential to overall planning. They inject more basic (less acidic) mixtures into treatment systems, adjust pumping times, and add shell-building minerals to oyster environments.

“Where [forecasting] remains critical is for those in the industry who have what we refer to as remote setting stations,” Dewey says.

Setting stations — land-based tanks filled with mesh bags of oyster shells and heated seawater — are where oyster larvae start their lives. Operators place the free-swimming, hatchery-hatched larvae in the tanks, where they “set” by attaching themselves to discarded oyster shells and making them their own.

“They are vulnerable to all sorts of stresses as they make this difficult transition, including bad water chemistry,” he says. “These operations don’t typically have water chemistry monitoring and treatment capacity, to where LiveOcean predictions could help them ensure they are setting under optimal conditions.”

LiveOcean is also the only ocean model that forecasts for microscopic plantlike organisms called phytoplankton, which shellfish eat. Phytoplankon are the essential first link of most marine food chains: the more phytoplankton, the more organic matter in the ocean. However, this can lead to increases in algae blooms, which cover the ocean’s surface and limit oxygen and sunlight. When the blooms die, they create dead zones and add to the ocean’s mounting CO2 reserves.

While LiveOcean was developed with the shellfish industry in mind, its ability to predict water movement throughout Puget Sound makes it useful for other applications.

NOAA uses LiveOcean to track toxic algal blooms and make decisions about beach closures for coastal razor clam harvests.

LiveOcean’s forecasts also feed into tailored apps meant for tuna fishermen, boaters, beachgoers and more. It also models historical ocean events, which helps researchers make projections for how animals and substances travel through the ocean. Elizabeth Brasseale, a UW graduate student in oceanography, used LiveOcean to explore the origin of invasive green crabs that began infesting the West Coast in the late ’80s. Knowing where the crabs come from will inform attempts to eradicate them.

“Their range has been expanding, but in all that time they haven’t entered the Puget Sound,” Brasseale says. Using LiveOcean, she was able to see how the Salish Sea’s current patterns act like a force field keeping the invasive larvae out.

Some green crabs snuck into Puget Sound between 2014 and 2016, when an intermittent patch of warm water called “the Blob” appeared, mystifying oceanographers. Data from LiveOcean uncovered the conditions that allowed the infestation, and it can predict when and where it might happen again.

“By using LiveOcean as a backcast, we can see what the ocean was doing during those years that allowed the larvae to get in,” Brasseale says. “By using LiveOcean as a forecast, we can watch for recurrences of those ocean patterns and know if we’re going to be vulnerable to invasive larvae.”

LiveOcean’s potential for creating new and  extended applications is only just beginning to be explored.  Recently, parasitic burrowing shrimp have infested Pacific Northwest oyster farms. They’re usually held at bay by fresh water, and that got Dewey to thinking about how LiveOcean could investigate the problem.

“Some speculate that damming the Columbia has contributed to the proliferation of the shrimp, so there are no more floods and major freshwater events in the bays to kill the shrimp,” he says. “Perhaps with LiveOcean and knowledge of the shrimps’ life cycle, freshwater releases from the dams could be done to both benefit salmon and control shrimp.”

As more people apply the tool in different ways, a better picture of ocean dynamics will inform how humans adapt to it in the Pacific Northwest.

“[We’re developing] the ability to see seawater conditions and how they change in time and space. It is exciting that the applications are so numerous,” Newton says, noting oil spill tracking potential. “We gain very basic information on how Puget Sound functions. This tool opens doors to many new avenues of research and understanding.”

The following was released by SeafoodNews.com, a subscription site. It is reprinted with permission.

Big sea, bigger data: How analytics are making peace between fishermen and turtles

February 5, 2019 — The ocean is complicated. Our tools to manage it are blunt.

We often approach the ever-changing ocean as if it were a stationary valley in a national park. We close entire coastlines and restrict fisheries to protect single species. We’re flummoxed by wide-ranging mobile marine life and unprepared for climate change.

But a new generation of data-driven tools balances the needs of fish and fishermen and adapts automatically as the environment changes.

With the government’s towering stockpiles of ocean data, scientists can use weather and ocean chemistry to predict where fishermen are likely to catch their intended targets, including swordfish or tuna, and avoid protected species, such as marine mammals, sharks or manta rays.

Google and Facebook analyze data to predict our behavior with unnerving precision. With dynamic ocean management, scientists use similar strategies to protect the areas where turtles, albatross or whales are most likely to congregate in a given day or hour.

Read the full story at The Washington Post

Ocean heat waves like the Pacific’s deadly ‘Blob’ could become the new normal

February 1, 2019 — When marine biologist Steve Barbeaux first saw the data in late 2017, he thought it was the result of a computer glitch. How else could more than 100 million Pacific cod suddenly vanish from the waters off of southern Alaska?

Within hours, however, Barbeaux’s colleagues at the National Oceanic and Atmospheric Administration (NOAA) in Seattle, Washington, had confirmed the numbers. No glitch. The data, collected by research trawlers, indicated cod numbers had plunged by 70% in 2 years, essentially erasing a fishery worth $100 million annually. There was no evidence that the fish had simply moved elsewhere. And as the vast scale of the disappearance became clear, a prime suspect emerged: “The Blob.”

In late 2013, a huge patch of unusually warm ocean water, roughly one-third the size of the contiguous United States, formed in the Gulf of Alaska and began to spread. A few months later, Nick Bond, a climate scientist at the University of Washington in Seattle, dubbed it The Blob. The name, with its echo of a 1958 horror film about an alien life form that keeps growing as it consumes everything in its path, quickly caught on. By the summer of 2015, The Blob had more than doubled in size, stretching across more than 4 million square kilometers of ocean, from Mexico’s Baja California Peninsula to Alaska’s Aleutian Islands. Water temperatures reached 2.5°C above normal in many places.

Read the full story at Science Magazine

Study: Northwest Salmon Not Immune To Ocean Acidification

December 27, 2018 — A new study suggests that salmon will not be immune to the effects of ocean acidification. Scientists found that changes to ocean chemistry disrupt a fish’s ability to smell danger in the water.

Researcher Chase Williams of the University of Washington exposed young coho salmon to the elevated ocean CO2 levels expected over the next few decades. He then dropped in an odor that normally makes the fish react as if a predator is near. The fish ignored it.

“They’re still smelling odorant, but the way their brain is processing that signal is altered … Before, they would avoid this predator odor and now they’re more indifferent to it,” Williams said.

The results are concerning because salmon rely on smell to avoid danger, find food and to find their way back to spawning grounds in West Coast rivers.

Co-author Andrew Dittman is a scientist with the federal Northwest Fishery Science Center. He said the results could apply to other salmon species.

“The mechanisms involved … are very similar. So the expectation would be that we would see relatively similar phenomena in the other species as well,” he said.

Read the full story at KUOW

Salmon to lose sense of smell as CO2 levels rise

December 19, 2018 — As atmospheric CO2 levels continue to rise, increasing amounts of carbon dioxide will be absorbed into the ocean. New research suggests rising CO2 levels in the ocean could disrupt the olfactory abilities of coho salmon.

Salmon rely on their sense of smell to track prey, find mates and navigate their way back upstream to spawn. According to the new study, published this week in the journal Global Change Biology, a compromised sense of smell would pose a serious threat to the health of salmon populations.

Lab experiments showed rising acidity levels caused by elevated CO2 levels inhibits salmon’s already vulnerable sensory-neural system.

“Our studies and research from other groups have shown that exposure to pollutants can also interfere with sense of smell for salmon,” Evan Gallagher, a professor of toxicology at the University of Washington, said in a news release. “Now, salmon are potentially facing a one-two punch from exposure to pollutants and the added burden of rising CO2. These have implications for the long-term survival of our salmon.”

Read the full story at UPI

Report finds seafood mislabeling “rampant” in New York

December 18, 2018 — The New York Attorney General’s office may take enforcement action against some supermarket chains after it found “rampant” seafood mislabeling at grocers across the state, according to a recent report.

The report, from New York Attorney General Barbara D. Underwood, found that around a quarter of the seafood sampled at New York grocery retailers was mislabeled. These findings are the result of the first major U.S. government investigation of seafood fraud at supermarket chains.

The incidence of mislabeling popular species was “rampant” among New York retailers, the Underwood’s office said in statement. For example, 27.6 percent of species sold as “wild” salmon were mislabeled, oftentimes being substituted for farmed salmon.

A significant 67 percent of red snapper samples were mislabeled, the report found. Approximately 87.5 percent of lemon sole was also discovered to be mislabeled.

“The substitutes were often cheaper, less desirable, and less environmentally sustainable species,” the AG office statement said. “This includes farm-raised salmon sold as wild salmon, lane snapper sold as red snapper, and swai sold as lemon sole.”

Ray Hilborn, a professor of marine science at the University of Washington and a member of the International Fisheries Innovation Network steering committee, said the report showed the mislabeling was at times intentional and at times accidental.

Read the full story at Seafood Source

From skiing to salmon runs, the national climate report predicts a Northwest in peril

November 27, 2018 — Climate change’s effects – among them, increasing wildfires, disease outbreak and drought – are taking a toll on the Northwest, and what’s to come will threaten and transform our way of life from the salmon streams to ski slopes, according to a new federal climate assessment released Friday.

The 1,000-plus-page report, produced by the U.S. Global Change Research Program, is the most comprehensive evaluation to date of climate change’s effects on the nation’s economy, human health, agriculture and environment. Thirteen federal agencies contributed to the report, which was required to be published by Congress.

The federal report’s stark, direct and largely negative projections are at odds with President Donald Trump’s skeptical view of climate science. But federal officials, like National Oceanic and Atmospheric Administration researcher David Easterling, left little room for ambiguity about whether climate change was real and who was causing it.

Temperature data, Easterling said, provided “clear and compelling evidence that global average temperature is much higher and rising more rapidly than anything modern civilization has experienced and that this warming trend can only be explained by human activities …”

Read the full story at The Seattle Times

ALASKA: Researchers work on better model for impact of fishery closures

November 21, 2018 — Fisheries managers are faced with a firestorm every time they decide to close a fishery because of poor returns or low population numbers. A new economic model is trying to help them see into the future to understand the effects of a closure before it happens.

Researchers from the National Oceanic and Atmospheric Administration and the University of Washington worked together on the model, finished in 2017 and published in the journal Marine Policy this past September.

It takes into account items like fishery participation, the amount of each vessel’s annual revenue that comes from the affected fishery, which vessels participate in other fisheries and the value of the fishery; the aim is to calculate the total impact when managers have to limit or close a fishery.

The origin of the idea came after a disastrous broad closure in salmon fishing on the West Coast in 2008. The closure, caused by poor salmon returns correlated to unfavorable ocean conditions, resulted in a federal disaster declaration and a $170 million relief distribution.

Had officials and fishery managers been able to estimate the impact better, relief funds might have been distributed sooner, said Kate Richerson, a marine ecologist with NOAA’s Northwest Fisheries Science Center and the lead author of the study.

Read the full story at the Alaska Journal of Commerce

 

As the guilty pleas pile up in tuna case, will consumers ever get anything back?

November 6, 2018 — First, Chicken of the Sea came forward as a whistleblower. Last year, Bumble Bee Foods pleaded guilty, followed by StarKist Co. in October.

The big three tuna companies — familiar names on the shelves of your nearest grocery store — have been under investigation by the U.S. Department of Justice for keeping the price of canned and pouched tuna artificially high.

It’s a high-level antitrust case involving lots of big companies, but it’s also the kind of case that reaches all the way down to the grocery store checkout and family budgets.

Thomas Burt, an attorney with the law firm Wolf Haldenstein Adler Freeman & Herz, said with consumer cases like this, “Psychologically, these hit home in a way that others don’t.”

“If a group of companies fix the price of basic industrial chemicals or computer chips that we use in the devices around us, the psychological distance is further. We don’t feel it as directly,” Mr. Burt said. “This is a product that people have a relationship with. They know this brand. They’ve eaten it since they were kids.

“It’s a kick in the pants for consumers,” he said.

It remains to be seen if consumers will be directly compensated in some way, and, if so, how.

The packaged seafood market, which also includes salmon, shrimp, clams and the like, is a multibillion-dollar industry in the United States. Tuna represents about 73 percent of the market and generates about $1.7 billion in annual sales, according to court documents.

Read the full story at The Pittsburgh Post-Gazette

Is a Splashy Fishing Statistic Misleading?

September 10, 2018 — How much of the world’s oceans are affected by fishing? In February, a team of scientists led by David Kroodsma from the Global Fishing Watch published a paper that put the figure at 55 percent—an area four times larger than that covered by land-based agriculture. The paper was widely covered, with several outlets leading with the eye-popping stat that “half the world’s oceans [are] now fished industrially.”

Ricardo Amoroso from the University of Washington had also been trying to track global fishing activity and when he saw the headlines, he felt that the 55 percent figure was wildly off. He and his colleagues re-analyzed the data that the Global Fishing Watch had made freely available. And in their own paper, published two weeks ago, they claim that industrial fishing occurs over just 4 percent of the ocean.

How could two groups have produced such wildly different answers using the same set of data? At its core, this is a simple academic disagreement about scale. But it’s also a more subtle debate that hinges on how we think about the act of fishing, and how to measure humanity’s influence on the planet. “I think this discussion really shows how little we know about the world’s oceans and why making data publicly available is so important for stimulating research,” says Kroodsma.

As ships traverse the oceans, many of them continuously transmit their position, speed, and identity to satellites. This automatic identification system was originally developed to prevent collisions, but by training Google’s machine-learning tools on the data, the Global Fishing Watch (GFW)—an initiative led by the nonprofits Oceana and SkyTruth—can identify different kinds of fishing vessels, and work out where they’re dropping their lines and nets.

Read the full story at The Atlantic