Duke University Archives - Saving Seafood

Where have all the right whales gone? Researchers map population density to make predictions

April 15, 2024 — Marine researchers have mapped the density of one of the most endangered large whale species worldwide, the North Atlantic right whale, using newly analyzed data to predict and help avoid whales’ harmful, even fatal, exposure to commercial fishing and vessel strikes.

Duke University’s Marine Geospatial Ecology Lab led a collaboration of 11 institutions in the United States that pooled 17 years of available visual survey data covering 9.7 million square kilometers of the U.S. Atlantic—roughly the same area as the entire contiguous United States.

This information was coupled with auditory data from almost 500 hydrophone recorders in US Atlantic waters that captured whales’ calls. Lining up visual and acoustic datasets for the first time, researchers built a statistical model to estimate the number of whales per square kilometer at different points in time. Researchers published their findings in Marine Ecology Progress Series.

“The more accurate and detailed the mapping, the better chance we have to save dwindling numbers of right whales from preventable injury and fatality,” said Patrick Halpin, director of Duke’s Marine Geospatial Ecology Lab. The lab studies marine ecology, resource management, and ocean conservation, using data to inform ocean management and governance.

Read the full article at phys.org

Right whales’ survival rates plummet after severe injury from fishing gear

June 14, 2022 — Most North Atlantic right whales that are severely injured in fishing gear entanglements die within three years, a new study led by scientists at the New England Aquarium and Duke University finds.

North Atlantic right whales are a critically endangered specieswhose population has shrunk in recent decades. Scientists estimate fewer than 350 of the iconic whales are still alive in the wild today.

To examine the role fishing gear entanglements have played in the species’ decline, the researchers tracked the outcomes of 1,196 entanglements involving 573 right whales between 1980 and 2011 and categorized each run-in based on the severity of the injury incurred

The data revealed that male and female right whales with severe injuries were eight times more likely to die than males with minor injuries, and only 44% of males and 33% of females with severe injuries survived longer than 36 months.

Read the full story at Phys.org

Will offshore wind threaten wildlife? A Duke-led team is working to find out

October 18, 2021 — A team of scientists led by Duke University researchers will set out to determine the risk offshore wind turbines could pose to birds, fish and marine mammals with the support of a U.S. Department of Energy grant.

The $7.5 million grant was awarded as federal and North Carolina officials push to scale up the offshore wind industry, with President Joe Biden setting a national goal of 30 gigawatts of wind by 2030 and N.C. Gov. Roy Cooper setting targets of 2.8 gigawatts by 2030 and 8 gigawatts by 2040.

Researchers from 15 institutions will create a tool-kit that the wind energy industry and regulators can use to figure out where wind farms should be placed and what steps should be taken to protect nearby wildlife. The Duke University grant is one of four included in the Department of Energy package.

Read the full story at the Charlotte Observer

NORTH CAROLINA: Researchers talk coastal habitat risks from sea level rise, other hazards

April 22, 2021 — Coastal habitat loss may cost North Carolinians the natural benefits the habitat provides, but researchers are working to keep decision makers informed of the risks and potential solutions.

Representatives from Pew Charitable Trusts, the N.C. Division of Marine Fisheries, Duke University and East Carolina University held an online workshop Monday discussing the hazards coastal habitat faces and how scientists and state officials are working to preserve and protect it. Pew Charitable Trusts Director Jennifer Browning said the workshop was a part of the trusts’ coastal habitat learning series and evolved from approximately three decades of fisheries management.

“It’s been wonderful to watch how the (N.C.) Coastal Habitat Protection Plan has evolved,” said Ms. Browning, who was on the team which developed the CHPP.

Duke University Nicholas Institute for Environmental Policy Solutions Ecosystem Services program director Lydia Olander said Duke researchers, in partnership with the U.S. Climate Alliance, have been taking part in a project to map the effects of sea level rise on coastal ecosystem services. She said the project focused on six Atlantic Coast states, including North Carolina.

Read the full story at the Carteret County News-Times

That Salmon on Your Plate Might Have Been a Vegetarian

March 25, 2021 — Twenty years ago, as farmed salmon and shrimp started spreading in supermarket freezers, came an influential scientific paper that warned of an environmental mess: Fish farms were gobbling up wild fish stocks, spreading disease and causing marine pollution.

This week, some of the same scientists who published that report issued a new paper concluding that fish farming, in many parts of the world, at least, is a whole lot better. The most significant improvement, they said, was that farmed fish were not being fed as much wild fish. They were being fed more plants, like soy.

In short, the paper found, farmed fish like salmon and trout had become mostly vegetarians.

Synthesizing hundreds of research papers carried out over the last 20 years across the global aquaculture industry, the latest study was published on Wednesday in the journal Nature.

Read the full story at The New York Times

4 POLICIES TO PROMOTE ‘FISH AS FOOD’ CAN FIGHT WORLD HUNGER

February 5, 2021 — “Fish have been an important source of food for humans for millennia, but seafood production and fisheries management are inexplicably still not viewed as key parts of global policies to fight hunger and promote food security,” says John Virdin, director of the Oceans and Coastal Policy Program at Duke University’s Nicholas Institute for Environmental Policy Solutions.

“This needs to change, especially as food systems worldwide face increasing threats from climate change and the global development community falls further behind in meeting its goals.”

The UN Food and Agriculture Organization estimates the number of malnourished people worldwide will increase from 678 million in 2018 to 841 million in 2030 if current trends continue.

Fish, which already account for 17% of the animal protein consumed globally, could help meet this growing need, yet current food policies and funding priorities show little recognition of this, the authors of the new paper in the journal Ambio argue.

Read the full story at Futurity

Scientists to global policymakers: Treat fish as food to help solve world hunger

January 20, 2021 — Scientists are urging global policymakers and funders to think of fish as a solution to food insecurity and malnutrition, and not just as a natural resource that provides income and livelihoods, in a newly-published paper in the peer-reviewed journal Ambio. Titled “Recognize fish as food in policy discourse and development funding,” the paper argues for viewing fish from a food systems perspective to broaden the conversation on food and nutrition security and equity, especially as global food systems will face increasing threats from climate change.

The “Fish as Food” paper, authored by scientists and policy experts from Michigan State University, Duke University, Harvard University, World Bank and Environmental Defense Fund, among others, notes the global development community is not on track to meet goals for alleviating malnutrition. According to the U.N. Food and Agriculture Organization, the number of malnourished people in the world will increase from 678 million in 2018 to 841 million in 2030 if current trends continue—an estimate not accounting for effects of the COVID-19 pandemic. Fish provide 17% of the animal protein consumed globally and are rich in micronutrients, essential fatty acids and protein essential for cognitive development and maternal and childhood health, especially for communities in developing countries where fish may be the only source of key nutrients. Yet fish is largely missing from key global food policy discussions and decision-making.

“Fish has always been food. But in this paper, we lay out an agenda for enhancing the role of fish in addressing hunger and malnutrition,” says Abigail Bennett, assistant professor in the Center for Systems Integration and Sustainability in the Department of Fisheries and Wildlife at Michigan State University. “We are urging the international development community not only to see fish as food but to recognize fish as a nutrient-rich food that can make a difference for the well-being of the world’s poor and vulnerable. What kinds of new knowledge, policies and interventions will be required to support that role for fish?” she adds.

Read the full story at PHYS.org

Artificial Reefs Take on a Towering Presence as Havens for Marine Predators

September 10, 2020 — The following was released by Duke University:

Acting like high-rise timeshares in the sea, shipwrecks and other artificial reefs can support dense populations of sharks, mackerels, barracudas, jacks and other large migratory marine predators essential to ocean health, according to a new study at 30 sites along the North Carolina coast.

Predator densities were up to five times larger at the 14 artificial reefs surveyed in the study than at the 16 nearby natural reefs that also were surveyed

Shipwrecks, especially those that rose between 4 and 10 meters up into the water column, were by far the fishes’ favorite. At some sites, they supported predator densities up to 11 times larger than natural reefs or low-profile artificial reefs made of concrete.

“These finding tell us two important things. One is that artificial reefs can support large predators, potentially supplementing natural reefs if the design and placement of the artificial reefs are strategic,” said Avery Paxton, research associate with the National Oceanic and Atmospheric Administration’s National Centers for Coastal Ocean Science (NCCOS) in Beaufort, N.C., who led the study.

“The second thing it tells us is that when it comes to designing artificial reefs, there may be such a thing as a height advantage. We observed more fast-moving predators that live and hunt in the water column at the taller reefs in our study,” she said.

Climate change, pollution, development and other stresses have accelerated the decline of natural reef ecosystems across much of the world’s oceans in recent years, forcing large predators who formerly fed in the water column around the reefs to venture outside their normal migratory routes and native ranges in search of suitable alternatives.

Because these predators help maintain healthy and sustainable populations of species lower in the food web, providing suitable habitat for them as expediently as possible is critical, said Brian Silliman, Rachel Carson Distinguished Professor of Marine Conservation Biology at Duke University’s Nicholas School of the Environment, who collaborated on the study.

Read the full release here

How Ultra-Black Fish Disappear in the Deepest Seas

July 16, 2020 — Alexander Davis admits that he can be a glutton for punishment. He staked part of his Ph.D. on finding some of the world’s best-camouflaged fishes in the ocean’s deepest depths. These animals are so keen on not being found that they’ve evolved the ability to absorb more than 99.9 percent of the light that hits their skin.

To locate and study these so-called ultra-black fishes, Mr. Davis, a biologist at Duke University, said he relied largely on the luck of the draw. “We basically just drop nets and see what we get,” he said. “You never know what you’re going to pull up.”

When he and his colleagues did cash in, they cashed in big. In a paper published Thursday in Current Biology, they report snaring the first documented ultra-black animals in the ocean, and some of the darkest creatures ever found: 16 types of deep-sea fish that are so black, they manifest as permanent silhouettes — light-devouring voids that almost seem to shred the fabric of space-time.

“It’s like looking at a black hole,” Mr. Davis said.

To qualify as ultra-black, a substance has to reflect less than 0.5 percent of the light that hits it. Some birds of paradise manage this, beaming back as little as 0.05 percent, as do certain types of butterflies (0.06 percent) and spiders (0.35 percent). A feat of engineering allowed humans to best them all with synthetic materials, some of which reflect only 0.045 percent of incoming light. (“Black” paper, on the other hand, returns a whopping 10 percent of the light it meets.)

Read the full story at The New York Times

Fishy stat: Elizabeth Warren goes overboard with claim on re-imported fish

December 19, 2019 — The first quick-fire question Tonight Show host Jimmy Fallon put to Elizabeth Warren Dec. 5 was, “What is the most important issue facing American voters today?”

“Corruption,” Warren fired back.

That fits well with her campaign message that big corporations and the uber-rich have wormed their way into the corridors of power in Washington.

But Warren has another bit of fishy business on her mind.

In a Dec. 10 policy brief, she laid out plans to leverage the power of the oceans to fight climate change and boost jobs in the fishing industry. Among her points, Warren said America had offshored too much of the fish processing business.

“We must also rebuild the necessary infrastructure to once again support vibrant coastal communities and a local seafood economy,” Warren said. “Today, roughly one in four fish eaten in the United States was caught here and sent to Asia for processing before being re-imported for American consumers. By building processing plants in the United States, we can not only decrease the carbon footprint of the seafood industry, but we can also create a new class of jobs in the Blue Economy.”

Dare we say, that 1-in-4 statistic had us hooked.

We got in touch with the fishery researchers who wrote the paper Warren used to support her assertion. They said they didn’t offer that stat, and while they don’t have an exact estimate, her figure is probably too high.

Read the full story at PolitiFact