Saving Seafood

Scallop fishery may be imperiled by acidic seas

October 16, 2018 — Increasingly acidic seas pose a serious threat to the sea scallop fishery, a recent collaborative study by the University of Virginia, the Ocean Conservancy, the NOAA Northeast Fisheries Science Center, and the Woods Hole Oceanographic Institution (WHOI) concluded.

“As levels of carbon dioxide increase in Earth’s atmosphere, the oceans become increasingly acidic — a condition that could reduce the sea scallop population by more than 50 percent in the next 100 years under a worst-case scenario,” the study states. Models from the study, which were published recently in the journal PLOS One, combine existing data with several factors that impact the fishery: “future climate change scenarios, ocean acidification impacts, fisheries management policies, and fuel costs for fishermen.” Those factors were modeled out into 256 different possibilities.

Oceans absorb vast quantities of carbon dioxide. Fossil fuel emissions exacerbate what the oceans take in, further acidifying the water. “That acidity can corrode the calcium carbonate shells that are made by shellfish like clams, oysters, and scallops, and even prevent their larvae from forming shells in the first place,” the study states.

“[The scallop fishery is] healthy and valuable today in part because it is very well managed,” says Scott Doney, a co-author from WHOI and the University of Virginia. “We also used the model to ask whether management approaches could offset the negative impacts of ocean acidification.”

It couldn’t. In every scenario, elevated carbon dioxide levels created acidiferous ocean water. The culprit, the study concluded, was “unabated carbon emissions.”

Read the full story at the MV Times

MASSACHUSETTS: Falmouth and New Bedford Battle Across Buzzards Bay for NOAA Headquarters

October 15, 2018 — A dispute across Buzzards Bay may break out between Falmouth and the City of New Bedford.

The Falmouth Board of Selectmen has been working to keep the National Oceanographic and Atmospheric Administration’s Northeast Fisheries Science Center in Woods Hole.

Other elected officials in the area have also been lobbying for NOAA to keep the Northeast Fisheries Science Center in Woods Hole for weeks.

In late September, Falmouth selectmen teamed up with Barnstable County state representatives and state senators, area chambers of commerce, directors from the Woods Hole Oceanographic Institution (WHOI), the Marine Biological Laboratory, and the Woods Hole Research Center to pen a letter to the federal agency urging them to stay put in the small section of Falmouth.

Operations Chief of the NOAA Fisheries Science Center Garth Smelser responded to that letter, and met with Falmouth and Barnstable County officials on Friday to discuss the possible move.

“For almost 150 years we’ve been studying fish, marine mammals, sea turtles, seabirds and the marine environments that sustain them, and right here in Barnstable County we have over 300 employees and contractors that complete that work. The Fisheries Commission started right here in our community. We’ve been doing wonderful marine science for those 150 years,” Smelser told elected officials. “Yes, we are very proud of our presence in Woods Hole, but we’re much bigger than just Woods Hole. We have 225 federal staff and 165 contract staff spread around the east coast from Orono, Maine all the way down to Sandy Hook, New Jersey. The majority of our folks are centered in Woods Hole, but we’re just as proud of our other people.”

Read the full story at CapeCod.com

New Study Shows Climate Change Could Reduce Scallop Population

October 3, 2018 — Researchers in Massachusetts say under the worst case scenario, climate change could reduce the scallop population by more than 50 percent in just a few decades, which could be bad news for New Bedford’s lucrative fishing port.

In 2016, commercial fishermen landed more than $300 million worth of fish at the Port of New Bedford, and 85 percent of that value came from scallops.

A new study from Woods Hole Oceanographic Institution shows as carbon emissions in the atmosphere increase, so does the acidity in the ocean.

Jennie Rheuban, lead author of the report, said that could affect how well scallops can grow.

“Adults may actually be growing slower and calcifying less quickly under these acidified conditions because it’s more difficult for them to lay down calcium carbonate as a shell,” Rheuban said.

Rheuban said ocean acidification could also cause scallops to become more vulnerable.

“They aren’t able to swim quite as well when they’re experiencing acidified conditions, and so we hypothesize that under acidification, scallops may be more susceptible to predation,” she said.

Read the full story at Rhode Island Public Radio

New model looks at ocean acidification and sea scallop population drop

September 28, 2018 — Scientists at the University of Virginia and the Woods Hole Oceanographic Institution have created a new model looking at ocean acidification.

According to a release, fishermen harvest more than $500 million worth of Atlantic sea scallops each year off the East Coast, but this model predicts those fisheries may be in danger.

It says, as the levels of carbon dioxide increase in the atmosphere, the oceans become increasingly acidic, which could reduce the sea scallop population by more than 50 percent in the next 100 years, as a worst-case scenario.

The researchers say strong fisheries management and efforts to reduce CO2 emissions might slow or potentially even stop the trend.

“Rising atmospheric carbon dioxide levels pose a threat to many types of marine life, particularly shellfish,” said Scott Doney, an environmental sciences professor at UVA. “The ocean removes about a quarter of the carbon dioxide humans release to the atmosphere each year from fossil fuel use and deforestation. The resulting acidification of seawater makes it more difficult for shellfish like scallops and clams to build and maintain their shells.”

There are currently no studies that have been published showing the specific effects of ocean acidification on the Atlantic sea scallop, so to estimate the impact, Doney and his colleagues used a range of effects based on studies of related species.

The release says the new models lets scientists explore how plausible impacts of ocean acidification may change the future of the scallop population.

The researchers tested four different levels of impact on each of four different factors in the model, creating 256 different scenario combinations.

Read the full story at WCAV

WHOI Warns Sea Scallop Fisheries of Rises in Ocean Acidification

September 26, 2018 — More than $500 million worth of Atlantic sea scallops are harvested off the east coast of the United States.

Scientists at the Woods Hole Oceanographic Institution (WHOI), however, warn that fisheries bringing in this massive catch might be in danger because of carbon-dioxide levels increasing in the Earth’s atmosphere, causing the upper oceans to become increasingly acidic.

“What’s novel about our work is that it brings together models of changing ocean environments as well as human responses. It combines socioeconomic decision making, ocean chemistry, atmospheric carbon dioxide, economic development and fisheries management, said the study’s lead author Jennie Rheuban.

“We tried to create a holistic view of how environmental changes might play out across different aspects of the sea scallop fishery.”

The scientists say the condition could reduce the sea scallop population by more than 50-percent within the next 30 to 80 years.

The predictions were made using a model created by WHOI scientists, which combines existing data and models of four major factors: future climate change scenarios, ocean acidification impacts, fisheries management policies, and fuel costs for commercial fishermen.

WHOI says that the ocean absorbs more than a quarter of all carbon dioxide in the atmosphere. They say that the acidity caused by this can corrode the shells of clams, oysters, and scallops, and event prevent their larvae from forming shells at all.

Read the full story at CapeCod.com

Researchers Studying What Climate Change Could Mean for Fisheries in the Northeast

September 25, 2018 — SEAFOOD NEWS — Researchers with the Northeast Fisheries Science Center are studying warming ocean waters in an effort to understand what climate change could mean for “future stock conditions and the fisheries that depend on them.”

Congress recently provided the Northeast Fisheries Science Center with funding for a fisheries climate action plan that they released in 2016. Thanks to the funding, the Science Center now has 10 projects underway to “improve stock assessments through new modeling, better surveys, and more work to understand the vulnerabilities of coastal communities to climate change.”

The Science Center is working with fishermen, along with the Woods Hole Oceanographic Institution, the University of Massachusetts Dartmouth, State University of New York Stony Brook, Rutgers University Department of Marine and Coastal Sciences, Massachusetts Division of Marine Fisheries, NOAA Earth Systems Research Laboratory, NOAA Geophysical Fluid Dynamics Laboratory, NOAA Ocean and Atmospheric Research, Gulf of Maine Research Institute and Delaware Sea Grant.

A list of the stock assessment projects, survey projects, modeling projects and social science projects can be found here.

This story was originally published on SeafoodNews.com, a subscription site. It is reprinted with permission.

Ocean acidification may reduce sea scallop fisheries

September 24, 2018 — Each year, fishermen harvest more than $500 million worth of Atlantic sea scallops from the waters off the east coast of the United States. A new model created by scientists at the Woods Hole Oceanographic Institution (WHOI), however, predicts that those fisheries may potentially be in danger. As levels of carbon dioxide increase in the Earth’s atmosphere, the upper oceans become increasingly acidic—a condition that could reduce the sea scallop population by more than 50% in the next 30 to 80 years, under a worst-case scenario. Strong fisheries management and efforts to reduce CO2 emissions, however, might slow or even stop that trend.

The , published in the journal PLoS One, combines existing data and models of four major factors: future climate change scenarios, ocean acidification impacts,  policies, and fuel costs for fishermen.

“What’s novel about our work is that it brings together models of changing ocean environments as well as human responses” says Jennie Rheuban, the lead author of the study. “It combines socioeconomic decision making, ocean chemistry, atmospheric carbon dioxide, economic development and fisheries management. We tried to create a holistic view of how environmental changes might play out across different aspects of the  fishery,” she notes.

Read the full story at PHYS.org

 

WHOI Center for Oceans and Human Health to Receive $6.9M in Grant Funding

September 19, 2018 — WOODS HOLE, Mass. — The Woods Hole Oceanographic Institution will receive nearly $7 million in grant funding to continue the operation of its Woods Hole Center for Oceans and Human Health.

The collaborative award from the National Science Foundation and National Institute of Environmental Health Sciences will be dispersed over 5 years.

The funding will benefit three centers and four projects aimed at improving public health by investigating the ways oceanic processes affect the distribution and persistence of human pathogens or the products of toxin-producing algae.

“These projects bring together scientists doing basic research on the oceans and Great Lakes with those in biology and human health to study processes that affect millions of people,” said Hedy Edmonds, a program director in NSF’s Division of Ocean Sciences, which co-funded the awards.

Read the full story at CapCod.com

 

Senate Panel Told Nation’s Algae Woes Will Worsen If Not Addressed

August 29, 2018 — WASHINGTON — The spread of toxic algal blooms in the nation’s waterways – largely caused by a combination of warming water, contaminant run off and “supercharged bacteria” – won’t stop anytime soon, one scientist told lawmakers Tuesday.

During a Senate Commerce, Science and Transportation subcommittee hearing, scientist Donald Anderson of the Woods Hole Oceanographic Institution in Massachusetts, told lawmakers that after 40 years of study on toxic blooms, he is convinced that the outbreaks will only persist and worsen if left unaddressed.

The blooms vary greatly in composition and color; some are red, some green, and others gold.

In freshwater, the blooms are typically caused when simple algae collides with cynobacteria, or blue-green algae.

While some algae growth can be beneficial and the exact causes for emergent blooms vary in both fresh and marine water, Anderson said, it is climate change which will “almost certainly” continue to influence the pervasiveness of dangerous algal build up.

Read the full story at Courthouse News Service

 

Woods Hole Researchers Combine Fisheries and Acoustics for Sea Project

August 17, 2018 — A research project led by the Woods Hole Oceanographic Institution is underway off the coast of Alaska.

The Beaufort Shelf Break Ecology Cruise will combine oceanography, biology and fisheries science to learn more about the shelf’s nutrient rich waters.

Researchers will measure ocean temperatures and currents, collect plankton and fish and use sonar systems to look at fish distribution and what they are eating.

Read the full story at CapeCod.com