Saving Seafood

Lobster research explores ocean warming effects

February 22, 2021 — A team of researchers from the University of Maine’s Darling Marine Center in Walpole and Bigelow Laboratory for Ocean Sciences in East Boothbay and the Maine Department of Marine Resources in West Boothbay Harbor recently published their research on the effects of ocean warming and acidification on gene expression in the earliest life stages of the American lobster.

The work was published in the scientific journal Ecology and Evolution with collaborators from the University of Prince Edward Island and Dalhousie University in Canada.

The team’s experiments examined the gene regulatory response of post-larval lobsters to the separate and combined effects of warming and acidification anticipated by the end of the 21st century. They found that genes regulating a range of physiological functions, from those controlling shell formation to the immune response, are either up- or down-regulated. Importantly, they observed that the two stressors combined induced a greater gene regulatory response than either stressor alone.

Read the full story at The Ellsworth American

Research illuminates lobsters’ genetic response to changing climate

January 29, 2021 — The American lobster, which supports the most valuable fishery in North America, may be more susceptible to the effects of climate change than previously thought, according to a new study published in Ecology and Evolution. This finding could help fishery managers anticipate the long-term effects of climate change for one the nation’s most precious natural resources.

The American lobster’s range extends from Atlantic Canada to the mid-Atlantic waters of the United States, but increased carbon dioxide emissions by humans are warming and acidifying their ocean habitat.

To date, studies of the early life stages of lobsters have concluded that ocean acidification, compared to warming, had relatively limited impact on growth and metabolism. However, according to the new publication, their genes tell a different story.

“Our study indicated that acidification is affecting these lobsters on a molecular scale,” said Maura Niemisto, lead author and research associate at Bigelow Laboratory for Ocean Sciences. “Because of , they have genes firing at an even higher rate.”

Read the full story at PHYS.org

MAINE: Microplastics are harming the Gulf of Maine’s baby lobsters, study finds

July 14, 2020 — A study by scientists at a marine research laboratory indicates that plastic pollution in the Gulf of Maine likely is creating problems for the lobster population.

Researchers at Bigelow Laboratory for Ocean Sciences in Boothbay examined how microplastics — pieces of plastic broken down into tiny particles — affect lobster larvae in the gulf. They found that lobster larvae, which float in the water column and typically are found in shallow water, get fibers caught under their shells and sometimes ingest particles.

The issue of pollution in the Gulf of Maine, where millions of pounds of lobster fishing gear is deployed each year, has environmental and economic implications for Maine. The commercial statewide lobster harvest in 2019 alone accounted for more than $485 million in fishing revenue in the state, nearly three-quarters of all of Maine’s fisheries landings value that year.

The study, published in the scientific journal Marine Pollution Bulletin, showed young larvae are more likely to get microplastic fibers trapped under their shells that protect their gills, and were the least likely to survive heavy concentrations of microplastics. Older larvae had less fiber accumulation under their shells but were shown to ingest the plastic, which could pose health consequences as they get older.

Read the full story at the Bangor Daily News

Maine to collect ocean acidification data with new sensors

May 26, 2020 — Maine marine officials said three new sensors installed in a coastal community will help scientists get a better understanding of ocean acidifcation.

The growing acid levels in the ocean are a hazard for some kinds of sea life, including some of those sought by Maine fishermen. Scientists have linked acidification to factors that also drive climate change.

The Maine Department of Marine Resources said it has installed the three sensors in Boothbay Harbor. The department said the sensors will help researchers get a better understanding of how ocean acidification and dissolved oxygen levels can change the health of the state’s marine life and ecosystems.

Read the full story at the Associated Press

University of New England Shares NSF Grant on Lobsters and Climate Change

April 7, 2020 — A study on how warming ocean water impacts the early life stages of lobster will bring together two undergraduate colleges, a premier research institution, and a state agency.

The University of New England applied for the $860,000 grant from the National Science Foundation (NSF) and intends to share it with Hood College in Maryland, Bigelow Laboratory for Ocean Sciences, and the Maine Department of Marine Resources.

Read the full story at Seafood News

Warming Gulf of Maine waters may be stunting lobster growth

April 2, 2020 — The Gulf of Maine is warming faster than 99% of the world’s oceans. And the trend may be having an impact on Maine’s most valuable commercial fishery, if temperature affects lobster larvae and their success in growing to adulthood, scientists say.

The University of New England in Biddeford, Bigelow Laboratory for Ocean Sciences in East Boothbay, the Maine Department of Marine Resources and Hood College in Frederick, Md., have received an $860,000 grant from the National Science Foundation to study that impact.

“We’ll be studying how temperature influences how larvae settle, where they settle and how successfully they settle,” Markus Frederich, a UNE marine science professor helping to lead the project, said in a news release Tuesday. “The findings of this project will help us make more specific predictions of how many lobsters there will be in the Gulf of Maine in the future.”

Maine’s lobster catch was valued at $485.4 million last year, when Maine lobster harvesters landed 100.7 million pounds. It was a 17% decline compared with 2018, but landings still topped the 100-million-pound mark for the ninth year in a row.

Read the full story at MaineBiz

Can kelp help protect shellfish from ocean acidification?

February 27, 2020 — Marine scientist Susie Arnold of the Island Institute will discuss research about kelp farming and ocean acidification Monday, March 9 at 5 p.m. at the MDI Biological Laboratory, as part of the laboratory’s Science Café series.

Maine’s scenic coastlines and long-established fisheries contribute to the state’s economy, making Maine vulnerable to the effects of ocean acidification from both an environmental and socio-economic perspective.

To address this vulnerability, Maine was the first East Coast state to convene a legislatively established commission, tasked with understanding increased ocean acidification and the potential impacts on commercially important species.

Arnold has been part of a joint research effort, undertaken by Island Institute, Bigelow Laboratory for Ocean Sciences and aquaculture industry collaborators, to better understand the role of growing and harvesting macroalgae in capturing carbon, and to determine potential benefits of co-cultivating kelp or other macrophytes alongside farmed shellfish.

Read the full story at the Mount Desert Islander

Maine Scientist: Climate Change Is Driving Corals To Cooler Waters. Will They Survive?

July 12, 2019 — Climate change is causing a significant shift in coral reef populations as warmer ocean waters drive them away from the equator, a new scientific study has found.

The study, published this month in the journal Marine Ecology Progress Series, found that young corals on tropical reefs have declined 85 percent over the past four decades, while they have doubled in subtropical waters.

Climate change is the “greatest global threat” to coral reefs as mass coral bleaching and disease outbreaks become more common as the ocean warms, according to the National Oceanic and Atmospheric Administration. But as the coral reefs come under increasing pressure from climate change, they are finding new opportunities to thrive in a changing ocean environment.

“Climate change seems to be redistributing coral reefs, the same way it is shifting many other marine species,” said Nichole Price, a senior research scientist at Maine’s Bigelow Laboratory for Ocean Sciences and the lead author of the paper. “The clarity in this trend is stunning, but we don’t yet know whether the new reefs can support the incredible diversity of tropical systems.”

Read the full story at Maine Public

Scientists Sound Alarm After 6 Rare Whale Deaths in a Month

July 5, 2019 — A half-dozen North Atlantic right whales have died in the past month, leading scientists, government officials and conservationists to call for a swift response to protect the endangered species.

There are only a little more than 400 of the right whales left. All six of the dead whales have been found in the Gulf of St. Lawrence off Canada, and at least three appear to have died after they were hit by ships.

The deaths have led scientists to sound the alarm about a potentially catastrophic loss to the population. The deaths are especially troubling because they include females, said Philip Hamilton, research scientist with the Anderson Cabot Center for Ocean Life at the New England Aquarium.

“If we’re going to have deaths, they just can’t be female,” Hamilton said, adding the population is down to only about 100 reproductive females. “We need a different system.”

Right whales have suffered high mortality and poor reproduction in recent years, particularly in 2017. The whales appear to be traveling in different areas of the ocean than usual because of food availability, said Nick Record, senior research scientist at Bigelow Laboratory for Ocean Sciences in Maine.

Read the full story from the Associated Press at The New York Times

Warmed waters linked to diminished food for right whales

June 4, 2019 — Overheated waters pouring into the Gulf of Maine from deep ocean reserves along the Atlantic coast appear to be diminishing the food supply on which North Atlantic right whales rely.

A new report from Oceanography says warming temperatures in the gulf are impacting densities of zooplankton, which the whales rely on for food.

The rapid pace of change near the Bay of Fundy, in particular, now indicates that traditional methods of protecting the whales, including protecting their decadeslong feeding areas, may need to be refined.

“Climate change is outdating many of our conservation and management efforts,” said the report’s lead author, Nicholas Record, a senior research scientist at the Bigelow Laboratory for Ocean Sciences in East Boothbay, Maine.

Read the full story at the Cape Cod Times