Saving Seafood

Scallop study sheds light on gear choice for Maine growers

April 15, 2025 — A recent study from the University of Maine’s Aquaculture Research Institute and Darling Marine Center is offering Maine scallop farmers practical insights into gear selection and its impact on growth and profitability.

The research published in Aquaculture and reported by the Penobscot Bay Pilot compared two common farming methods- lantern nets and ear-hanging- across a full grow-out cycle in Penobscot Bay and Frenchman Bay.

According to Science Daily, suspended culture is the most common approach, with farmers typically using multi-tiered lantern nets to grow scallops to a harvestable size. UMaine shares that ear-hanging, a technique adapted from Japanese scallop farming, offers a potential alternative. This method involves drilling a small hole in the scallop’s shell and suspending it on a line, allowing for better water flow and potentially reducing maintenance needs.

Read the full article at National Fisherman

NOAA closes Northern Gulf of Maine Scallop Management Area midseason

April 11, 2025 — The National Oceanic and Atmospheric Administration shut down the Gulf of Maine’s scallop fishery Friday.

“As of April 11, 2025, no scallop vessel fishing under federal scallop regulations may fish for, possess, or land scallops in or from the Northern Gulf of Maine Scallop Management Area,” NOAA’s announcement reads. “The scallop regulations require that we close this area once we project that 100% of the 2025 Northern Gulf of Maine Set-Aside will be taken.”

Members of Maine’s fishing industry have been anticipating the closure, saying regulators delayed finalizing this year’s catch limits amid their transition to the Trump Administration.

“It hasn’t been as easy to get information this year from NOAA fisheries,” said Togue Brawn, a Member of the New England Fishery Management Council and the founder of Downeast Dayboat and Dayboat Blue. “As we know, things are changing with the government, people are getting fired, people are afraid to talk. It’s a little dystopian, and frankly unsettling, and it does a disservice to the fishermen and the employees that are there trying to manage the fishery.”

The fishery shuts down every year once projections show the allowed set-aside for the year will be met, but this closure marks the first time NOAA has closed the fishery in the middle of the season — which some believe poses uncertainty for fishermen who traveled to the southern reaches of the Gulf of Maine fishing area off of Massachusetts.

Read the full article at Spectrum News

MAINE: Students help scientists count baby scallops

April 10, 2025 — Students from Deer Isle-Stonington High School, all members of the Eastern Maine Skippers Program, gathered on April 4 at the Maine Center for Coastal Fisheries in Stonington to count scallop spat in an effort to predict where beds of the bivalve mollusk might appear.

Spat is the term researchers use to describe post-larval, or juvenile, scallops. These tiny creatures, measuring roughly 1/8 inch, will mature over time into the delicious scallops treasured by diners.

The spat, members of the species Plactopecten magellanicus, or Atlantic deep-sea scallop, are found from North Carolina to the Gulf of St Lawrence. Local scallops are either harvested in the wild near shore or raised in one of several local aqua farms in and around Penobscot Bay.

Read the full article at Penobscot Bay Press

Gulf of Maine scallop fishery likely to close for first time in over 15 years

April 10, 2025 — Fishermen are likely to be restricted from hauling scallops from federal waters in the Gulf of Maine for several weeks because regulators have delayed finalizing annual catch limits.

The temporary closure, expected in the next five days, would mark the first time the National Oceanic and Atmospheric Administration has shut down the regional fishery midseason since the regulations were put into place 16 years ago. Those who dive for scallops near Maine’s coast are unaffected; federal waters begin 3 miles offshore.

NOAA typically passes annual rules by April 1, when the federal scalloping season kicks off. But without them, there is a stopgap measure in place that permits a limited amount of fishing. That limit has almost been reached.

Members of Maine’s fishing community say regulators at NOAA Fisheries have been challenged by the transition to a new presidential administration, a typical problem, and the federal staffing cutbacks that are part of President Donald Trump’s initiative to slash government spending.

Read the full article at the Portland Press Herald 

UMaine research examines best methods for growing Atlantic sea scallops

April 9, 2025 — A new study from the University of Maine’s Aquaculture Research Institute and Darling Marine Center is helping to refine best practices for growing Atlantic sea scallops, a species of increasing interest to Maine’s aquaculture sector.

Published in the academic journal Aquaculture, the research compares two scallop farming methods, ear-hanging and lantern net culture, over a complete grow-out cycle to determine which approach yields the best results for commercial growers. The study, led by UMaine postdoctoral researcher Christopher Noren, provides new insights into how each method influences scallop size and adductor muscle weight, a key factor in market value.

Read the full article at Seacoastonline

UMaine research examines best methods for growing Atlantic sea scallops in Penobscot and Frenchman bays

April 7, 2025 — A new study from the University of Maine’s Aquaculture Research Institute and Darling Marine Center is helping to refine best practices for growing Atlantic sea scallops (Placopecten magellanicus), a species of increasing interest to Maine’s aquaculture sector.

Published in the academic journal Aquaculture, the research compares two scallop farming methods, ear-hanging and lantern net culture, over a complete grow-out cycle to determine which approach yields the best results for commercial growers, according to a news release from UMaine.

The study, led by UMaine postdoctoral researcher Christopher Noren, provides new insights into how each method influences scallop size and adductor muscle weight, a key factor in market value.

Evaluating Two Common Farming Methods

Maine’s scallop aquaculture industry is still in its early stages, and growers are looking for efficient ways to scale up production. Suspended culture is the most common approach, with farmers typically using multi-tiered lantern nets to grow scallops to a harvestable size. However, this method requires frequent maintenance to manage biofouling — an unwanted accumulation of microorganisms, plants and animals — and to optimize growth conditions.

Ear-hanging, a technique adapted from Japanese scallop farming, offers a potential alternative. This method involves drilling a small hole in the scallop’s shell and suspending it on a line, allowing for better water flow and potentially reducing maintenance needs.

To evaluate the effectiveness of each method, researchers partnered with two commercial scallop farms in Maine’s Penobscot Bay and Frenchman Bay. Over four years, they measured scallop growth and the weight of their adductor muscles, the primary product from scallops that are sold in U.S. seafood markets.

Read the full article at Penobscot Bay Pilot

Research examines best methods for growing Atlantic sea scallops

April 1, 2025 — A new study from the University of Maine’s Aquaculture Research Institute (ARI) and Darling Marine Center is helping to refine best practices for growing Atlantic sea scallops (Placopecten magellanicus), a species of increasing interest to Maine’s aquaculture sector.

Published in the academic journal Aquaculture, the research compares two scallop farming methods, ear-hanging and lantern net culture, over a complete grow-out cycle to determine which approach yields the best results for commercial growers. The study, led by UMaine postdoctoral researcher Christopher Noren, provides new insights into how each method influences scallop size and adductor muscle weight, a key factor in market value.

Evaluating two common farming methods

Maine’s scallop aquaculture industry is still in its early stages, and growers are looking for efficient ways to scale up production. Suspended culture is the most common approach, with farmers typically using multi-tiered lantern nets to grow scallops to a harvestable size. However, this method requires frequent maintenance to manage biofouling—an unwanted accumulation of microorganisms, plants and animals—and to optimize growth conditions.

Read the full article at the phys.org

MASSACHUSETTS: State allows scallop season extension

April 1, 2025 — Nantucket scallopers will have an extra 11 days to rake in bay scallops thanks to the state Division of Marine Fisheries OKing an extension of the season requested by the Select Board last month.

Both recreational and commercial scalloping season were set to end Monday but state environmental officials granted an extension to April 11 because there are plenty of scallops left in the harbor that will likely die before next year if not caught, Division of Marine Fisheries director Daniel McKiernan wrote in a letter to the Select Board Friday.

The state conducted a bay scallop resource investigation of Nantucket Harbor last week and determined that, “in proportion to immature seed bay scallops there is an abundance of adult bay scallops that will not be harvested prior to the termination of the normal bay scallop season,” McKiernan wrote. “It is believed that most of these adult scallops are unlikely to live long enough to spawn again this coming summer.”

“These adult scallops need to be fished and the fishermen really deserve to have these extra days. And I’m sure the general public will enjoy having fresh scallops available to them for a little bit longer,” Harbor and Shellfish Advisory Board chair Andy Lowell said last month when asking the Select Board to petition the state for the extension.

He noted at that time that there were plenty of scallops and not many fishermen catching them.

Breathing in Climate Change: International Collaboration to Study Sea Scallops in a Changing Environment

November 14, 2024 — The following was released by NOAA Fisheries:

In September 2024, my colleague Shannon Meseck and I took a road trip up north to Canada, to visit a research lab in St. Andrews, New Brunswick. The St. Andrews Biological Station is a part of Fisheries and Oceans Canada, the Canadian equivalent to NOAA Fisheries. Though the oldest of Canada’s Atlantic research facilities, the lab features state-of-the-art seawater systems with capacity to do climate and aquatic research.

This project was a transboundary collaboration with climate scientist Helen Gurney-Smith to study climate change stressors on Atlantic sea scallop larvae. It was funded by the NOAA Ocean Acidification Program. The larval period, typically the first 3 weeks of a sea scallop’s life, is particularly challenging for bivalve shellfish because they are planktonic, or free-floating in the water column. During this period, larvae are subject to heavy predation and are transported through ocean currents. The water they are exposed to is constantly changing with environmental conditions, and pulses of warm and/or low pH water are becoming more common with climate change.

One way we can test how larvae respond to changes in environmental conditions is by measuring their respiration rate. As with all animals, sea scallops breathe oxygen and release carbon dioxide. The oxygen they breathe is dissolved in seawater, and we can measure the drop in the oxygen concentration of that water over time with specialized equipment known as respiration chambers. Changes in respiration rate indicate physiological stress. We hypothesized that respiration rate may change when sea scallop larvae are exposed to non-ideal seawater conditions.

Read the full article at NOAA Fisheries