Saving Seafood

Scientists hope DNA in water could be way to save rare Maine fish

February 11, 2019 — Scientists in Maine are using DNA to try to preserve the remaining populations of a fish that lives in 14 lakes and ponds in the state and nowhere else in the continental United States.

The scientists are turning their eye to the Arctic charr, which is a species of landlocked fish in Maine that has lived in the state for millennia and is prized by anglers. The charr face threats such as invasive predators and a warming climate. They are also notoriously elusive, making them difficult for researchers to track.

Michael Kinnison, a professor of evolutionary applications at University of Maine, and other scientists are working with the state to make sure the fish keep surviving. Kinnison is working on a project to collect “environmental DNA” from the water bodies where the fish live.

The project involves collecting water samples from the lakes and ponds where the fish are known to live, and studying DNA that they and other organisms shed, Kinnison said. It’ll provide vital information scientists can use to keep charr populations stable, he said.

Read the full story from the Associated Press at Boston.com

NOAA Seeking Volunteers in Tagging Tuna

February 8, 2019 — The National Oceanic and Atmospheric Administration (NOAA) is looking for help in tagging tuna.

The Atlantic Ocean Tropical Tuna Tagging Program was established by the International Commission for the Conservation of Atlantic Tunas in 2015 to study key aspects of bigeye, skipjack, and yellowfin tuna in the Atlantic Ocean.

As part of the AOTTP, Dr. Walt Golet from the University of Maine and the Gulf of Maine Research Institute will be working with colleagues at the New England Aquarium, University of Massachusetts Dartmouth, Massachusetts Division of Marine Fisheries, University of Miami, and NOAA Fisheries to deploy 5,000 conventional tags on tuna in the western North Atlantic Ocean.

The effort will stretch from Canada to Venezuela and also includes the Gulf of Mexico and the Caribbean.

Those interested in participating in the AOTTP project and would like to volunteer to tag bigeye, skipjack, and yellowfin tuna, can contact Dr. Walt Golet at walter.golet@maine.edu.

NOAA says every fish tagged will give participants a chance to win one of 20 individual cash prizes, totaling more than $39,000, to be awarded at the end of the project.

Read the full story at CapeCod.com

Maine fisheries and blueberries could be at stake due to climate change, report says

November 29, 2018 — Climate change has helped Maine’s lobster yield increase fourfold since the 1980s, as warming waters to the south have propelled lobsters north in search of colder waters. But if summer sea temperatures along Maine’s coast continue rising and cross a potentially perilous threshold, lobsters’ survival in a more temperate Gulf of Maine could be in doubt.

The Gulf of Maine has warmed faster than 99 percent of the world’s oceans, and the trend is expected to continue. The warming that has taken place so far, as well as the decline of cod, has proven favorable for Maine’s lobster yields in recent years, but if sea temperatures during the summer rise above 68 degrees Fahrenheit, lobster mortality will increase.

That’s one conclusion from a new report detailing the potential effects of climate change on Maine’s coast. The report, released earlier this month by the Climate Change Institute at the University of Maine, took a close look at how climate change could affect fishing and agriculture. It imagines five climate change scenarios, how they would unfold over the next two decades and the impacts from each one.

The report by Paul Mayewski, the institute’s director, and Maine State Climatologist Sean Birkel predicts an overall trend of warmer, wetter weather with rising sea temperatures, shorter winters, longer summers and more frequent storms.

These predictions are in line with the National Climate Assessment that the Trump administration published the day after Thanksgiving and came a week after Mayewski and Birkel’s report. The national assessment predicts an increase in extreme weather events due to climate change, and major economic losses and heightened health risks as a result.

A global or national climate change assessment might not be applicable to all states or even regions within a state, however, which is why UMaine’s Climate Change Institute has focused on specific regions of Maine, Mayewski said. Mayewski and Birkel used past climate change data collected through Birkel’s Climate Reanalyzer tool to make predictions about coastal Maine’s climate future, and they plan to do the same for other regions in the state.

“Our goal through reports like this is to give people a better idea of how the climate has changed in the past few decades, and understanding what the plausible scenarios are for future climate and how this might impact, in this case, fisheries and blueberries,” Mayewski said.

Read the full story at the Bangor Daily News

UMaine Coastal Maine Climate Futures report issued

November 28, 2018 — Climate change means Mainers can expect to see significant environmental changes in the next two decades and they should start to prepare by planning now, University of Maine researchers say.

Using weather data dating back more than a century — to 1895 — UMaine researchers are able to track climate change and predict what the state may see in the future.

The purpose of the report is to provide both an overview of Maine’s historical climate but to provide plausible climate scenarios for the next 20 years,” said Sean Birkel, a UMaine research assistant professor and Maine State Climatologist.

Birkel and Paul Mayewski, director of the Climate Change Institute, created the Coastal Maine Climate Futures report to help prepare Mainers for what they call “significant environmental changes” on the horizon.

Since January 1895, the average coastal temperature in Maine and the sea surface temperature have both increased by 3 degrees, and rainfall has increased by around six inches.

That’s been great for some industries, like agriculture and lobster in the Gulf of Maine, which have increased four-fold since the 1980s, but not so great for others, including the cod fisheries because cod cannot tolerate the warmer temperatures.

“All of this is the human impacts,” Birkel said.

The melting of the polar ice cap, which is due to increased greenhouse gas emissions, and increases in the frequency of El Nino warm and dry weather conditions, are key factors in the warming trend for Maine.

“In these images, we see how the end of summer Arctic sea ice extent has changed — 1980 on the left and 2016 on the right,” Birkel said pointing to images of ice on the northern pole.

“So as Arctic sea ice declines… It’s affecting the weather because there is more open ocean water, there is more absorption of heat,” he said. “There is also more heat exchange between the ocean and the atmosphere.”

Read the full story at WVFX

Here’s how $1.4M in NOAA grants will be used to help Maine’s fishing industry

October 25, 2018 — Sea lice infestation costs the salmon aquaculture industry an estimated at $15 million annually in the United States and $740 million globally — and remains the greatest barrier to continuing and expanding salmon aquaculture in the oceans.

That’s the industry context underscoring the relevance of the $725,365 grant awarded to a University of Maine team to study potential new treatments for sea lice infestation.

The grant is one of two to UMaine that were announced recently by National Sea Grant College, a program of the National Oceanic and Atmospheric Administration. Both projects are expected to further advance the development of a sustainable marine and coastal aquaculture industry in the United States, according to a NOAA news release.

Heather Hamlin, Deborah Bouchard and Ian Bricknell of UMaine’s Aquaculture Research Institute will research an integrated approach to addressing sea lice control in the commercial culture of Atlantic salmon in sea pens. The project will address gaps in knowledge of sea lice biology and control methods, such as integrated pest management, and new, ecologically sensitive chemical compounds and their effects on nontarget species, such as lobsters.

Read the full story at MaineBiz

UMaine team gets help in battle with salmon-ruining lice

October 19, 2018 — The University of Maine is getting a boost from the federal government for a pair of aquaculture projects, one of which addresses a pest problem in worldwide salmon farming.

The money is coming from NOAA Sea Grant, which supports fishery and coastal projects. The university says three researchers at its Aquaculture Research Institute will receive more than $700,000 to work on new approaches to address sea lice in salmon operations.

The lice are a major problem for salmon farms in Maine, Canada and around the world as they render the fish impossible to sell. The industry is struggling with resistance to pesticides used to control the lice.

Read the full story from the Associated Press at The Washington Times

What can baby lobsters tell us about the future of Maine’s $1 billion fishery?

October 10, 2018 — The woman sitting on the bench above Peaks Island’s Spar Cove trained her binoculars on Curt Brown’s lobsterboat as it rocked in big swells a half-mile or so offshore. What was she thinking as she saw two men heave what appeared to be two very shallow, very heavy lobster traps onto the gunwale, then shove them into the sea? Did she wonder what they could possibly hope to catch with those stunted little lobster pots? Stunted little lobsters?

Well, yes, sort of. The men were researchers, and they were after baby lobsters, which on that steamy, late-June morning were feathery, newly hatched creatures no bigger than mosquitoes floating somewhere just below the ocean’s surface. As the wire crates sank beneath a bobbing white buoy, Brown plowed the boat forward and called out the location’s coordinates and depth, which University of Maine School of Marine Sciences professor Richard Wahle recorded in a notebook, next to the crate’s tag number. Meanwhile, Wahle’s research associate, Bill Favitta, and grad student Carl Huntsberger lifted two more crates onto the gunwale, readying them for the next drop. The team would repeat the routine 60 times over the next two days as it worked its way offshore to depths of 40 fathoms (or 240 feet).

This is a critical moment for research in Maine’s lobster fishery, which contributes more than $1 billion annually to the state’s economy and generates hundreds of jobs. After more than 30 years of ever-increasing landings — including dramatic, record-breaking surges in the last decade — the catch plunged 16 percent in 2017, and scientists and fishermen are concerned that it may prove to be a grim turning point. “A lot of the work we’re doing is trying to understand how environmental and fishing pressures are influencing trends in the abundance of lobsters, both geographically and over time,” says Wahle. A marine ecologist working at the intersection of fishery science, marine biology, and oceanography, he’s been studying lobsters around the world for 30 years.

Read the full story at Down East Magazine

 

Why Maine lobstermen are looking to farmed scallops to stay afloat

October 3, 2018 — Marsden Brewer is a third-generation Maine fishermen who docks in Stonington.

“I’ve been involved in all the fisheries over my lifetime,” he said.

These days it’s mostly lobster, but he has fished cod and shrimp, and carted urchin to market. These once-vibrant species are now mostly off-limits after being overfished and weakened by climate change.

“I’ve seen the collapse and been part of the collapse of most of the fisheries. Not intentionally, but just the way it was set up to work, it wasn’t sustainable, and this project here is looking at sustainability in a fishery,” he said.

The project Brewer refers to is a 20-year effort to diversify his business by developing a profitable scallop farm. He used to scatter baby scallops in the bay, then trawl up the adults a couple years later. Success was limited though.

Now, from his 38-foot lobster boat moored more than a mile offshore, he’s experimenting with methods from Japan, where scallop farming is a long tradition.

Brewer, his son Bobby and Dana Morse, a marine extension agent with the University of Maine, winch up from the depths a long rope strung with 12-foot dark mesh bags. The collapsible bags are partitioned by horizontal shelves, giving them the look of giant Japanese paper lanterns. Inside, each level holds 20 or so squirting scallops.

Read the full story at Bangor Daily News

A controversial comeback for a highly prized tuna

August 29, 2018 — SOUTH PORTLAND, Maine — On a drizzling summer afternoon in South Portland, marine biologist Walt Golet is helping attach a quarter-ton Atlantic bluefin tuna to a heavy crane so it can be weighed as part of New England’s premier tournament for the giant fish. And this year’s derby is different than many in the past — there are far more tuna.

A decade ago, participants in the Sturdivant Island Tuna Tournament went consecutive years in which they didn’t catch a single fish in the Gulf of Maine. This year, fishermen set a record with 30, including the 801-pound (363.33-kilogram) winner.

Their record haul is happening amid a turning point for these giant tuna, an iconic species that scientists say appears to be slowly recovering in the Atlantic Ocean. The reemergence of bluefin, which can weigh more than half a ton, has led to debate among fishermen, conservationists and scientists over just how much the big fish have recovered. It remains at a fraction of its population 60 years ago.

“There’s probably no fish that’s ever been more politicized than Atlantic bluefin tuna,” said Golet, a University of Maine professor. “People get a passion for this fish. And people are making a living off of this fish.”

The fish have long been at the center of a battle among commercial fishermen who can make a huge amount of money on a single fish, environmentalists who see them as marvels of marine migration, and consumers who pay a hefty price for them in restaurants.

Read the full story from the Associated Press at The Washington Post

Small-scale fisheries threatened—shared management, communication key to success

August 7, 2018 –Intertidal ecosystems and the small-scale fisheries they support are an important part of coastal economies, environments, and cultures. Globally, fisheries such as the soft-shell clams (Mya arenaria), face multiple stresses related to climate change, invasive species and unsustainable land use.

In a paper published in Ocean and Coastal Management, University of Maine researchers and colleagues show how co-management approaches—based on shared responsibility for resource management among individuals and institutions—can build resilience to socio-environmental change by strengthening the use of science in decision making and promoting adaptive capacities such as learning and leadership.

“We see an urgent need to find ways to wade into the complicated and sometimes messy work of co-management as a space for bringing differences together in productive, creative and equitable ways,” says lead author Bridie McGreavy, assistant professor in the Department of Communication and Journalism and faculty member in the Mitchell Center for Sustainability Solutions.

Co-management’s commitment to shared responsibility points to the important role of communication, and requires that people share information, learn from each other, and collaborate.

“The communication aspect of shellfish management is critical to its success,” McGreavy adds. “Our paper demonstrates how taking an engaged approach to research—creating in-depth partnerships to design research that can be used for decision making—can help strengthen co-management.”

In addition to environmental threats, these also face complex social issues, many of which are related to poverty and limited access to educational opportunities. However, small-scale fishing communities in Maine and around the world are also rising to meet these challenges.

Read the full story at PHYS.org