Saving Seafood

Baby lobster numbers spell trouble for shellfish population

July 1, 2019 — Baby lobsters are continuing to appear in high numbers off some parts of Canada while tailing off in New England, raising questions about what the valuable shellfish’s population will look like in several years.

University of Maine scientist Rick Wahle has documented trends in baby lobster density for years, and released new data for 2018 this month. The new data reinforce recent trends about lobsters that show upticks off sites in Atlantic Canada, such as some areas in Nova Scotia, Wahle said. Meanwhile, the Gulf of Maine reported below average numbers from Bar Harbor to Cape Cod, he said.

Young lobsters settle into the ocean bottom, where they take shelter as they grow. Wahle tracks where lobsters are settling in 23 areas from Rhode Island to Prince Edward Island, Canada. This year’s data showed high totals in Canadian locations such as St. Mary’s Bay, Nova Scotia, and the southern Gulf of St. Lawrence, but low numbers in Maine fishing areas such as the Midcoast region and Casco Bay.

American fishermen compete with Canada for the same species of lobster, which anchors one of the most lucrative fisheries in either country. Some scientists have said the shellfish appear to be moving north as waters warm.

“It’s as if this wave that has crested in Maine is now increasing in Atlantic Canada,” Wahle said.

New England’s commercial harvest of lobster has been strong in recent years, but it’s dependent on young lobsters growing to maturity. Some New England sites, such as those off Rhode Island, show few baby lobsters at all.

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

State of the Science Conference set for UMaine-Machias

June 17, 2019 — Big science is coming to Downeast Maine next week.

On Monday and Tuesday, June 17 and 18, the Eastern Maine Coastal Current Collaborative (EM3C) will host a State of the Science Conference at the University of Maine at Machias.

The conference will discuss ecosystem-based fisheries management in eastern Maine and will bring together experts from local governments, fishing, science and academic communities. It is the first step toward producing a comprehensive understanding of the region’s watersheds, intertidal, nearshore and offshore ecosystems, including their governance and socioeconomic factors.

EM3C is a partnership among three fisheries organizations: the Stonington-based, nonprofit Maine Center for Coastal Fisheries; the Maine Department of Marine Resources; and NOAA Fisheries, the federal agency that manages fisheries at the state and federal level.

Read the full story at The Ellsworth American

MAINE: Two seafood companies team up to fund UMaine lobster research

June 4, 2019 — A $75,000 gift from two seafood companies will fund a fourth field season for a University of Maine deep-water lobster settlement monitoring program.

The deep-water research is an extension of the American Lobster Settlement Index, which was initiated in 1989 by Rick Wahle, a research professor in the School of Marine Sciences who was named director of the Lobster Institute last fall. The index includes collaborators and monitoring sites from Rhode Island to Newfoundland.

The original surveys were conducted by divers, which confined data collection to shallower waters. In 2016, Wahle expanded monitoring to include greater depths with a novel collector deployed from fishing vessels. The addition of this data helps scientists evaluate how temperature affects the nursery potential of seabed for larval lobsters, and subsequent bottom movements by older juveniles.

Maine Sea Grant sponsored the first two years of deep-water monitoring in collaboration with Ready Seafood Co. of Portland and the Maine Department of Marine Resources. When the Maine Sea Grant project ended, Ready Seafood stepped in with a $75,000 gift to support a third research field season in 2018.

Read the full story at MaineBiz

During abrupt warming, lobsters in acidic water have reduced heart function, fewer infection-fighting cells

April 25, 2019 — Ocean acidification and warming may be an unhealthy combination for lobsters, say University of Maine scientists.

The heart rates of lobsters (Homarus americanus) who lived 60 days in water with predicted end-century  pH levels became erratic significantly sooner during an abrupt warming event than those of lobsters in ocean water with current pH levels.

The findings could be “likened to putting people on a treadmill and finding that people exposed to  fell off the treadmill from exhaustion much sooner than those not exposed,” says Heather Hamlin, a reproductive endocrinologist and associate professor in the School of Marine Sciences.

The lobsters exposed to acidic ocean conditions also had fewer cells that fight infection in their hemolymph (similar to blood), says Amalia Harrington, a recent marine biology Ph.D. graduate.

So while lobsters in acidic  may look and act normal, they experience physiological challenges when exposed to multiple stressors, says Hamlin.

She and Harrington tested adolescent female lobsters transitioning to adulthood. Effects of environmental stressors during this stage could have major impacts on the population of the species, say the researchers, who believe this is the first such study of its kind.

“We’re really trying to get at the ‘hidden’  on this understudied but extremely important stage of the American lobster,” says Harrington.

“Most of the previous work exploring climate change impacts on American lobster has focused on early developmental stages (eggs and larvae). While this is helpful for understanding how environmental change might impact the number of baby lobsters that survive their time in the plankton and make it to the seafloor, it doesn’t really tell us what impact that will have on the population as a whole.”

Read the full story at PHYS.org

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