Saving Seafood

Past heat waves and low sea ice continued to impact Alaska’s waters in 2021

January 18, 2022 — The so-called blob that brought warm surface water temperatures to the Gulf of Alaska between 2014 and 2016 has passed.

But the effects of that blob, and a subsequent heat wave in 2019, are not all in the rearview mirror. And researchers are bracing for more as climate change brings with it more ocean warming.

“For an area like the Gulf of Alaska, definitely this is a topic we need to understand better,” said Bridget Ferriss, a research fish biologist with NOAA Fisheries. She edited this year’s Ecosystems Status Report for the Gulf of Alaska, used by federal managers to inform fisheries policy in Alaska.

Last year, researchers continued to track the impacts of recent heat waves on Alaska’s marine species.

Ferriss said a heat wave happens when the sea surface temperature on a given day is warmer than 90% of the temperatures on record for that same day, for five days in a row.

Read the full story at KTOO

In hot water: Ocean warming hits another record high on climate change

January 18, 2022 — The ocean is now warmer than it’s ever been in recent history, according to a new study. And this isn’t the first time such a record has been set. For the past six years, ocean temperatures have exceeded each previous year in a trend one scientist calls “inexorable.”

Human-induced climate change is to blame, says John Abraham, co-author of the new study published Jan. 11 in Advances in Atmospheric Sciences.

 “We should be very concerned,” Abraham, a professor of thermal sciences at the University of St. Thomas in Minnesota, U.S, told Mongabay in a video interview. “But frankly, we should have been concerned years ago.”

The research team used a network of high-tech autonomous ocean buoys to measure global ocean temperatures, which they compared to data from the 1950s. They found that in 2021, the upper 2,000 meters (6,600 feet) in all of the oceans absorbed 14 zettajoules more of human-made energy than the previous year, equal to about 145 times the world’s electricity generation in 2020.

Abraham puts it another way: “It’s the equivalent of seven Hiroshima atomic bombs detonated every second of every day of every week of every month.

“The story we’ve been telling since 2018 is that every year it’s getting hotter and hotter,” he added. “And records are being broken as this inexorable, unrelenting rise of ocean temperatures occurs.”

Read the full story at Mongabay

 

Climate change could end Maine’s lobster boom, some fear

January 11, 2022 — Among the deep underwater valleys off Maine’s craggy, crooked coast crawls one of the must lucrative species in American waters — Homarus americanus, the American lobster.

For almost 20 years, record haul numbers padded the pockets of Maine lobstermen, but with landings declining for five straight years, many wonder how the industry will survive the impacts of climate change.

Last year, Maine’s commercial lobstermen landed $500 million worth, and many of the most successful lobstermen pocket upward of $500,000 each.

Data show the Gulf of Maine is rapidly warming, pushing lobsters farther north and into deeper waters, forcing lobstermen and researchers to grapple over exactly how long the boom times will last and whether they can be prolonged.

Read the full story at UPI

Warmer, oxygen-poor waters threaten world’s ‘most heavily exploited’ fish

January 7, 2022 — In 2008, a team of researchers boarded an expedition vessel and set sail for the anchovy-rich waters off the coast of Peru. They were searching for a place to extract a sediment sample that would unearth secrets about the ocean from 130,000 years ago, a time when the planet was experiencing its last interglacial period. About 130 kilometers (80 miles) north of Lima, the researchers found an ideal spot; they bore into the seabed and drew out a 20-meter (66-foot) core sample.

Over the next 13 years, researcher Renato Salvatteci and a team of colleagues worked to date the core and measure fish debris. They were trying to figure out what fish were living along the Humboldt Current system off the coast of Peru during that interglacial period, when the ocean contained little oxygen and was about 2° Celsius (3.6° Fahrenheit) warmer than the average temperature experienced in the current Holocene epoch — conditions that almost match what scientists project for 2100 as climate change rapidly transforms our modern world.

Today, the Humboldt Current contributes to more than 15% of the global annual fish catch, mainly due to its abundance of Peruvian anchoveta (Engraulis ringens), a species in the anchovy family. It’s also what global conservation authority the IUCN calls “the most heavily exploited single-species fishery in world history.”

Every centimeter of the sediment held an astonishing amount of information — about 90 years’ worth, said Salvatteci, a fisheries engineer at Kiel University in Germany. What they found embedded in the ancient sediment wasn’t anchoveta, but the vertebrae of “considerably smaller” fish, such as mesopelagic and goby-like fish, that were able to cope with the low oxygen levels in the water. They published their findings in Science on Jan. 6.

Read the full story at Mongabay

New NOAA reports on Alaska’s oceans highlight disruptive warming trends

December 27, 2021 — The annual Ecosystem Status Reports from the National Oceanic and Atmospheric Administration collect a wide range of data to better assess maritime trends and help steer fisheries management.

Elizabeth Siddon, who edited a report on the eastern Bering Sea, called the annual documents “anthologies of the ecosystems as we know them” — collaborative efforts pulling information from scientists, community members and industry groups, among others. The reports released this week also cover the Gulf of Alaska and Aleutian Islands.

If there’s any theme in this year’s detailed surveys of Alaska’s marine systems, it’s heat. The three areas assessed all involve “sustained warm conditions” that are affecting environment dynamics like sea ice and water columns, as well as the composition of animal stocks thriving and failing in recent years. The assessments factor into harvest policies set by the North Pacific Fisheries Management Council and touch any Alaskans who depend on sea animals, whether for work or food.

Read the full story at the Anchorage Daily News

 

Maine’s shrimp fishery will stay closed, but regulators warm to idea of limited harvest

December 20, 2021 — Maine’s northern shrimp fishery has been closed for seven years and regulators decided Friday to continue the harvest moratorium for another three years with no signs of rebound.

But in a change, officials with the Atlantic States Marine Fisheries Commission entertained the idea of opening a small personal-use fishery at the suggestion of the Maine Department of Marine Resources and planned to look into it in the future.

A moratorium was enacted after the northern shrimp stock collapsed in 2013 and has been in place ever since. It is unclear what caused the shrimp’s downturn but recent research suggests that a species of squid that rode into the Gulf of Maine on a historic 2012 heatwave may have played a significant role.

Maine is the southernmost range of the shrimp and the gulf’s warming waters are also suspected to be part of the reason the cold-loving shrimp have struggled to bounce back, even with no commercial fishing for nearly a decade.

Read the full story at The Bangor Daily News

Maine Voices: We need more awareness of mental health stresses on Maine’s fishermen

December 20, 2021 — Farmers and fishermen both rely on the weather to determine their schedules. One prays for rain, the other for clear skies and calm seas. Both wake up before the rooster crows and go to bed thinking about another full day of work ahead. They have similar concerns: regulations, development, finances, labor and their families.

Other parallels that can be drawn include the generational nature of the work; intrinsic family and community culture, and legacies of land, boats or buoys. Both industries are grappling with climate change: Farmers are stewards of the land; fishermen are stewards of the sea.

Farming and fishing are two industries that are historically comprised of men, and in the past decade, the median age of both has increased (around 57). While there has been increasing attention on the mental health impacts and suicide risk factors for farmers, little research is focused on the specific mental health challenges of fishermen. Because of the similarities in work factors and demographics, research on the suicide risk for farmers may inform risks for fishermen.

Read the full opinion piece at The Portland Press Herald

A Maine clam could help fishermen as climate change pushes out other species

December 20, 2021 — Some commercially fished species in Maine have seen their numbers decline in recent years due to climate change, but one of the state’s clam fisheries is growing and could help provide another way for fishermen to earn a living.

Northern quahogs, also known as hard clams, are among a handful of fisheries including Maine oysters — most of which are grown at sea farms — seaweed, and baby eels whose harvest volumes and values have increased over the past decade. Meanwhile, others including northern shrimp, softshell clams — and even the state’s still dominant lobster fishery — have shrunk.

For Mark Cota, a Topsham fisherman who grew up in Harpswell, the money in quahogs (pronounced “ko-hogs”) has been good enough that this year he started harvesting them full-time.

“I’ve done it for like four years,” Cota, 33, said Friday, chatting on the phone while raking for the clams on the tidal New Meadows River, which separates the towns of Brunswick and West Bath. “The price is right, and I’m getting good at it.”

Read the full story at The Bangor Daily News

Lobstering, climate change, and Maine. Read 7 takeaways from our ‘Lobster Trap’ series

December 17, 2021 — In “The lobster trap,” The Boston Globe and the Portland Press Herald zoomed in on a small island central to Maine’s signature industry, smack dab in the crosshairs of global climate change. Reporters immersed themselves in the lives of local lobstermen reckoning with change and struggling to plot a path into the future.

Below are seven key takeaways from the series:

1. The forces that sparked a lobster boom, and brought unprecedented prosperity to Maine lobstermen, can also take it all away.

The American lobster thrives in chilly waters between 54 and 64 degrees, but can stay healthy up to 68 degrees. Long-term exposure to anything hotter spells serious trouble, like respiratory and immune system failure.

As ocean temperatures rise, the epicenter of the lobster population is shifting north to cooler waters. Right now, the thermal sweet spot is off midcoast Maine, where Vinalhaven and Stonington lobstermen fish.

But scientists warn the good times won’t last: As warming continues, they predict the catch will decline by half within 30 years.

Read the full story at The Boston Globe

New England shrimp fishery to stay shuttered as waters warm

December 17, 2021 — New England’s commercial shrimp fishery will remain shut down because of concerns about the health of the crustacean’s population amid warming ocean temperatures.

The cold-water shrimp were once a winter delicacy in Maine and beyond, but the fishing industry has been shut down since 2013. A board of the regulatory Atlantic States Marine Fisheries Commission voted on Friday to keep the fishery shuttered for at least three more years.

The shrimp prefer cold water and their population health is imperiled by the warming of the ocean off New England. The Gulf of Maine, in particular, is warming faster than most of the world’s ocean.