Saving Seafood

Ocean-Based Climate Solutions Act introduced to US House of Representatives

October 20, 2020 — A group of U.S. representatives has introduced the Ocean-Based Climate Solutions Act, a new piece of legislation centered on limiting or reversing damage to the oceans and marine ecosystems caused by climate change.

The new bill, which is 300 pages long, was co-authored by U.S. Rep. Raul M. Grijalva (D-Arizona) and U.S. Rep. Kathy Castor (D-Florida), and involves sweeping rule-making that touches on the energy and fisheries sectors. The bill includes an offshore oil drilling ban, stipulations on new offshore wind energy projects, and pushes for climate-ready fisheries and the promotion of American seafood.

Read the full story at Seafood Source

Marine heat wave ‘blobs’ are becoming more severe as oceans warm

October 20, 2020 — Off the coast of California this August a sea monster of record size was spotted: a patch of warm water that grew to the size of Canada, 9.8 million square kilometers simmering up to 4 degrees Celsius warmer than usual. “It’s off the chart,” says Andrew Leising, a fisheries oceanographer at the National Oceanic and Atmospheric Administration who is mapping the marine heatwave on his website, nicknamed the Blobtracker. By Leising’s reckoning, in September, the unglamorously-named “NEP20b” became the biggest-yet-spotted blob of warm water there since satellite records began in the early 1980s.

Researchers are now scrambling to chart or anticipate the impacts of the NEP20b blob on marine life, tracking how the step change in temperature throws ecosystems out of whack.

The phenomenon of a patch of abnormally warm water off the west coast of North America gained notoriety in 2014, when the first such “Blob” was spotted and given that name, after the horror movie creature that devoured everything in its path. That first Blob lasted years, from 2013 to 2016. It has been blamed for slicing some forage fish populations in half; starving seabirds; triggering a collapse in cod; shifting tuna as far north as Alaska; pushing whales into the path of crab fishing lines and ships; and allowing exotics, including glowing tropical sea pickles, to arrive in northern waters.

In 2019, a second blob emerged. With record-warm waters appearing again this year, some scientists believe the 2019 event, known as Blob 2.0, may have just never gone away. If NEP20b is now big enough and hot enough, Leising says, it may do what the 2013-2016 version did, creating its own microclimate that perpetuates the heat, forcing the warm water to stick around for years yet to come.

Read the full story at PBS

Heat waves on Cape Cod may be tied to slowing ocean current

October 19, 2020 — We really baked this summer, with the Northeast and the East Coast experiencing intense heat waves.

In August alone, the Blue Hill Observatory in Milton recorded six days with temperatures over 90 degrees, four more than the average for the month. July had five days with temperatures over 90, two more than the monthly average.

While we often seek relief in the ocean, marine heat waves also occur, and those can adversely affect the creatures and plants that live there and have no refuge except deeper, colder water, if they can find it. Marine heat waves can be deadly: Researchers say “The Blob,” a large mass of warm water that extended down nearly 700 feet along 1,800 miles of North Pacific coastline, may have killed off over 62,000 common murre birds.

While most might expect that air temperatures may be driving those higher water temperatures, oceanic currents play a major role.

The Atlantic Ocean right off our doorstep is one of the fastest-warming ocean bodies on the planet, and some researchers say that may be due to a slowdown of what is known as the Atlantic conveyor belt, a massive offshore current that transports cold water from the Arctic south to the equator and returns warm water to the north and to Europe.

Read the full story at the Cape Cod Times

GMRI awarded $1.27M to help Maine fisheries overcome climate challenges

October 9, 2020 — The Gulf of Maine Research Institute has been awarded $1.27 million in federal funding to help Maine fisheries and coastal communities in the fight against climate change.

Funding for the Portland-based nonprofit comes from the National Oceanic and Atmospheric Administration’s Climate Program Office. The new project is one of 79 to receive a total of $48.7 million in competitive awards, announced on Oct. 6.

“Every day, communities and businesses grapple with challenges due to climate variability and change,” said Wayne Higgins, director of the Climate Program Office, in a news release.

“From using machine learning to develop critical atmospheric datasets to creating an experimental system for rapidly assessing causes of extreme events, these new awards will expedite climate science discoveries and build the library of resilience solutions needed to protect all sectors of our economy and environment.”

Read the full story at MaineBiz

MASSACHUSETTS: Long a lifeblood, South Shore fishing industry faces numerous challenges

October 6, 2020 — Over his more than five decades fishing commercially, Frank Mirarchi has watched the business evolve from thriving and straightforward to complicated and diminished, with skyrocketing costs, foreign competition and changing regulations choking an industry synonymous with the South Shore.

In the late 1960s, when he purchased his first of three successive boats, fish was abundant enough to make a solid living off of.

“You worked hard, you caught a lot of fish, the fish were actually enough to compensate you for their cost,” he said.

In the 70s, he had two other men work on his boat with them, and their catch was enough to support all three families.

But the technologically-advanced equipment and permits have gotten prohibitively expensive for many, while regulations aimed at replenishing overfished populations have not been successful, Mirachi said.

Up until the 1970s, fishing was largely unregulated. In 1976, the US government extended its jurisdiction from 12 miles off coast to 200, eliminating foreign competition and leading to a rush of new US fishermen, creating a fish scarcity from overfishing.

“By 1985 or so, fishing was pretty bad,” Mirachi said. With profits dropping, he switched from having two other crew members to one.

Read the full story at Wicked Local

As climate change threatens Maine fisheries, it’s not all bad news for oysters

September 28, 2020 — Despite the threat climate change poses to longstanding Maine fisheries such as lobsters and softshell clams, and the harm it already has inflicted on northern shrimp and groundfish, there is one Maine fishery that has seen rapid growth in the past decade and is expected to continue expanding: oysters.

Eastern oysters are native to Maine, and have long been harvested as food along the coast, as evidenced by piles of ancient shell middens found along the banks of the tidal Damariscotta River. The river is where the current fishery was revived as an aquaculture enterprise in the 1980s, when growers seeded and harvested hundreds of thousands of pounds of both Eastern and European oysters each year.

Since then the industry has expanded along the Maine coast to Wells in York County and Steuben in Washington County to include nearly 100 commercial lease sites (more than two dozen of which are on the Damariscotta River) and millions of dollars in annual revenues. In 2019, oyster growers earned $7.6 million in gross revenues — more than three-and-a-half times what they took in in 2010 — making oysters one of the most valuable marine fisheries in the state.

Read the full story at the Bangor Daily News

Study: Maine’s lobster co-management system offers lessons for other fisheries

September 25, 2020 — In the 1990s, Maine’s lobster industry and state regulators developed a co-management system that established seven lobster fishing councils, comprised of local fishermen, to oversee fishing practices in seven zones along the coast.

The system was designed to integrate the knowledge of local fishermen to help manage certain aspects of the fishery, as an alternative to top-down management by government regulators.

That model has lessons for fisheries beyond Maine, according to a new study by University of Maine conservation scientists.

“The Maine lobster fishery is a great example of how individual harbors can have localized control over managing fishing areas and over deciding on fishing practices in their local area,” UMaine researcher Kara Pellowe told Mainebiz. “In the 1990s, that was formalized as Maine’s lobster zones. How Maine manages lobsters has, over time, reflected increasing alignment between formal and informal rules.”

Read the full story at MaineBiz

Studies investigate marine heatwaves, shifting ocean currents

September 22, 2020 — In a paper published September 17 in the Journal of Climate, WHOI oceanographers and collaborators at the GEOMAR Helmholtz Centre for Ocean Research Kiel in Germany use a new model to understand how ocean processes affect marine heatwaves at depth off the west coast of Australia. Known as “Ningaloo Niño,” these extreme warming events have caused mass die-offs of marine organisms, coral bleaching, and potentially permanent ecosystem shifts, all of which impact fisheries and the economies that depend on them.

“This area is a hotspot for increasing temperature and extreme events, with drastic impacts on regional marine species,” said lead author Svenja Ryan. “It’s important to understand where in the water column temperature and salinity changes are happening so you can determine how the ecosystem will be impacted.”

For the first time in the Southern Indian Ocean, Ryan and her co-authors, WHOI physical oceanographers Caroline Ummenhofer and Glen Gawarkiewicz, showed that the effects of marine heatwaves extend to 300 meters or more below the surface along the entire west coast of Australia. They found that during La Niña years, the southward-flowing Leeuwin Current becomes stronger and is associated with warm temperature anomalies at greater depths. These conditions were observed during the 2011 marine heatwave that led to the first-recorded coral bleaching at Ningaloo Reef, a World Heritage site, and extensive loss of a nearby kelp forest. During El Niño periods, the temperature and salinity anomalies associated with marine heatwaves are limited to the ocean surface, showing that complex ocean processes play an important role in the depth-extent of extreme events.

Ryan and her colleagues are using a similar modeling approach to study marine heatwaves in the Northwest Atlantic. “The challenge, wherever you go, is that marine heatwaves have so many drivers,” Ryan said. “Understanding different types of events and their associated depth structure is crucial for regional impact assessment and adaptation strategies, as well as for predicting potential changes in a future climate.”

Read the full story at Science Daily

Marine animals live where ocean is most breathable, ranges may shrink with climate change

September 17, 2020 — As oceans warm due to climate change, scientists are trying to predict how marine animals—from backboned fish to spineless jellyfish—will react. Laboratory experiments indicate that many could theoretically tolerate temperatures far higher than what they encounter today. But these studies don’t mean that marine animals can maintain their current ranges in warmer oceans, according to Curtis Deutsch, an associate professor of oceanography at the University of Washington.

“Temperature alone does not explain where in the  an animal can live,” said Deutsch. “You must consider : how much is present in the water, how well an organism can take up and utilize it, and how temperature affects these processes.”

Species-specific characteristics, overall  and water temperature combine to determine which parts of the ocean are “breathable” for different ocean-dwelling creatures. New research led by Deutsch shows that a wide variety of marine —from vertebrates to crustaceans to mollusks—already inhabit the maximum range of breathable ocean that their physiology will allow.

Read the full story at PHYS.org

The future of food from the sea, explained

September 15, 2020 — In the year 2050, Earth will have almost 10 billion humans who will eat over 500 billion kilograms of meat. That is 2 billion more people and 177 billion more kilograms of meat than Earth currently has. With land-based meat fraught with climate and environmental impacts, how much animal protein can be sustainably supplied by the ocean? A new (open access) paper in Nature titled, The Future of Food from the Sea, answered that question and provided an economic roadmap for sustainable ocean food production.

The authors conclude that by 2050, the ocean could sustainably provide 80-103 billion kilograms of food, a 36-74% increase compared to the current yield of 59 billion kilograms. Crucially, the 2050 numbers were not a simple calculation of the carrying capacity of food production, but instead reflected the economic realities of growing and harvesting food in the ocean. The authors identified four key steps towards a more bountiful ocean:

  1. Improve fishery management
  2. Implement policy reforms to address mariculture
  3. Advance feed technologies for fed mariculture
  4. Shift consumer demand

In this post, I explain the numbers behind potential food production in the ocean and what the policy and governance process might look like going forward.

Read the full story at Sustainable Fisheries UW