Saving Seafood

Climate change threatens commercial fishers from Maine to North Carolina

June 18, 2019 — Most fishing communities from North Carolina to Maine are projected to face declining fishing options unless they adapt to climate change by catching different species or fishing in different areas, according to a study in the journal Nature Climate Change.

Some Maine fishing communities were at greatest risk of losing their current fishing options, according to the study by Rutgers and other scientists.

“Some communities like Portland, Maine, are on track to lose out, while others like Mattituck, New York, or Sandwich, Massachusetts, may do better as waters warm,” said senior author Malin Pinsky, an associate professor in the Department of Ecology, Evolution, and Natural Resources at Rutgers University-New Brunswick. “Adapting to climate change for many communities will require fundamentally new approaches to fishing. Change has become the new normal.”

Fishing has been the economic and cultural lifeblood for many coastal towns and cities along the Northeast coast, in some cases for hundreds of years, Pinsky said. But climate change is expected to have a major impact on the distribution, abundance and diversity of marine species worldwide, the study notes.

Read the full story at PHYS.org

Ørsted US Offshore Wind announces partnership with Rutgers University

May 17, 2019 — Ørsted U.S. Offshore Wind will support academic research activities related to offshore wind at Rutgers University under a Memorandum of Understanding (MOU) signed Thursday.

Ørsted will make an initial contribution to Rutgers, followed by additional funding contingent upon being granted an OREC application by the New Jersey Board of Public Utilities.

Ørsted submitted an application for its Ocean Wind project to the NJBPU in December 2018 to develop the first offshore wind farm in New Jersey. The announcement for the award is expected from the NJBPU in summer 2019.

“Rutgers University is a premier institution that can provide us with ongoing research that will help propel the New Jersey offshore wind industry forward,” Thomas Brostrøm, CEO of Ørsted U.S. Offshore Wind and president of Ørsted North America, said in a statement. “We are very happy to partner with them as we progress with our Ocean Wind project.”

Read the full story at NJBiz

Ocean-Dwelling Species Are Disappearing Twice as Quickly as Land Animals

April 26, 2019 — Marine animals are twice as vulnerable to climate change-driven habitat loss as their land-dwelling counterparts, a new survey published in the journal Nature finds.

As Mark Kaufman reports for Mashable, the analysis—centered on around 400 cold-blooded species, including fish, mollusks, crustaceans and lizards—suggests marine creatures are ill-equipped to adapt to rising temperatures and, unlike land animals that can seek shelter in the shade or a burrow, largely unable to escape the heat.

“You don’t have anywhere to go,” Natalya Gallo, a marine ecologist at the Scripps Institution of Oceanography who was not involved in the study, tells Kaufman. “Maybe you can hide under a kelp leaf, but the entire water around you has warmed.”

Speaking with National Geographic’s Christina Nunez, lead author Malin Pinsky, an ecologist and evolutionary biologist at Rutgers University in New Jersey, further explains that ocean dwellers “live in an environment that, historically, hasn’t changed temperature all that much.”

Given that cold-blooded creatures rely on their surroundings to regulate body temperature, relatively stable marine ecosystems have actually made their inhabitants more susceptible to significant temperature changes. And while ocean temperatures are still much lower than those on land, as Anthony J. Richardson and David S. Schoeman point out in an accompanying Nature News and Views piece, marine heat waves, increased carbon dioxide pollution and other products of global warming are driving Earth’s oceans to higher temperatures than ever before.

To assess the threat posed by warming waters, Pinsky and her colleagues calculated “thermal safety margins” for 318 terrestrial and 88 marine animals. According to Motherboard’s Becky Ferreira, this measure represents the difference between a species’ upper heat tolerance and its body temperature at both full heat exposure and in “thermal refuge,” or cooled down sanctuaries ranging from shady forests to the depths of the ocean.

Read the full story at Smithsonian.com

Mid-Atlantic Coastal Acidification Network Seeking Stakeholder Perspectives on Ocean Acidification

April 11, 2019 — The following was released by the Mid-Atlantic Fishery Management Council:

The Mid-Atlantic Coastal Acidification Network (MACAN) is seeking perspectives on ocean acidification from members of commercial fishing, seafood, aquaculture, charter boat and recreational fishing organizations in the Mid-Atlantic. MACAN is a nexus of scientists, tribal, federal, and state agency representatives, resource managers, and affected industry partners who seek to coordinate and guide regional observing, research, and modeling of ocean and coastal acidification. MACAN would like to gain a better understanding of how stakeholders see coastal and ocean acidification affecting business operations or recreational fishing activities now or in the future. In addition, MACAN is seeking thoughts on opportunities to raise awareness and encourage participation in regional efforts to monitor for and adapt to coastal and ocean acidification.

You can help by participating in MACAN’s Stakeholder Outreach Survey. To access the survey, click on your industry or affiliation from the list below. The survey should take about 5-10 minutes to complete. Your responses are voluntary and anonymous. Please respond by June 14, 2019.

If you have any questions about the survey, please contact survey coordinators Kirstin Wakefield at kirstin.wakefield@gmail.com or Grace Saba at saba@marine.rutgers.edu. If you’d like to learn more about MACAN, please visit www.MidACAN.org, or send an email to: info@MidACAN.org.

This survey is a collaborative effort with Rutgers University. For more information, please contact Dr. Grace Saba, Assistant Professor, Center for Ocean Observing Leadership, Department of Marine and Coastal Sciences, Rutgers University, 71 Dudley Rd, New Brunswick, NJ 08901. Email: saba@marine.rutgers.edu.

Climate Change Is Already Reshaping Commercial Fishing

March 26, 2019 — The ocean has been steadily warming over the past 100 years, absorbing most of the heat trapped by atmospheric greenhouse gases. Unless we swiftly and dramatically reduce greenhouse gas emissions, the ocean could warm by as much as 4°C in the next 80 years. This puts fish and the people they feed and employ in hot water. Half of the planet relies on fish as a vital source of protein, and the fishing industry employs more than 56 million people worldwide.

Understanding where and why fisheries have been impacted by warming is necessary to ensure that the ocean remains a source of both nutrition and prosperity. In a study published in Science, I, along with colleagues from Rutgers University and the U.S. National Oceanic and Atmospheric Administration, show that ocean warming has already hurt fisheries’ ability to provide food and support livelihoods around the globe.

Fisheries are like a bank account, where we live off the interest. If fishing reduces the principal too much, the interest is lowered. Similarly, if the environment reduces the interest rate, the interest is also lowered. We combined maps of historical ocean temperature with estimates of historical fish abundance to see how warming has affected the interest rate and returns from the global fisheries bank account.

Fish don’t want their water too hot or too cold. As the ocean warms, they move poleward and into deeper water to follow their preferred temperatures. The impacts of these shifts are complicated; depending on the species, ocean warming and its knock-on effects can either increase or decrease the habitat available to fish. This can either increase or decrease the availability of important species in the food chain. Thus, ocean warming might benefit some fish populations while hurting others.

This is what we found in our research. Although warming has benefited some fisheries, it has hurt others. The losers outweighed the winners, resulting in a net 4% decline in sustainable catch potential over the last 80 years. Four percent might sound small, but it represents a loss of 1.4 million metric tons previously available for food and income.

Some regions have been hit especially hard. The North Sea, which supports large commercial fisheries for species like Atlantic cod, haddock, and herring, has experienced a 35% loss in sustainable catch potential since 1930. The waters of East Asia, neighbored by some of the fastest growing human populations in the world, have seen losses of 8% to 35% across three seas.

Read the full story at Baron’s

Black seabass terrorizing New England’s lobsters

March 14, 2019 — Black seabass — a saltwater fish that previously was rarely taken commercially and recreationally in Massachusetts, US, or other parts of southern New England — have increased in number there and are rattling the lobster industry, reports the MV Times, a local news service.

They’re eating the younger, smaller crustaceans, in particular, and maiming the larger ones they can’t fit in their mouths.

“They feed aggressively,” Rutgers University marine biologist Olaf Jensen is quoted as saying. “They’re not picky eaters. If it’s the right size and it’s alive, they’ll eat it.”

Read the full story at Undercurrent News

Black sea bass gobbling up lobsters

March 12, 2019 — Black sea bass, a saltwater fish taken commercially and recreationally in Massachusetts, have increased in number throughout southern New England waters and rattled the lobster industry with their wolfish appetites.

“They feed aggressively,” Rutgers University marine biologist Olaf Jensen said. “They’re not picky eaters. If it’s the right size and it’s alive, they’ll eat it.”

The young of New England’s iconic crustacean fall into the right size category. “Black sea bass love little lobsters,” Michael Armstrong, assistant director of the Massachusetts Division of Marine Fisheries, said.

That’s of deep concern to Beth Casoni, president of the Massachusetts Lobstermen’s Association, who says lobster traps are being pillaged by these fish. They are often hauled up with the bass inside the traps, alongside lobsters they couldn’t fit in their mouths, she said. Even more concerning to Casoni is their alleged habit of picking off undersize lobsters tossed overboard by lobstermen.

Read the full story at The Martha’s Vineyard Times 

Past decisions in seafood management portend future actions, Rutgers study finds

January 23, 2019 — A study led by Rutgers University has shown that the choice to conserve or overharvest renewable resources such as fish is often due to habits and past decisions, which could help fisheries discover why some succeed at conservation and others fail.

The study, “Path-dependent institutions drive alternative stable states in conservation,” was published in Proceedings of the National Academy of Sciences. It showed that conservation is significantly easier to continue once it has already been started.

According to lead author Edward W. Tekwa, those who start conserving can often continue with it, but when conservation is not being practiced, the opposite is true.

Read the full story at Seafood Source

Ocean Warming Is Accelerating Faster Than Thought, New Research Finds

January 14, 2019 — Scientists say the world’s oceans are warming far more quickly than previously thought, a finding with dire implications for climate change because almost all the excess heat absorbed by the planet ends up stored in their waters.

A new analysis, published Thursday in the journal Science, found that the oceans are heating up 40 percent faster on average than a United Nations panel estimated five years ago. The researchers also concluded that ocean temperatures have broken records for several straight years.

“2018 is going to be the warmest year on record for the Earth’s oceans,” said Zeke Hausfather, an energy systems analyst at the independent climate research group Berkeley Earth and an author of the study. “As 2017 was the warmest year, and 2016 was the warmest year.”

As the planet has warmed, the oceans have provided a critical buffer. They have slowed the effects of climate change by absorbing 93 percent of the heat trapped by the greenhouse gases humans pump into the atmosphere.

“If the ocean wasn’t absorbing as much heat, the surface of the land would heat up much faster than it is right now,” said Malin L. Pinsky, an associate professor in the department of ecology, evolution and natural resources at Rutgers University. “In fact, the ocean is saving us from massive warming right now.”

Read the full story at The New York Times

URI and VIMS Researchers Show Aquaculture Oysters Can Limit Spread of Dermo in Wild Oysters

December 19, 2018 — SEAFOOD NEWS — Recent research carried out at the University of Rhode Island and the Virginia Institute of Marine Science has found that growing farmed oysters can reduce disease loads in wild oysters.

This counter-intuitive finding is based on the fact that the primary killer of wild oysters is Dermo, a parasite that occurs naturally in the environment, and lives in the tissue of oysters.  The single celled parasite is harmless to humans, and has nothing to do with bacteria such as vibrio.

“The very act of aquaculture has positive effects on wild populations of oysters,” said Tal Ben-Horin, a postdoctoral fellow at the URI Department of Fisheries, Animal and Veterinary Sciences in the College of the Environment and Life Sciences. “The established way of thinking is that disease spreads from aquaculture, but in fact aquaculture may limit disease in nearby wild populations.”

Working with colleagues at the University of Maryland Baltimore County, Rutgers University, the U.S. Department of Agriculture, and the Virginia Institute of Marine Science, Ben-Horin integrated data from previous studies into mathematical models to examine the interactions between farmed oysters, wild oysters and the common oyster disease Dermo.

Basically, Dermo is spread through an oyster reef when infected oysters die, and their tissues decay.  But aquaculture, particularly caged or bagged oysters off the seabed, act as filters, and take in the Dermo parasite, but they are harvested and sold before the parasite has any lethal effects.

The net result is that near oyster farms, the incidence of wild Dermo goes down.

According to Ben-Horin, diseases are among the primary limiting factors in wild oyster populations. There are few wild populations of oysters in New England because of Dermo and other diseases, and in the Chesapeake Bay and Delaware Bay, wild oysters are managed with the understanding that most will die from disease.

“As long as aquaculture farmers harvest their product before the disease peaks, then they have a positive effect on wild populations,” Ben-Horin said. “But if they’re left in the water too long, the positive effect turns negative.”

The study’s findings have several implications for the management of wild and farmed oysters. Ben-Horin recommends establishing best management practices for the amount of time oysters remain on farms before harvest. He also suggests that aquaculture managers consider the type of gear – whether farmers hold oysters in cages and bags or directly on the seabed – when siting new oyster aquaculture operations near wild oyster populations.

This story was originally published by SeafoodNews.com, a subscription site. It is reprinted with permission.