Saving Seafood

New Study Finds Ways to Potentially Reduce Uncertainty in Shellfish Assessments

December 4, 2020 — The following was released by the Science Center for Marine Fisheries:

Researchers working to determine the abundance of shellfish, including surfclams and ocean quahogs, have faced limits in getting a precise count due to the uncertainty inherent in stock assessment surveys. A new study, by Leanne Poussard, Dr. Eric Powell, and Dr. Daniel Hennen and published this month in Fisheries Research, examines one of these sources of uncertainty.

Uncertainty is a major factor affecting all stock assessments, which rely on estimating the size of an entire population based on the data provided by a small sample. Identifying these sources of uncertainty is key to producing precise estimates. In the case of surfclams and other shellfish species, a main driver of uncertainty is how efficient the dredges used during the stock surveys are in catching shellfish.

The National Marine Fisheries Service (NMFS) conducts what are known as depletion experiments to measure how efficiently a dredge harvests clams; a dredge will be run multiple times in a single area, and how quickly the catch declines with each subsequent tow will be used to estimate its efficiency. NMFS has also developed a statistical model to estimate the level of uncertainty present in these experiments.

Using this model, as well as running simulations of dredge tows, the new study finds that uncertainty in depletion experiments can be significantly reduced by taking measures such as running additional tows, and having more overlapping tows during the course of an experiment to measure gear efficiency. Having these measures in place could significantly reduce the role of survey gear as a source of uncertainty.

“By making modest changes to the way we conduct surfclam depletion experiments, we can potentially reduce uncertainty and be more confident in the ultimate results of clam stock assessments,” said Leanne Poussard, the lead author of the study. “This study provides clear guidance on the best ways to conduct future shellfish depletion experiments.”

“As a participant in NMFS surfclam and ocean quahog stock assessments over the past 30 years, I can attest that uncertainty regarding dredge efficiency has been a continuing source of scientific caution in projecting stock biomass, and appropriate levels of commercial harvest,” said Tom Alspach, of Sea Watch International. “This new work should significantly ameliorate that uncertainty, allowing fishery managers to appraise stock sustainability with more confidence, leading in turn to stability in annual quotas for the direct benefit of the harvesting sector. This is why the surfclam/ocean quahog industry has enthusiastically provided financial support for the research initiatives of SCEMFIS.”

The study is the latest to be funded by the Science Center for Marine Fisheries (SCEMFIS), and is part of the Center’s work of improving shellfish science and management. SCEMFIS is part of the National Science Foundation’s Industry-University Cooperative Research Center program. Working together with its partners in the fishing industry, SCEMFIS identifies the most pressing needs in finfish and shellfish science. In the last year, SCEMFIS funded over $191,000 in scientific research.

Science Center for Marine Fisheries Welcomes Atlantic Red Crab Company as Newest Member

November 5, 2020 — The following was released by the Science Center for Marine Fisheries:

The Science Center for Marine Fisheries (SCEMFIS) is pleased to announce that the Atlantic Red Crab Company has become the latest company to join the Center’s Industry Advisory Board. With this new addition to our growing list of industry partners, the Center is ready to continue its record of collaborative fisheries research.

For the past 7 years, SCEMFIS has brought together leading academic researchers and members of the fishing industry to identify the most pressing needs in marine science research. With the support of its industry partners, SCEMFIS scientists have published innovate studies providing new understanding of finfsh and shellfish. In 2020 alone, the Center funded $191,000 in new research projects addressing these priorities.

“The Atlantic Red Crab Company has been involved in cooperative science for years, and sees this opportunity to join SCEMFIS as a way to leverage resources and gain a broader scientific perspective,” says Jon Williams, owner of the Atlantic Red Crab Company.

Based in New Bedford, Massachusetts, the Atlantic Red Crab Company harvests red crab in the waters of the Northeast U.S. The red crab fishery is sustainably managed, and red crab is listed as a “good alternative” by the Monterey Bay Aquarium’s Seafood Watch program.

“The Atlantic Red Crab Company is a great new addition to SCEMFIS,” said Greg DiDomenico, the Chair of SCEMFIS. “Their commitment to sustainability and collaborative research closely aligns with the Center’s mission.”

SCEMFIS, established in 2013, is one of the centers in the National Science Foundation’s Industry-University Cooperative Research Centers program, which facilitates collaborative research between academia and industry. This year, SCEMFIS researchers have published studies on the economic impact of the squid and summer flounder fisheries; how the federal government did not properly consider the impact offshore wind development has on fisheries; the current state of the Atlantic menhaden stock; and ways to improve the management of gray seals and the fisheries that interact with them.

About SCEMFIS

SCEMFIS utilizes academic and fisheries resources to address urgent scientific problems limiting sustainable fisheries. SCEMFIS develops methods, analytical and survey tools, datasets, and analytical approaches to improve sustainability of fisheries and reduce uncertainty in biomass estimates. SCEMFIS university partners, University of Southern Mississippi (lead institution), and Virginia Institute of Marine Science, College of William and Mary, are the academic sites. Collaborating scientists who provide specific expertise in finfish, shellfish, and marine mammal research, come from a wide range of academic institutions including Old Dominion University, Rutgers University, University of Massachusetts-Dartmouth, University of Maryland, and University of Rhode Island.

The need for the diverse services that SCEMFIS can provide to industry continues to grow, which has prompted a steady increase in the number of fishing industry partners. These services include immediate access to science expertise for stock assessment issues, rapid response to research priorities, and representation on stock assessment working groups. Targeted research leads to improvements in data collection, survey design, analytical tools, assessment models, and other needs to reduce uncertainty in stock status and improve reference point goals.

SCEMFIS Research Provides New Insights on Gray Seals; Suggests Alternatives to Current Management

September 28, 2020 — The following was released by the Science Center for Marine Fisheries:

Decades of strict conservation and management have led to a rebound of gray seals in the North Atlantic. Now, research from the Science Center for Marine Fisheries (SCEMFIS) is providing new insights into this population, how local fisheries interact with them, and better options to manage them.

The study, led by Drs. Doug DeMaster, Paula Moreno, Andre Punt, and John Brandon of the Independent Advisory Team for Marine Mammal Assessments, is evaluating how interactions with regional fisheries, specifically the New England sink gillnet and bottom trawl fisheries, affect the gray seal population. Revising estimates for key parameters such as abundance, levels of bycatch, and the proportion of seals crossing between the U.S. and Canada, the study is providing alternative approaches for the National Marine Fisheries Service (NMFS) to estimate Potential Biological Removal (PBR) levels. PBR determines the number of gray seals that can be removed annually by human activities without threatening the conservation status of the stock.

Preliminary results from the study find that calculations made by NMFS to determine the PBR threshold are likely too conservative. Specifically, it finds that NOAA’s estimate of gray seal productivity, a key metric in determining PBR, is too low by approximately 17 percent. It also finds that NOAA is likely being overly conservative in how it classifies at least one fishery, based on productivity, bycatch levels and assumptions regarding transboundary movements of gray seals between the U.S. and Canada.

Under the U.S. Marine Mammal Protection Act (MMPA), bycatch is strictly managed based on PBR levels, and fisheries are often required to adopt burdensome mitigation strategies as a result. Having an accurate estimate of the seal population that is interacting with commercial fisheries, and setting an appropriately precautionary estimate of PBR, is critical not just for seals, but for the fisheries that interact with them.

“With the gray seal population continuing to grow, the fishing industry is increasingly concerned about bycatch and other issues that come from seal interactions,” said Greg DiDomenico, a member of SCEMFIS’ Industry Advisory Board. “The results of this study will provide options for managing gray seals that are both consistent with federal conservation goals and may be helpful in avoiding unnecessarily burdensome regulations on fishermen.”

Read the full release here

SCEMFIS Study Shows Importance of Summer Flounder Fishery to Mid-Atlantic Communities

August 13, 2020 — A new report from the Science Center for Marine Fisheries (SCEMFIS) displays the importance of summer flounder to Mid-Atlantic coastal communities.

SCEMFIS found that $26.5 million worth of fish landed at the docks, generating over $151 million in total sales for wholesalers, retailers and restaurants. Overall, the fishery which operates in New Jersey, Virginia and Rhode Island is responsible for over $259 million in total economic output and over 1,600 direct jobs.

Read the full story at Seafood News

Study Confirms Summer Flounder Fishery Vital for Mid-Atlantic Fishing Communities; $259 Million in Economic Impacts

August 10, 2020 — The following was released by the Science Center for Marine Fisheries (SCEMFIS):

A new economic report reveals a clearer picture of just how valuable summer flounder is for coastal communities in the Mid-Atlantic: $26.5 million worth of fish landed at the docks, generating over $151 million in total sales for wholesalers, retailers, and restaurants, and millions more in indirect impacts.

According to the study from the Science Center for Marine Fisheries (SCEMFIS), the fishery, based largely in Mid-Atlantic states such as New Jersey, Virginia and Rhode Island, is responsible for over $259 million in total economic output. This includes the millions in direct landings and sales, but also $44 million in indirect economic impacts, and over 1,600 direct jobs.

“Summer flounder is one of the cornerstone fisheries of our community,” said Greg DiDomenico, the Chair of SCEMFIS. “It’s important that we’re able to quantify exactly how important it is. It will help us better manage this species and maintain the health of our coastal communities.”

The economic impact of the summer flounder fishery is spread across several sectors of the economy, with a diverse set of indirect economic impacts. In tracking where flounder ends up, the study finds that over half of landings eventually go to restaurants and other foodservice establishments, with the other half going to retail.

The report comes at an important time for the fishery. The most recent summer flounder assessment found that flounder are not overfished, and are not experiencing overfishing. Regulators at both the Mid-Atlantic Fishery Management Council and the Atlantic States Marine Fisheries Commission are currently considering how to reallocate flounder quotas as part of an update to the summer flounder management plan. At the same time, fishermen and coastal communities are dealing with the ongoing impact of the COVID-19 crisis, facing a loss of revenue from decreased sales opportunities. Managers now have critical new information on the benefits and contributions of the commercial fishery to guide their decisions.

Prepared by Thomas J. Murray and Associates on behalf of SCEMFIS, the report draws on information from NOAA landings and market data and interviews with members of the seafood sector.

The SCEMFIS study is one of several that the Center has done to quantify the true economic value of commercially important U.S. fisheries, and complements efforts by NOAA to track the economic contributions of the fishing industry nationally. Part of the National Science Foundation’s Industry-University Cooperative Research Centers program, SCEMFIS brings together leading academics and marine scientists with members of the fishing industry to provide new research on the industry’s unaddressed scientific needs.

Read the full report here

Reports raise questions regarding impact of offshore wind on seafood industry

August 4, 2020 — A pair of new reports from NOAA Fisheries’ Marine Fisheries Advisory Committee (MAFAC) and the Science Center for Marine Fisheries  has raised more questions about how big offshore wind projects – planned for areas of water off the coast of New England in the Northeast U.S. – will impacts the fishing industry in the region.

The science center report calls into question the Bureau of Ocean Energy Management’s investigations of wind energy impacts on seafood, particularly the supplement to the draft environmental impact statement (SEIS) that the bureau released on June. That supplement was intended to examine all of the potential impacts wind energy development – both current and future – could have on the surrounding area.

Read the full story at Seafood Source

New Analysis Shows Minuscule Impact of Fishing on Atlantic Menhaden

August 3, 2020 — The following was released by the Menhaden Fisheries Coalition:

As the Atlantic States Marine Fisheries Commission (ASMFC) considers whether to adopt Ecological Reference Points for Atlantic menhaden at its Summer Meeting this week, a new scientific analysis confirms that current management is working, and that the fishery has a minuscule impact on the overall menhaden population.

The review, conducted by prominent fisheries scientist Dr. Steve Cadrin of the University of Massachusetts Dartmouth at the request of the Science Center for Marine Fisheries (SCEMFIS), found that 99.5 percent of menhaden born each year are left in the water, where they serve as forage for other species and fulfill other ecological roles. Just 0.5 percent of menhaden are harvested by either the reduction or bait fishery.

Especially notable in the review’s findings was the fact that the menhaden fishery harvests very few menhaden under the age of 2, which are the ages at which menhaden are most likely to be consumed by predators. The fishery also rarely harvests older fish that are important for menhaden spawning.

Analyzing a decade’s worth of the most recent data, from 2008-2017, the review indicated that current menhaden harvest levels are extremely precautionary, and that current management is already doing a good job of protecting the ecosystem.

“This review confirms that menhaden management is working for the fishery, the resource, and the environment,” said Wayne Reichle, President of Lund’s Fisheries, a Menhaden Fisheries Coalition member based in Cape May, New Jersey. “The Commission should consider these results while they debate Ecological Reference Points, and before they consider any adjustments to the current menhaden harvest levels.”

In addition to demonstrating the minimal impact of the fishery on the larger menhaden population, the report also noted that the overall biomass for menhaden is “almost the highest on record,” while similarly noting that fishing mortality is “much less than historical levels, much less than the management reference points, and much less than the rate of natural mortality,” part of a trend towards lower mortality and higher biomass that began in the 1990s.

The healthy indicators for the menhaden fishery are in stark contrast to other species, specifically striped bass, which are considered to be overfished. Based on the available evidence from the most recent menhaden assessment, it is unlikely that current issues facing striped bass are a result of insufficient menhaden, given the near-historically high levels of menhaden abundance and low levels of fishing mortality.

The menhaden fishery is also certified sustainable by the Marine Stewardship Council, the preeminent fisheries sustainability certification body.

Dr. Cadrin’s review is part of an overwhelming body of evidence that the menhaden fishery is sustainable and current menhaden management is successful. The Commission should not forget this success as it considers the fishery’s future.

Review Finds 99.5 Percent of Atlantic Menhaden Year Class Stay in Water to Serve Ecological Role

July 30, 2020 — A review conducted by Dr. Steve Cadrin of the University of Massachusetts Dartmouth found that the Atlantic menhaden fishery leaves 99.5 percent of menhaden year class in the water to serve as forage.

Cadrin’s findings are another indication that menhaden is a healthy and sustainable resource, according to the Science Center for Marine Fisheries (SCEMFIS).

Read the full story at Seafood News

SCEMFIS: Federal Offshore Wind Report Paid Lack of Attention to Impacts on Fisheries

July 29, 2020 — Researchers from the Science Center for Marine Fisheries (SCEMFIS) found that the Bureau of Ocean Energy Management’s (BOEM) latest environmental report on offshore wind “paid insufficient attention” to the impact of the practice beyond the Vineyard Wind project.

Last month, BOEM released its supplement to the draft environmental impact statement (SEIS) for the Vineyard Wind project off the Massachusetts coast. The SEIS aimed to analyze the impact of every reasonable offshore wind development on the East Coast in the following years.

Read the full story at Seafood News

99.5 Percent of an Atlantic Menhaden Year Class is Left in the Water to Serve Its Ecological Role, New SCEMFIS Report Finds

July 29, 2020 — The following was released by the Science Center for Marine Fisheries:

The Atlantic menhaden fishery leaves 99.5 percent of a menhaden year class in the water to serve its ecological role as forage, according to a new review from Dr. Steve Cadrin of the University of Massachusetts Dartmouth. This finding is one of many indicators that menhaden is a healthy and sustainable resource, according to the review.

“Determining whether or not menhaden is fulfilling its role in the ecosystem has been at the heart of recent debates around menhaden management,” said Dr. Cadrin. “A review of all the available data from the most recent peer-reviewed stock assessment clearly shows that menhaden are conservatively managed and already successful in meeting ecosystem needs.”

The review comes at the request of the National Science Foundation’s Science Center for Marine Fisheries (SCEMFIS). Dr. Cadrin, a professor of fisheries oceanography and former president of the American Institute of Fishery Research Biologists, previously conducted a review of the Atlantic States Marine Fisheries Commission’s (ASMFC) most recent menhaden stock assessment in February.

Read the full release here