Atlantic menhaden Archives

Pilot Study Announced as Possible StepToward Bay-Specific Menhaden Data

May 7, 2026 — Critics of commercial menhaden fishing in the Chesapeake Bay have called for Bay-specific science. The Science Center for Marine Fisheries (SCEMFIS) announced a pilot is advancing that may be able to provide it.

SCEMFIS announced that a research team is preparing to test whether a method called Passive Integrated Transponder, or PIT tagging, can help fill key data gaps.

PIT tags are tiny devices inserted into fish, and when those fish later pass a detection point, the tag can be read—allowing scientists to track data such as movement, survival, and other patterns.

Read the full article at News On The Neck

Menhaden group claims ASMFC applied a double standard on economic impacts

May 6, 2026 — An analysis released by the Menhaden Fisheries Coalition argues that federal fisheries managers treated economic concerns differently when weighing striped bass and menhaden management decisions at last year’s annual meeting of the Atlantic States Marine Fisheries Commission (ASMFC).

The report titled “When Jobs Count, and When They Don’t,” compares discussions from the Atlantic Striped Bass and Atlantic Menhaden management board meetings held during the ASMFC’s 2025 Annual Meeting.

According to the analysis, socio-economic impacts were a central factor in the striped bass debate, where commissioners ultimately opted for a proposed 12 percent reduction in harvest despite the stock being below target levels. Instead, the board maintained the status quo and formed a work group with representation from multiple sectors.

During that meeting, speakers and board members repeatedly cited the potential impacts on charter operators, recreational businesses, tackle manufacturers, and coastal economies.

In contrast, the report says similar concerns raised during the menhaden discussion, particularly those tied to industrial fishing jobs, did not carry the same weight in the final decision.

Read the full article at the National Fisherman

Atlantic Menhaden Recertified for Another Five Years as a Marine Stewardship Council Sustainable Fishery

May 5, 2026 — The Atlantic menhaden fishery has been recertified as sustainable according to Marine Stewardship Council (MSC) standards. The recertification once again confirms that the fishery is environmentally sustainable and effectively managed.

The Marine Stewardship Council is the international gold standard for seafood sustainability and has one of the most rigorous certification programs in the world. All fisheries certified under the MSC benchmarks must undergo an independent third-party audit to confirm that they adhere to MSC standards.

MSC evaluates fisheries according to 28 separate sustainability criteria. These criteria are divided among three principles: the sustainability of the fishery, whether the fishery has minimized its environmental impact, and the effectiveness of its management. In order to be certified, fisheries must achieve a score of at least 60 on all 28 criteria. The fishery averaged a score of more than 80 for all three of the principles measured, scoring an 86.7 on the health of the species, 82.0 on its ecosystem impacts, and 96.3 on its management system.

Three companies, Ocean Harvesters and Omega Protein in Virginia, and Lund’s Fisheries in New Jersey, represent the ‘client group’ supporting this MSC assessment.

“Our operations are focused on ensuring that everything we do is sustainable and based on ecologically sound management practices, and this recertification reflects that,” said Ben Landry, Vice President of Public Affairs for Ocean Fleet Services. “The Atlantic menhaden fishery is one of the most sustainable fisheries on the East Coast, and with this recertification, we will continue to be good stewards of the Chesapeake Bay and the resource.”

The Atlantic menhaden fishery was first certified in 2019. MSC-certified fisheries are required to undergo the recertification process regularly to ensure that they still meet the organization’s high standards.

“For nearly ten years, Lund’s Fisheries has collaborated with the MSC to assure domestic and international markets, vitally important to our long-term success, that the seafood we produce is managed sustainably based on the rigorous, annual, scientific and monitoring reviews that are the core of the MSC program.” said Wayne Reichle, President of Lund’s Fisheries.

The menhaden fishery operates primarily in Virginia and in federal waters off the coast of New Jersey. In Virginia, where the fishery has operated out of Reedville since the 1870s, the menhaden purse seine fishery harvests menhaden for use in marine ingredients such as fish meal and fish oil. In New Jersey, the purse seine fishery operating out of Cape May is a key source for menhaden used as bait in the Atlantic lobster and crab fisheries and Gulf crab and crawfish fisheries. Both fisheries are integral to their local fishing economies and coastal communities.

This MSC recertification reflects the most recent science on the health of the Atlantic menhaden resource and confirms that the fishery is being managed sustainably, for the future. According to the Atlantic States Marine Fisheries Commission, the interstate body that manages menhaden, the species is not overfished, and overfishing is not occurring.

About the Menhaden Fisheries Coalition

The Menhaden Fisheries Coalition (MFC) is a collective of menhaden fishermen, related businesses, and supporting industries. Comprised of businesses along the Atlantic and Gulf coasts, the Menhaden Fisheries Coalition conducts media and public outreach on behalf of the menhaden industry to ensure that members of the public, media, and government are informed of important issues, events, and facts about the fishery.

TRCP Video Series Is Latest Campaign to Spread Falsehoods About Atlantic Menhaden Fishery

May 5, 2026 — The following was released by the Menhaden Fisheries Coalition:

A recent video series from the Teddy Roosevelt Conservation Partnership continues the organization’s near decade-long practice of spreading misinformation about the Atlantic menhaden fishery. From substituting anecdotes for real science to misidentifying the companies involved in the fishery to mischaracterizing the state of the stock, the videos paint a misleading picture of a sustainable and economically vital fishery.

Menhaden Are Important — But the “Most Important Fish in the Sea” Claim Is Misleading

The videos repeatedly refer to menhaden as “the most important fish in the sea,” which also serves as the title for the series. This phrase comes from the title of a 2007 book by H. Bruce Franklin, a former Rutgers University English professor. While menhaden are an ecologically and economically important species, the moniker of “most important fish in the sea” has historically been misused by industry opponents to suggest that menhaden play an outsized role in the ecosystem compared to other forage species. This is not borne out by the science.

A 2015 analysis of the diets of five major predator species in the Chesapeake Bay found that Atlantic menhaden was not one of the top four most important prey species. Menhaden was found to be significant for just one predator, striped bass, while bay anchovy was significant for four of the species and was even more important for striped bass than menhaden. Similarly, a 2025 study of Gulf menhaden using cutting-edge stable isotope analysis found that they do not play an outsized role in predator diets and that there is no “most important” prey species in the Gulf.

Anecdotes Are Not a Substitute for Science

Besides misleading monikers, the videos frequently use anecdotes as stand-ins for real science. In one video, a drone operator states that she saw menhaden on 76 days in 2023, and just 24 days in 2025. In another, a filmmaker states that she is seeing fewer menhaden inshore, while a few years ago there were “acres and acres of menhaden all summer long” and “you could almost walk on [them].” She also falsely states that the “biggest threat facing menhaden is overfishing.”

While the observations of those on the water can in some cases guide sound science, individual anecdotes are not a substitute for the work of numerous scientists and fisheries managers who have found the menhaden population is healthy and sustainable. The Atlantic States Marine Fisheries Commission (ASMFC) has repeatedly found that menhaden are not overfished and overfishing is not occurring. Moreover, the fishery is certified sustainable by the Marine Stewardship Council (MSC), the international gold standard for seafood sustainability.

The Videos Misidentify the Companies Involved in the Fishery

Another video featuring a charter captain is replete with falsehoods. In it, the captain accuses an “industrial company, Omega [Protein]” of “taking more than the Bay can handle — it’s not sustainable.” This is not only incorrect on the merits — again, the fishery is managed for sustainability by the ASMFC and has been certified sustainable by MSC — but also misidentifies the company that harvests fish. Fishing is conducted by Ocean Harvesters, an American company based in Reedville, Virginia; Omega Protein is a processing company that does no fishing.

Sustainability Is Measured by Science, Not Visual Impressions

The charter captain further states, “you can sit out here and watch them pull up a gigantic net full of [menhaden] and you look at it and it’s like ‘how is that sustainable?’” The size of the net has nothing to do with the sustainability of a species that is measured in millions of metric tons. The menhaden fishery adheres to quotas set by federal managers and states based on the best available science. That is how sustainability is measured — not by the size of individuals nets.

The Osprey Narrative Ignores Scientific Complexity

The video series also features frequent fishery detractor Chris Moore of the Chesapeake Bay Foundation continuing to drive the narrative that menhaden fishing is responsible for problems with osprey productivity in the Bay. This claim is echoed by Remy Moncrieffe of the National Audubon Society, who states that a “lack of science in regards to the menhaden population, especially in the Bay, is one of the biggest deterrents we have towards effectively managing menhaden.”

Menhaden is one of the most studied fish species on the Atlantic coast. Menhaden fishery members have partnered with the Science Center for Marine Fisheries for the past decade, leading to numerous scientific publications and graduate-level theses. Landings data from the industry is used by NOAA scientists and the ASMFC in their menhaden stock assessments. And the industry is supportive of a new effort to produce a research roadmap for menhaden in the Chesapeake Bay.

There is no scientific consensus that menhaden fishing is related to osprey issues in the Bay. U.S. Geological Survey (USGS) scientists have pointed out that osprey populations have leveled off in numerous areas around the country, including places like California and Washington where there are no menhaden, and that there are numerous environmental factors that impact osprey productivity. Fisheries scientists have also questioned the statistical basis that some avian researchers used to draw a link between menhaden fishing and osprey.

Menhaden Is Already Managed With Extraordinary Precaution

The videos call for “more precautionary management” of menhaden “while we get more science,” ignoring the fact that menhaden are already managed with extraordinary precaution, including the use of ecological reference points specifically designed to account for predator needs. This call echoes a TRCP petition to remove the fishery from the Chesapeake Bay, which would effectively lead to its shutdown. The idea of shuttering a fishery that has operated continuously for nearly 150 years, is not overfished nor experiencing overfishing, and is certified sustainable by the world’s preeminent seafood certifier flies in the face of all traditional fisheries management. Advocacy videos from TRCP using anecdotes, mischaracterizations, and straight up falsehoods do not change the truth about this fishery.

About the Menhaden Fisheries Coalition

SCEMFIS-Supported Menhaden Research Advances Work Toward a Scientifically Based Chesapeake Bay Harvest Cap

May 4, 2026 — The following was released by the Science Center for Marine Fisheries:

Last October, the Science Center for Marine Fisheries (SCEMFIS) funded a team of leading Atlantic menhaden researchers to develop a roadmap identifying the research needed to develop a scientifically defensible and ecologically meaningful Chesapeake Bay harvest cap.

The project brings together experts from the Batten School of Coastal and Marine Sciences & VIMS at William & Mary, the Chesapeake Biological Laboratory (CBL) at the University of Maryland Center for Environmental Science (UMCES), and NOAA, combining decades of experience in peer-reviewed menhaden research, stock assessments, ecological modeling, and survey design.

SCEMFIS, a member of the National Science Foundation’s Industry-University Cooperative Research Program, brings scientists and industry together to fund and conduct applied marine fisheries research. Since the project began, the research team has worked collaboratively online and met in person in February in Solomons Island, Maryland, to review progress and plan next steps.

The roadmap project will produce final recommendations by the end of the year. Those recommendations are expected to include proposed methodologies, timelines, and costs for additional research needed to support development of a scientifically based Chesapeake Bay harvest cap.

At the SCEMFIS spring 2026 meeting in Nashville, Dr. Robert J. Latour, Professor at the Batten School of Coastal and Marine Sciences & VIMS, outlined the work completed so far and described how the team is evaluating potential methods to generate the Bay-specific data needed to support future management decisions for Atlantic menhaden.

Dr. Latour explained that Atlantic menhaden have been the focus of significant scientific and management attention because of their dual role as an important forage species and the basis for a long-standing commercial fishery. In the Chesapeake Bay, managers have sought to balance fishery removals with menhaden’s ecological role, including through the existing Bay landings cap. However, Dr. Latour noted that the current cap is not a scientifically derived biological reference point, but rather a precautionary limit based on average historical catch.

The research team’s work is intended to help identify what information would be needed to move from a precautionary cap toward a biologically-based management framework. That includes determining how to estimate local menhaden abundance, fishing mortality, movement between the Bay and coastal waters, and menhaden availability to predators.

As part of that effort, the team will begin a pilot study to test whether Passive Integrated Transponder, or PIT, tagging can be used to generate information that existing historical datasets cannot provide. PIT tags are small tags that are injected into fish and can be detected later if the fish pass through a receiver system.

“Tagging is one potentially promising option available to us to establish a Bay cap that is grounded in the best available science,” said Dr. Genny Nesslage, Associate Research Professor at the Chesapeake Biological Laboratory and leader of the menhaden roadmap project. “We are ultimately looking for research recommendations that prioritize accuracy, timeliness, and efficiency.”

The team is building on historic menhaden tagging work, including large-scale tagging efforts from the 1960s, while adapting modern technology to address current management questions. This type of tagging data can potentially help estimate exploitation and total abundance, two of the central questions surrounding Chesapeake Bay menhaden management.

The proposed tagging pilot project will include two major components.

First, researchers will conduct controlled holding studies at VIMS to evaluate whether the tagging process affects menhaden survival. Fish will be collected from the field, acclimated to captivity, and placed into trials in which all fish are handled the same way, except that some receive PIT tags and others do not. These trials will help determine whether the act of tagging itself affects survival and whether the method can produce reliable data.

Second, on May 12, the research team will visit Ocean Harvesters to begin planning field trials designed to determine whether tagged menhaden can be reliably detected during commercial fishing operations. Ocean Harvesters, which supplies menhaden to Omega Protein, has agreed to open its doors to the research team and work with them to determine how PIT tags could be retrieved on an ongoing basis while the fishery is underway. Researchers will evaluate whether receivers can be placed in the pump hose, on the chute where fish enter the vessel holds, or at Omega Protein’s processing facility as menhaden are processed. The field trials will involve placing known numbers of tagged fish into catches and measuring whether detection systems can reliably identify them under real-world harvesting and processing conditions.

The tagging concept is one piece of the broader SCEMFIS-supported roadmap project. The team is also considering other potential methods for generating Bay-specific data, including acoustic and LiDAR surveys, environmental DNA, stable isotope analysis, and other approaches that could help measure local abundance, movement, and predator consumption.

The tagging feasibility study, if successful, would provide an important early test of whether modern tagging technology can help answer some of the most challenging questions facing Atlantic menhaden management in the Chesapeake Bay.

Project Team

Selected qualifications in Atlantic menhaden and Chesapeake Bay

Robert J. Latour, Ph.D., Professor, Batten School of Coastal and Marine Sciences & VIMS, William & Mary

Quantitative fisheries ecologist focusing on predator-prey interactions, population dynamics, and habitat modeling. Lead/co-author of the 2023 study on female Atlantic menhaden reproductive biology and fecundity and co-author, with Gartland, of Virginia’s 2023 Atlantic Menhaden Research Planning report to the General Assembly and Secretary of Natural and Historic Resources.

James Gartland, Ph.D., Senior Research Scientist, Batten School of Coastal and Marine Sciences & VIMS, William & Mary

Quantitative fisheries scientist with extensive experience in the development of fisheries monitoring surveys, prey consumption models, and ecological indicators, including in Chesapeake Bay. Co-author of the 2023 menhaden fecundity study with Latour and Schueller and co-author of Virginia’s 2023 Atlantic Menhaden Research Planning report guiding Bay-specific research priorities.

Genevieve M. Nesslage, Ph.D., Associate Research Professor, CBL, UMCES

Quantitative fisheries scientist with research focusing on Atlantic menhaden spawning locations and larval dispersal, fishery sampling, survey design, overwintering habitat use, and predator-prey modeling. Former Senior Stock Assessment Scientist at the Atlantic States Marine Fisheries Commission.

Michael J. Wilberg, Ph.D., Professor of Fisheries Science, CBL, UMCES

Fisheries stock assessment and management strategy evaluation specialist with research focused on Atlantic menhaden movement, mortality, growth, and predator-prey modeling. Lead author of the 2020 survey design for Atlantic menhaden in Chesapeake Bay.

Amy M. Schueller, Ph.D., Research Fish Biologist, NOAA Southeast Fisheries Science Center

Lead assessment analyst for Atlantic and Gulf menhaden and key contributor to the working group on ecological reference points, or ERPs, that underpin Atlantic menhaden management.

About SCEMFIS

The Science Center for Marine Fisheries (SCEMFIS) brings together academic and industry expertise to address urgent scientific challenges facing sustainable fisheries. Through advanced methods, analytical tools, and collaborative research, SCEMFIS works to reduce uncertainty in stock assessments and improve the long-term sustainability of key marine resources.

SCEMFIS is an Industry-University Cooperative Research Center supported by the National Science Foundation. Industry organizations join SCEMFIS through an Industry Membership Agreement with one of the center’s site universities and contribute both financial support and valuable expertise to help shape research priorities.

Its university partners include the University of Southern Mississippi (lead institution) and the Virginia Institute of Marine Science at the College of William and Mary. The center also collaborates with scientists from a broad network of institutions, including Old Dominion University, Rutgers University, the University of Massachusetts-Dartmouth, the University of Maryland, and the University of Rhode Island. These researchers bring deep expertise in finfish, shellfish, and marine mammal science.

Demand for SCEMFIS’s services continues to grow, driven by the fishing industry’s need for responsive, science-based support. The center provides timely access to expert input on stock assessment issues, participates in working groups, and conducts targeted studies that lead to better data collection, improved survey design, and more accurate modeling-all in service of sustainable, science-driven fishery management.

Analysis: ASMFC Shows Double Standard on Jobs and Economic Impacts in Striped Bass and Menhaden Management

May 4, 2026 — The following was released by the Menhaden Fisheries Coalition:

An MFC analysis of two board meetings held as part of the 2025 Annual Meeting of the Atlantic States Marine Fisheries Commission last Fall finds that the Commission treated socio-economic impacts as central to striped bass management decisions, while giving less practical weight to comparable concerns raised by the menhaden reduction industry, including vessel crews, plant workers, union families, and local communities dependent on the fishery.

The analysis, titled “When Jobs Count, and When They Don’t,” compares the Atlantic Striped Bass Management Board meeting and the Atlantic Menhaden Management Board meeting, both held as part of the ASMFC’s 2025 Annual Meeting. The analysis examines how much attention each Board gave to jobs, business impacts, working waterfronts, associated industries, and the livelihoods of people directly affected by regulation.

In the Atlantic Striped Bass Management Board meeting, speakers and commissioners repeatedly discussed the economic consequences of further restrictions for charter boats, for-hire operators, commercial fishermen, recreational fishing businesses, tackle manufacturers, bait suppliers, hotels, restaurants, fuel businesses, and coastal communities. Those concerns helped shape the outcome: the Board decided not to move forward with the proposed 12 percent reduction in fishery removals, despite consensus that the striped bass population is below its Target population. Instead, the Board chose status quo rather than an additional reduction and created a work group to examine the future of striped bass management with representation from “all sectors.”

In the Atlantic Menhaden Management Board meeting, representatives of the menhaden reduction fishery described local jobs, generational labor, family livelihoods, harassment of fishermen, bait-market impacts, and the economic dependence of workers in and around Reedville, Virginia. Ocean Harvesters’ CEO Monty Deihl stated that “100 percent” of Ocean Harvesters and Omega Protein employees are U.S. residents and that “94 percent live within 15 miles of that plant.” Retired UFCW Local 400 representative Kenny Pinkard told the Board, “I speak for all working people in Virginia,” and reminded commissioners that their decision affected “the livelihood of these gentlemen behind me.”

Yet despite that testimony, the Atlantic Menhaden Management Board moved forward with an immediate 20 percent reduction for 2026, even with the menhaden stock having been recently announced to be healthy, not overfished and not experiencing overfishing. The analysis argues that, while the Board acknowledged menhaden-related economic concerns, it did not treat them with the same depth, breadth, or procedural seriousness shown in the striped bass debate.

“The Atlantic Striped Bass Management Board meeting and the Atlantic Menhaden Management Board meeting at the ASMFC’s 2025 Annual Meeting show that the ASMFC knows how to consider human consequences when it chooses to,” the analysis concludes. “The question is why charter trips, tackle sales, hotels, restaurants, and recreational access receive more visible concern than union jobs, plant workers, vessel crews, and working families in the menhaden industry.”

The analysis does not argue that the ASMFC ignored socio-economic concerns in the menhaden meeting. Rather, it argues that those concerns were treated differently. In the striped bass meeting, economic harm helped justify status quo, a broader work group, and a management posture focused on preserving access and industry viability. In the menhaden meeting, socio-economic harm helped moderate the severity of the reduction but did not prevent an immediate cut or produce a comparable worker-centered process.

The result, according to the analysis, is a revealing double standard: socio-economic impacts appear to become management-relevant when they affect the striped bass recreational, charter, and associated service economy, but receive less forceful treatment when they affect the menhaden reduction industry and its workforce.

Read the full analysis, “When Jobs Count, and When They Don’t.”

Two Independent Reviews Find No Evidence that Virginia’s Menhaden Season Is ‘Blocking’ Fish from Reaching Maryland Pound Nets

May 4, 2026 — The following was release by the Menhaden Fisheries Coalition:

A proposed Atlantic menhaden management addendum aimed at Virginia’s Chesapeake purse seine fishery is being driven by a simple claim: that a shift in the timing of the reduction fishery has reduced menhaden availability farther north, contributing to lower Maryland pound net harvests.

Two separate analyses, one statistical and one oceanographic, reach the same conclusion: the available evidence does not support the “gauntlet” theory. Instead, both studies suggest Maryland pound net results are better explained by (1) changes in fishing effort and (2) Bay conditions that affect where fish can live and how catchable they are.

The analyses were submitted to the Atlantic States Marine Fisheries Commission’s Atlantic Menhaden Management Board in a comment letter from Ocean Harvesters.

The ASMFC Atlantic Menhaden Management Board’s Plan Development Team (PDT), the staff group tasked with drafting the proposed addendum, has already signaled that the addendum’s core premise warrants deeper scientific review. In a memo to the Board, the PDT recommended referring the proposal to the menhaden Technical Committee (TC) as “a more appropriate avenue to conduct a detailed analysis” of the central claim driving the addendum: that a recent shift in timing of the Chesapeake Bay reduction fishery has reduced fish availability in the upper Bay and, in turn, reduced Maryland pound net harvests.

These two studies support that recommendation by challenging the “blocking” narrative and highlighting alternative explanations rooted in measurable environmental conditions.

1) What the numbers say: when Virginia sets are high, Maryland catch-per-trip tends to be high too

The first study was conducted by Georgetown Economic Services (GES) using commonly referenced data sources: Virginia purse-seine “net sets” and Maryland pound net landings and trips.

If the Virginia reduction fishery is preventing menhaden from reaching Maryland, then Maryland’s catch-per-trip should fall when Virginia activity rises.

That’s not what the data show.

GES calculated Maryland “harvest per trip” (a common way to express catch rate) and compared it month by month against the number of Virginia purse-seine sets, while accounting for normal seasonal patterns.

Result: the relationship was positive and statistically meaningful. The “net sets” coefficient was 2.4063 with a p-value of 0.0289, meaning the relationship is unlikely to be random noise.

Put plainly:

When Virginia set activity is higher, Maryland’s menhaden catch per trip tends to be higher.
When Virginia set activity is lower, Maryland’s menhaden catch per trip tends to be lower.

GES notes it’s “highly unlikely” that one fishery is impacting the other; the more reasonable interpretation is that both fisheries are responding to the same underlying condition: how many fish are present and available in the Bay at a given time.

This is the opposite of what you’d expect if a lower-Bay “gauntlet” were systematically starving the upper Bay of fish.

2) What the Bay’s physics say: water conditions can change where menhaden concentrate, without any “interception”

The second study was prepared by Dr. Arnoldo Valle-Levinson, a University of Florida professor who specializes in how water moves through estuaries and how that movement shapes conditions in places like the Chesapeake.

Rather than starting with fishing narratives, this analysis starts with a basic reality of the Chesapeake Bay: summer conditions can squeeze fish into smaller “livable” layers of water, and those shifts can make fish easier or harder to catch depending on location and gear.

A simple but critical point: catches fell, but effort fell too; catch rate did not steadily collapse

Dr. Valle-Levinson first looked at Maryland pound net time-series patterns:

Maryland menhaden catches show a decreasing trend over the last 12 years.
Maryland trips (effort) also show a decreasing trend.
The two “go hand in hand.”
Importantly, catch per unit of effort (catch/trip) “has not changed over time,” despite a marked dip in 2024.

That matters for public understanding: lower landings do not automatically mean fewer fish are available. Sometimes, it means fewer trips are being made.

The “hypoxia” effect: when oxygen drops, fish habitat compresses, and catches can rise

The report then evaluates how hypoxia (low oxygen levels in the water) relates to catch patterns. It tracks hypoxic depth, essentially, how far down you have to go before oxygen becomes too low for many fish.

Dr. Valle-Levinson finds that Maryland catches and catch rates show a consistent linkage with hypoxia depth over annual cycles. In practical terms, the analysis indicates that catches increase when the low-oxygen zone rises (when hypoxic depth becomes shallower), a pattern consistent with fish being pushed into a smaller oxygenated layer, making them more concentrated and more catchable.

Stratification and river flow: the upstream “push” that can set the stage

The report also finds that:

River discharge in the upper Bay relates to water-column stratification in the mid-Bay (how strongly the Bay separates into layers).
River discharge relates to hypoxic depth.
Stratification is linked to Maryland catches and catch rates, especially at deeper mid-Bay stations.
There is also evidence that increased discharge is linked to increased Maryland catch with a time lag (months).

The submission summarizes this chain in a way that’s easy to visualize: more freshwater flow → stronger layering → stronger hypoxia/habitat compression → fish concentrate → catches can rise.

The report even includes a plain-language schematic (“The estuary cascade”) illustrating how high-flow seasons can contribute to stratification, expand low-oxygen conditions, compress fish habitat, and increase pound net catches, again, without invoking any “interception” mechanism.

About Dr. Arnoldo Valle-Levinson

Dr. Valle-Levinson is a Professor in the University of Florida’s Department of Civil and Coastal Engineering and currently serves as a Program Officer for Physical Oceanography at the National Science Foundation.

He is the author of the textbook, Introduction to Estuarine Hydrodynamics(Cambridge University Press, 2022); and the Editor of Contemporary Issues in Estuarine Physics (Cambridge University Press, 2010).

Accountability Certified: Louisiana’s Most Scrutinized Fishery Just Got Recertified Sustainable. Here’s What the Science Actually Shows.

April 6, 2026 — The Gulf menhaden fishery has earned its first recertification from the Marine Stewardship Council (MSC) – the world’s leading certification body for sustainable fisheries – reaffirming its environmental performance and science-based management following a rigorous, multi-year independent audit.

The MSC is the world’s leading certification body for sustainable fisheries, and the 2026 recertification provides third-party verification that the fishery continues to meet the highest standards for sustainability, ecosystem health, and effective management. MSC certifications are valid for five years, with annual surveillance audits to ensure ongoing compliance. A full recertification – including public comment and the opportunity for objections – is required every five years. The fishery was first certified in 2019.

The MSC process is exhaustive, examining every dimension of the fishery’s performance: stock health, bycatch rates, environmental impacts, and regulatory oversight. Fisheries must meet strict scoring thresholds across all categories, with any deficiencies requiring time-bound corrective action.

The Marine Stewardship Council is an independent, international nonprofit organization that sets the world’s leading standard for sustainable fishing. Its certification program is science-based, globally recognized, and relies on third-party auditors, transparent public input, and continuous monitoring to ensure fisheries meet the highest benchmarks for environmental performance and accountability.

The Gulf menhaden fishery successfully addressed all conditional scores from its first certification, demonstrating continuous, measurable improvement.

Read the full article at The Advocate

The man who keeps the menhaden fleet running

March 25, 2026 — Out of Empire, Louisiana, the menhaden fleet doesn’t just catch fish. It sustains families, funds local businesses, and anchors one of the few steady industries in low Plaquemines Parish. And when something goes wrong on the water, Casey Devillier is the one who fixes it.

The Louisiana Commercial Fishing Coalition shared Devillier’s story. He has worked for Westbank Fishing for 23 years, and though his title is vessel manager, the role goes far beyond the name. “I handle anything electrical on the boats. And that ends up being a lot.”

He oversees 12 menhaden fishing vessels and 24 smaller purse boats, each relying on interlocking systems- engines, generators, refrigeration, hydraulics, radar, autopilot, steering controls, and onboard electronics. When any one of them fails during the short fishing season, the clock starts ticking immediately.

“The main engines are critical,” he says. “But refrigeration is just as important. If that goes down, you have serious problems.”

Read the full article at the National Fisherman

NASA joins SCEMFIS advisory board, bringing satellite data to fisheries research

March 10, 2026 — The Science Center for Marine Fisheries (SCEMFIS) has announced that researchers from NASA’s Earth Science Division have joined the center’s Industry Advisory Board, a move aimed at expanding the use of satellite-based ocean data in fisheries science.

The partnership is expected to strengthen collaboration between NASA scientists and the fishing industry while helping SCEMFIS integrate earth observation data into future research projects focused on commercially important species and ocean conditions.

Read the full article at the National Fisherman