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.

New Study Finds Surfclams Uniquely Resilient in Face of Climate Change

June 20, 2019 — The following was released by the Science Center for Marine Fisheries:

Climate change is one of the most pressing challenges facing the future of marine life, affecting everything from habitats, to migration, to spawning patterns. But new research shows that at least one species has unique features that have allowed it to adapt well to a warming ocean.

The study, published in Marine Ecology Progress Series, finds that surfclams are able to shift their range into previously inhospitable waters as the surrounding oceans temperatures rise. This information will be essential for fisheries managers struggling to effectively manage species in the face of climate change.

The key to this adaptability, according to authors Drs. Jeremy Timbs and Eric Powell, of the University of Southern Mississippi, and Dr. Roger Mann of the Virginia Institute of Marine Science, is the number of larvae that surfclams produce. Ordinarily, surfclams produce a massive amount of larvae, which end up distributed across a wide range of the ocean. Most of these larvae will die from predators, lack of food, or inhospitable temperatures. But the study found that, as ocean temperatures shift, the range of acceptable habitat shifts along with it. Larvae that would have died under cooler conditions now survive, gradually changing where surfclams are located.

“For a sedentary species, surfclams are remarkably adaptable to ocean changes that would cause problems for other shellfish,” says Dr. Powell. “This is especially important for fishermen who depend on surfclams, and who are trying to adapt with the rest of the industry to the challenges posed by climate change.”

The study, which examined 30 years worth of surfclam data, was funded through the Science Center for Marine Fisheries (SCeMFiS). A collaborative project funded through a National Science Foundation grant and support from the fishing industry, SCeMFiS funds groundbreaking research around pressing scientific issues identified by our industry partners.

“Studies like this confirm what we have been seeing since the 1990s, and help us predict the industry’s future,” said Guy Simmons, of SeaWatch International, which is one of the largest harvesters of clams in the country. “We need to work with our partners in the scientific community as we continue to adapt to a changing ocean.”

SCeMFiS Members Attend Seafood Expo North America Following Second National Science Foundation Grant

March 15, 2019 — The following was released by the Science Center for Marine Fisheries:

The Science Center for Marine Fisheries (SCeMFiS) brings together industry and academia to conduct groundbreaking fisheries research, and is the only research center funded by the National Science Foundation (NSF) dedicated exclusively to fisheries science. As a result of its research track record, NSF awarded SCeMFiS a “Phase 2” second 5-year grant to continue its work. This funding shows that SCeMFiS met the high expectations of NSF for Phase 2 approval, a feat that not every Phase 1 center accomplishes.

Industry members of SCeMFiS will attend this year’s Seafood Expo North America and are available to be interviewed.

Factors that contributed to NSF’s determination that SCeMFiS merited a Phase 2 award included:

  • Successfully undergoing a vigorous 5-year NSF review that included external reviewers;
  • Ongoing solid support from contributing industry member companies and organizations;
  • An extremely high retention rate of contributing members;
  • The exemplary quality of research conducted by SCeMFiS principal investigators.

With its newly approved grant, SCeMFiS plans to use the next 5 years to focus on ways to reduce scientific uncertainty in fisheries science; the effects of climate change on fish stocks and fishing communities; resolving issues between fishing and offshore energy interests; and developing sound ecosystem-based fisheries management.

Since its founding in 2013, SCeMFiS has been at the forefront of finfish and shellfish research. Working with members of the fishing industry, SCeMFiS scientists have conducted innovative studies, including producing the first age-frequency distributions for ocean quahog, and being one of the only institutions to study species like chub mackerel and longfin squid.

“The work of our academic partners at SCeMFiS has been vital in improving our understanding of the species we harvest,” said Jeff Reichle, CEO of Lund’s Fisheries, which was one of the original members of the SCeMFiS Industry Advisory Board. “The more we know about these species, the better we’re able to harvest them sustainably.”

The SCeMFiS industry members attending the Seafood Expo are committed to continuing this scientific partnership. Industry members on the SCeMFiS Industry Advisory Board review, approve, and fund all SCeMFiS projects, which are selected to fill gaps in data and meet the industry’s unfilled scientific needs.

“In the last five years, we’ve been able to study and improve the understanding of some of the most pressing scientific issues facing the fishing industry,” said Center Director Dr. Eric Powell, of the University of Southern Mississippi, one of the academic members of SCeMFiS. “We are looking forward to continue our collaborative partnerships and tackle the scientific questions affecting fishermen the most.”

SCeMFiS members will be at the following locations at Seafood Expo North America:

Lund’s Fisheries: Booth 951

Sea Watch International: Booth 423

The Town Dock: Booth 2133

Seafreeze Ltd.: Booth 2407

Bumble Bee

National Science Foundation grant to continue work on key fishery management issues

January 24, 2019 — A cooperative research center that brings together seafood industry leaders and academic experts has received a grant from the National Science Foundation to continue its work on a number of issues that impact sustainable fisheries.

The Science Center for Marine Fisheries (SCeMFiS) will use the federal money to study four issues, including how climate change affects fisheries and how to settle differences between offshore energy producers and the fishing community.

Other research the center will perform as part of the grant will focus on management practices that keep catch limits below levels that reduce jobs and inhibit economic growth. According to a press release from the center, the key focus will be to reduce uncertainty for the commercial industry.

According to the NSF, the grant is worth USD 100,000 (EUR 88,021). Work is expected to start on 1 March and last for five years.

Read the full story at Seafood Source

Science Center for Marine Fisheries Continues Work with New National Science Foundation Grant

January 23, 2019 — The following was released by the Science Center for Marine Fisheries:

Following the completion of its initial 5-year National Science Foundation (NSF) grant, the Science Center for Marine Fisheries (SCeMFiS) has been awarded a new Phase 2 grant by the NSF to continue its work. SCeMFiS will use the new grant to further its track record of quality, collaborative research with its fishing industry and academic partners.

The grant is part of NSF’s Industry/University Cooperative Research Center (IUCRC) program, which was developed to initiate long-term partnerships among industry, academia, and government. SCeMFiS is the only Phase 2 IUCRC program dedicated exclusively to fisheries and marine science research.

“Our new Phase 2 grant will allow SCeMFiS researchers to continue our collaborative work with the fishing industry,” said Center Director Dr. Eric Powell, of the University of Southern Mississippi, one of the academic members of SCeMFiS. “The Phase 2 grant will enable SCeMFiS to continue to fund the groundbreaking research necessary to maintain healthy fish stocks and healthy fisheries at a time when reliance on the best available science is increasingly critical.”

As it moves into Phase 2, SCeMFiS will focus on reducing scientific uncertainty; the effects of climate change on fish stocks and fishing communities; resolving issues between fishing and offshore energy interests; and developing sound ecosystem-based fisheries management.

“Our priorities for Phase 2 reflect the biggest challenges in the future of the fishing industry,” said Center Site Director Dr. Roger Mann, of the Virginia Institute of Marine Science, another SCeMFiS academic institution. “To meet these challenges, the industry and fisheries managers will need the kind of innovative research that SCeMFiS has regularly produced over the last 5 years.”

In its first 5 years, SCeMFiS has done groundbreaking research on finfish and shellfish. Among other projects, the Center produced the first age-frequency distributions for ocean quahog, one of the longest-lived species in the ocean. SCeMFiS scientists conducted the first benthic survey on important ocean habitat east of Nantucket, and mapped the shifting range of surfclams, documenting how climate change is beginning to affect the species.

SCeMFiS has also designed a pelagic survey for Atlantic menhaden and provided recommendations to improve port sampling for the species, carried out the only scientific work to date on Atlantic chub mackerel, and carried out an economic analysis for longfin squid.

All of these projects were reviewed, approved, and funded by the industry members on our Industry Advisory Board, who rely on sound science for the health of their fisheries and businesses.

“Fisheries management is only as good as the science it’s based on,” said Greg DiDomenico, Executive Director of the Garden State Seafood Association and a member of SCeMFiS’ Industry Advisory Board. “That’s why it’s so important for the fishing industry to maintain its partnership with SCeMFiS. We need to promote the best available science.”