Virginia Institute of Marine Science Archives

Scientists Are Trying to Keep Sharks From Commercial Lines

August 5, 2019 — Scientists at the Virginia Institute of Marine Science in Wachapreague are doing research this summer that could result in a way for commercial fishermen to keep sharks from interfering with their fishing lines.

VIMS Eastern Shore Lab has the advantage of being right on the water and near the last undeveloped stretch of barrier islands on the East Coast.

“There is only one lab in all of Virginia that has running seawater, which you need to keep sharks,” said VIMS scientist Richard Brill.

That lab is in Wachapreague.

Read the full story at U.S. News

Chesapeake Bay health dips, but still rates a C in annual report card

May 22, 2019 — Bay health took a hit from record rainfall last year, but experts claim the Chesapeake’s growing resilience managed to keep a bad situation from getting worse.

The 2018 Chesapeake Bay Report Card was released by the University of Maryland Center for Environmental Science, one of several groups that assess the bay’s health each year. It put the bay’s overall score at 46% — a drop from the previous year’s 54%, but still a C on its 20-point grading scale.

Bay resilience is critical because very wet years may no longer be an anomaly. Climate models predict an increase in weather extremes, and local marine experts are seeing some evidence of that.

“We’re encouraged that, in spite of the fact that we had a major insult to the bay with all the runoff and rainfall in 2018, that we took a dip but we didn’t crash,” said Bill Dennison, vice president for science applications at the center.

“Many of the living resources appear to be fairly resilient,” said Mark Luckenbach, associate director for research and advisory services at the Virginia Institute of Marine Science. “But we need to understand that that’s likely to become more frequent — these really high rainfall events.”

VIMS, affiliated with the College of William and Mary, collected much of the data used to compile the report, particularly for bay-wide seagrass, Virginia fish and blue crabs.

Read the full story at The Daily Press

VIMS: Antarctic krill declines as South Atlantic Ocean warms

February 4, 2019 — When biological oceanographer Deborah Steinberg bundles up and steps onto the deck of the Laurence M. Gould research vessel, this is what she sees: ice, ice and more ice.

“I see icebergs, I see sea ice, I see crabeater seals floating by on ice floes, the mountains of the Antarctic Peninsula,” Steinberg said in a shipboard phone interview Friday. “It’s gorgeous.”

But it’s what she can’t see, what lies beneath the icy waters of the South Atlantic Ocean off northwestern Antarctica, that concerns Steinberg and an international team of marine researchers: krill.

Read the full story at the Daily Press

VIRGINIA: Watermen get say on how to tackle ‘ghost pots’ in the Chesapeake Bay

January 29, 2019 — “Ghost pots” remain a menace in the Chesapeake Bay, but how big a menace and what to do about them is anybody’s guess.

That could change now that the 1,056 hard crab fishermen licensed in Virginia are getting a chance to have their say.

Researchers at the Virginia Institute of Marine Science are mailing surveys to watermen asking for their ideas on the countless crab pots that, for any number of reasons, end up haunting the bay, trapping and killing crabs and other hapless creatures that crawl or swim inside.

“This is really to try to find out, what do the watermen want, what do they think,” said Jim DelBene, the VIMS graduate student who developed the Derelict Blue Crab Pot Survey.

In doing so, he researched what other states with blue crab fisheries, from Connecticut through Texas, are doing to reduce ghost pots. He sought out experts at VIMS and at the Virginia Marine Resources Commission and held focus groups for commercial watermen to help choose and frame the survey questions.

Read the full story at the Daily Press

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.”

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.

Oyster aquaculture limits disease in wild oyster populations

December 17, 2018 — A fisheries researcher at the University of Rhode Island has found that oyster aquaculture operations can limit the spread of disease among wild populations of oysters. The findings are contrary to long-held beliefs that diseases are often spread from farmed populations to wild populations.

Read the full story from the University of Rhode Island at Phys.org

Science Center for Marine Fisheries Funds Three New Projects at Fall Meeting

November 28, 2018 — The following was released by the Science Center for Marine Fisheries:

At its fall meeting in Middletown, Rhode Island, the Industry Advisory Board of the Science Center for Marine Fisheries (SCeMFiS) awarded over $164,000 in grants for promising new marine science research.

The projects cover the impact of climate change on shellfish populations; how to properly determine the age of one of the ocean’s longest-lived species; and how offshore wind energy is likely to affect fisheries. All of the funded projects further the mission of the Center, which connects leading researchers and their partners in the industry to address critical marine science needs.

As part of the National Science Foundation’s Industry/University Cooperative Research Program, SCeMFiS used this meeting to set the shared priorities of our researchers from around the country and the industry advisors from the shellfish and finfish fisheries who approved the research.

“We see this as a great opportunity to partner with the scientific community, and we are looking forward to continue working with SCeMFiS on projects that affect our fisheries,” said Meghan Lapp, the Fisheries Liaison for Seafreeze, one of SCeMFiS’ Rhode Island members.

A full description of the funded projects is included below:

“The influence of global warming on the Atlantic surfclam and the ocean quahog” – Dr. Eric Powell (University of Southern Mississippi) and Dr. Roger Mann (Virginia Institute of Marine Science) will lead the study, which will examine the extent to which the populations of surf clams and ocean quahogs have shifted offshore in response to changing ocean temperatures. The study will sample and date ocean quahog and surfclam shells to identify the likelihood of a continued future shift in the species’ range. ($56,197 in funding approved)

“Ocean quahog population dynamics: validation of estimation procedures for an age-at-length key – supplement” – Dr. Powell and Dr. Mann will follow up on previous SCeMFiS research on how to properly age ocean quahogs in the northwest Atlantic. Ocean quahogs can live to over 200 years old, but their growth rates vary considerably over time. The study would continue efforts to develop a reliable way to estimate ocean quahog ages at particular lengths, known as an age-at-length key. ($29,037 in funding approved)

“Oceanography special issue on the effects of wind energy development on fisheries and the ecology of the continental shelf” – Dr. Eileen Hofmann (Old Dominion University) and Dr. Powell will work to develop a special issue of the scientific journal Oceanography, that will include 10-12 peer-reviewed papers presenting an overview on the state of research related to offshore wind development. They will cover, among other topics, the challenges faced by offshore wind development and the effect it has on nearby fisheries, fish populations, and the broader ocean ecology. ($79,200 in funding approved)

About SCeMFiS

The SCeMFiS mission 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 Washington.

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 leading 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.

Read the full release here

VIMS kicks off its annual juvenile striped bass seine survey

July 9, 2018 — On the bank of the James River beside the Lions Bridge in Newport News, field assistant Matthew Oliver waded chest-deep into the warm, lapping water Friday morning, hauling a seine net.

The net wasn’t tall, but it was long — 100 feet — with floats along the top edge and sinkers along the bottom, the better to keep little baby fish from scurrying underneath and swimming away.

Oliver moved heavily in a wide arc through the water, the better to scoop up whatever was swimming in the shallows.

This was just one sweep of select sites along the shores of the James, York and Rappahannock rivers as the monthslong Juvenile Striped Bass Seine Survey kicks off.

The survey is conducted by the Virginia Institute of Marine Science (VIMS) in Gloucester Point and is the second-longest continuous striped bass index in the country. It began in 1967 and, except for a five-year hiatus starting in 1973 for lack of funding, has been conducted every summer since.

The goal is to keep a weather eye on how this iconic sport fish is doing by counting the young-of-year that spawn early in the year and will, in just a few more years, become an official part of the region’s lucrative recreational and commercial fisheries.

“Knowing how many young striped bass are produced this year helps them understand what’s coming in the future,” said VIMS marine biologist Mary Fabrizio. “It helps us better manage the fishery.”

Read the full story at the Daily Press

Healthy fisheries and aquatic grasses fuel Chesapeake Bay recovery

June 19, 2018 — Booming aquatic grasses and bellwether fisheries are driving sustained progress in Chesapeake Bay health, which experts say is finally showing “significant” overall improvement.

The 2017 Chesapeake Bay Report Card issued by Virginia and Maryland rates the estuary a C for the third straight year as recovery holds steady or improves in five of seven indicators, the James River nails a B- for the first time and the fisheries index scores its first-ever A+.

Experts call their assessment “important evidence that the positive trend in ecosystem health is real” and that cleanup efforts across the watershed are working.

“It is the first time that the … scores are significantly trending in the right direction,” said Bill Dennison at the University of Maryland Center for Environmental Science in a statement Friday. “We have seen individual regions improving before, but not the entire Chesapeake Bay.”

The UMCES compiled the report card along with the Virginia Institute of Marine Science in Gloucester Point, the Virginia Department of Environmental Quality and other governmental agencies and academic groups both in this state and Maryland. This is the 12th year of its release.

The fisheries index is comprised of the average score for blue crab, striped bass and bay anchovy indicators. These species are considered ecologically, economically and socially important to the bay.

Last year’s fisheries index was 90 percent. This year, it rose to 95 percent, the highest ever recorded for the annual reports — the average of 100 percent for striped bass and blue crab, and 84 percent for bay anchovy.

Read the full story at the Daily Press