Saving Seafood

Long-term ocean sampling in Narragansett Bay reveals plummeting plankton levels: impact uncertain for local food web

May 16, 2024 — URI researchers estimate that in Narragansett Bay, the level of tiny plantlike creatures called phytoplankton has dropped by half in the last half century, based on new analysis of a long-term time series study of the bay.

That’s what a new paper published by the University of Rhode Island’s Graduate School of Oceanography (GSO) reports — news, recently uncovered, that is both surprising and concerning.

Analyzing the full time series of the bay, the research team found that phytoplankton biomass in Narragansett Bay declined by a stunning 49% from 1968 to 2019. The intensity of the winter-spring bloom, which starts the annual cycle of productivity in the Bay, decreased over time and is also occurring earlier each year.

URI’s new study in PNAS (Proceedings of the National Academy of Sciences) shares information from one of the longest plankton time series in the world. The subject of study is not only a destination for generations of Rhode Islanders and tourists but a fruitful site of research for oceanographers at URI’s Narragansett Bay Campus.

“A lot of people live, work and play on the shores of Narragansett Bay,” Oceanography Professor Tatiana Rynearson says, providing key goods and services for the nearly 2 million people who inhabit its watershed. Even in the dense Northeast, Narragansett Bay stands out as a well-used body of water. The bay sits between regions of cold winters and warm summers, Arctic waters to the north and warm waters to the south, existing at a bit of a scientific sweet spot that offers researchers a dynamic environment to study.

Read the full article at the The University of Rhode Island

Tracking trends and ocean temperatures could give R.I. fisherman an edge

July 27, 2021 — Tony Eliasen and Brian Amaral, the co-founders of Newport, Rhode Island-based Ocean State Sensing, are focused on sensing and mapping temperatures in the water to be able to observe and track events. (Amaral is not related to the Boston Globe reporter.)

In real time, they are able to measure and plot water temperature from the sea bed to the surface, a tracking system that they say reveals connections within the biosphere that are otherwise unknown.

Q: What does Ocean State Sensing do?

Eliasen: We are a temperature sensing services company focused on the maritime environment. We provide high-resolution, continuous, in-situ sensing services. Our goal is to improve the understanding of the dynamic shifts in our climate and oceans to affect positive change and stewardship of the marine industries and the planet.

Q: Are you conducting sensing and mapping temperatures just off Rhode Island’s coastline, or elsewhere?

Amaral: At the moment we are [focused on Rhode Island], but we have plans to conduct data collection events in multiple places. We are actively seeking collaborators, partners and funding to help us grow our services and applications. One event we are excited about is partnering with a local fisherman to tow our gear behind the boat and measure the entire water column temperature at once as the boat drives up and down Narragansett Bay.

Q: What is the difference between satellite and point-based measurements?

Amaral: Satellites provide temperature data of the surface of the ocean which for many places in the world is accurate only for the first few feet of water. It does not provide data beyond the surface. To get this data, a temperature probe is lowered into the water, and the probe records the temperature of the water touching it. This is a point-based measurement, because it is measuring the temperature at a single point in water depth, at the latitude and longitude it was lowered into the water.

We are able to measure the entire water column at once, and when we tow the equipment, we can measure swaths of data, all of which is measured continuously and in real time.

Read the full story at The Boston Globe

Warmer ocean means changing fish populations in Narragansett Bay

January 27, 2020 — It will come as no surprise to local anglers that different fish species are now found in Rhode Island waters. In some cases, these fish are displacing ones traditionally found here, and scientists are trying to understand which species pose the greatest threat to the native marine populations of Narragansett Bay.

Students presented some of the findings Thursday at the University of Rhode Island Graduate School of Oceanography. The talks on the bay’s marine food web were part of the monthly Bay Informed series sponsored by Rhode Island Sea Grant and open to the public.

“It gets more complicated when you start realizing that there’s a lot of different predators for any given species,” said Maggie Heinichen, a master’s degree candidate. They’re not just eaten by one thing. And it gets even more complicated when you look at an entire ecosystem.”

Scientists have looked at changes at both the bottom and the top of the food web, analyzing fluctuations in populations of organisms at the bottom, like plankton, and of fish at the top level such as striped bass.

Read the full story at The Westerly Sun

Inside Rhode Island’s Quahog Industry, A Shrinking Workforce

April 8, 2019 — “What I’m trying to do is I’m trying to get underneath all the shells and try to get to the quahogs,” says Dave Ghigliotti. He’s been a shellfisherman in Rhode Island for over 30 years. I went with him to dig for quahogs just off of Rocky Point State Park in Narragansett Bay.

There’s some debate over the name quahog. Some people use it to talk about the biggest clams. But basically all the hard shelled clams we eat here in Rhode Island are one species: the Northern Quahog. Other names you might have heard — like littlenecks, topnecks, cherrystones or chowder clams — describe the different sizes.

When Ghigliotti got into the business, there were about 2,000 licensed commercial quahoggers in the state. Now, the number is less than half that.

Some left the industry because the money isn’t great. Ghigliotti says clam prices have barely gone up since the ’80s. And, he adds, quahoggers have to compete for space on the bay with the growing number of oyster farms.

“That industry’s growing, so they’re always looking for space. And the problem is, once they lease a piece of real estate we can’t fish it anymore. We’re really pretty migratory. You see these guys here today, but once this place has had kind of its day, we move on to another place,” Ghigliorri says.

Read the full story at WBUR

Rhode Island: Narragansett Bay’s Ecology Changes Worry Fishermen

December 11, 2017 — NARRAGANSETT, R.I. — Narragansett Bay has experienced dramatic changes during the past century, from being a dumping place for sewage and industrial pollutants to a near paradise for recreational swimming and boating. But changes continue to occur, whether from the warming climate, invasive species, fluctuating wastewater effluent, or other factors.

As University of Rhode Island oceanography professor Candace Oviatt recently told an audience of fishermen, scientists and students, “I don’t think I’ve ever seen an average day on Narragansett Bay. The bay is always changing. Every year is different. Whether we like it or not, the bay is going to keep changing.”

Oviatt’s comments on Dec. 6 were part of a daylong symposium sponsored by Rhode Island Sea Grant and aimed at creating a dialogue between fishermen — many of whom are worried that the bay has gotten so clean that there is little food left for fish to eat — and scientists whose research tells a sometimes confusing story of how the bay’s changing ecology might give that erroneous impression.

While most of the scientists claim their research suggests that the biomass of fish and other creatures living in Narragansett Bay has changed little through the years, almost all said the composition of species that call the bay home has changed dramatically.

A weekly fish trawl survey in two locations in the bay conducted since 1959 illustrates those changes. According to Jeremy Collie, the URI oceanography professor who directs the trawl, in the early years of the survey most of the species collected in the nets were fish and invertebrates that live on or near the bottom, such as lobster, winter flounder, tautog, cunner and hake. Those species also happen to prefer cooler water.

In recent years, the species that prefer warmer waters and that live higher in the water column have dominated the trawl surveys, including butterfish, scup and squid.

Read the full story at ecoRI

 

Rhode Island: Fishermen: Bay cleanup might be doing harm

December 7, 2017 — NARRAGANSETT, R.I. — Narragansett Bay is cleaner and clearer than it’s been in decades.

But after huge strides in treating wastewater and controlling storm runoff, some are asking a question that would have been unthinkable just a few years ago about what is arguably Rhode Island’s most valuable natural resource:

Is the Bay too clean?

Fishermen are raising the issue after seeing steep declines in numbers of flounder, lobster and other species that were once so abundant that they formed the bedrock of their industry.

It has gotten bad enough that lobsterman Al Eagles says that he and others now call the Bay “Chernobyl,” a reference to the site of the devastating Soviet-era nuclear disaster.

“We have to ask ourselves, ’What is taking place in the Bay that has changed it from a resilient bay to a dead bay?” Eagles, who has fished for 45 years, said Wednesday at an annual marine affairs forum held at the University of Rhode Island.

Lanny Dellinger, board member of the Rhode Island Lobstermen’s Association, put the blame on a tightening of restrictions on wastewater treatment plants after the historic Greenwich Bay fish kill in 2003 that over the past 10 years or so has cut in half the amount of nutrients that flows into the Bay.

“It seemed to be happening in sequence with the timing of nitrogen reductions,” Dellinger said, pointing out that such nutrients are key to the growth of phytoplankton, a critical food source for marine life. “I used to see unbelievable amounts of life, but I started to see that change in the mid-2000s.”

The men spoke at the 16th annual Ronald C. Baird Sea Grant Science Symposium at URI’s Graduate School of Oceanography in Narragansett, an event aimed at fostering discussion and developing research projects. Bruce Corliss, dean of the school, said he chose to focus on questions about the Bay’s health after a conversation with Eagles.

Read the full story at the Providence Journal

 

Fishing Companies: Environmentalists Are Wrong About Menhaden Fishery

November 13, 2017 — Fishing companies are at odds with Rhode Island environmental advocacy groups over proposed changes for the menhaden fishing industry.

Changes to the Interstate Fishery Management Plan for Atlantic Menhaden are up for a vote at the Atlantic States Marine Fisheries Commission meeting in Maryland this Monday and Tuesday.

The commission’s Atlantic Menhaden Management Board is considering a new amendment that would tie menhaden catch limits to the role they play in the ecosystem. The fish are a primary food source for larger fish, such as striped bass, marine mammals, and birds, such as osprey.

Rhode Island environmental groups support the approval of a temporary ecological-based management plan to make sure there’s enough menhaden in Narragansett Bay for predators to eat. Those temporary rules would be adjusted as more data becomes available.

Read and listen to the full story at Rhode Island Public Radio

Rhode Island fishermen ask President Trump to deregulate commercial fishing industry

May 18, 2017 — Local fishermen are asking President Donald Trump to deregulate the commercial fishing industry, complaining that quotas are hurting their bottom lines.

A group of Rhode Island fishermen left Point Judith early Wednesday morning to sail to New London, Conn., for the U.S. Coast Guard Academy graduation. The flotilla, joined by Rhode Island GOP National Committeewoman Lee Ann Sennick, also included fishermen from New York and Connecticut.

“It’s just a very disheartening feeling,” said Aaron Williams, the captain of the Tradition. He was one of the fishermen from Point Judith. “It’s kind of a frustrating thing to see certain species of fish that have rebounded as much as they have, and every year we keep getting stuff taken away from us.”

With signs reading “Please help us” and “Make commercial fishing great again,” the fishermen hoped to catch President Trump’s eye as he arrived at the commencement.

The group says fishing quotas and limits are unnecessary. They also say wind farms and sanctuaries greatly limit where they can practice their trade.

“We’re just trying to let [President Trump] know there is an ocean full of fish out here and the fish have been rebuilt, and we are forced to throw them over dead all day in the name of conservation,” said Brian Loftes, another commercial fisherman. “In the meantime, we’re slowly going out of business because these boats are expensive to run.”

Conservationists, however, warn that getting rid of quotas could disrupt the delicate ecosystems of the ocean.

“I think it would be devastating to the industry if we saw regulations go away,” said Michael Jarbeau, the Baykeeper at Save the Bay. His organization advocates to protect Narragansett Bay. “If there were no quotas, it’s extremely possible that we would see fish stocks become depleted,” he said.

Read the full story at WPRI

Rhode Island quota for menhaden the focus of debate

December 27, 2016 — About 30 recreational and commercial fishermen, fish processors, environmental groups (like Save the Bay) and fish managers attended Monday’s public hearing on Atlantic menhaden at the URI Bay Campus held by the Atlantic States Marine Fisheries Commission.

The two main issues at the hearing were the use of ecosystem-based management strategies to determine stock status and allowable catch limits, and landing time frames, which would be used to determine allocation of quota.

The Atlantic menhaden plan will be the first ASMFC plan that utilizes ecosystem-based management in this fashion.

Meghan Lapp of Seafreeze, Ltd., North Kingstown (the largest producer and trader of sea-frozen fish on the East Coast) and a member of the ASMFC Atlantic menhaden Advisory Panel, said “Historically, Rhode Island has landed a lot more fish than the allocation reflects.” George Allen, representing the Rhode Island Saltwater Anglers Association (a recreational fishing association with 7,500 members), said, “Currently one state (Virginia) takes 85 percent of the catch because of the Atlantic menhaden reduction fishery. This is inequitable for the rest of the coastal states.”

Most in attendance agreed that the Atlantic menhaden allocation in the Northeast states, and specifically Rhode Island, should be enhanced to more accurately reflect historical catch over a longer period of time including the time period when landings were high due to active processing plants in the northern states. So instead of using average landings between 2009 and 2011, many at the meeting were advocating for a longer time-series average extending to include years prior to 2009 such as 1985 when more accurate bait fishery landings data became available.

However, there was much disagreement in the room when it came to determining ecological reference points in estimating how many fish would be allowed to be taken out of the water. A representative from Save the Bay said, “Atlantic menhaden have great ecological value for Narragansett Bay and we advocate for existing guidelines for forage fish species until menhaden-specific ecological reference points (ERPs) are developed by the ASMFC’s Biological and Ecological Reference Point (BERP) workgroup.”

Read the full story at the Providence Journal 

Fishing Report: A new way to count fish

November 25, 2016 — Scientific surveys of fish are often done by trawling. This means towing a net and then hauling it up to count the catch. Estimates are then made about how many of each species are in a square mile. They are generally done in the same area for the same amount of time on a periodic basis.

The Rhode Island Department of Environmental Management does trawl surveys in Narragansett Bay, the National Oceanographic & Atmospheric Administration and a regional fisheries commission do trawl surveys too. Fish managers and scientists simply do not have the resources to do a proper job with survey trawls in our coastal waters, never mind areas outside our territorial waters (200 miles). Large tracts of the ocean are not monitored so we have no idea what fish are in the water globally, never mind how many are being taken out.

But a reliable and inexpensive way to monitor fish populations is being developed by scientists. Philip Thomsen and his team from the Natural History Museum of Denmark, are developing a a far less costly way to count fish.

The team is examining fragments of floating DNA which fish slough off in slime and scales, or excrete into the water.

A Nov. 19 Economist blog post said scientists “Hope they are able to link the quantity of this ‘environmental’ DNA to those species’ abundances, as measured by a trawl survey that took place at the same time… Given the fragmentary nature of environmental DNA, they found it easier to recognize families than species (a family, in this context, is the taxonomic level above a genus; herring, sardines and shad, for example, all belong to the family Clupeidae). The trawls picked up fish from 28 families. The team found DNA from members of 26 of these in their samples, and also detected three families that had no representatives entangled in trawl nets.”

Read the full story at the Providence Journal