Saving Seafood

SEAN HORGAN: On Henri, a Bell, and sharks

August 23, 2021 — Sharks were back in the news last week, which should make our pal Bob Masjoan at the Crow’s Nest happy. He is all sharks, all of the time.

One time, during Shark Week, a misguided Irish soul, we’ll call him Cormac, asked Bob to turn the bar’s largest television to a European Cup soccer match instead of the shark fest. His request was rebuffed with extreme pelagic prejudice.

Anyway, no shortage of sharks last week. One viral video showed a herd of sharks — whites, blues et al — feasting on the carcass of a dead humpback whale out on Stellwagen Bank while an intrepid shark researcher on a tagging project lingered in his sea kayak mere feet away.

Us? We would have requisitioned a Los Angeles-class submarine.

Then came a fisherman’s photo — we spied it on the website of radio station WOKQ 97.5 — of a huge hammerhead shark swimming somewhere off the coast of Maine, looking for all the world like the most evil creature on the planet.

The accompanying story said hammerhead attacks on humans are rare — only 16 documented throughout the world, none fatal.

The piece also said the hammerheads are more afraid of us than we are of them. We here at FishOn are here to tell you that is not even remotely true.

Read the full opinion piece at the Gloucester Daily Times

Whale rescuers free humpback from fishing gear entanglement

June 11, 20221 — A three-day effort to free a humpback whale from entanglement in fishing gear ended in success this week, marine mammal experts said Thursday.

The whale, identified as a mature female named Valley, was first spotted Monday by a whale watch boat on Stellwagen Bank northeast of Provincetown, according to a statement from the Center for Coastal Studies.

The center’s entanglement response team found that the whale had a heavy line lodged in its mouth, but because sea conditions were poor, it could not be freed.

Read the full story from the Associated Press at the Gloucester Daily Times

NE Council Receives 2017 Scallop Survey Overview and Progress Report on 2018 Management Measures in Framework 29

October 2, 2017 — The following was released by the New England Fishery Management Council:

During its late-September meeting in Gloucester, MA, the New England Fishery Management Council received a comprehensive overview of the “very successful” 2017 scallop survey season. The Council then reviewed the range of measures under development for Framework Adjustment 29 to the Atlantic Sea Scallop Fishery Management Plan. These measures, once fully developed and approved, will apply to the 2018 scallop fishing year, which will begin on April 1 instead of March 1 as in previous years.

Five separate groups contributed to the 2017 scallop surveys:

  • The Virginia Institute of Marine Science (VIMS) conducted dredge surveys in the Mid-Atlantic, Nantucket Lightship Area, and Closed Area II.
  • UMass Dartmouth School for Marine Science and Technology (SMAST) conducted intensive surveys of Closed Area I, Closed Area II, and the Elephant Trunk Area, along with broadscale surveys of Georges Bank and the Mid-Atlantic and a drop camera survey of Stellwagen Bank in the Gulf of Maine.
  • The Woods Hole Oceanographic Institution (WHOI), in partnership with Lund’s Fisheries, conducted a Habitat Camera Mapping System (HabCam) version 5 (v5) survey of the Northern Edge on Georges Bank.
  • Coonamessett Farm Foundation (CFF) conducted a HabCam v3 survey of the Nantucket Lightship Area, as well as a HabCam v3 survey on Stellwagen Bank and Jeffreys Ledge in the Gulf of Maine, along with six dredge tows on Stellwagen. And,
  • The Northeast Fisheries Science Center (NEFSC) conducted a dredge survey on Georges Bank and a HabCam v4 survey of the Mid-Atlantic and Georges Bank.

Read the full release at the New England Fishery Management Council

UMass Dartmouth cod survey takes a technical leap with high-def video

January 27, 2017 — NEW BEDFORD, Mass. – Scientists at the UMass School for Marine Science and Technology are reporting a major advance in a new technology to use video to survey the fish stocks in the fishing grounds of the North Atlantic.

Dr. Kevin Stokesbury’s team surveyed the entire Stellwagen Bank, a fishing ground in the Gulf of Maine about 15 miles south of Gloucester and 6 miles north of Provincetown. They found large numbers of cod, whose stock assessments have been sharply reduced in recent years because of surveys done by NOAA fisheries. The reduction has caused a chain reaction in the fishing industry as abundant species cannot be caught if too much cod is hauled in as bycatch.

Four years in the making, Stokesbury’s video apparatus has now been equipped with high-resolution video that enables the identification of every fish that passes through the open-ended trawl net used to count fish without harming them.

“The seven-day cruise was very successful,” Stokesbury said in a news release. “Atlantic cod were observed over much of the bank, and the largest tow collection was of 345 cod in a half hour, with individuals measuring up to 83 centimeters. The idea is to increase the amount of sea floor sampled per sea day without killing more fish.”

Chief scientist and graduate student Travis Lowery told The Standard-Times that the big improvement over past versions of the video apparatus is the addition of a GoPro camera that enables the identification of every fish in high definition. Prior versions relied entirely on a tethered black and white video camera.

Read the full story at the New Bedford Standard-Times

New camera can help assess cod stocks in Gulf of Maine

January 26, 2017 — Researchers from UMass Dartmouth say they have successfully tested an underwater video-survey system that they hope will provide an accurate method to assess Atlantic cod stocks.

In collaboration with fishermen, the research team recently placed high-resolution cameras in an open-ended commercial trawl net on Stellwagen Bank in the Gulf of Maine, known as one of the world’s most active marine sanctuaries.

The cameras captured images of cod and other groundfish as they passed through the net. Periodically, researchers from UMD’s School for Marine Science & Technology closed the net for short periods to collect length, weight, and take other biological samples from some of the fish. The fish are unharmed and are returned to the sea.

Read the full story at the Boston Globe

UMass Dartmouth Scientists Deploy New Video System to Survey Atlantic Cod Population on the Stellwagen Bank Fishing Grounds

January 26, 2017 — The following was released by the University of Massachusetts Dartmouth:

Last week scientists from UMass Dartmouth’s School for Marine Science & Technology (SMAST) and fishermen successfully deployed a new video survey system they believe can provide more accurate measurements of the Atlantic cod population, helping regulators manage the fishery.

The system, collaboratively developed by scientists and fishermen over the last four years, was tested on Stellwagen Bank, a fishing ground located in the Gulf of Maine about 15 miles southeast of Gloucester and six miles north of Provincetown. The system involves placing high resolution video cameras in an open-ended commercial trawl net to capture images of groundfish (focusing on Atlantic cod and yellowtail flounder) as they pass through unharmed. Periodically the net is closed to collect biological samples such as length and weight measurements. These cod are kept alive in wells and are returned to the sea alive and in good condition.

SMAST Professor Kevin Stokesbury and his research team – chief scientist and graduate student Travis Lowery and graduate student Nick Calabrese – designed the system so they could identify the species in every image. This allows researchers to approximate the abundance, density, size distribution, and the impacts of commercial fishing. “Our goal is to provide all stakeholders in this issue with trustworthy science that reduces uncertainty for the Gulf of Maine cod fishery,” Dr. Stokesbury said.

“The seven-day cruise was very successful,” Dr. Stokesbury said. “Atlantic cod were observed over much of the bank, and the largest closed tow collection was of 345 cod in a half hour, with individuals measuring up to 83 cm. The idea is to increase the amount of sea floor sampled per sea day without killing more fish.”

A key milestone of the cruise was reached last Friday morning when all project systems came together. Data were collected on the position and speed of the vessel, including how the net was performing (i.e. spread of the doors, spread of the wings, bottom temperature). “We captured video of the footrope as the net passed over the sea floor and of the fish entering the net, as well as extremely clear video of the fish as they pass through the net, and a very large school of cod,” said Stokesbury. “All systems worked for the remainder of the trip; collecting data on cod abundance, distribution, the sea floor over which they school, and the other fish they associate with, including large schools of sand lance a key prey.”

The most recent assessment for Gulf of Maine cod estimated that the spawning stock biomass is a small proportion of its historic size. In response to the low abundance, the total allowable catch has been drastically reduced, constraining the fishermen’s ability to harvest healthy stocks, such as haddock and pollock. “Increasing the amount of sea floor scientifically sampled and increasing the amount of the information collected during a day at sea should reduce the uncertainty in the stock estimate, and reduced uncertainty is ultimately in everyone’s best interest,” Dr. Stokesbury said.  “In the end I think it is a good proof of concept and should give a good estimate of the cod aggregated on Stellwagen Bank.”

The Baker-Polito Administration provided $96,720 in capital money through the state Division of Marine Fisheries to fund the research tows conducted on Stellwagen Bank. Dr. Stokesbury’s research has also received support in state funding the past two years, receiving more than $800,000 through legislation supported by State Senator Mark Montigny, State Representative Antonio F.D. Cabral and the entire SouthCoast legislative delegation.

Read the full release at UMass Dartmouth

Stellwagen Bank National Marine Sanctuary seeking advisory council applicants

August 11, 2016 — NOAA’s Stellwagen Bank National Marine Sanctuary is seeking applicants for one business/industry alternate seat on its advisory council.

The council ensures public participation in sanctuary management and provides advice to the sanctuary superintendent.

“Each of the members brings a unique perspective to the council based on their long experience in the New England area,” said Craig MacDonald, sanctuary superintendent. “Since its establishment, the council has played a vital role in advising the sanctuary and NOAA on critical issues. We are very pleased that council members offer their considerable talents to help us manage the resources of Stellwagen Bank National Marine Sanctuary.”

Read the full story at Wicked Local

A new formula for whale preservation

February 17, 2016 — WOODS HOLE — From 750 feet above Northeast ocean waters, right whale researchers can easily pick out “Ruffian” for his many scars or “Baldy” for her lack of rough skin patches. Other right whales, though, may take hours to identify.

A new “face recognition” algorithm for right whales, however, announced recently by the National Oceanic and Atmospheric Administration, could lead to development of time- and money-saving software and eventually to greater preservation of a species whose global population is 520, right whale experts say.

The new algorithm, created in an international competition sponsored by NOAA Fisheries and the Natick software developer MathWorks, can identify right whale “faces,” or tissue patterns on the top of their heads, with 87 percent accuracy, according to Christin Khan, a NOAA Fisheries biologist and right whale aerial surveyor. Khan, who works in Woods Hole, pursued the idea of facial recognition software for the right whales, and researched how to get the algorithm built, through an online competition that began in August and ended in January.

The winning team, out of 364 entries, was from the software company deepsense.io, with offices in the United States and Poland.

The new algorithm is a first step to developing software for day-to-day use, Khan said. The algorithm, in its initial form, is for aerial photos only, not for photos taken from a boat, Khan said. But the potential is great and part of the growing use of technology to protect whales, several right whale experts said.

“Right now we’re living in the golden age of whale research in terms of technology,” Dave Wiley, research coordinator for Stellwagen Bank National Marine Sanctuary, said. “The things we’re doing now I couldn’t even have imagined 20 years ago. This Cape Cod area is probably at the forefront of all this stuff.”

Read the full story at the Cape Cod Times

A Handy New Use for Drones: Collecting Whale Snot

August 10, 2015 — A spouting whale is a majestic sight, spraying everything around it with minuscule droplets of whale snot. (Okay, so it’s not technically snot—it’s more like lung mucus.) But aside from being pretty, that spray, which scientists call “blow,” is a coveted substance in marine biology. Rich with DNA, hormones, viruses, and bacteria from the whale’s respiratory tract, the goo can give researchers clues about a whale’s stress levels and overall health. So, naturally, scientists decided they needed to try collecting the stuff with drones.

Last month in Stellwagen Bank, Massachusetts, scientists from Woods Hole Oceanographic Institution and NOAA used a hexacopter to collect blow samples and snap photos of 36 humpback whales, gathering data to compare the pod to their brethren in more pristine Antarctic waters. And that’s just one of the conservation research groups that’s decided to capitalize on drones. Ocean Alliance, a nonprofit in Gloucester, Mass., recently launched a Kickstarter for their “Snotbot,” which proposes to collect data from whales off the coasts of Patagonia, Mexico, and Alaska.

These multi-coptered machines are driving a small renaissance in biology and conservation research, allowing researchers—marine scientists especially—to study subjects and places they can’t typically reach. Drones are getting better at carrying scientifically useful payloads: things like more complex sputum samplers, and heavier, better-quality cameras. And as those high-quality drones get cheaper and easier to outfit, they’re helping to answer ecological questions that scientists couldn’t even begin to ask before.

Read the full story at Wired