Dvora Hart Archives - Saving Seafood

Computers Now “See” Animals on the Ocean Bottom

September 8, 2020 — The following was released by NOAA Fisheries:

The Northeast Fisheries Science Center’s annual sea scallop research survey uses a towed sampling device called the HabCam. It collects approximately 5 million images of the ocean bottom off the Northeast United States. Scientists and volunteers then manually examine an astonishing 100,000 of these images, roughly 2 percent of the number gathered. They focus on identifying just four targets: sea scallops, fish, crabs, and whelks.

So, a wealth of data is going uncollected owing to the sheer volume available and just how labor-intensive pulling it out of images can be.

Researchers have turned toward finding ways for machines to help identify sea life in these images, faster and more efficiently than humans can. This would improve population data for sea scallops. By more thoroughly examining each image, all kinds of information about other sea life and their habitats can also be captured.

Enter Dvora Hart, an operations research analyst at the Northeast Fisheries Science Center. Hart has been at the forefront of estimating sea scallop populations numbers from images taken by devices like the HabCam. The upcoming 2020 sea scallop assessment will once again use improved population data collected from images.

“HabCam gives us photos of animals in their natural environment without disturbing them; however, much of the information in the images is not collected because human annotators can only mark a small percentage of the available images,” said Hart. “Automated annotators can mark all the images and, given proper training, can identify a multitude of different targets—not just sea scallops, fish, crabs and whelks.”

Hart is part of an interdisciplinary team that developed the world’s first advanced automated image analysis software for the marine environment. The Video and Image Analytics for the Marine Environment, VIAME for short, uses convolutional neural networks—a recent advance in artificial intelligence. These networks teach computers to recognize species and features of their habitats in the images taken by the HabCam.

The work is so significant that Hart and her team won a 2019 Department of Commerce gold medal for their work. This recognition is the highest honor award offered to department employees.

Read the full release here

New England 2017 scallop plan likely to mean landings of 47.5m pounds

November 22, 2016 — The New England Fishery Management Council (NEFMC) has approved an Atlantic sea scallop fishery management plan for 2017, which maintains landings at a comparable level to 2016, it said.

The framework establishes specifications for the 2017 fishing year, and sets default specifications for 2018.

All told, estimated landings for 2017 are put at 47.5 million pounds, NEFMC said. So far this fishing year — March to October — the fishery has caught around 33m pounds, Dvora Hart, with the National Oceanic and Atmospheric Administration, told Undercurrent News.

She estimated that by the end of the fishing year, on Feb. 28, fishers will have caught a total of around 40m pounds for 2016. Hence, the NEFMC’s projection suggests an increase of 18.7%.

The NEFMC, meanwhile, told Undercurrent that “many factors go into these calculations, but once all of the adjustments and deductions are made, the council’s projections indicate that landings in the end will be very similar — not exactly the same, but in the same general ballpark”.

Read the full story at Undercurrent News

High US scallop yield expectations may impact market now

September 28, 2016 — Contrary to expectations in some quarters, there may not be a boom in US scallop landings next year, and planning for one now could adversely affect the market, Joe Furtado — executive vice president of Eastern Fisheries — told Undercurrent News.

“If your only source of information was the headlines of most of the articles over the last year, you would think that the fishery is going to be double what it has been. But the reality is that the exploitable biomass just isn’t growing as quickly as anticipated,” he said.

Scientists with the National Oceanic and Atmospheric Administration (NOAA) in 2015 claimed to have identified very strong scallop recruitment throughout the Mid-Atlantic, and especially so in an area called the ‘Elephant’s Trunk‘.

“Recruitment refers to two-year-old scallops, roughly two inches in shell height,” Dvora Hart with NOAA told Undercurrent at that time.

Read the full story at Undercurrent News