Saving Seafood

New research shows climate change impacts on whale habitat use in the warming Gulf of Maine

June 10, 2022 — New research finds climate change is having an impact on how large whale species, including the critically endangered North Atlantic right whale, use habitats in the warming Gulf of Maine, showing that right whales’ use of Cape Cod Bay has shifted significantly over the last 20 years.

The study, led by the New England Aquarium and including researchers from the University of Massachusetts Amherst, the USGS Northeast Climate Adaptation Science Center, the Center for Coastal Studies, UCLA, the National Marine Fisheries Service, and the Canadian Whale Institute was published this month in the journal Global Change Biology. The authors set out to better understand the impacts of ocean climate change on phenology, or the timing of recurring biological events such as when plants flower each year. Using more than 20 years of data, the scientists measured shifts in whale habitat use in Cape Cod Bay, evaluating trends in peak use for North Atlantic right whales, humpback whales, and fin whales. The study found that peak use of Cape Cod Bay had shifted almost three weeks later for right whales and humpback whales. Changes in the timing of whale habitat use were related to when spring starts, which has been changing as a result of climate change. The study suggested that highly migratory marine mammals can and do adapt the timing of their habitat use in response to climate-driven changes in their environment, with results showing increased habitat use by right whales in Cape Cod Bay from February to May, with greatest increases in April and May.

“The time of year when we are most likely to see right and humpback whales in Cape Cod Bay has changed considerably, and right whales are using the habitat much more heavily than they did 20 years ago,” said lead author Dr. Dan Pendleton, Research Scientist in the New England Aquarium’s Anderson Cabot Center for Ocean Life.

Read the full story at ScienceDaily

Study finds human-caused North Atlantic right whale deaths are being undercounted

February 25, 2021 — A study co-authored by scientists at the New England Aquarium has found that known deaths of critically endangered North Atlantic right whales represent a fraction of the true death toll. This comes as the death of a calf and recent sightings of entangled right whales off the southeastern United States raise alarm.

The study, published this month in Conservation Science and Practice, analyzed cryptic mortality of right . Cryptic mortality refers to deaths resulting from human activities that do not result in an observed carcass. The study’s authors combined data on whale encounters, , serious injuries, and necropsies from the North Atlantic Right Whale Consortium Identification Database curated by the New England Aquarium with the serious injury and mortality database held by the National Marine Fisheries Service. The scientists concluded that known deaths of the critically  accounted for only 36% of all estimated death from 1990 to 2017.

“Our work has shown that 83% of identified right whales have been entangled one or more times in , and an increasing number of these events result in severe injuries or complex entanglements that the whales initially survive. But we know their health becomes compromised and they eventually succumb and sink upon death,” said Amy Knowlton, senior scientist with the Aquarium’s Anderson Cabot Center for Ocean Life.

Read the full story at PHYS.org

Right whales enter a new year filled with uncertainty

December 22, 2020 — For North Atlantic right whales, the most endangered great whale — and marine mammal —  on Earth, the good news for the new year started early, with the birth of three calves in the fall.

But a fourth calf washed up dead on a North Carolina beach in late November, believed to have died of natural causes soon after birth.

For a species that now numbers 366 individuals with less than 100 females, the births were hailed as a sign that something at least was going right.

“One of the positives is that two of the three mothers are new mothers,” said Philip Hamilton, a research scientist at the New England Aquarium’s Anderson Cabot Center for Ocean Life. Hamilton oversees the Anderson center’s North Atlantic right whale photo-identification catalog.

After years where the numbers of calves fell below the number of dead whales lost to entanglement in fishing gear and collisions with ships, Hamilton found solace in these new mothers.

Read the full story at the Cape Cod Times

Cape scientists forge ahead with right whale research

April 7, 2020 — Over the past week, New England Aquarium scientist Philip Hamilton, manager of the right whale identification catalog at the aquarium’s Anderson Cabot Center for Ocean Life, has received photos of about 30 right whales taken by people walking the shoreline around Race Point and off Nahant.

Unfortunately, researchers hoping to see them from the air and sea during what they consider the epicenter of right whale migration into Cape Cod Bay essentially have been grounded by weather and coronavirus.

“We lost 22 days there,” said Charles “Stormy” Mayo, a senior scientist and director of the Right Whale Ecology Program at the Center for Coastal Studies in Provincetown.

COVID-19 fears forced the New England Aquarium to close March 13. Admission fees account for 80% of their $3.5 million in annual operating expenses, and the aquarium announced layoffs and furloughs last week to cut costs.

The Center for Coastal Studies did not lay off anyone, spokesperson Cathrine Macort said, but its offices and lab are closed. The center is watching expenses and applying for federal payroll aid.

Read the full story at the Cape Cod Times

Endangered right whales spotted in Cape Cod Bay during spring feeding season

April 6, 2020 — An increasing number of endangered North Atlantic right whales have been spotted feeding off of Massachusetts’ coast in recent weeks, a sign that spring is finally here, researchers at the New England Aquarium said.

The right whales live in shallow waters off the southeastern United States during late fall and winter, the aquarium said. After pregnant whales give birth to their calves while living with juvenile and male whales in the region during those months, the whales migrate to Cape Cod Bay during the spring to feed before heading further north.

“In a time when so much is changing around us, I find the appearance of right whales feeding in these waters as they have for hundreds, if not thousands, of years reassuring. Some ancient behaviors remain,” said Philip Hamilton, a research scientist with the Anderson Cabot Center for Ocean Life at the aquarium.

Read the full story at The Boston Globe

Gulf of Maine Longline Survey in Rocky Habitats Now in Sixth Year

February 21, 2020 — For fisheries managers around the world, trawl gear is an efficient way to sample species inhabiting the sea floor or the benthic column above. Depending on the size of the net, grid surveys will capture enough of the animals in the area at the time to compile data used in abundance models that go into stock assessments.  Unless the fish swim out of the net before it is hauled. Or unless the sea bottom is rocky or pinnacled.

In those areas, longline gear can help fill in the blind spots for regional surveys. Longline gear can be lain across rock piles, and retrieved without destroying the gear itself. It differs from a trawl net in several ways: the longline has baited hooks distributed evenly across its length, it is stationary, anchored to the sea floor with location buoys at the sea surface at each end, and it can be deployed by smaller vessels.

Read the full story at Seafood News

Scientists Sound Alarm After 6 Rare Whale Deaths in a Month

July 5, 2019 — A half-dozen North Atlantic right whales have died in the past month, leading scientists, government officials and conservationists to call for a swift response to protect the endangered species.

There are only a little more than 400 of the right whales left. All six of the dead whales have been found in the Gulf of St. Lawrence off Canada, and at least three appear to have died after they were hit by ships.

The deaths have led scientists to sound the alarm about a potentially catastrophic loss to the population. The deaths are especially troubling because they include females, said Philip Hamilton, research scientist with the Anderson Cabot Center for Ocean Life at the New England Aquarium.

“If we’re going to have deaths, they just can’t be female,” Hamilton said, adding the population is down to only about 100 reproductive females. “We need a different system.”

Right whales have suffered high mortality and poor reproduction in recent years, particularly in 2017. The whales appear to be traveling in different areas of the ocean than usual because of food availability, said Nick Record, senior research scientist at Bigelow Laboratory for Ocean Sciences in Maine.

Read the full story from the Associated Press at The New York Times

Making Catch-And-Release Safer For Sharks

June 10, 2019 — Say the word “shark” to a New Englander these days and the mind jumps straight to great white sharks, which have seen a remarkable increase here in recent years.

But great whites aren’t the only sharks around. And it turns out we know little about many of the sharks that frequent New England’s waters.

Now there’s a new effort to understand how catch-and-release fishing of sandbar sharks impacts their survival.

“We want to know if the catch and release processes is harming the fish in any way, and if it is, we want to work with fishermen to try to figure out what is it about the capture event that is causing the sharks to die,” Jeff Kneebone told Living Lab Radio.

Kneebone is a fisheries scientist with the Anderson Cabot Center for Ocean Life at the New England Aquarium and much of his research focuses on figuring out where sharks are and what they’re doing as they move around the region.

Twenty years ago, Sandbar sharks had a large population off the mid-Atlantic coast. When the population dropped, it became illegal to catch and keep them. But fishermen still are allowed to pursue them using catch-and-release fishing.

Given the sharks’ susceptibility to population declines, Kneebone wants to know more about what happens after they are caught and released. When they die, why?

“Is it how long they’re being fought? Is it how they’re being handled when they’re landed on the beach? Is it where they’re being hooked?” he said.

Read the full story at WCAI

Lawmakers take up threats to North Atlantic right whales

March 11, 2019 — The sound of an air horn echoed through a Congressional subcommittee hearing Thursday, set off by U.S. Rep. Joe Cunningham, D-S.C., to mimic what critically endangered North Atlantic right whales might experience during seismic testing for oil and gas.

The loud demonstration occurred at a hearing focused on permits that could soon be issued by the U.S. Department of Interior to five companies to explore oil and gas reserves off the mid- and southern Atlantic states. Critics of the move argue that the North Atlantic right whales, many of which visit Cape Cod Bay to feed, could be harmed in the process.

“We must reduce exposure of all whales but particularly females to stressors that can slow or stop reproduction,” said Scott Kraus, an expert witness with the New England Aquarium’s Anderson Cabot Center for Ocean Life, who appeared during a hearing before the Subcommittee on Water, Oceans and Wildlife.

Read the full story at the Cape Cod Times

MASSACHUSETTS: Meet the New England Aquarium’s robotic research assistant

March 4, 2019 — It weighs around 100 pounds, is about the size of a mini-fridge, and comes with single robotic arm and an 800-foot cord.

The New England Aquarium’s new, remote-controlled underwater vehicle — an unexpected gift from software giant Autodesk Inc. in 2017 — has a range of abilities, from locating lost fishing gear in the Boston Harbor to recording video of sea life that would be off-limits to human divers. Importantly, the device helps fulfill the 50-year-old institution’s often-overlooked core research mission.

“There’s this supposition that aquariums don’t do scientific research,” said John Mandelman, vice president and chief scientist of the Aquarium’s Anderson Cabot Center for Ocean Life. “I think the (vehicle) is a surprise to people because it’s an example of using high-technology to do scientific research at an aquarium that people don’t realize has a scientific research angle.”

It was a couple years ago now that Autodesk’s Boston office called out of the blue to say it wanted to donate a remote-controlled vehicle, or ROV, made by San Diego-based Teledyne SeaBotix, said Mandelman. The company had bought it three years earlier for a one-time project, but it had sat on a shelf unused ever since.

Read the full story at the Boston Business Journal