Saving Seafood

Scientists study how marine mammals survive at great depths

April 30, 2018 — Whales, dolphins and seals have evolved to hunt prey deep in the ocean, an environment that would otherwise prove deadly to animals that depend on breathing air to live. Until recently, scientists believed marine mammals’ known physical adaptations protected them from the effects of such punishing depths.

But scientists were baffled by computer models that showed that, even with the known adaptations, 50 percent of animals studied still should have experienced the bends. Researchers concluded there must be some else going on.

A new study by the Woods Hole Oceanographic Institution and the Oceanographic Foundation of the City of Arts and Sciences in Valencia, Spain, may provide an answer. The study, funded by the U.S. Navy, found that deep-diving marine mammals use a physical adaptation — the collapse of one portion of the lungs — to block the flow of nitrogen into the blood and prevents the animals from getting the bends, the crippling release of nitrogen gas that can occurs when surfacing from dives deeper than 130 feet.

“If you get the conditions right, you can get a nice exchange of oxygen and carbon dioxide but block the nitrogen,” said Michael Moore, a WHOI senior scientist who specializes in the analysis of marine mammal mortalities. Moore is a co-author of the study, which was published April 25 in the journal “Proceedings of the Royal Society B.”

The mammals have other physical adaptations that help them survive the depths when they exhaust available oxygen in their lungs, including a high amount of proteins in blood and muscle that bind oxygen and a higher ratio of red to white blood cells. Their ribs and lungs can collapse under pressure without breaking and their airways are hardened bunkers that remain partially open to power the signals they use to locate one another and their prey.

Read the full story at the Cape Cod Times

 

Sharks, Dolphins, and Turtles are Turning Up in Strange Places Because of Climate Change

April 20, 2018 — Luke Halpin couldn’t believe his eyes. In the early morning hours from his spot on a research ship in the Pacific Ocean, he was seeing bottlenose dolphins. If Halpin had been on a ship off the coast of California, this wouldn’t be remarkable. But he was on a Canadian research vessel floating about 100 miles northwest of Vancouver. These dolphins had never been seen alive north of the waters off the coast of Washington state.

“My initial reaction was one of disbelief,” he told Newsweek. “But they’re an unmistakable species. They’re easy to identify.”

Halpin’s next reaction was to start counting and pull out his camera. In total, he spotted about 200 dolphins and 70 false killer whales—a very large group—that came within a few hundred feet of the ship. He and his colleagues published their observations in Marine Biodiversity Records on Thursday.

Read the full story at Newsweek

 

Salmon survival: ‘We need more lethal removal of sea lions. Hazing is not the answer’

April 6, 2018 — Ted Walsey’s shotgun cracked like thunder, lobbing a cracker shell into the Columbia River and sending the big brown sea lion beneath the surface in search of friendlier waters. But the boat and the noises emanating from it weren’t far behind.

Just as crews from the Columbia River Inter-Tribal Fish Commission have for a number of years, Walsey, Bobby Begay and Reggie Sargeant patrolled the river just below Bonneville Dam on Wednesday afternoon, harassing but not killing sea lions with cracker shotgun shells and so-called seal bombs — both essentially big firecrackers, the former shot from a shotgun, the latter dropped by hand — downstream and away from the fish ladders, where endangered migratory salmon congregate.

For the salmon, it’s the first chokepoint on a long journey to their spawning grounds. For hungry sea lions, it’s like a quick trip to an all-you-can-eat buffet.

The National Oceanic and Atmospheric Administration Fisheries division estimates about 45 percent of spring chinook salmon are lost between the mouth of the Columbia and Bonneville Dam, with sea lions being primarily responsible.

Sea lions — as well as whales, dolphins and porpoises — are protected under the Marine Mammal Protection Act. For the last 15 years or so, states and tribes have been able to kill some sea lions, but they have to go through a long and laborious permitting process to do so on an animal-by-animal basis.

Read the full story at TDN

 

NOAA publishes global list of fisheries and their risks to marine mammals

April 3, 2018 — The U.S. National Oceanic and Atmospheric Administration (NOAA) has published the first list of foreign fisheries, detailing the risks that commercial fishing around the world pose to marine mammals.

“The [List of Foreign Fisheries] is an important milestone because it provides the global community a view into the marine mammal bycatch levels of commercially relevant fisheries,” according to a statement published on the NOAA Fisheries website.

“In addition, it offers us a better understanding of the impacts of marine mammal bycatch, an improvement of tools and scientific approaches to mitigating those impacts, and establishes a new level of international cooperation in achieving these objectives,” the statement says.

The register is a step toward meeting specific requirements in the Marine Mammal Protection Act on the sources of fish imported into the U.S. It includes nearly 4,000 fisheries across some 135 countries. These fisheries have until 2022 to demonstrate that the methods they use to catch fish, as well as other marine animals such as coral, crabs, lobsters and shellfish, either aren’t much of a danger to marine mammals, or they employ comparable methods and mitigation measures to similar operations in the United States.

Fishing nets can exact a high toll on animals that fishers don’t intend to catch. Nets themselves can trap dolphins, porpoises, seals and sea lions as bycatch. In Mexico, a fishery targeting the totoaba for its swim bladders that fetch high prices in Asian markets has decimated the tiny porpoise known as the vaquita (Phocoena sinus). Perhaps as few as 12 remain in the wild.

The lines from traps, pots and nets can also ensnare even the largest animals in the ocean. Recent research has shown that almost every one of the estimated remaining 451 North Atlantic right whales (Eubalaena glacialis) either is toting errant fishing equipment around or it bears the scars of entanglements with gear. These ropes can cause injuries to right whales and other animals that can lead to infection or death. And towing pieces of gear that can be longer than the whale’s body causes what scientists call “parasitic” drag that can interfere with the ability to find food.

Read the full story at Mongabay

 

Zero Dollars for Marine Mammals?

February 27, 2018 — The future of marine mammals is at risk in U.S. waters. President Trump’s proposed budget for fiscal year 2019 would eliminate the Marine Mammal Commission. With an annual operating budget of $3.4 million, which comes to just over one penny per American per year, the Marine Mammal Commission has for 45 years been assiduously developing science and policy to protect seals, sea lions, dolphins, whales, dugongs and walruses. Through the 1972 Marine Mammal Protection Act (MMPA), Congress charged the commission with providing independent oversight of marine mammal conservation policies and programs being carried out by federal regulatory agencies. Obviously, with a proposed budget of zero dollars, it would be impossible to execute the federally mandated objectives of fostering sustainable fisheries (through the Magnuson-Stevens Fishery Conservation and Management Act [MSA]) and protecting endangered species (through the Endangered Species Act [ESA]).

Marine mammals are more than just lovable creatures. They are important components of productive marine and coastal ecosystems that overall generate $97 billion of the gross domestic product. Whales function as ecosystem engineers by cycling vital nutrients between deeper and surface waters in the oceans. Without this nutrient cycling, oceans would produce less plankton and phytoplankton, which would eventually mean less fish. Also, through complex food-web interactions, marine mammals help to regulate fish populations. For example, marine-mammal–eating killer whales (often called “transient” killer whales) will eat seals, a common predator of pelagic fish—enabling fish populations to stay high. This kind of interaction is called a trophic cascade and is very common in marine ecosystems.

Serving as an independent oversight body, the commission has the critical task of assessing the scientific validity and effectiveness of research conducted to meet the federal mandates of the MMPA, ESA and MSA. If we as a country can’t even protect the charismatic species, I worry for all the less adorable parts of nature. So we need to draw a line in the sand. In this era of “fake news,” maintaining this entity to guard against encroachments to science-based policymaking on is more valuable than ever.

Read the full story at the Scientific American

 

NOAA Announces New Marine Mammal Stranding Response Organization in Nantucket

February 9, 2018 — The following was released by NOAA Fisheries:   

Today, NOAA Fisheries announces that Marine Mammal Rescue Nantucket is now an authorized marine mammal stranding response organization for Nantucket, Tuckernuck, and Muskeget Islands.

After four years of no stranding coverage on Nantucket and the outer islands, Marine Mammal Rescue Nantucket (known as MMRACK, after ACK – the call letters for Nantucket Airport) fills an important gap in the GARFO network. Led by Marine Mammal Alliance Nantucket CEO Scott Leonard, who spent more than a decade working as a stranding volunteer with New England Aquarium, MMRACK will respond to both live and dead whales, dolphins, and seals. In addition to assessing and providing transportation for animals in need of treatment, Leonard’s team, which consists of seasoned volunteers who have worked or trained with the New England Aquarium, will also perform necropsies (animal autopsies) on dead animals.

“Nantucket is a unique place with a rich marine mammal history,” says Leonard. “MMRACK’s mission is to provide public education and outreach with the focus on raising awareness of human and marine mammal interaction, while providing humane care to our marine species. We are looking forward to being part of the network, and plan on working closely with International Fund for Animal Welfare, Marine Mammals of Maine, U.S. Coast Guard, Massachusetts Environmental Police, and other regional partner organizations.”

NOAA Fisheries looks forward to working with MMRACK to increase stranding response capabilities on Nantucket, and to help with monitoring marine mammal populations and health.

“Nantucket is an important area for marine mammal populations, particularly gray seals that breed and pup there,” says Mendy Garron, NOAA Fisheries Greater Atlantic Region Marine Mammal Stranding Response Coordinator. “Having a stranding response organization on the island will help us track the health and welfare of these populations and help reduce conflicts through education and outreach.”

Please report stranded marine mammals on Nantucket, Tuckernuck, and Muskeget to the Marine Mammal Rescue Nantucket Hotline: 833-667-6626.

Learn more about about NOAA Fisheries Greater Atlantic Region by visiting their site here.

 

Why whales are returning to New York City’s once polluted waters ‘by the ton’

August 29, 2017 — Growing up on his father’s boat off the Rockaways in Queens, New York, Tom Paladino was always on the lookout for whales.

“My father started a fishing business in 1945 when he came back from the service, so I never really had a job. I was just on the boat my whole life,” Paladino said as he steered his own boat, the American Princess, back to shore.

The giant animals rarely ventured into the city’s busy, dirty waterways, Paladino told ABC News, and “in the 60s, 70s, and 80s, we used to see one whale a year.”

But on a recent August Saturday, Paladino and Paul Sieswerda, the founder of the nonprofit Gotham Whale, spotted five humpbacks and more than 100 dolphins during a four-hour tour, just three miles off the Rockaways.

“People don’t really connect New York City with whales at all,” Sieswerda told ABC News. “I’ve been involved with wildlife all my life, and I am just so amazed it’s coming back by the ton — literally by the ton — with whales.”

In 2011, when Sieswerda, 75, started leading whale watching tours after retiring from his job at the New York Aquarium, the group logged just three sightings with a total of five whales, he said. More than one whale can be present at any given sighting, he added.

“We called it a whale watch ‘adventure,’ because it was an adventure, if we were going to see whales or not,” said Sieswerda.“Then in 2014, the number of whales we saw was more than the previous three years put together.”

Read and watch the full story at ABC News

Dolphins in Chesapeake Bay: Unusual, or No Big Deal?

August 18, 2017 — Earlier this summer, we started hearing reports of dolphins in the Chesapeake Bay. Some thought it was unusual, others said it was no big deal. So Joel McCord went searching for them for Chesapeake: A Journalism Collaborative.

Dr. Helen Bailey, who did her PhD work on bottle nose dolphins, says she heard reports of occasional sightings of the marine mammals when she came to work as an associate professor at the University of Maryland’s Center for Environmental Science in Solomons.

But then the underwater microphones the lab was experimenting with began picking up the tell-tale squeaks and clicks of dolphins foraging in the Chesapeake and its tributaries. Now, the scientists are finding out the dolphins are pretty regular visitors to the bay.

“We were discovering that we were actually detecting dolphins quite frequently during June, July and August,” she said. “And so then put another hydrophone in the Potomac River and there we were detecting dolphins every day.”

She says they’ve been detected throughout the bay and many of its tributaries. But what drew them into the Bay?

“We think that they’re following the prey into the bay,” Bailey says. “And getting a better understanding of how that is working is really important to understanding the eco system.”

Read and listen to the full story at WVTF

Trump administration cancels proposed limits on marine mammals and sea turtles trapped in fishing nets

June 12, 2017 — The Trump administration announced Monday that it has canceled proposed limits on the number of endangered whales, dolphins and sea turtles that can be killed or injured by sword-fishing nets on the West Coast.

Although the restriction, proposed in 2015, was supported by both the fishing industry and environmental groups, the National Oceanic and Atmospheric Administration’s fisheries division said studies show that the pending rule is not warranted because other protections have dramatically reduced the number of marine mammals and turtles trapped in long, drifting gill nets.

“The fishery has been under pressure for years to reduce its impact, and it has been very successful doing that,” said Michael Milstein, a NOAA fisheries spokesman. “The cap would have imposed a cost on the industry to solve a problem that has already been addressed.”

The decision brought immediate criticism from environmental groups that had joined the Pacific Fishery Management Council in an effort to further protect a variety of marine mammals and turtles.

The list included endangered fin, humpback, and sperm whales; short-finned pilot whales and common bottlenose dolphins; as well as endangered leatherback sea turtles, loggerhead sea turtles, olive ridley sea turtles and green sea turtles.

Read the full story at the Los Angeles Times

Don’t Feed The Dolphins: Scientists Warn

February 13, 2017 — Well-meaning humans who just can’t resist throwing fish overboard to attract wild bottlenose dolphins may be doing the creatures more harm than good. A recent study that draws on data collected in Sarasota Bay in cooperation with Mote Marine Laboratory cast light on the dangers, even when inadvertent and accidental feedings are involved.

“This is the first study that directly links human-related feeding of wild dolphins – intentional or not – with increase risks of injury from human interactions such as boat strikes, entanglement in fishing gear or ingestion of hooks and line,” said Dr. Katie McHugh, staff scientist of the Chicago Zoological Society’s Sarasota Dolphin Research Program. That program is a collaboration with Mote Marine.

Read the full story at the Clearwater Patch