Saving Seafood

ALASKA: Steller sea lions most likely victims of human-caused marine mammal deaths in Alaska

August 22, 2022 — Over a five-year period, 867 Alaska sea lions, seals, whales and small cetaceans like dolphins died or were gravely injured from interactions with humans, according to a report newly released by the National Oceanic and Atmospheric Administration.

The report, required by the Marine Mammal Protection Act, lists documented cases of human-inflicted harm from 2016 to 2020 to mammal species managed by NOAA’s National Marine Fisheries Service.

The vast majority of cases involve entanglements in fishing gear or marine debris, and Steller sea lions made up the vast majority of the animals that fell victim, said the report, which was released by the NMFS Alaska Fisheries Science Center.

Read the full article at Alaska Public Radio

Is That Steller Sea Lion in Distress? Waving? Or Is It …Thermoregulation?

May 7, 2021 — The following was released by NOAA Fisheries:

Imagine that you are enjoying a wonderful day along Alaska’s rocky shores when suddenly you see something strange in the water. Is that an orca? You look through your binoculars and realize it is a Steller sea lion. You see its flipper in the air, and it only surfaces its head to breathe once in a while. Is it sick or injured? Or is this normal behavior?

NOAA Fisheries often receives reports of Steller sea lions exhibiting this behavior from concerned citizens who think the sea lion may be in distress.

“When people get hot or cold, they can remove or add a layer of clothing,” explains Steller sea lion expert Kim Raum-Suryan of NOAA’s Alaska Regional Office. “Since Steller sea lions don’t have this option, they do something a little different. They instead have this amazing ability to use thermoregulation—in other words, to regulate their own body temperature. “

A Steller sea lion’s core body temperature is about 100°F. Heat loss in water is about 25 times faster than in air. Steller sea lions deposit most of their body fat into a thick layer of blubber just under the skin. This blubber layer insulates the sea lion’s body from the cold water and provides an excess energy reserve.

However, the flippers are poorly insulated, with the blood vessels close to the surface of the skin. Sea lions often regulate their own body temperature by lifting and exposing one or more flippers as they are floating on the surface of the water. The blood vessels just under the skin dilate and either absorb heat from, or release heat to, the environment. Absorbed heat is then circulated to the rest of the body.

If you ever see a stranded, injured, entangled, or dead Steller sea lion or other marine mammal, please call the NOAA Fisheries Alaska Statewide 24-hour Stranding Hotline at (877) 925-7773. But the next time you see a sea lion or a group of sea lions with their flippers extended out of the water, there’s no need to call. This is just normal sea lion behavior … but you can wave back if you want to!

Read the full release here

Alaska Fishermen Sentenced for Killing Endangered Sea Lions

November 8, 2018 — An Alaska salmon boat skipper who killed endangered Steller sea lions with a shotgun and hindered an investigation has been fined $20,000 in federal court.

Jon Nichols, 31, of Cordova, was sentenced Tuesday to five years’ probation, three months of home confinement and 400 hours of community service.

U.S. Magistrate Judge Deborah Smith also ordered Nichols to publicly apologize in a national commercial fishing magazine.

One of Nichols’ crewmen, Theodore “Teddy” Turgeon, 21, of Wasilla, also shot the endangered animals. He was sentenced to four years’ probation, one month of home incarceration and 40 hours of community service. He was fined $5,000.

Steller sea lions are the largest members of “eared” seals family, according to the Alaska Department of Fish and Game and can live to be 20 to 30 years old. Females can reach nearly 580 pounds (263 kilograms) and males up to 1,245 pounds (565 kilograms) in the North Pacific Ocean. They get their name from the big males’ intimidating roar as they protect harems.

Steller sea lions are voracious feeders of fish. Adults eat upward of 6 percent of their body weight per day. They target fish that are always available such as pollock and cod as well as seasonally available fish such as herring and salmon.

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

ALASKA: Oil spill cleanup under way north of Kodiak

March 1, 2018 — A unified command has been established and efforts for clean-up operations are under way at the site of an oil spill north of Kodiak that supports northern sea otters and Steller sea lions, both of which are listed under the Endangered Species act.

Eagles, waterfowl and seabirds are likely present and Pacific halibut, Pacific cod, walleye Pollock and Pacific herring also are resent in surrounding waters, DEC officials said.

The spill reportedly happened on Feb. 26 after an abandoned building collapsed at Port William on the southern end of Shuyak Island, some 50 miles north northwest of the city of Kodiak. Estimated were that the entire contents of the bladder were released, with up to 3,000 gallons of bunker fuel spilled. The owner of the building had not been identified.

Read the full story at the Cordova Times

 

ALASKA: Underwater camera keeps an eye on Atka mackerel

July 27, 2017 — Counting Atka mackerel became really important, according to National Marine Fisheries Service Biologist Suzanne McDermott, when Steller sea lions were declared endangered in 1997.

“We learned that Atka mackerel are their main food item,” McDermott said. “That’s when we really started looking at them in relation to Steller sea lions.”

McDermott knows the mammals face competition for their food — commercial fishermen. In 2016, Alaska fishermen caught and kept 55,000 metric tons of Atka mackerel and discarded another 532 tons as bycatch.

This summer, McDermott and her colleague David Bryan traversed the Aleutian Chain to answer a big question: are there enough fish to support both endangered Steller sea lions and commercial fishermen?

Read and listen to the full story at Alaska Public Media

Mixing new technology and people power for an accurate count of endangered Steller sea lions

October 4, 2016 — Fall at the Alaska Fisheries Science Center means researchers are sifting through all the data they collected over the summer months in the field. For the Steller sea lion team that means reviewing hundreds of thousands of photos.

Every summer AFSC’s Marine Mammal Lab scientists conduct Steller sea lion surveys along the Aleutian Island chain, an area of concern for the endangered Steller sea lion. Sea lions in the central and western Aleutian Islands have continued to decline.

During the surveys, scientists take expansive photographs from the air and ground, capturing rugged coastlines filled with thousands of sea lions. They also look for permanently marked animals to learn how certain individuals are faring over the course of their lives.

Advanced technology like hexacopter drones offer easier access to hard to reach locations where Steller sea lions live. Sophisticated maps and data visualizations clearly showcase detailed information and effectively demonstrate patterns and trends, especially to the general public. All of this leads to better insights and more accurate assessments about the health of the endangered population.

Read the full story at the Alaska Fisheries Science Center

Scientists use drones to study sea lions in Aleutians

September 30, 2016 — ANCHORAGE, Alaska — Scientists are using drone technology to track declining Steller sea lion populations in Alaska.

Every summer researchers from the National Oceanic and Atmospheric Administration (NOAA) Marine Fisheries Science Center study the animals along the Aleutian Island chain.

They use a variety of methods to count the sea lions including stationary game cameras and manned aircraft that fly over a region where scientists can take pictures.

Since 2014, they’ve been using a hexacopter, or drone, to survey areas as well.

Fish biologist Katie Sweeney said the drones won’t replace the manned aircraft but are useful in Alaska’s inclement weather.

“They tried to survey around the Delarof Islands and there wasn’t good weather. It was foggy, low ceilings, which is a challenge,” Sweeney explained in a Skype interview from Seattle. “That means those sites that were missed we can go to next year when we’re on our research vessel cruise and survey them with a hexacopter so we can fill in those gaps.”

Read the full story at KTVA