Saving Seafood

Meet Dr. Anne Hollowed, Renowned For Her Work Assessing the Effects of Climate and Ecosystem Change on Fish Stocks

April 13, 2020 — The following was released by NOAA Fisheries:

Dr. Anne Hollowed is a Senior Scientist with the NOAA Fisheries Alaska Fisheries Science Center. She conducts research on the effects of climate and ecosystem change on the current and future status of fish and fisheries. She leads the Status of Stocks and Multispecies Assessment program. Anne currently serves as co-chair of the North Pacific Fishery Management Council’s Scientific and Statistical Committee. She is also an Affiliate Professor with the School of Aquatic and Fishery Sciences at the University of Washington.

We asked Anne to share a little bit about herself, what inspired her to pursue a career in fisheries science and what she would recommend for other young scientists interested in getting into the field.

When did you know you wanted to be a fisheries scientist?

My mother was a chemist and she nurtured my interest in science. I spent my summers in Kansas, at a family retreat. Time spent disconnected from the fast pace of the world allowed me to explore the diversity of nature and animal behavior. By the time I entered college I knew I wanted to pursue a degree in biology. My decision to pursue a career in ocean studies was formed during my semester abroad. I attended Lawrence University, a small liberal arts college in Wisconsin. My professors taught an interdisciplinary course in oceanography that included field work on Andros Island in the Bahamas. It only took one open ocean dive for me to know that I wanted to spend the rest of my career studying the ocean.

Read the full release here

Helping Scientists Protect Beluga Whales with Deep Learning

March 11, 2020 — In the U.S., there are five populations of beluga whales, all in Alaska. Of those five, the Cook Inlet population is the smallest and has declined by about seventy-five percent since 1979. Subsistence hunting contributed to this initial population drop, but this practice was regulated starting in 1999, with the last hunt in 2005. Still, the beluga whale population in Cook Inlet has yet to recover. This population was listed as an endangered species in 2008, with hopes that the population would begin to recover in the near future, but more than a decade later they continue to decline, with a current population estimate of 328 whales.

Like other toothed whales, beluga whales rely highly on sound. They produce acoustic signals to find prey and to communicate; consequently, scientists can use acoustic recordings to study beluga populations and behavior. In 2008, the NOAA (National Oceanographic and Atmospheric Administration) Alaska Fisheries Science Center, in partnership with the Alaska Department of Fish and Game, put together an acoustic research program to continuously monitor beluga whale habitat. This program has two main objectives: (1) studying beluga whale behavior and population size, and (2) understanding the extent to which human-generated noise is disrupting beluga populations.

In the past, with raw audio recordings collected by underwater moorings, NOAA scientists used a very basic detector — based on energy levels in certain frequencies — to detect acoustic signals from beluga whales. This detector was tuned toward high recall, i.e., it was tuned to make sure that it didn’t miss any beluga sounds, but consequently allowed many sounds to pass through that were false positives, i.e. uninteresting background noise. Consequently, manual validation was required for each of those detections. This validation process is very time-consuming and labor-intensive, which limits the number of sensors that the team can deploy, and also limits the speed with which the team can provide answers to critical conservation questions.

Read the full story at Medium

Exploring Women’s Engagement in 30 Years of Alaska Fisheries

February 7, 2020 — The following was released by NOAA Fisheries:

Women play an integral, multifaceted—and until now, largely invisible—role in Alaska fisheries. The first comprehensive study of women’s participation, incorporating gender into 30 years of existing data, shows women participate in Alaska fisheries differently than men.

“Women are really important players in Alaska’s commercial fisheries. They’re key  in contributing to family adaptability and in turn to community resilience,” said Marysia Szymkowiak, the scientist who conducted the Alaska Fisheries Science Center study. “Knowing how women participate directly in fishing and within fishing families and communities is critical to predicting and understanding responses to fishery changes—from individuals, to families, all the way up to communities.”

Historically, fisheries data on participants have not included gender. Such a gender-blind approach limits our understanding of access, mobility, and empowerment issues and can  actually lead to gender biases.

“Not examining fisheries participation for women and men separately implies that there are no differences between them in our fisheries. That’s a flawed assumption with potentially negative social and ecological implications if women and men participate differently—and this research shows that they do,” said Szymkowiak.

Beyond direct participation in the harvesting sector of commercial fishing, women perform many other jobs that are vital to fishing success. Women step in where needed to adapt to changing fishing and family situations. This includes shoreside employment, working on family boats, direct marketing, and engaging in the political process. This essential but “invisible” work is not captured in fisheries statistics.

“We cannot ignore the critical role that gender plays,” Szymkowiak said. “Understanding when, how, and where women fish, and what limits their participation, is essential if we are to maintain and promote community resilience in the face of huge ecological, market, and management changes in our fisheries.”

Read the full release here

Scientists, Fishermen Team Up to Track Cod in Alaska’s Outermost Aleutian Islands

January 9, 2020 — SEAFOOD NEWS — Last winter scientists and Alaskan fishermen agreed to launch a pilot study to develop methods for tagging cod on active commercial fishing vessels in the Aleutian Island.

Satellite tags had never been used on Pacific cod. No one had recorded seasonal movements of cod in the Aleutian Islands. This was the first time industry, scientists, and the fishing community all took part in the research.

Read the full story at Seafood News

The Blob returns: Alaska cod fishery closes for 2020

December 11, 2019 — The Gulf of Alaska’s federal cod fleet is bracing for a complete shutdown in 2020 after an 80 percent TAC cut in 2018 and another 5 percent last year, down to 17,000 tons.

The North Pacific Fishery Management Council announced its decision on Friday, Dec. 6, in response to low recruitment.

“We’re on the knife’s edge of this overfished status,” said Council Member Nicole Kimball, vice president of Alaskan operations for the Pacific Seafood Processors Association.

The fall 2019 stock assessment returned biomass numbers for gulf cod below the necessary threshold as a food source for the endangered Steller sea lion.

The infamous Blob of 2014 — a mass of warm water that hovered in the Gulf of Alaska — likely depleted the cod’s food supply and severely restricted recruitment. The fall 2017 Gulf of Alaska survey yielded historically low numbers at 46,080 metric tons, down more than 80 percent since 2013.

“That warm water was sitting in the gulf for three years starting in 2014, and it was different than other years in that it went really deep and it also lasted throughout the winter,” said Steven Barbeaux with the Alaska Fisheries Science Center in Seattle. “You can deplete the food source pretty rapidly when the entire ecosystem is ramped up in those warm temperatures.”

Read the full story at National Fisherman

Can crab and fish in Alaska adapt to more acidic oceans? Scientists aim to find out.

November 1, 2019 — Researchers are looking for ways that crab and fish in Alaska may be able to adapt to more acidic ocean water.

With carbon dioxide levels rising on the planet, ocean water absorbs some of that CO2 and water becomes more acidic. That change is already impacting a variety of sea creatures.

Members of the Alaska Ocean Acidification Network gave an update to Alaska’s Board of Fisheries and a public presentation on the topic in Anchorage in October. The network is a group of researchers, managers, and stakeholders interested in the looming problem.

“It’s not that there hasn’t been variability in the amount of carbon dioxide. It’s not that this hasn’t happened before,” said Robert Foy, director of NOAA Fisheries Alaska Fisheries Science Center. “It’s the speed at which it is happening during our lifetime and whether or not the animals and plants in the ocean are able to adapt fast enough given the speed at which it’s occurring.”

Read the full story Alaska Public Media

NOAA trawl surveys estimate more cod, pollock in Bering Sea

October 29, 2019 — The results from recent US government trawl surveys of the Bering Sea are in and they estimate the biomass of pollock and Pacific cod have risen relative to previous years.

Two vessels — Alaska Knight and Vesteraalen — completed summer surveys of the eastern and northern Bering Sea from the US National Oceanic and Atmospheric Administration’s (NOAA) Alaska Fisheries Science Center.

The AFSC said in a presentation that the trawl surveys led scientists to estimate the pollock biomass at 5.46 million metric tons for the Eastern Bering Sea, a 75% year-on-year rise and 1.17m metric tons for the Northern Bering Sea, compared to the last major survey, which was performed in 2017.

For Pacific cod, the surveys led to an increased biomass estimate of 517,000t in the Eastern Bering Sea, a 2% y-o-y rise and an estimate of 368,000t for the Northern Bering Sea, up 30% from 2017.

Read the full story at Undercurrent News

Genetic studies confirm Alaska cod stocks pushing north

October 25, 2019 — Biologists were shocked in 2017 when they found that the numbers of Pacific cod had risen exponentially in the northern Bering Sea off the coast of Alaska. Now, researchers at NOAA’s Alaska Fisheries Science Center have used genetic testing to prove that those fish, enabled by warming waters and a lack of sea ice, have moved north from the southeastern Bering Sea.

Surveys as recent as the 1970’s revealed “trace amounts” of cod in the northern Bering Sea, according to a brief released by NOAA. Major Alaska cod fisheries in the past decades have operated in the southeastern Bering Sea, the Aleutian Islands, and the Gulf of Alaska, which meant management biologists conducted only sporadic bottom trawl surveys in the north.

Read the full story at Seafood Source

Anchorage talk will dive into ocean acidification’s impact on Alaska marine life

October 16, 2019 — Hundreds of fishery stakeholders and scientists will gather in Anchorage next week as the state Board of Fisheries begins its annual meeting cycle with a two-day work session.

The seven-member board sets the rules for the state’s subsistence, commercial, sport and personal use fisheries. It meets four to six times each year in various communities on a three-year rotation; this year the focus is on Kodiak and Cook Inlet.

The fish board and the public also will learn the latest on how a changing climate and off-kilter ocean chemistry are affecting some of Alaska’s most popular seafood items at an Oct. 23 talk and Q&A on ocean acidification in Alaska.

They may also be surprised to learn that only two studies have looked at salmon response to ocean acidification, and both were conducted outside Alaska.

Most of the research to date has focused specifically on crab and fish stocks, said Bob Foy, director of the Alaska Fisheries Science Center at the NOAA Auke Bay lab in Juneau who will lead the Anchorage presentation.

Read the full story at the Anchorage Daily News

Genetic Evidence Points to Rapid, Large-Scale Northward Shift of Pacific Cod During Recent Climate Changes

October 10, 2019 — The following was released by NOAA Fisheries:

New genetic research suggests that unprecedented summer abundances of Pacific cod in the northern Bering Sea were due to escalating movement from their core habitat under recent warm conditions.

Until recently, Pacific cod were rarely encountered in the northern Bering Sea. Fishery surveys in the 1970s reported “trace amounts” of cod there. A 2010 Alaska Fisheries Science Center survey estimated that the entire northern population amounted to about 3% of the large southeastern Bering Sea stock that supported a valuable commercial fishery.

Then in 2017, the summer survey recorded dramatically higher abundances in the north: a 900-fold increase since 2010. In the same year, southeastern Bering Sea abundances were down 37% from 2016. Strikingly, the increase in the north nearly matched the decrease in the southeastern Bering Sea.

A 2018 survey revealed an even more remarkable shift: there were more cod in the northern than southeastern Bering Sea.

Read the full release here