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Population of prized tuna species decline as protections ease in the Gulf of Mexico

September 14, 2020 — The recent easing of tuna protections in the Gulf of Mexico and fishing restrictions elsewhere in the Atlantic Ocean may be contributing to rapid and widespread declines for one of the most highly prized but critically threatened tuna populations.

A new report by an international tuna conservation commission indicates the stock of Atlantic bluefin tuna has plummeted to just 13% of its levels 70 years ago. The fish, one of the most valuable seafoods in the world, had shown signs of recovery in recent years, thanks partly to robust protections the U.S. enacted five years ago in the Gulf – the only major spawning area for western Atlantic bluefin. Those protections were eased this year by President Donald Trump’s administration.

“These are big concerns,” said Grantly Galland, a marine biologist with Pew Charitable Trusts. “We had early signals of recovery but raising the fishing quota and now getting rid of the protections in the Gulf of Mexico means the western population of bluefin is under threat again.”

Read the full story at NOLA.com

MASSACHUSETTS: Despite increased supply, South Shore fishermen are finding demand for Atlantic bluefin tuna is way down

July 20, 2020 — The population of Atlantic bluefin tuna is rebounding off the eastern seaboard, which should mean a banner year for fisherman but the normally high-priced fish is not in demand as its main markets are closed or doing little business during the pandemic.

“It’s all about supply and demand and there’s no demand for them, so the dealers don’t want to keep buying them if they’re not able to keep selling them,” fisherman Greg Ares, based out of Green Harbor in Marshfield, said. “Maybe within the next week or two, restaurants will be opened up in the U.S., sushi restaurants, and they will purchase our bluefin tuna. Even if I get $6 a pound, that’s good enough to keep going.”

There are two types of bluefin tuna fishermen — those who use a harpoon and those who use a rod and reel, the latter making up the vast majority of commercial licenses.

Read the full story at Wicked Local

Worldwide slowdown in fishing unlikely to save rare species

June 30, 2020 — Commercial fishing taking place worldwide has dipped since the start of the coronavirus pandemic, but scientists and conservation experts say it’s unclear if the slowdown will help endangered species of marine life recover.

Hours logged by fishermen at sea fell by nearly 10% around the world after the March 11 declaration of a pandemic, and in some hard-hit countries such as China, fishing completely stopped. The fishing decline has spurred questions about food security, ocean management and global trade.

As countries begin to resume fishing, new questions are emerging about whether an extended fishing slowdown could help rare ocean animals, such as the North Atlantic right whale. The whale numbers only about 400 and is vulnerable to fatal entanglement in fishing gear.

Less fishing could also help jeopardized fish stocks of the Mediterranean Sea, which is home to the overfished Atlantic bluefin tuna. And many rare species are vulnerable to accidental catch, called bycatch, in fishing gear.

Read the full story at the Associated Press

Assessors must reconsider parts of potential bluefin MSC certification

June 29, 2020 — An independent adjudicator, analyzing formal objections to the potential Marine Stewardship Council certification of the Usufuku Honten East Atlantic bluefin tuna fishery, has upheld one of the four objections presented.

The objections were presented by the World Wildlife Fund and The Pew Charitable Trusts in January, after the assessment body, Control Union Pesca Ltd., recommended that the fishery be certified in December 2019. Of the four objections, the independent adjudicator upheld objections to the evidence used to conclude how long bluefin tuna take to grow and reproduce, according to a release from MSC.

Read the full story at Seafood Source

Measuring Atlantic Bluefin Tuna with a Drone

June 10, 2020 — This novel use of drones is a promising way to remotely monitor these hard-to-see fish

Researchers have used an unmanned aerial system (or drone) to gather data on schooling juvenile Atlantic bluefin tuna in the Gulf of Maine.

This pilot study tested whether a drone could keep up with the tuna while also taking photographs that captured physical details of this fast-moving fish. The drone was equipped with a high-resolution digital still image camera. Results show that drones can capture images of both individual fish and schools. They may be a useful tool for remotely monitoring behavior and body conditions of the elusive fish.

Individual fish lengths and widths, and the distance between fish near the sea surface, were measured to less than a centimeter of precision. We used an APH-22, a battery-powered, six-rotor drone. The pilot study was conducted in the Atlantic bluefin tuna’s foraging grounds northeast of Cape Cod in the southern Gulf of Maine.

“Multi-rotor unmanned aerial systems won’t replace shipboard surveys or the reliance on manned aircraft to cover a large area,” said Mike Jech, an acoustics researcher at the Northeast Fisheries Science Center in Woods Hole, Massachusetts and lead author of the study. “They have a limited flight range due to battery power and can only collect data in bursts. Despite some limitations, they will be invaluable for collecting remote high-resolution images that can provide data at the accuracy and precision needed by managers for growth and ecosystem models of Atlantic bluefin tuna.”

Read the full story at Environment Coastal & Offshore

MSC faces NGO criticism in Atlantic bluefin hearing, new report

June 2, 2020 — In a hearing taking place 1 and 2 June, the World Wildlife Fund (WWF) is questioning the merits of the Marine Stewardship Council’s (MSC) certification of the first Atlantic bluefin tuna fishery, citing a “questionable evaluation process that has repeatedly ignored the fragile status of the stock.”

According to WWF, MSC’s current certification of the bluefin tuna fishery has dismissed “the best available science and therefore produced a evaluation of the fishery that does not reflect the reality at sea.”

Read the full story at Seafood Source

84% of Global Tuna Catch Comes from Stocks at Healthy Levels, While 15% Require Stronger Management

April 2, 2020 — The following was released by the International Seafood Sustainability Foundation:

Of the total commercial tuna catch worldwide, 84% came from stocks at “healthy” levels of abundance, according to the March 2020 International Seafood Sustainability Foundation (ISSF) Status of the Stocks report. In addition, 15% of the total tuna catch was from overfished stocks, and 1% was from stocks at an intermediate level of abundance. The previous version of this report was released by ISSF in October 2019.

Several tuna stocks worldwide are considered overfished and/or subject to overfishing:

  • The Atlantic Ocean bigeye, Eastern Pacific yellowfin, Indian Ocean yellowfin and Pacific bluefin tuna stocks are currently overfished and subject to overfishing.
  • Overfishing is occurring as well on three other stocks: Eastern Pacific bigeye, Indian Ocean bigeye and Indian Ocean albacore.
  • All skipjack and most albacore stocks are healthy.

Ratings for the following species have changed since last reported in October: 

  • The Spawning Biomass (SSB) ratio for Atlantic Ocean yellowfin has improved from yellow to green.
  • The fishing mortality rate ratio for Indian Ocean bigeye has downgraded from green to orange.
  • The fishing mortality ratio for Indian Ocean albacore has downgraded from green to orange.

ISSF publishes its signature Status of the Stocks report twice each year using the most current scientific data on 23 major commercial tuna stocks.

Key Statistics in the Report

  • ​​Abundance or “spawning biomass” levels: Globally, 65% of the 23 stocks are at healthy levels of abundance, 17.5% are overfished and 17.5% are at an intermediate level.
  • Fishing mortality levels: 70% of the 23 stocks are experiencing a well-managed fishing mortality rate, and 30% are experiencing overfishing.
  • Total catch: In 2018, the catch of major commercial tuna stocks was 5.1 million tonnes. 58% was skipjack tuna, followed by yellowfin (29%), bigeye (8%) and albacore (4%). Bluefin tunas accounted for 1% of the global catch.
  • Largest tuna catches by stock: The five largest catches in tonnes, unchanged since the previous report, are Western Pacific Ocean skipjack, Western Pacific Ocean yellowfin, Indian Ocean skipjack, Indian Ocean yellowfin and Eastern Pacific Ocean skipjack.
  • Tuna production by fishing gear: 66% of the catch is made by purse seining, followed by longline (10%), pole-and-line (8%), gillnets (4%) and miscellaneous gears (12%).  These percentages changed minimally since the previous report.

The Status of the Stocks report is reviewed by the ISSF Scientific Advisory Committee, which provides advice on its content. The report does not advocate any particular seafood purchase decisions.

New Requirements Protect Bluefin Tuna, Expand Opportunities in Other Fisheries

March 31, 2020 — The following was released by NOAA Fisheries:

Today, NOAA Fisheries announced measures that provide more fishing opportunities for vessels targeting Atlantic swordfish and some tuna species. We will continue under these measures to protect bluefin tuna from overfishing.

The changes give fishermen using pelagic longlines access to new fishing areas originally closed to reduce the number of bluefin caught unintentionally. Under the new rules, longline fishermen in the Gulf of Mexico are also required to use weak hooks only when bluefin tuna are spawning. This means they are only required to use them January through June rather than year-round.

Regardless of where or when they fish, longline fishermen are still not allowed to target bluefin tuna. They can keep some caught unintentionally, but they have to stay within their individual allocation of the U.S. bluefin quota. This allows them to fish for economically valuable species like swordfish and other tunas while protecting bluefin.

The measures are in part a response to the success of the Individual Bluefin Quota (IBQ) Program in reducing bluefin bycatch. We also designed the measures to help reverse a trend of underharvesting the U.S. swordfish quota.

“The success of the IBQ Program has allowed us to simplify and streamline Atlantic HMS management,” said Randy Blankinship, who leads the group responsible for managing Atlantic bluefin in the United States. “With this rule, we are optimizing fishing opportunities for pelagic longline fishermen while continuing to manage and conserve bluefin tuna through the IBQ program and other management measures.”

Read the full release here

Why marine protected areas are often not where they should be

March 26, 2020 — There’s no denying the grandeur and allure of a nature reserve or marine protected area. The concept is easy to understand: limit human activity there and marine ecosystems will thrive.

But while the number of marine protected areas is increasing, so too is the number of threatened species, and the health of marine ecosystems is in decline.

Why? Our research shows it’s because marine protected areas are often placed where there’s already low human activity, rather than in places with high biodiversity that need it most.

Not where they should be

Many parts of the world’s protected areas, in both terrestrial and marine environments, are placed in locations with no form of manageable human activity or development occurring, such as fishing or infrastructure. These places are often remote, such as in the centres of oceans.

And where marine protected areas have been increasing, they’re placed where pressures cannot be managed, such as areas where there is increased ocean acidification or dispersed pollution.

Read the full story at PHYS.org

‘Tuna King’ buys 608-pound fish for $1.8 million at Sunday auction in Japan

January 7, 2020 — One fish, two fish, red fish… million-dollar tuna fish.

Japanese businessman Kiyoshi Kimura, who has dubbed himself the “Tuna King,” purchased a 608-pound fish for $1.8 million at a Sunday auction.

The blue fin fetched the second-highest price in history at auction Sunday, Japanese Broadcasting Corporation NHK reported.

Caught in Aomori, a political region of Japan, the giant fish sold for 193 million yen — equivalent to nearly $1.8 million.

“Yes, this is expensive, isn’t it? I want our customers to eat very tasty ones this year, too,” Kimura said after the auction, as reported by Agence France-Presse.

Read the full story at the New York Daily News

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