Saving Seafood

New regional shark research consortium established

December 2, 2020 — The fatal great white shark attack on swimmer Julie Dimperio Holowach in July in Harpswell, Maine, caught many in the shark research community by surprise.

While it was known that some great whites do travel north into Canadian waters in the summer, there was little in the way of sightings, and just a smattering of attacks on seals.

Holowach was the only confirmed fatality from a shark attack in Maine history, according to Patrick Keliher, state Division of Marine Resources director. Cape Cod, with hundreds of great whites patrolling beaches and daily sightings in the summer months, has had two major attacks on swimmers and a fatal attack on a bodyboarder.

“The incident really did rattle the state of Maine, and justifiably,” said Gregory Skomal, Massachusetts Division of Marine Fisheries shark expert. “A lot of us doing work on white sharks reached out to assist.”

Read the full story at the Cape Cod Times

Hawaii Longline Vessels to Improve Shark Conservation with Gear Change

November 30, 2020 — The following was released by the Hawaii Longline Association:

Hawaii-based longline vessels will voluntarily switch to monofilament leaders to promote shark conservation, the Hawaii Longline Association (HLA) has announced.

The Hawaii longline fishery is among the most comprehensively managed in the world. With around 140 active vessels based out of Honolulu Harbor, the fleet is highly monitored and subject to a suite of leading protected species mitigation measures. These measures include requiring 45-gram minimum weights so that hooks will sink quickly out of seabird foraging depths, as well as the use of a type of “circle” hook that reduces the severity of interactions with sea turtles and false killer whales.

Although beneficial for sea turtles and false killer whales, sharks are more likely to be caught by the circle hooks. Hawaii longline vessels don’t retain sharks and most are released alive, but since most sharks are unable to bite through a wire leader, some sharks die on the line. Unfortunately, this includes oceanic whitetip sharks, which are now listed as “Threatened” under the Endangered Species Act.

Switching to monofilament leader material will allow sharks to bite through the line just above the hook, thus reducing the severity of the interaction that otherwise would occur using wire leaders. Monofilament leaders will also facilitate releasing sharks and other animals, as the material is much easier to cut than wire. Crew safety remains paramount, and the transition to monofilament leaders will be phased to ensure safety. However, the Hawaii Longline Association is setting July 1, 2021 as the target for the fleetwide conversion.

“This is an industry-led initiative to promote shark conservation and another example of the Hawaii longline fleet as a global leader in responsible fishing practices,” says HLA Executive Director Eric Kingma, PhD.

Read the full release here

Scientists to Set Acceptable Biological Catch for American Samoa Bottomfish and Consider Rebuilding Plan Options

November 25, 2020 — The following was released by the Western Pacific Regional Fishery Management Council:

Scientists from throughout the Pacific will meet Nov. 30 to Dec. 1, 2020, to discuss fishery management issues and make management recommendations for fisheries in the Western Pacific Region. The meeting of the Scientific and Statistical Committee (SSC) of the Western Pacific Regional Fishery Management Council will be held virtually and is open to the public. The full agenda, background documents and instructions for connecting to the meeting and providing oral public comments are available at www.wpcouncil.org/event/138th-scientific-and-statistical-committee-meeting. Among the agenda items are the following:

American Samoa Bottomfish

The SSC will set the acceptable biological catch for the American Samoa bottomfish fishery for fishing years 2021-2022. The best scientific information available for fishery management decisions is the 2019 stock assessment from the National Marine Fisheries Service (NMFS) with catch projections to 2025. Based on this information, the maximum sustainable yield (MSY) is estimated to be 20,800 pounds and the overfishing limit in 2022 is 5,000 pounds. A panel of fishermen, fishery scientists and managers evaluated the scientific uncertainties associated with the assessment and quantified a risk level for the SSC to consider.

The 2019 benchmark stock assessment found the American Samoa bottomfish fishery to be overfished and subject to overfishing. The Council, in consultation with its SSC, must develop and implement within two years a plan that would rebuild the overfished stock within 10 years. At the same time, the Council must immediately end overfishing. The current projection from NMFS shows the stock could rebuild within 10 years with an annual catch limit ranging between 0 to 1,500 pounds. NMFS has issued a final rule to implement an interim catch limit of 13,000 pounds that would reduce overfishing and allow biomass to increase while minimizing socio-economic impacts to fishing communities. At the end of the 2020 interim measure, NMFS will review the performance of the fishery and could extend the measure for an additional period not to exceed 186 days in 2021.

The SSC may provide scientific advice on potential options that could simultaneously rebuild the bottomfish stock and end overfishing.

Guam Bottomfish

The NMFS 2019 stock assessment found the Guam bottomfish stock to be overfished, but not experiencing overfishing. At its March 2020 meeting, the Council voted to specify the annual catch limit for the bottomfish fishery at 27,000 pounds for fishing years 2020 to 2023. This annual catch level would allow the biomass to rebuild to MSY within four years (2024). However, there are no accountability measures in place that would guarantee that the catch would be kept below this level. The SSC is scheduled to discuss the rebuilding plan options and may provide advice to the Council.

Oceanic Whitetip Sharks

The Council’s Oceanic Whitetip Shark Working Group met and recommended research priorities and identified improvements needed to reduce fishery impacts on the species. Incidental catches of oceanic whitetip sharks have declined since international non-retention measures were enacted throughout the Pacific. According to projections, the stock should recover if catches remain 10-20% below 2016 levels. U.S. impacts on the population are expected to remain low relative to foreign fisheries, with U.S. longline fisheries impacting 1.2% of spawning potential by 2031. Based on the working group’s findings, the SSC may have recommendations on observer coverage and improved handling of released sharks, such as reducing trailing gear.

North Pacific Striped Marlin

Based on a Council recommendation to phase in catch reductions for striped marlin, the SSC will review and may recommend catch and/or effort levels for North Pacific striped marlin and allocations for international catch limits. The stock has been internationally overfished per a 2019 NMFS stock assessment presented at the June 2020 Council meeting. The Council is required to address, within one year, relative impacts of domestic fisheries and international overfishing per the Magnuson-Stevens Fishery Conservation and Management Act. U.S. Pacific fisheries, including the Hawaiʻi longline fishery, landed approximately 22% of reported North Pacific striped marlin catch from 2013 to 2017.

Recommendations made by the SSC on these and other matters will be considered by the Council when it meets Dec. 2-4, 2020, virtually with host sites at BRI Building, Suite 205, Kopa Di Oru St., Garapan, Saipan, Commonwealth of the Northern Mariana Islands (CNMI); and Tedi of Samoa Building, Suite 208B, Fagatogo Village, American Samoa. Instructions on connecting to the web conference, agendas and briefing documents will be posted at www.wpcouncil.org/meetings-calendars. Host sites are subject to local and federal safety and health guidelines regarding COVID-19; check the Council website for updates.

Here’s why Miami shark researchers are concerned about a potential COVID-19 vaccine

October 28, 2020 — Science’s steady march to find a vaccine capable of ending the coronavirus pandemic may come at the expense of another species: sharks.

Miami shark researchers say they’re concerned about a key ingredient used to make vaccines more effective, squalene — an oily substance found in plants and even human skin — but is particularly concentrated in shark livers.

The practice of using shark-derived squalene as a booster to stimulate a stronger immune response to a vaccine is not unique to the coronavirus vaccine. The compound has been shown to be safe and effective in millions of doses of vaccines, primarily in Europe, said Liza Merly, a shark immunologist at the University of Miami’s Rosenstiel School of Marine and Atmospheric Science.

Read the full story at the Miami Herald

Eastern Pacific is a major supply chain for illegal shark fin trade, researchers find

October 14, 2020 — New research reveals the Eastern Pacific is a particular hotspot for the shark fin trade—and a danger zone for an endangered species fighting for survival.

Florida International University (FIU) postdoctoral researcher Diego Cardeñosa and Demian Chapman, an associate professor of biological sciences and marine scientist in the Institute of Environment, collaborated with scientists in Hong Kong to track and monitor the global shark fin trade using DNA testing.

They tested fins from endangered pelagic thresher sharks (Alopias pelagicus)—a species commonly found in the fin trade. Almost 85 percent of fins sampled from retail markets in Hong Kong and China were genetically traced back to sharks caught in the Eastern Pacific. It’s not the first time the scientists have linked fins from endangered sharks to this specific area.

“The findings weren’t surprising, because earlier this year we discovered the majority of fins from endangered scalloped hammerhead sharks also originated from the Eastern Pacific,” Cardeñosa said. “This is a region with poor fisheries management and poor capacity to enforce international regulations.”

Read the full story at PHYS.org

Are Sharks Being Killed For Coronavirus Vaccines?

October 13, 2020 — Sharks have made international news after Shark Allies, estimated that half a million deep-sea sharks are needed to extract enough squalene for Covid-19 vaccines. The non-profit organization recently came out with the petition to “stop using sharks in a coronavirus vaccine” and use more sustainably sourced alternatives.

But what exactly is ‘squalene’ and why is it possibly in human medicine? Well, first you need to look at basic shark anatomy. Sharks have no swim bladder, unlike bony fish, to help with buoyancy. So, they rely on the lift from their pectoral (side) fins and their large livers that are saturated with oil to maintain their buoyancy in water. Some sharks have a high content of the component squalene (C₃₀H₅₀) in their liver, a highly unsaturated aliphatic hydrocarbon.

According to the Food and Agriculture Organization (FAO), squalene has been/is being used as a “bactericide, an intermediate in the manufacture of pharmaceuticals, organic colouring matter, rubber, chemicals, aromatics, in finishing natural and artificial silk and surface active agents.” Nowadays, squalene is also being used in some adjuvants — common ingredients in vaccines that help create a stronger immune response. What is an adjuvant and why is it added to a vaccine? The Centers for Disease Control and Prevention (CDC) defines an adjuvant as “an ingredient used in some vaccines that helps create a stronger immune response in people receiving the vaccine.” In other words, adjuvants help vaccines work better by helping the body produce an immune response strong enough to protect the person from the disease they are being vaccinated against. The CDC website says that MF59 is a common adjuvant that contains shark-derived squalene. It’s currently found in the Fluad influenza vaccine, licensed for adults 65 or older, and has been used in USA flu vaccines since 2016 with an “excellent safety record.” According to the World Health Organization (WHO), since 1997 a dose of the influenza vaccine (such as FLUAD or Chiron) contains about 10 megagrams of squalene “to make the vaccine more immunogenic.”

Read the full story at Forbes

A Coronavirus Vaccine Could Kill Half A Million Sharks, Conservationists Warn

October 12, 2020 — A conservation group is warning that the development of an effective coronavirus vaccine on a global scale could ravage shark populations worldwide, as researchers race to produce a vaccine using an oil derived from sharks.

Squalene, a compound that is harvested from the livers of sharks, is a common moisturizing ingredient in cosmetics. It’s also used in malaria and flu vaccines as an agent that boosts the immune system’s response.

Shark Allies, a nonprofit that advocates for the protection of sharks, projects that some 500,000 sharks could be killed if a coronavirus vaccine with shark squalene proves to be effective. Already, an estimated 2.7 million sharks are killed annually for their squalene to make cosmetics, according to the group.

“The problem is that squalene, used as an ingredient in a COVID-19 vaccine, will be seen as something that’s unavoidable, and then as it becomes tested, it becomes the normal ingredient, and nothing else will be tested,” Shark Allies executive director Stefanie Brendl told NPR’s Weekend Edition Saturday.

Read the full story at NPR

Florida commercial fishermen still allowed to sell shark fins

October 7, 2020 — When weather permits, Capt. Rich Osburn sails a few days each week from the Fort Pierce Inlet to ply the waters of the Gulf Stream for his targeted catch.

As a commercial shark fisher, Osburn and his crew of one or two deckhands legally deploy six miles of longline in federal waters with about 500 baited hooks. The sharks they are permitted to harvest according to federal guidelines include:

  • Blacktip
  • Bull
  • Lemon
  • Silky
  • Tiger
  • Hammerhead

Osburn said he does not harvest any tigers or hammerheads because there is no value for their meat. They get turned loose. They also are among 26 species of sharks protected from harvest in Florida state waters.

Read the full story at The Ledger

FLORIDA: Gov. DeSantis signs measure banning import and export of shark fins

September 21, 2020 — Gov. Ron DeSantis has signed a measure into law banning the import and export of shark fins in Florida.

Sen. Travis Hutson sponsored the bill (SB 680), but the measure is named after the late Kristin Jacobs. She sponsored the House version of the bill (HB 401). Jacobs passed away in April — almost exactly one month after the Legislature approved the legislation — after a yearslong battle with cancer.

“This bill’s really important to the state,” Jacobs said as the Legislature approved a final version of the bill.

Jacobs prioritized banning the shark fin trade. Toward the end of the legislative process, Rep. Toby Overdorf offered an amendment renaming the bill the “Kristin Jacobs Ocean Conservation Act.” That amendment was approved.

“It was an incredible honor and privilege to help Rep. Jacobs across the finish line with this bill,” Overdof said. “The aptly named Ocean Conservancy Act allows her advocacy for the environment and for bipartisan relationships to continue long after her passing.”

Read the full story at Florida Politics

New shark research targets a nearly endangered species

September 16, 2020 — They are some of the most iconic and unique-looking creatures in our oceans. While some may think they look a bit odd, one thing researchers agree on is that little is known about hammerhead sharks. Many of the 10 hammerhead shark species are severely overfished worldwide for their fins and in need of urgent protection to prevent their extinction.

To learn more about a declining hammerhead  that is data poor but in need of conservation efforts, a team of researchers from Nova Southeastern University’s (NSU) Save Our Seas Foundation Shark Research Center (SOSF SRC) and Guy Harvey Research Institute (GHRI), Fisher Finder Adventures, the University of Rhode Island and University of Oxford (UK), embarked on a study to determine the migration patterns of smooth hammerhead sharks (Sphyrna zygaena) in the western Atlantic Ocean. This shark, which can grow up to 14-feet (400 cm), remains one of the least understood of the large hammerhead species because of the difficulty in reliably finding smooth hammerheads to allow scientific study.

To learn about smooth hammerhead behavior, the research team satellite tagged juvenile hammerhead sharks off the US Mid-Atlantic coast and then tracked the sharks for up to 15 months. The sharks were fitted with fin-mounted satellite tags that reported the sharks’ movements in near real time via a satellite link to the researchers.

“Getting long-term tracks was instrumental in identifying not only clear seasonal travel patterns, but importantly, also the times and areas where the sharks were resident in between their migrations,” said Ryan Logan, Ph.D. student at NSU’s GHRI and SOSF SRC, and first author of the newly published research. “This study provides the first high resolution, long term view of the movement behaviors and habitats used by smooth hammerhead sharks—key information for targeting specific areas and times for management action to help build back this depleted species.”

Read the full story at PHYS.org