Sharks Archives - Page 28 of 39

Climate Change May Shrink the World’s Fish

A new study suggests warming sea temperatures could result in smaller fish sizes.

August 22, 2017 — Warming temperatures and loss of oxygen in the sea will shrink hundreds of fish species—from tunas and groupers to salmon, thresher sharks, haddock and cod—even more than previously thought, a new study concludes.

Because warmer seas speed up their metabolisms, fish, squid and other water-breathing creatures will need to draw more oxygen from the ocean. At the same time, warming seas are already reducing the availability of oxygen in many parts of the sea.

A pair of University of British Columbia scientists argue that since the bodies of fish grow faster than their gills, these animals eventually will reach a point where they can’t get enough oxygen to sustain normal growth.

“What we found was that the body size of fish decreases by 20 to 30 percent for every 1 degree Celsius increase in water temperature,” says author William Cheung, director of science for the university’s Nippon Foundation—Nereus Program.

These changes, the scientists say, will have a profound impact on many marine food webs, upending predator-prey relationships in ways that are hard to predict.

“Lab experiments have shown that it’s always the large species that will become stressed first,” says lead author Daniel Pauly, a professor at the university’s Institute for the Ocean and Fisheries, and principal investigator for the Sea Around Us. “Small species have an advantage, respiration-wise.”

Still, while many scientists applaud the discovery, not all agree that Pauly’s and Cheung’s work supports their dramatic findings. The study was published today in the journal Global Change Biology.

Read the full story at National Geographic

NMFS Institutes More Swordfish Research Off Florida, Praised by EDF

August 16, 2017 — SEAFOOD NEWS — Dr. David Kerstetter of Nova Southeastern University will receive an exempted fishing permit (EFP) from the National Marine Fisheries Service (NMFS) to conduct research in the East Florida Coast Pelagic Longline Closed Area. Dr. Kerstetter will be working alongside Atlantic swordfish fishermen in an effort to “improve understanding of encounter rates of juvenile swordfish and species like sharks, bullfishes and sea turtles in order to find the best ways to reduce their mortality.”

According to Katie Westfall, senior manager of highly migratory species advocacy for EDF’s Oceans Program, fishermen have already made sacrifices to help the Atlantic swordfish population rebound. However, this project will help by collecting data from fisheries that “interact with imperiled highly migratory species.”

“The project will also pioneer an approach to link catch data with oceanographic data, allowing researchers to learn over time where and when species will occur in order to help fishermen avoid bycatch of sharks, billfishes, and sea turtles,” Westfall added. “This has the potential to be transformative by dramatically minimizing unnecessary deaths of protected species while improving the catch of healthy target species like swordfish.”

Westfall is hopeful that the research will help “pave the way to responsibly increasing yield in domestic fisheries and strengthening revenues for American seafood businesses.”

This story originally appeared on Seafoodnews.com, a subscription site. It is reprinted with permission.

Warming Waters Bring New Marine Species to NC, But Chase Away Some Familiar Ones

Bull sharks and lion fish are among the species becoming more common in North Carolina, while black sea bass and other fish are getting harder to find.

August 8, 2017 — A big reason reason North Carolina is seeing so much change in its marine species is because the state has an unusual variety of them, said Sara Mirabilio, a researcher and fisheries extension specialist with North Carolina Sea Grant.

Near Cape Hatteras, the cold Labrador Current comes down from the Arctic, and the warm Gulf Stream flows up from the Gulf of Mexico.

“We are at the northernmost range for southern species and the southernmost range for northern species,” she said. “So climate change at the boundaries will show the most impact.”

In many ways climate change is unfolding as the slowest of slow-motion disasters. But fish can move quickly and for long distances when spurred by relatively small changes in water temperature.

Lately they have moved so quickly that fisheries regulations are lagging, and tensions are rising between commercial fishermen based where the fish used to be, and those where the fish have moved.

On a recent day, Mike Ireland’s 99-foot trawler “Sharon Nicole” was docked behind a seafood wholesaler in the Hobucken community east of New Bern, just off the Pamlico Sound.

Shrimp season was under way, but he and his crew were repairing one of the massive, powered winches that haul in their nets. It was an especially crucial one, because it reels in the small net they drag to locate fish.

“This is probably the most important tool on the boat,” Ireland said. “With this little sample net you can really pinpoint where they’re at.”

Read and listen to the full story at WUNC

Great white shark chomps on researcher’s video camera off Cape Cod

The video shows the shark’s teeth and even wrinkles on its tongue.

August 4, 2017 — CHATHAM, Mass. — The top shark scientist in Massachusetts has shot hundreds of great white shark videos, but for the first time one has tried to take a bite of his camera.

Greg Skomal, a researcher with the Massachusetts Division of Marine Fisheries, was tagging great whites with a crew from the Atlantic White Shark Conservancy on Monday off the southern shore of Cape Cod when a shark chomped on his GoPro.

Read the full story from the Associated Press and watch the video at the Portland Press Herald

Study tracks great white sharks off Maine coast

A UNE professor joins Massachusetts researchers in examining patterns of a population likely to proliferate in the Gulf of Maine.

July 31, 2017 — Marine biologists are embarking on the first study dedicated to learning about the habits of great white sharks off the coast of southern Maine, where the scientists say the fishes’ population is likely to increase.

University of New England professor James Sulikowski will collaborate with Greg Skomal of the Massachusetts Division of Marine Fisheries to see how often the sharks come near the coast.

Great white sharks are the world’s largest predatory fish. Known for their powerful jaws and serrated teeth, they can grow to more than 20 feet and 4,000 pounds.

They have been protected from harvesting in U.S. waters since 1991. Skomal said the shark population has been rebounding since.

“We definitely believe the entire East Coast population is increasing and that we are likely to see white sharks in the Gulf of Maine increasing,” he said.

Read the full story at the Portland Press Herald

Federal Scientists, Fishermen Question Shark Fin Ban

July 27, 2017 — The following is an excerpt from a report, by Jim Strickland of WSB-TV in Atlanta, about a new bill, co-sponsored by Georgia Congressmen David Scott and Buddy Carter, that would outlaw the sale of all shark fins, including legally caught ones, in the United States:

The new bill, which would create the Shark Fin Trade Elimination Act, has stirred a fight over whether dealing in shark fins should be made illegal.

Videos of “finning,” where foreign fishing fleets cut the fins off live sharks then throw the fish back to slowly die, pepper YouTube.

“You shouldn’t do it and that’s all there is to it. Not to mention it’s cruel,” said licensed Georgia shark fisherman Charlie Phillips. As vice chair of the South Atlantic Fishery Management Council, Phillips advises the government on seafood policy.

Finning live sharks has been outlawed in the U.S. since 2000. Here, fins must be harvested on land, after the fish is caught and killed at sea. Violators risk fines and banishment from the industry.

“I don’t let anyone do anything illegal on my boat,” said commercial shark fisherman Dave Campo.

“They’re impacting the American fisherman for what may be happening in other places, that we’ll never control,” Campo said.

It’s not just the fishermen saying so. So does the director of the nation’s official shark research lab, Dr. Bob Hueter of Mote Marine Laboratory in Sarasota.

“They’ll have to throw the fins in the dumpsters which is wasteful and it doesn’t make any sense for the fishery,” Dr. Hueter said.

According to Dr. Hueter, a ban will wipe out responsible shark fishing here, while countries that still allow live finning will fill the void.

“By doing this we’re essentially punishing the wrong people,” Dr. Hueter told Strickland.

Read and watch the full story at WSB-TV

Will banning trade in fins help endangered sharks? Experts are divided

July 21, 2017 — Dave Ebert pulls up an image on his computer screen. The object in the picture is shaped like an oversize arrowhead, thin, yellowish, and fraying at its edges. It’s a dried shark fin, the key ingredient in the Chinese delicacy shark fin soup. Border officials confiscated it from someone entering the U.S.

The U.S. Fish and Wildlife Service (FWS) Office of Law Enforcement in Burlingame, California, sent the image to Ebert to identify exactly what species of shark the fin came from. If Ebert determines that it belonged to a species listed under the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), an agreement to ensure that international trade of certain species doesn’t threaten their survival, the FWS will consider law enforcement action against the fin’s owner.

Ebert knows how hard it is to police this international trade, in hopes that fins that end up in restaurant kitchens have been sustainably fished. Yet he and many other shark conservation experts are skeptical about a bill before Congress, called the Shark Fin Sales Elimination Act of 2017. Congressmen Ed Royce (a Republican from California) and Gregorio Kilili Camacho Sablan (an Independent from the Northern Mariana Islands) introduced the bill on March 9.

If the Shark Fin Sales Elimination Act passes, it would terminate the possession and trade of shark fins in all 50 U.S. states and 16 territories. Already 11 states, including California, and three territories have bans in place.

Activists and advocacy groups often cheer these bans. However, many experts say that they are not the best way to help overfished shark populations recover or to stop finning-at-sea, a practice where fishers cut off a shark’s fins and throw the rest of its body overboard, often still alive but doomed. Instead, experts argue that better tracking to determine whether fins come from a stable population and whether the sharks were finned or caught whole, followed by trade restrictions on unsustainably caught fins, represent the best steps toward saving threatened shark species. Some go so far as to argue that a U.S. trade ban may do more harm than good, by crushing a domestic industry that exports sustainably caught fins to markets in Asia and allowing less-sustainable fisheries to take up the slack.

In February 2016, the journal Conservation Biology published a study reporting survey responses from 102 shark researchers from the U.S., Australia, New Zealand, and Great Britain. The survey asked whether the researchers supported a range of 11 different international policies, including fishing quotas, bans on finning-at-sea, listing species on CITES, and banning the trade in shark fins. Banning the fin trade, though supported by about 60 percent of the researchers, was the second least-popular option. By contrast, more than 90 percent backed the idea of sustainable fishing using strict catch quotas, the most popular choice.

“Full utilization of sharks taken in sustainable fisheries would logically require that some of the fins get used,” one of the scientists wrote in the survey. Another added: “A nationwide ban on shark fishing is unwarranted. There are populations that are capable of supporting a sustainable fishery.”

U.S. shark fisheries are already heavily regulated to protect species that, as top predators, are vital to the health of marine ecosystems. In 1993, the federal government started limiting the species and number of sharks caught. Since then, regulations have become more stringent. In 2000, officials banned shark finning in U.S. waters due to ethical and environmental concerns. Sharks are typically slow to mature and produce few offspring, making it hard to know whether the regulations have helped. However, recently some coastal shark populations have shown signs of recovery. A study published in the journal Fish and Fisheries in February found that most formerly over-exploited shark species along the U.S. east coast and in the Gulf of Mexico were on the rise, following the implementation of careful management in the 1990s.

Read the full story at Mongabay

NEW JERSEY: Did a fishing crew catch the biggest shark in state history?

July 22, 2017 — A fishing boat named the Jenny Lee caught a 926-pound Mako shark Saturday morning and it could be the largest shark catch in New Jersey history.

The crew was fishing 100 miles off of the coast of New Jersey in an area known as Hudson Canyon. It took the crew a little over an hour to reel in the shark and hour and a half to get him into the boat, Kevin Gerrity, captain of the Jenny Lee, said.

“It’s a pretty awesome feeling,” Gerrity said. “We saw him swimming up to the boat. We didn’t think we were going to get him but we got him.”

“We were able to get him with a skipjack fillet with a squid combo as his last meal,” Gerrity added jokingly.

Read the full story at NJ.com

Retention Limit of Aggregated Large Coastal Shark and Hammerhead Shark Management Groups Increased to 36 Sharks per Trip Effective July 16th

July 17, 2017 — The following was released by the Atlantic States Marine Fisheries Commission:

The National Marine Fisheries Service (NMFS) has increased the retention limit for the commercial aggregated large coastal shark (LCS) and hammerhead shark management groups (Appendix 1) for directed shark limited access permit holders in the Atlantic region from 3 to 36 LCS (other than sandbar sharks) per vessel per trip effective July 16, 2017. The revised retention limit will remain in effect for the rest of the 2017 fishing season or until NMFS announces another adjustment to the retention limit.

This action is intended to promote equitable fishing opportunities in the region, while allowing quota to be harvested throughout the year. All other retention limits and shark fisheries remain unchanged in the Atlantic region.

As agreed upon by the Commission’s Coastal Sharks Management Board, the Commission will follow NMFS for in-season changes to the commercial retention limit. Therefore, no more than 36 LCS other than sandbar sharks per vessel per trip may be retained from the aggregated LCS and hammerhead management groups by a state licensed fishermen effective July 16, 2017.

The Federal Register commercial retention limit notification can be found at: http://www.nmfs.noaa.gov/sfa/hms/species/sharks/news/shark_news_2017.html.

Shark landings can be found at: http://www.nmfs.noaa.gov/sfa/hms/species/sharks/Landings/index.html.

Please contact Kirby Rootes-Murdy, Senior Fishery Management Plan Coordinator, at (703) 842-0740 or krootes-murdy@asmfc.org if you have questions.

A PDF of the announcement can be found here.

International Seafood Sustainability Foundation Releases Behind-the-Scenes Video of Bycatch Mitigation Tests on Silky Sharks in Honor of Shark Awareness Day

Tuna fisheries conservation group shares dynamic footage of scientists testing a method to save sharks incidentally caught in a tuna purse seine net

July 14, 2017 — WASHINGTON — The following was released by the International Seafood Sustainability Foundation:

In honor of Shark Awareness Day 2017, the International Seafood Sustainability Foundation (ISSF) has released a new video that shows ISSF scientists testing a method to save sharks incidentally caught in a tuna purse seine net. ISSF has a history of testing best practices for bycatch mitigation and sharing these findings through scientific reports, info-graphics and now video. The findings of this particular video were encouraging, with electronic tag data showing that 100 percent of tagged sharks survived past 21 days post-release. ISSF believes this could be a relatively simple way for fishers to prevent sharks from becoming entangled when they’re caught in nets, and to free them quickly without harm.

Watch the video here: https://www.youtube.com/watch?v=I02yHtnSrDE