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Displaying items by tag: sharks

Researchers find North Atlantic great whites spend their first 20 years in the waters off Montauk, Long Island.

After several decades of decline, great white sharks in the North Atlantic are finally on the rise. That’s great news for ecosystem health, even if it freaks out beach goers. But scientists still know little about the migratory patterns of young sharks, which is a challenge for conservationists.

Now, a group of researchers think they’ve located a shark “nursery”—the first found in the North Atlantic.

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New radiocarbon dating of eye lenses suggests life span up to 392 years.

The latest in birthday science proposes that the vertebrate with the longest life span yet measured is the mysterious Greenland shark.

Dating based on forms of carbon found in sharks’ eye lenses suggests that a large female Somniosus microcephalus was about 392 years old (give or take 120 years) when she died, says marine biologist Julius Nielsen of University of Copenhagen.

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Every winter, the population of great white sharks (Carcharodon carcharias) that roams and feeds along the coastline from Central to Baja California disappears deep into the Pacific Ocean—swimming for 30 to 40 days to reach a point approximately halfway between Mexico and Hawaii.

There’s not a lot going for this particular spot in the ocean. It’s about 3000–5000 meters deep, and pretty barren as far as foodstuffs go. But the massive sharks—which can reach lengths of nearly 22 feet—stay there from about April to July, clustered in an area smaller than Panama.

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Belgium-sized area around northern islands of Darwin and Wolf will be off-limits for fishing in bid to conserve sharks and unique habitat.

Ecuador has created a new marine sanctuary in the Galápagos Islands that will offer protection to the world’s greatest concentration of sharks. Some 15,000 square miles (38,000 sq km) of the waters around Darwin and Wolf - the most northern islands - will be made off limits to all fishing to conserve the sharks that congregate there and the ecosystem on which they rely.

Published in News
Wednesday, 24 February 2016 15:40

Countries Agree On Actions to Protect Sharks

Close to 40 governments agreed this week to enhance protection for additional migratory shark and ray species and to a set of new conservation priorities.

At the Second Meeting of the Signatories to the Memorandum of Understanding on the Conservation of Migratory Sharks (Sharks MOU), which ended in Costa Rica's capital Friday, 39 countries and the European Union agreed to grant protection to an additional 22 species of sharks and rays, 'The oceans' top predators help maintain the balance of marine ecosystems.

Ensuring their survival is a global public interest that requires concerted, cooperative action by governments, fisheries, local communities, conservation organizations, scientists and the general public.

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No creature has a reputation more fearsome than the great white shark.

Despite all we’ve learned about them, including how they really don’t have much interest at in all eating us, movies and basic cable documentaries still show them as “machines” that do little more than “swim and eat and make little sharks.” And that’s not to mention the various video games where your goal as a great white is to chomp everything in sight in as little time as possible.

But what do great white sharks really do all day?

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Even though it is 4 metres long, this humpback whale calf was no match for a group of dusky sharks

Species: Dusky shark (Carcharhinus obscurus, pictured below) Habitat: Temperate and subtropical waters worldwide

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When a predator is lurking nearby, holding perfectly still might be a life-saving strategy. But what if the predator can sense electrical signals generated by breathing?

According to new findings published in Proceedings of the Royal Society B, by freezing in place and essentially holding its breath, a cuttlefish can cloak its electrical cues to prevent predation by hungry sharks.

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Trials taking place in New South Wales also include hi-tech drum lines that will hook sharks and allow for them to be quickly tagged and relocated.

Shark-tracking drones are being deployed to protect Australia’s beachgoers following a series of attacks on surfers.

Trials will begin next week as part of a strategy by the New South Wales (NSW) government, which will also see hi-tech drum lines installed to allow sharks to be hooked, tagged and released further out to sea. The drones will feed images with GPS coordinates back to operators looking for sharks, with the first field tests being conducted off Coffs Harbour, about 285 miles (380km) south of Brisbane.

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Cape Town - The white shark population around the South African coastline has such a low level of genetic diversity that it may seriously jeopardizes their capability to survive into the future. This is one of the findings from a major research project on white sharks and their DNA along the South African coastline, conducted by researchers from the evolutionary genomics group in the Department of Botany and Zoology at Stellenbosch University (SU).

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