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Results tagged “sharks” from NatGeo News Watch

Maldives has created three new marine protected areas, including important feeding grounds for manta rays and whale sharks.

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Photo by Thomas P. Peschak/Save Our Seas Foundation

The Indian Ocean archipelago country is famous as a destination for tourists seeking exotic island getaways. But it is also one of the planet's most important hotspots for many species, including whale sharks and manta rays, two of the largest and most charismatic fish.

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The manta rays of the Maldives are featured in the July 2009 issue of National Geographic Magazine.

At least 120 individual whale sharks, the world's largest fish, live in the ocean around the Maldives. The country is one of the few places in the world where whale sharks can be encountered all year round.

Mohamed Aslam, the Environment Minister of the Maldives, announced the protection of coral reefs and waters in and around Baa atoll Hanifaru, Baa atoll An'gafaru and South Ari atoll Maamigili to commemorate World Oceans Day on June 8.

Maldives image by NASA/ GSFC/METI/ERSDAC/JAROS, and U.S./ Japan ASTER Science Team

"The government is committed to protecting and preserving the Maldives' exceptional biodiversity," Aslam said in a statement announcing the proclamation.

"The marine environment is the bedrock of our economy, supporting our largest industries, tourism and fisheries.

"Not only will this initiative protect whale sharks and manta rays, but also other important megafauna, including reef sharks.

"The marine protected area sites are globally significant. By protecting them we are helping to protect manta rays and sharks throughout the Maldives."

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Photo by Thomas P. Peschak/Save Our Seas Foundation

Apart from restrictions on fishing, the marine protected areas will permit diving and snorkeling only under strict guidelines. Speed limits will be imposed on boats to prevent lacerations to the giant fish from boat hulls and propellers, and waste management programs will be run on local islands to prevent pollution.

The initiative is spearheaded by the government, the Maldives Whale Shark Research Programme and the communities of Baa atoll and South Ari atoll, according to the Maldives Environment Ministry.

Maldives-marine-protection-area-map.jpgNGS illustration of Hanifaru by Caitlin Sargent

The new protected areas are "one of the last places on the planet where rays and whale sharks still roam in numbers reminiscent of times gone by," said Save Our Seas Foundation (SOSF) Marine Biologist Guy Stevens, who has been doing manta ray research in the Maldives for the past five years. The National Geographic article "Feeding Frenzy" covers the work of Stevens and features photographs by SOSF chief photographer Thomas Peschak.

See photographs by Thomas P. Peschak of manta rays as they converge to feed in a spectacular coral-reef ballet:
Mantas in the Maldives >>

"Each year between May and November the tide works its magic to suck krill and other plankton into Hanifaru Bay," SOSF said in a separate statement about the new marine protected areas (MPAs). "The tiny creatures then become trapped and form an irresistibly thick soup. This delightful offering attracts manta rays from all over the Maldives and they converge here to feed in the hundreds."

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Photo by Thomas P. Peschak/Save Our Seas Foundation

SOSF said the proclamation of waters around Hanifaru in the Baa atoll as a marine protected area (in the map above) was a giant step towards protecting the threatened manta rays. "This and the creation of two other MPAs, An'gafaru in the Baa atoll and Maamigili in the South Ari atoll, demonstrates the new government's forward thinking in marine conservation."

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SOSF is providing a patrol boat for the new marine protected areas.

The marine protected areas are the latest in a series of environmental initiatives by President Mohamed Nasheed's administration, which assumed office after the country's first multiparty presidential election by popular vote, in November last year.

"President Nasheed deserves much praise for his push to protect these ecologically valuable marine areas in the Indian Ocean," said SOSF Director Chris Clarke. "His action protects one of the world's most vital populations of manta rays by prohibiting all forms of commercial fishing, only permitting traditional bait-fishing by local fishermen."

Earlier this year Maldives banned reef shark hunting, and Nasheed announced in March that the Maldives will become the world's first carbon-neutral country by 2020.

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Photo by Thomas P. Peschak/Save Our Seas Foundation

Hammerhead sharks and giant devil rays are becoming globally edangered, largely because of serious overfishing driven by the voracious human appetite for shark fin soup and other seafood, a comprehensive survey by experts from 90 countries has determined. Many other sharks and rays--one third of all their species--are also in trouble.

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NGS illustration by Shawn Gould

The first study to determine the global conservation status of 64 species of open ocean (pelagic) sharks and rays reveals that 32 percent are threatened with extinction, primarily due to overfishing, according to the International Union for Conservation of Nature (IUCN) Shark Specialist Group.

The percentage of open ocean shark species threatened with extinction is higher for the sharks taken in high-seas fisheries (52 percent), than for the group as a whole, the organization said in a news statement today.

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"Despite mounting threats, sharks remain virtually unprotected on the high seas," said Sonja Fordham, deputy chair of the IUCN Shark Specialist Group and policy director for the Shark Alliance.

"The vulnerability and lengthy migrations of most open ocean sharks call for coordinated, international conservation plans. Our report documents serious overfishing of these species, in national and international waters, and demonstrates a clear need for immediate action on a global scale."

The report was released ahead of an international gathering next week in Spain of managers responsible for high-seas tuna fisheries in which sharks are taken without limit. It also coincides with an international group of scientists meeting in Denmark to formulate management advice for Atlantic porbeagle sharks.

A shark head is left behind by an Uruguayan fisherman.

NGS photo by Bruce Dale

IUCN experts classify great hammerhead (Sphyrna mokarran) and scalloped hammerhead (Sphyrna lewini) sharks, as well as giant devil rays (Mobula mobular), as globally Endangered, the statement said.

Smooth hammerheads (Sphyrna zygaena), great white (Carcharodon carcharias), basking (Cetorhinus maximus) and oceanic whitetip (Carcharhinus longimanus) sharks are classed as globally Vulnerable to extinction, along with two species of makos (Isurus spp.) and three species of threshers (Alopias spp.).

Porbeagle sharks (Lamna nasus) are classified as globally Vulnerable, but Critically Endangered and Endangered in the Northeast and Northwest Atlantic, respectively.

The blue shark (Prionace glauca), "the world's most abundant and heavily fished open ocean shark," is classified as Near Threatened.

"Species are increasingly targeted due to new markets for shark meat and high demand for their valuable fins."

"Many open ocean sharks are taken mainly in high-seas tuna and swordfish fisheries," IUCN said. "Once considered only incidental 'bycatch,' these species are increasingly targeted due to new markets for shark meat and high demand for their valuable fins, used in the Asian delicacy shark fin soup. To source this demand, the fins are often cut off sharks and the rest of the body is thrown back in the water, a process known as 'finning.'

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"Finning bans have been adopted for most international waters, but lenient enforcement standards hamper their effectiveness."

Sharks are particularly sensitive to overfishing due to their tendency to take many years to mature and have relatively few young, IUCN continued.

"In most cases, pelagic shark catches are unregulated or unsustainable. Twenty-four percent of the species examined are categorized as Near Threatened, while information is insufficient to assess another 25 percent."

NOAA Office of Law Enforcement agent counting shark fins.
Photo courtesy NOAA

Fifteen experts from government agencies, universities, non-governmental organizations, and institutions around the world took part in the preparation of the report.

The IUCN Shark Specialist Group called on governments to set catch limits for sharks and rays based on scientific advice and the precautionary approach.

iucn LOGO.jpgFull Protection Urged

"It further urges governments to fully protect Critically Endangered and Endangered species of sharks and rays, ensure an end to shark finning and improve the monitoring of fisheries taking sharks and rays.

"Governments should invest in shark and ray research and population assessment, minimize incidental bycatch of sharks and rays, employ wildlife treaties to complement fisheries management and facilitate cooperation among countries to conserve shared populations," according to the group.

This week scientists from the International Council for Exploration of the Sea (ICES) and the International Commission for the Conservation of Atlantic Tunas (ICCAT) are meeting in Copenhagen to assess all Atlantic porbeagle populations and formulate recommendations for fishery managers.

Next week, San Sebastian, Spain will be the site of the second Joint Meeting of the five Regional Fishery Management Organizations (RFMOs) for tuna.

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IUCN is the world's oldest and largest global environmental organization, with more than 1,000 government and NGO members and almost 11,000 volunteer experts in some 160 countries.

Photo courtesy NOAA

The IUCN Shark Specialist Group (SSG) is a network of 180 experts from 90 countries who are involved in research, fisheries management, marine conservation or policy development and implementation for chondrichthyan fishes (sharks and their relatives; the skates, rays and chimaeras).

The group's mission is to promote the long-term conservation of these species, effective management of their fisheries and habitats and, where necessary, the recovery of their populations.

The IUCN Red List of Threatened Species is the most comprehensive conservation inventory of the world's plant and animal species and a widely used tool for focusing attention on species of conservation concern. The assessments evaluate the conservation status of individual species, identify threatening processes affecting them and, if necessary, propose recovery objectives for their populations.

Sexy Beasts: Valentine's Day Gone Wild

Posted on February 13, 2009 | 0 Comments

The birds and the bees don't celebrate Valentine's Day, of course, but some certainly have bizarre mating rituals.

Some of the stories National Geographic News published about this over the years included pandas watching porn, damselfly mating games that turn males gay, spiders that glow with fluorescence in the presence of potential mates, gorillas mating in the missionary position, and a video of wild sharks mating. Read on ...

 

1. Panda "Porn" to Boost Mating Efforts at Thai Zoo

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A Thai zoo hoped that "panda pornography" would spark romance between its two giant pandas, which were married by proxy in an elaborate Chinese-style ceremony, we reported in November 2006.

NGS stock photo by Michael Nichols

Chuang Chuang and Lin Hui had called Thailand's Chiang Mai Zoo home for the past four years. Zoo officials hoped that the warm Thai climate would spark the pandas' hormones and trigger their desire to mate, our contributor Brian Handwerk wrote.

"But the animals, on loan from China for ten years, have yet to start a family. A first mating attempt earlier this year failed to produce offspring, and the pandas have remained platonic pals since then -- prompting officials to launch their unique plan," Handwerk reported.

"They don't know how to mate, so we need to show the male how through videos," project chief Prasertsak Buntrakoonpoontawee told the Reuters news service.

Chuang Chuang, the six-year-old male, was to view films of other mating pandas when scientists judged him to be relaxed and receptive -- perhaps just after a tasty dinner.

"If all goes well, the racy video will be both instructional and inspirational, showing Chuang Chuang the reproductive ropes and causing him to see five-year-old Lin Hui in an entirely different light," our report said.

Did it work?

After panda porn failed to spark amour, Thai zoo authorities turned to artificial insemination in the hope of impregnating their lone female giant panda, the Associated Press reported a few months later.

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We all know about the size of dinosaurs, of course, but how about a rodent the size of a bull, a sea scorpion bigger than a man, a frog as large as a beach ball, a penguin the size of a small adult human, a 1,000-pound ground-sloth-like marsupial, and a shark that may have grown longer than 50 feet and weighed up to 30 times more than the largest modern great white?

All these titans existed, although not in the same place or period.

Read on for pictures and more about seven of the biggest animals of all time.

1. Biggest Snake Fossil Found in Colombia Coal Mine

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Illustration of Titanoboa cerrejonensis by Jason Bourque/ Released by Nature

The biggest snake that ever lived (that we know about) was a massive anaconda-like beast that slithered through steamy tropical rainforests about 60 million years ago feasting on primitive crocodiles, National Geographic News reported today.

"Fossils discovered in northeastern Colombia's Cerrejon coal mine indicate the reptile was at least 42 feet (13 meters) long and weighed 2,500 pounds (1,135 kilograms)," contributor John Roach reported.

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The snake would have killed its prey by slow suffocation -- wrapping around it and squeezing, just like a modern python or boa. Only this snake was twice the size of today's largest constrictors.

Humans would stand no chance against one of these giant snakes, said Hans-Dieter Sues, paleontologist and associate director for research and collections at the National Museum of Natural History of the Smithsonian Institution in Washington, D.C. "Given the sheer size, the sheer cross section of that snake, it would be probably like one of those devices they use to crush old cars in a junkyard."

 

Precloacal vertebra of an adult Green Anaconda dwarfed by a vertebra of the giant boid snake Titanoboa cerrejonensis (photo credit Kenneth Krysko) and (lower photo) comparison of a vertebra of Titanoboa with the body of a live Python regius (photo credit Jason Head)

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seafood-1.jpgPhoto by James L. Stanfield/NGS

For Enric Sala, saving the oceans is personal.

By personal he doesn't mean only himself. He means me, and you, and every one of our six billion fellow humans.

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"If we all did something it would be huge," he said at a lunchtime forum at National Geographic headquarters in Washington, D.C., today.

Sala is a marine ecologist and a National Geographic Fellow. His research was used to justify scientifically the proclamation of vast new marine monuments in the Pacific Ocean, announced by President Bush earlier this month.

Photo by James L. Stanfield/NGS

Sala also has been educating National Geographic employees about the consequences of eating certain types of seafood.

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Porbeagle shark Lamna nasus (Global Red List Assessment: Vulnerable;

Sub-population Red List assessment for the Northeast Atlantic: Critically Endangered)

Photo © Steven Campana

Joining the long list of species heading toward extinction are 26 percent of northeast Atlantic sharks, rays and chimaeras, according to an assessment by the International Union for Conservation of Nature.

Another 20 percent are in the Near Threatened category.

"The total number of threatened species may well be higher as there was insufficient information to assess more than a quarter (27 percent) of the species," according to a report released today by the IUCN Shark Specialist Group (SSG).

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Photograph of the newly discovered Australian reticulate swell shark Cephaloscyllium hiscosellum courtesy CSIRO

Marine biologist Sylvia Earle is fond of saying that a teaspoon of ocean water brims with life. She once told me that the sea is full of animals yet to be discovered. That we know less about the ocean floor than we do about the solar system.

I'm mindful of these words whenever we publish news about discoveries in the oceans. Finds seem to be announced almost every week. Some of the most popular stories we have published have been about giant squid or strange new species of fish.

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Human impacts are laying the groundwork for mass extinctions in the oceans on par with vast ecological upheavals of the past, a sea scientist warned this week.

Jeremy Jackson, a professor of oceanography at Scripps Institution of Oceanography at UC San Diego, in the photo on the right, believes that overfishing, pollution, and climate change must be addressed to halt the spiral of the world's oceans into catastrophe.

"Only prompt and wholesale changes will slow or perhaps ultimately reverse the catastrophic problems they are facing," he said in a paper published by the science journal Proceedings of the National Academy of Sciences

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Shark Tales Are Hot Summer Fare

Posted on July 25, 2008 | 1 Comments

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"An image that I had always dreamed of...a white shark in mid-flight coming straight toward me in full battle cry," is how Chris Fallows described this scene in South Africa's coastal waters. His photo is part of the most popular gallery published in the seven-year history of National Geographic News. Now these breaching sharks are back in the news (see the video in the extended entry below).

Photo courtesy Apex Predators,"Home of the breaching great whites"

National Geographic News knows this time of year as the "summer slump." Schools are out and many people are on vacation, so there is a dip in the number of visitors to our site. We look harder for stories we know draw crowds.

So it's this time of year that we and others in the media look to sharks.

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