Tag: "shark" at biology news

Mimicking humpback whale flippers may improve airplane wing design

...rey. According to Fish, the scalloped hammerhead shark is the only other marine animal with a similar aerodynamic design. The expanded hammerhead shark head may act like a wing. The trick now is to figure out how to incorporate the advantage of the tu...

Scripps scientists look deep inside sharks and their high-performance swimming system

...erver, it would appear that the mighty great white shark and the common tuna don't have a lot in common. In... found that lamnid sharks have diverged from their shark ancestors in the mechanical design of their swimming apparatus, just as tunas diverged from their bo...

Report in BioScience details global decline of nonmarine mollusks

...n amphibian species, more than twice the number of shark and ray species, and nearly seven times the number of turtle species. Furthermore, nonmarine mollusks have the dubious honor of having the highest number of documented extinctions of any major taxonomic group. A staggering 42% of the 693 recor...

Shark guide probes uncharted waters

...pecies, and information about reducing the risk of shark attack. Species-specific experts have reviewed the content for accuracy. ...

Breakthroughs in acoustic tracking shine new light on the lives of fish

...searchers are using acoustic tags to track several shark species, uncovering trends in the movements of the..."We have to understand how the environment affects shark movements in order to define effective protected areas." Tracking results show that as young sharks ...

International science team tracks ocean predators around the globe

...bacore. TOPP researchers also are tagging numerous shark species including white, mako, blue and salmon sharks that range from Alaska to Baja California. These fishes cross the largest ocean on Earth to move from one feeding area back to a breeding region. How and when such migrations occur has been a my...

Declining sharks

...on in the Gulf of Mexico in the 1950s, the pelagic shark assemblage has declined by over 80%, and the oceanic whitetip shark, initially the most common species, by over 99%. Remarkably, there is no conservation attention focused on this species. Rather it is all but forgotten in the Gulf of Mexico, with no...

UF study: World shark attacks sink again, may signal long-term trend

GAINESVILLE, Fla. --- The number of shark attacks worldwide took a dip for the third straigh...oversees the file, the world's largest database of shark attacks. More important, he said, the overall fatality rate continues to be lower than in the pas...

Taming Jaws: Scientists lift great white sharks from ocean to fit with satellite tags

...g to the scientists, the technique is safe to both shark and researcher, resulting in better data to unders...al fin to record the fish's movements. Before the shark is released, it is given a cocktail of medicine to ensure rapid recovery. "We have gone to incredib...

Startling deep-sea encounter with rare, massive Greenland shark

...ling equipment, though no harm was done. After the shark swam away from the submersible Askew followed it f...fter ramming into HARBOR BRANCH's submersible, the shark continued to swim slowly. Greenland sharks also eat seals, dead whales, and other animals, including...

Fishing for photos of rare or unknown deep-sea creatures with an electronic jellyfish lure

...teractions, such as a primitive hagfish annoying a shark (photo available). Widder now plans to take the deep-sea observation work one step further by deploying the camera system along with a simple electronic device designed to mimic the various bioluminescent light patterns given off by jellyfish known a...

White shark attack shows they're not man-eaters

...rities said she had bled to death. "Certainly that shark could have consumed her if it had wanted to. But i...ific studies of white, hammerhead, nurse and other shark species' behavior are described in lay language in his entertaining new book, "The Secret Life of Sh...

Extraordinary Number of unique species discovered in Caribbean

...on." Toadfishes, silversides and the dwarf lantern shark the world's smallest shark, reaching only 21 centimeters are among the unique micro-endemic species that are highly susceptible to human activity in the Caribbean. Destructive fishing practices, the dredging of harbors and estuaries, and the layin...

Waiter, there's a shark in my soup

...eth and jaws for trophies and even eat its fins in shark fin soup. Today however, great whites received so...n when only dried fins or meat are available. The shark fin trade in particular has put sharks under increased fishing pressure, depleting populations of ma...

The Year of Biodiversity and Conservation

...Laboratory, studies the genetic diversity of lemon shark populations in Brazil, the Bahamas, and the Florida Keys helping to shape a conservation plan for this over-fished coastal shark. Research on the evolutionary relationships between all species living and extinct helps scientists understand the ori...

Fish is not always 'brain food'

...ethylmercury is diet, particularly large fish like shark and swordfish. The authors of this new research concluded: "methylmercury exposure at levels often encountered by adults in North America may be inducing adverse effects on neurobehavioral performance." Methylmercury damages or destroys nerve tissue....

Exploring the sights and sounds of a deepwater coral marine protected area off Florida

...acks, tuna, giant sunfish, manta rays, and several shark species. The Banks' location at the southern end of the South Atlantic Bight (ocean between Cape Canveral and Cape Hatteras), directly under the Gulf Stream, makes it a potentially important source of fish larvae for the entire southeast U.S. contine...

Shark fin trade greater than previously thought, study finds

...ervation Society (WCS) revealed that the number of shark fins moving through Asian markets could be more th...ajor discrepancies between the reported numbers of shark fins (a major delicacy in Asian cuisine) in Hong Kong and its key trading partners, particularly mai...

World shark attacks sink for second year in row, UF research shows

...and excessive fishing may have taken a bite out of shark attacks, which declined in 2002 for the second str...nd the third took place in Brazil. "The number of shark attacks has declined for the last two years at all three levels, internationally, nationally and in ...

Fluid flow technology takes a cue from fast-swimming sharks

... along a shark's body from head to tail help the shark swim faster. But very fast-swimming sharks, such as the silky shark and blue shark, also have special arrangements of riblets, the function of ...

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