Reality TV: Camera-toting sharks hunt seals in kelp forests.
Great white sharks fitted with cameras on their dorsal fins have been filmed for the first time stalking prey in dense kelp forests long thought to be no-go zones for the top-level predators.
"The shark drastically increased its activity when it saw the seals, and all sharks raised activity in the presence of kelp," Oliver Jewell, a graduate student at Murdoch University in Western Australia and lead author of a study in Biology Letters, told AFP. Near Dyer island, where Jewell and his colleagues conducted their field research in 2014, this kind of attack appears to occur less frequently.
"We attract the sharks using a line baited with a tuna head or a seal-shaped decoy, and then -- when a shark closes in for a look -- we use a pole to clamp the tag to the dorsal fin," Jewell explained."At times, we would have to spend many hours at sea, perched over the side of a boat to deploy these tags," added Taylor Chapple, a professor at Stanford University and team leader.
More than 28 hours of video data did not record a kill, but it did show one shark closing in on a group of seals darting through the kelp to avoid getting eaten."They are able to make some pretty spectacular 180 degree turns," Jewell said.
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