Sharks determine their directions through the Earth’s magnetic field


Washington – AFP
A recent scientific study concluded that sharks are able to monitor the Earth’s magnetic field, similar to the Global Positioning System (GPS), to determine the path to behave.
The research, published Thursday in the Journal of Current Biology, confirms a decades-old theory of how marine predators migrate over long distances and swim in straight lines and then return to their starting point, Brian Keeler, the study’s lead supervisor, told AFP.
Scientists believe that sharks, like sea turtles and some other species, are able to determine their location and destination using the Earth’s magnetic field. But there was no way to prove it.
Therefore, Brian Keeler, a project leader at Save Our Seas (Save Our Seas) in Florida, decided to conduct studies on a small species of hammerhead sharks from the Gulf of Mexico.
Keeler, who is also a specialist in ocean biology at Florida State University, noted that these fish “return to the same site every year,” and this “shows that sharks know + their home + and can return to it from far away points.”
His team collected twenty small sharks and later exposed them to a tool used to simulate the magnetic field returning to several places around the world.
As expected, the sharks headed north when conditions simulated a site in the south they had caught. The fish did not move in any direction when they were placed in conditions mimicking those in their traditional environment.
And Brian Keeler ruled out that these sharks were the only ones to have developed such an ability. He pointed out that great white sharks, for example, migrate from South Africa to Australia and return to the same place in South Africa annually.
This journey extends over twenty thousand kilometers within nine months, for an animal adopting a “very straight path”. In the future, the researcher wants to study the impact of human structures, such as undersea wires, on sharks.


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