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Sharks Use Earth s Magnetic Field Like GPS to Navigate Oceans Sharks use their electrosensory organs to read the Earth’s magnetic field like a map By Edited by Gadgets 360 Newsdesk | Updated: 10 May 2021 14:41 IST Photo Credit: SciTechDaily Highlights The researchers used different magnetic fields The bonnetheads didn t elicit much response to the magnetic fields How do sharks navigate through the deep, dark world under the seas? Scientists now say they have the very first evidence which shows that sharks use Earth s magnetic fields like a GPS to move across seas and oceans. There are no “street lights” or physical barriers to guide them during their long-distance voyages and migrations. Yet they appear to identify and reach their destinations thousands of kilometres away with precision. Saying that navigating through a three-dimensional ocean is one of the most impressive feats of evolution, the researchers said ....
Sharks use the Earth s magnetic field to navigate the world s oceans, a new study has found. How sharks navigate thousands of miles to return to the same breeding ground every year has mystified scientists for 50 years, with experiments difficult to run. But a study on juvenile bonnetheads found the fish are sensitive to alterations in the planet s magnetic field and use it as a form of GPS. Scroll down for video Sharks use the Earth s magnetic field to navigate the world s oceans, a new study has found. Pictured, the study design with wild bonnetheads This image shows Bryan Keller of Florida State University holding a bonnethead shark. Twenty of these sharks were used in the study ....
E-Mail IMAGE: Locations of the Bahamas and Miami study areas in relation to the paths of Hurricane Matthew (a, path of eye as dot-dash line) and Hurricane Irma (a, path of eye. view more Credit: Figure from Gutowsky et al. (2021 Tiger shark: Neil Hammerschlag Ph.D., University of Miami Rosenstiel School of Marine and Atmospheric Science MIAMI A new study led by scientists at the University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science tracked large sharks in Miami and The Bahamas to understand how these migratory animals respond to major storms, like hurricanes. The researchers analyzed acoustic tag data from tiger sharks (Galeocerdo cuvier), bull sharks (Carcharhinus leucas), nurse sharks (Ginglymostoma cirratum), and great hammerheads (Sphyrna mokarran) before, during, and after Hurricane Matthew in 2016 and Hurricane Irma in 2017. They found that they behaved differently by species and location. ....
Loading video. VIDEO: This video is footage from an experimental trial, where the bonnethead s swimming behavior is affected by the magnetic field it is experiencing. view more Credit: Bryan Keller Sea turtles are known for relying on magnetic signatures to find their way across thousands of miles to the very beaches where they hatched. Now, researchers reporting in the journal Current Biology on May 6 have some of the first solid evidence that sharks also rely on magnetic fields for their long-distance forays across the sea. It had been unresolved how sharks managed to successfully navigate during migration to targeted locations, said Save Our Seas Foundation project leader Bryan Keller, also of Florida State University Coastal and Marine Laboratory. This research supports the theory that they use the earth s magnetic field to help them find their way; it s nature s GPS. ....