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Sagot :
The discussion of lohmann, k. j. et al. regional magnetic fields as navigational markers for sea turtles science 294, 364–366 is given in below paragraph-
Young loggerhead sea turtles (Caretta caretta) migrate across the North Atlantic Ocean from eastern Florida before making their way back to the North American coast. Here, we report that hatchling loggerhead turtles responded to magnetic fields by swimming in directions that would, in each case, help keep the turtles within the North Atlantic gyre currents and facilitate movement along the migratory pathway. These magnetic fields simulated those found in three widely separated oceanic regions. These findings suggest that juvenile loggerhead turtles have a navigational system whereby local magnetic fields serve as navigational markers and trigger changes in swimming direction at significant geographic borders.
What are magnetic fields?
An electric charge, an electric current, and magnetic materials are all affected magnetically by a magnetic field, which is a vector field. A force perpendicular to the magnetic field and its own velocity acts on a moving charge in a magnetic field. The magnetic field of a permanent magnet attracts or repels other magnets and pulls on ferromagnetic materials like iron. A magnetic field that changes depending on the location will also exert a force on a variety of non-magnetic materials by influencing the mobility of their outer atomic electrons. By using electric currents, like those found in electromagnets, and by altering the electric fields over time, magnetic fields are produced that surround magnetized things.
To learn more about magnetic fields with the help of given link:
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