Posted by: leothegeo | 2014/02/08

Salmons Use Magnetic Fields To Navigate The Oceans

Researchers from Oregon State University have discovered that salmons use Earth’s magnetic fields to navigate the oceans, which you can read in Current Biology.
What was already known was that there was a correlation between salmon migratory patterns and magnetic fields. The researchers at the Oregon Hatchery Research Center wanted to test this theory and observed different magnetic fields’ effects on juvenile Chinook salmon. What they discovered was that the salmons re-oriented themselves, swimming towards the centre of their feeding grounds. This would indicate that magnetic fields is their way to find the way.

Earth’s fields are quite weak and salmons are fairly sensitive to these magnetic fields. If these fields are weak, how are fish perturbed by man made things such as electrical cables?




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