Pacific salmon migrate with a ‘magnetic map’

Leaping Salmon 3There is more evidence that salmon use the Earth’s magnetic field to perform extraordinary feats of navigation.

A study suggests that Pacific salmon are born with an in-built “magnetic map” that helps them to migrate over thousands of kilometres.

US researchers believe the fish are sensing changes in the intensity and angle of the Earth’s magnetic field to establish their position in the ocean.

The study is published in the journal Current Biology.

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