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Magnetic map guides salmon home
Date:2/7/2013

del predicting the shifting magnetic field shows exactly that pattern.

The discovery may have practical application for both wild and farmed salmon.

"If you want to predict the distribution of salmon, then having information on their mechanisms of navigation is really important," Putman said, and any distortion to the magnetic field may be a problem.

"The Earth's magnetic field is quite weak compared to the magnetic fields that humans can produce," Putman added. "If, for instance, hatchery fish are incubated in conditions with lots of electrical wires and iron pipes around that distort the magnetic field, then it is conceivable that they might be worse at navigating than their wild counterparts."

That, together with tiny magnetic wires used to tag hatchery salmon, might explain the high stray rates observed in hatchery-raised fish.


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Contact: Mary Beth OLeary
moleary@cell.com
617-397-2802
Cell Press
Source:Eurekalert  

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