Hatcheries May Be Wrecking Fishes’ Sense of Direction | Science | WIRED

See on Scoop.itEarth Changes

Salmon and ocean-going trout are famous for their ability to return to the streams of their birth after years at sea. Growing evidence suggests the fish use the earth’s magnetic field to find their way home. That could be a problem for fish raised in hatcheries, according to a new study. It finds that common construction materials like iron and steel can throw off the fishes’ navigation.

See on www.wired.com

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