Study: Hatcheries can disrupt steelhead navigation

June 3, 2014 11:18 PM

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GRANTS PASS, Ore. (AP) — A new study suggests that steelhead trout can have trouble using the Earth's magnetic field to navigate if they were raised in a hatchery, where the field can be distorted by iron pipes.

Scientists at the Oregon Hatchery Research Center in Alsea raised two sets of fish: one outside the hatchery with a natural magnetic field, and one inside the hatchery, where instruments showed the field was distorted.

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