Hmmm. more bad news on hatchery fish. Obviously more work needs to be done to validate these findings.
A new study suggests steelhead trout can have trouble using the Earth’s magnetic field to navigate if they were raised in a hatchery, where the field may be distorted by iron pipes. Scientists at the Oregon Hatchery Research Center raised two sets of fish: one outside the hatchery with a natural magnetic field, and one inside the hatchery where the field was distorted. Fish raised outside the hatchery oriented themselves to changes in the magnetic field, but fish raised in the hatchery’s distorted magnetic field did not. (Associated Press)
http://kplu.org/post/study-hatcheries-can-disrupt-steelhead-navigation
Filed under: Puget Sound | Tagged: fish hatcheries, hatcheries, Puget Sound, Salmon, steelhead |
