Trout, Rainbow Some problems with farming this species exist. Feed for Rainbow Trout contains relatively large amounts of fishmeal and fish oil. Most Rainbow Trout farms in the U.S. use freshwater flow-through systems and discharge partially treated water into nearby waters. Rainbow Trout are native to the Pacific Northwest where the majority of U.S. farms are located.
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Trout, Steelhead Sea-going members of the Rainbow Trout species, Steelhead return to natal hatching grounds to spawn, with a small percentage surviving to reproduce more than once. Wild Steelhead populations have declined significantly due to overfishing and habitat loss. Commercial fishing for Steelhead in the U.S. has been restricted to Native American tribes for decades. Hatcheries supply the majority of the Steelhead these fishers catch.
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