Hatchery steelhead trout less successful spawning in wild

Steelhead trout grown in hatcheries lose their ability to produce offspring in the wild, raising concerns about whether captive breeding programs can help save endangered fish, a new study concludes. Scientists at Oregon State University found that even when hatcheries breed fish captured in the wild, their offspring become less and less successful at reproducing in the wild than their cousins that never left the river.  LINK