Two young coho salmon swim from freshwater to saltwater for the first time. One was born in the wild; the other was born in a hatchery and released into the same river. The wild-born salmon is more ...

Fishing is known to reduce fish populations and change the size and age of fish found in the wild. But a new study suggests that the effects may go much beyond.Researchers have found that heavy ...

Salmon born in captivity become domesticated in as little as one generation, a new study finds, explaining why hatchery-born fish don't do as well as wild-born ones in Oregon rivers. Researchers ...

Steelhead trout that are originally bred in hatcheries are so genetically impaired that, even if they survive and reproduce in the wild, their offspring will also be significantly less successful at ...