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A Downside to Captive Breeding (1 of 2)

Caption: A hatchery-born steelhead trout waiting for spawning in the South Santiam Hatchery in Oregon. This male had a three-year journey between the ocean and the river before returning to the hatchery where he was reared. He will be used for reproduction of the next generation of hatchery fish. This image relates to an article that appeared in the Oct. 5, 2007, issue of the journal Science, published by AAAS. The study, by Dr. Hitoshi Araki and colleagues at Oregon State University in Corvallis, Ore., was titled "Genetic Effects of Captive Breeding Cause a Rapid, Cumulative Fitness Decline in the Wild."

Credit: Image courtesy of Hitoshi Araki

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