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Sturgeon

An Idaho study of sturgeon in Hells Canyon determined a significant portion of the long-lived fish have hooks and other fishing tackle in their digestive tracts, but they seem to be able to process and pass the metal without harm.

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HELENA — A judge on Wednesday blocked construction of a $59 million irrigation dam because of the potential threat to an ancient fish species in Montana's Yellowstone River just three months after he lifted a previous injunction on the project.

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