View Related Episode: Non-Lethal Predator Control, Cutthroat Trout, Green Power Resurgence
Scientists don't know why some cutthroat trout remain in their native streams, while others head out to sea, then return home to spawn. They also don't know why the ocean-going cutthroats have been failing to return in recent years. Biologists fit the trout with radio tags to find out.
First Broadcast: 2004
Producer: Jim Newman
Appeared in episode: Non-Lethal Predator Control, Cutthroat Trout, Green Power Resurgence
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