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For nearly 15 years, Idaho Fish and Game has encouraged anglers to kill trout. Ads have been placed. Limits have been eliminated. And, most interesting, cash prizes have been offered.
All so that rainbow trout can be killed as efficiently as possible in the South Fork Snake River.
Of course, the reason behind the initiative (“rainbow trout suppression”) are virtuous. After decades of stocking nonnative rainbows on top of cutthroats, Idaho is taking action. The South Fork Snake River has a remarkable carrying capacity for cold water fish. But because rainbows and cutthroat trout are so similar, their ecological niches overlay. As a result, the native cutthroats are unable to thrive. Furthermore, their genetic similarities allow for crossbreeding. “Cutbows” are fine for fighting and eating, but they are a real thread in watersheds that represent historic populations of either parent species.
Around 2010, Idaho Fish and Game decided to take action.