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Cutthroat trout cross-breeds to survive

from Scientific American

Any Montana angler worth a double-haul cast knows that the iconic state fish, the westslope cutthroat trout, has been crowded out by the non-native rainbow trout, first introduced to these rivers by well-meaning sportsmen in the 1880s. Now those invaders are taking over the cutthroat's gene pool, too. A new study tracks just how rapidly cross-breeding between the two species has accelerated in the past 30 years. It's invasive hybridization driven by climate change, and it could spell extinction for the ruby-throated native fish of the Big Sky state. more


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