Grand Canyon trout removal helps native fish populations rise over 400%
A multi-year conservation project in the Grand Canyon has successfully increased native fish populations by over 400% by removing non-native trout. The initiative focused on protecting the endangered humpback chub by suppressing predator populations and translocating fish to safer habitats.
Why it matters
This project demonstrates the effectiveness of active ecosystem management in restoring biodiversity and protecting endangered species from human-induced habitat changes.
At least five of the Grand Canyon's eight species of native fish were historically found in Bright Angel Creek. However, these species that are uniquely adapted to the characteristics of the Colorado River and its tributaries have suffered serious declines over the years due to human-caused changes to their habitat. The creek once supported a large number of native fish, including the endangered humpback chub. Humpback chub were first scientifically described from specimens collected in or near Bright Angel Creek. But over the years, it became the main spawning site for non-native brown trout, which are predators of the native population.In 2006, the National Park Service began a multi-year project to reduce the number of non-native brown and rainbow trout to benefit the native fish population.
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