Monday August 21, 2023

Nature World News

The National Park Service announced Friday that it would redouble its attempts to kill invasive fish with a chemical treatment in a section of the Colorado River in northern Arizona.

Rotenone, a drug that is fatal to fish but has been authorized by federal environmental inspectors, will be released starting on August 26.

It’s the most recent move in an ongoing battle to safeguard a threatened native fish, the humpback chub, and keep non-native smallmouth bass as well as green sunfish away below the Glen Canyon Dam.

The Colorado River slough, a cobble bar region surrounding the backwaters where the smallmouth bass was discovered, and a little length up and downstream will need to be closed during the course of the weekend as part of the treatment.

Last year, chemical compounds were also used.

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