Fishing News
Nonnative fish to be thinned
By the Associated Press
PHOENIX - Some brown and rainbow trout will be removed from the Grand Canyon beginning in January in an effort to protect the native fish on which they have been preying.
Officials will use two approaches to try to thin the populations of nonnative fish by up to 30,000 over two years.
They will vary the water levels in the Colorado River below Glen Canyon Dam, which should disrupt spawning and keep some young fish from surviving to adulthood. But most of the fish will be captured and destroyed.
The removals are part of a two-year experiment aimed at restoring some of the natural conditions along the Colorado, which has grown cooler and clearer, and less hospitable for native species, since Glen Canyon Dam was built more than 30 years ago.
Scientists believe the trout that moved into the river after the dam's completion have contributed to the decline of the humpback chub and other native fish.
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