The Oregon Department of Fish and Wildlife said the decision was made because a critically low number of wild steelhead are returning upriver this summer.
Steelhead are having a hard time getting past non-native bass that live further down the river, said Greg Huchko, a fish biologist with ODFW.
He said those predator bass are benefitting from several years of abnormally warm temperatures.
“It just makes the habitat more suitable for them," said Huchko. "And so they’re just kind of thriving right now. That just gives them that opportunity to increase their range, potentially, throughout the basin.”
The ban on fishing in the North Umpqua starts July 31and will last through the end of November.
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