I might add that Smallmouth Bass in the Snake River do have an impact on smolts more so than the main stem Columbia, up to 46% of their total diet in the spring. Reducing numbers of Smallmouth and Walleye via sportfishing is ineffective. The biggest issue is not the population of the predators, but their habitat. The construction of the dams has created slower warmer waters, perfect habitat for Smallmouth and Walleye, not perfect for Salmonids. It has also caused the increase in Pikeminnow. So long as the habitat exists, eradication of the predators will be impossible. ODFW and WDFW are doing the best they can by controlling the biggest predator, Pikeminnow.