OKOBOJI (AP) - A fish kill at the Iowa Great Lakes in northwest Iowa has stumped experts.
White and yellow bass in the lower part of the chain are being affected.
Iowa Natural Resources Department biologist Mike Hawkins told Sioux City station KTIV that preliminary results from samples don't show any killer virus or bacteria. He says there's no danger to humans.
The fatality rate has dropped, but dead fish are still surfacing. Hawkins says the number is significant, but he doesn't have an exact count.
The Iowa Great Lakes are composed of several glacial lakes in Dickinson County. The three principal lakes are Spirit Lake, West Lake Okoboji and East Lake Okoboji.