TOPEKA SHINER, U.S. FISH AND WILDLIFE SERVICE, ROCK ISLAND, ILLINOIS

Status
To date, the shiner has been confirmed in 11 counties. It will likely be found in more.

County	Creek
Buena Vista	North Raccoon River (floodplain wetlands)
Boone	North Raccoon River (floodplain wetlands)
Calhoun	Camp Creek West Fork Camp Creek Cedar Creek East Cedar Creek Lake Creek Prairie Creek Purgatory Creek North Raccoon (floodplain wetlands)
Carroll	North Raccoon River (floodplain wetlands)
Dallas	Elm Branch North Raccoon River (floodplain wetlands) Swan Lake Branch
Greene	East Buttrick Creek West Buttrick Creek Cedar Creek Hardin Creek North Raccoon River (floodplain wetlands) Short Creek
Hamilton	Boone River tributaries Brewers Creek White Fox Creek tributaries
Humboldt	Boone River tributaries
Kossuth	Prairie Creek Prairie Creek tributaries
Lyon	Kanaranzi Creek (not yet known to occur, but listed for Critical Habitat) Little Rock River Rock River
Osceola	Little Rock River
Sac	Blackhawk Lake outlet Indian Creek and tributaries North Raccoon River (floodplain wetlands)
Webster	Brushy Creek Reservoir outlet West Buttrick Creek Ditch #57, Lost Grove Creek
Wright	Boone River tributaries Brewer's Creek Ditch #3 Ditch #19 Eagle Creek White Fox Creek

One interesting aspect that the sampling has revealed is that the shiner is not restricted to the main channels of these streams as previously thought. Rather is has turned up in a number of off-channel habitats such as oxbows, cutoffs, and ponds. Dr. Menzel believes there may be a correlation between finding the shiner in these off-channel habitats and the discharge of groundwater into such areas via a sand/gravel lens.

U.S. Fish and Wildlife Service, Rock Island, Illinois

TOPEKA SHINER

STATUS IN IOWA