1992 FISH ASSESSMENT FOR SNY MAGILL AND BLOODY RUN WATERSHEDS
G. Wunder and L. Stahl
Iowa Department of Natural Resources
Fish and Wildlife Division; Fisheries Bureau
RR #1; State Fish Hatchery
Decorah, IA 52101
Water quality improvement projects have been implemented by various state and federal agencies on the combined North Cedar/Sny Magill Creek watershed in northeast Iowa. This report summarizes the second year of involvement of the Fisheries Bureau in this long-term monitoring project. It provides additional baseline data and ongoing evaluation of changes in water quality through use of a stream forage fish survey and subsequent identification of suitable indicator species. Samples from Sny Magill in 1991 contained forage fish species typically found in middle to high quality Iowa trout streams. The population consisted of eight fish species and was dominated by fantail darter followed by redbelly dace and blacknose dace in relative abundance. Samples from 1992 contained nine fish species also dominated by fantail darter and blacknose dace. Only small numbers of redbelly dace were collected in 1992. Fish samples taken on North Cedar and Bloody Run creeks were dominated by fantail darters and slimy sculpin, respectively. Autopsies of creek chubs from Sny Magill Creek indicated that population to be in a normal, healthy condition.