DISTRIBUTION OF FISHES

Thirty-two Mile Creek drains a 276 km2 area in south central Nebraska as a tributary to the Little Blue River. Fishes were collected during the summer of 1977 using a seine. Nine species were collected at the 16 stations sampled. The fathead minnow (Pimephales promelas) was the most abun-dant species and present at every station. Black bullhead (lctalurus melas), carp (Cyprinus carpio), and red shiner (Notropis lutrensis) were widespread while other species had limited distributions. Species diver-sity was determined for each station and stream order. Fish distribu-tion and abundance in the drainage were affected by a recent dam and other environmental factors. Measurements of physical parameters such as water temperature, depth, current velocity, substrate composition, turbidity, and abun-dance of cover provided insights for analysis of species ' habitat require-ments. t t