Schmidt, K.P. 2000. Stream survey results for the gravel chub (Erimystax x-punctatus), slender madtom (Noturus exilis), and bluntnose darter (Etheostoma chlorosomum) in southeastern Minnesota. Final report submitted to the Minnesota Department of Natural Resources. 14+ pp.
In 1998 and 1999 stream surveys were conducted in the following major watersheds of southeastern Minnesota: Shell Rock, Cedar, Upper Iowa, Root, Zumbro Rivers; and larger tributaries to the lower Mississippi River. The gravel chub was found at 13 localities in two streams. The slender madtom and bluntnose darter were not found during the study, but have been collected in Minnesota waters in 1991 and 1997, respectively. Special Concern and recently delisted species collected during the study include: pirate perch (Aphredoderus sayanus), crystal darter (Crystallaria asprella), least darter (Etheostoma microperca) northern brook lamprey (Ichthyomyzon fossor), American brook lamprey (Lampetra appendix), Ozark minnow (Notropis nubilus), pugnose minnow (Opsopoeodus emiliae), and black redhorse (Moxostoma duquesnei). Other species collected that have limited distributions in Minnesota or reported for the first time from a stream or major watershed include: largescale stoneroller (Campostoma oligolepis), mud darter (Etheostoma asprigene), banded darter (Etheostoma zonale), redfin shiner (Lythrurus umbratilis), spotted sucker (Minytrema melanops), greater redhorse (Moxostoma valenciennesi), and suckermouth minnow (Phenacobius mirabilis).