1996 Annual Status Report. A Summary of Fish Data in Six Reaches of the Upper Mississippi River System,
GEOLOGICAL SURVEY ONALASKA WI ENVIRONMENTAL MANAGEMENT TECHNICAL CENTER
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The Long Term Resource Monitoring Program LTRMP completed 2,378 collections of fishes from stratified random and permanently fixed sampling locations in six study reaches of the Upper Mississippi River System during 1996. Collection methods included day and night electrofishing, hoop netting, fyke netting two net sizes, gill netting, seining, and trawling in select aquatic area classes. The six LTRMP study reaches are Pools 4 excluding Lake Pepin, 8, 13, and 26 of the Upper Mississippi River, an unimpounded reach of the Mississippi River near Cape Girardeau, Missouri, and the La Grange Pool of the Illinois River. A total of 59-75 fish species were detected in each study reach. For each of the six LTRMP study reaches, this report contains summaries of 1 sampling efforts in each combination of gear type and aquatic area class, 2 total catches of each species from each gear type, 3 mean catch-per-unit of gear effort statistics and standard errors for common species from each combination of aquatic area class and selected gear type, and 4 length distributions of common species from selected gear types.