Accession Number : ADA020069

Title :   Environmental Inventory and Assessment of Navigation Pools 24, 25, and 26, Upper Mississippi and Lower Illinois Rivers. An Electrofishing Survey of the Illinois River.

Descriptive Note : Final rept.,


Personal Author(s) : Sparks,Richard E.

Report Date : DEC 1975

Pagination or Media Count : 125

Abstract : The fish populations of the Illinois River were sampled in the autumn of 1974 by means of a 220-volt AC electroshocker, as part of an environmental inventory and assessment of effects of maintenance and operation of the nine-ft navigation channel in Pools 24, 25, and 26 on the Upper Mississippi River and lower 80 miles of the Illinois River. Comparative data were available from similar electrofishing surveys conducted from 1959 through 1973. Commercial fishing statistics and results of earlier fish surveys were available as far back as the 1870's. The Illinois River begins at the confluence of the Kankakee and Des Plaines Rivers. The effect of municipal and industrial discharges from the Chicago-Joliet area was evident in electrofishing catches from the Des Plaines River.

Descriptors :   *Fishes, *Fisheries, *Channels(Waterways), *Mississippi River, Sampling, Navigation, Abundance, Environmental protection, Maintenance, Statistical data, Pollution, Recreation, Industries, Oxygen, Sewage treatment, Food chain, Aquatic plants, Turbidity, Sediments, Surface temperature, Atmospheric temperature, Wind, Tables(Data), Illinois

Subject Categories : Biology
      Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE