||Effects of thermal discharge on aquatic insects in the Tennessee Valley /
Tennessen, Kenneth J. ;
Miller, Johnny L.
||Tennessee Valley Authority, Muscle Shoals, AL. Div. of Environmental Planning.;Environmental Protection Agency, Washington, DC.
|| Environmental Protection Agency, Office of Research and Development, Office of Energy, Minerals, and Industry ; For sale by the National Technical Information Service,
Aquatic insects--Texas--Tennessee Valley Region. ;
Aquatic animals--Effect of water pollution on. ;
Thermal pollution of rivers, lakes, etc.--Physiological effect--Tennessee River. ;
Thermal pollution of rivers, lakes, etc.--Tennessee River--Physiological effect
Heat tolerance ;
Cooling water ;
Water pollution ;
Electric power plants ;
Aquatic animals ;
Life cycles ;
Size measurement ;
Thermal pollution ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||xii, 50 pages : illustrations ; 28 cm.
The Tennessee Valley Authority (TVA) conducted studies to (1) determine the thermal tolerances of selected aquatic insects and (2) investigate growth and emergence of those insects in the vicinity of TVA electric generating plants. Results of the study will be used to help establish thermal effluent limits to protect the aquatic ecosystem. Tolerance of the immature stages of Hexagenia bilineata and Coelotanypus sp. to thermal shocks of up to 20C was found to be great. However, eggs subjected to a shock of 15C resulted in a greatly reduced mean percentage of hatching. No difference in fecundity of adult females was found between ambient and thermal plume stations. Adult males from the heated discharge channel were significantly larger on the average than adult males from the ambient station.
Issued July 1978. Interagency Agreement No. D8-E721-DR, Project No. E-AP 80-BDR, Program Element No. INE-625A. Includes bibliographical references (pages 48-49). Microfiche.