||Reproduction and distribution of fishes in a cooling lake : Wisconsin power plant impact study /
Rondorf, Dennis W. ;
Kitchell, J. F.
||Wisconsin Univ.-Madison. Water Resources Center. ;Wisconsin Public Service Corp., Green Bay. ;Wisconsin Dept. of Natural Resources, Madison.;Environmental Research Lab.-Duluth, MN.
Cooling ponds--Wisconsin--Portage ;
Black crappie--Fertility--Wisconsin--Portage ;
White bass--Fertility--Wisconsin--Portage ;
Cooling water ;
Lake Columbia ;
Thermal pollution ;
Electric power plants ;
Temperature gradients ;
Spatial distribution ;
Statistical data ;
Coal-fired MHD generatores ;
||Some EPA libraries have a fiche copy filed under the call number shown.
||69 pages : illustrations
||Spatial and temporal patterns during reproduction and early life history of fishes were studied in a manmade cooling lake. Lake Columbia, impounded in 1974, near Portage, Wisconsin, has an area of 190 ha, a mean depth of 2.1 m, and a 15C temperature gradient derived from the thermal effluent of a 527-MW fossil-fueled generating station which began operating in 1975. The lake was initially colonized by fishes when filled with Wisconsin River water. Observations suggest a decline of species diversity of the fish community due to direct action of upper lethal temperatures, absence of colonization by warm-water, lake-dwelling species, and lack of recruitment for certain species. Spatial and temporal patterns of spawning of black crappie were altered by a rapid rise in water temperatures following plant start-up after a three-week shutdown. Elevated temperatures subsequently shortened the spawning season, induced resorption of ova, and caused loss of secondary sexual characteristics. After initially drifting with water current, juvenile stages of sunfish and gizzard shad responded to changes in the thermal gradient by horizontal and vertical shifts in abundance.
||Caption title. "June 1985." "EPA/600/3-85/049." Microfiche.
||Duluth, MN :
||Prepared in cooperation with Wisconsin Public Service Corp., Green Bay, and Wisconsin Dept. of Natural Resources, Madison.
|Corporate Au Added Ent
||Environmental Research Laboratory (Duluth, Minn.)
|PUB Date Free Form
||PC A04/MF A01
|OCLC Time Stamp
|OCLC Rec Leader
||01141nam 2200301Ka 45020