William B. Wrenn

The fish population in the heated discharge channel from Colbert Steam Plant on the Tennessee River was sampled from January 1972 to December 1973 to determine the effects of temperature on species composition, relative abundance, and diversity. Electrofishing (108 samples) and gill netting (36 samples) yielded a total of 34 species; median number of species per sample for each type ofgear was nine. Species that were commonly colleded from the discharge channel at maximum summer temperatures (33-35 C) included: spotted gar, gizzard and threadfin shad, carp, billegill, longear sunfish,...

The life histories of smallmouth buffalo (lctiobus bubalus) and freshwater drum (Aplodinotus grunniensl were studied during 1966-1968 in conjunction with the evaluations of commercial fishery gear on Wheeler Reservoir. In this reservoir, smallmouth buffalo grows as fast as or faster than it does in other reservoirs. They are 5 to 6 years old and 17 to 19 inches long before they are abundant in the commercial catch. Drum growth is slower in Wheeler than in other waters; they are not important commercially until they are 7 to 8 years old and 16 to 19 inches long. Asiatic clams, 1 to 2 mm...