TENNESSEE (Cont. ) 



Tennessee Valley Authority 



1. Annual Fall Fish Population Inventory of T. V. A. Reservoirs 



Information is collected on the success of reproduction and survival of the 

 young, growth and size distribution of different species, available food for 

 game fish, trends in relative abundance of species, the presence or absence 

 of certain species, need for commercial fishing on T. V. A. mainstream 

 reservoirs, and need for introduction of new species. Small areas, 1 to 5 

 acres, are treated with rotenone in cove and deep water areas, all fish are 

 removed, separated to species, counted, weighed and measured, and scale 

 samples taken. 



Conservation Departments of Tennessee Valley States cooperating; head- 

 quarters - Decatur, Alabama, and Norris, Tennessee; began 1945, continuing; 

 Ben D. Jaco and C. J. Chance, Leaders. 



Address inquiries to: A. H. Wiebe, Chief, Fish and Game Branch, Norris, 

 Tennessee. 



2. Spring Creel Census on T. V. A. Reservoirs and Tailwaters 



The census is designed to determine qualitative and quantative trends in 

 the catch, residence of fishermen, fishing methods, hours fished, catch per 

 hour by number and weight, and type of license during a limited season of 

 April, May, and June on certain reservoirs and tailwaters. A census is taken 

 daily at selected stations but no attempt is made to census entire reservoir. 



Alabama Department of Conservation and Mississippi Game and Fish 

 Commission cooperating; Wheeler and Pickwick Reservoirs; began 1945, 

 continuing; $1,000; Ben D. Jaco, Leader. 



Address inquiries to: A. H. Wiebe, as in No. 1 above. 



3. Fish Harvesting on T. V. A. Reservoirs 



Fish are netted, caught by hook and line or removed from sinkholes and 

 tagged with Monel metal jaw tags. These studies are made to determine the 

 extent to which the available crop is harvested, the migration of fishes-- 

 especially upstream movement of some species at spawning time, the periodical 

 concentration in the tailwaters, movement between reservoirs, especially 

 mainstreams, and to gain an idea of changes in populations. Investigations 

 are carried out on both storage and mainstream reservoirs, but not on all 

 reservoirs simultaneously. 



Tennessee Game and Fish Commission cooperating; ten reservoirs; 

 began 1945, continuing; C. J. Chance and Ben D. Jaco, Leaders; reports avail- 

 able. 



Address inquiries to: A. H. Wiebe, as in No. 1 above. 



4. Environmental Studies 



These studies are designed to determine the fitness of the environment for 

 the existence and perpetuation of a given species of fish. They include studies 

 on water level fluctuations, determination of spawning temperatures, thermal 

 and oxygen stratification, discharges of deoxygenated water through turbines 

 into tailwater concentrations of fish, discharge of toxic materials into im- 

 poundments, and evaluation of the effect upon the fishery of mosquito larvicides. 



Reservoirs in Tennessee Valley; began 1937-1938, continuing; C. J. Chance 

 and Ben D. Jaco, Leaders; reports available. 



Address inquiries to: A. H. Wiebe, as in No. 1 above. 



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