Georgia 2-8;i-R James W. Andrews, Jr. $3f',000 



A study of the nutritional, physiological, and economical requirements for the production of 

 channel catfish in an intensive running water culture - This study at Skidaway 

 Institute of Oceanography, University of Georgia, is designed to evaluate the interactions 

 of environmental and dieting factors on growth, health, body composition, and economic 

 aspects of channel catfish production. Environmental variables will include water flow, 

 aeration, stocking rates, water tejuperature , and light conditions. An attempt will be made 

 to estimate the dietary requirements of various nutrients in this type of production. 



Illinois ^-32-R William M. Lewis $15,593 



Feeding-out catfish in cages - The University of Southern Illinois has this project underway 

 to determine the feasibility of stocking yearling channel catfish in cages in infertile lakes 

 such as stripmine lakes and producing marketable size fish by feeding them daily. 



Illinois /i-51-R William M. Lewis $U,100 



Considerations in the commercial production of channel catfish in cages - Channel catfish are 

 reared in cages anchored in ponds at Southern Illinois University to determine the carrying 

 capacity of different size ponds, optimum number of fish per cubic yard, optimum cage depth, 

 value of mechanical aeration, and variations in fish growth. 



Kansas /i-l-R Roy E. Schoonover Completed 1968 



Investigation on digestion and metabolism of the channel catfish - Six ponds at the Tuttle 

 Creek Fisheries Research Laboratory near Manhattan are each stocked with 300 age class II 

 channel catfish. Fish in three ponds are fed formulated fresh-water fish meal, and fish in 

 the other three ponds are fed formulated marine fish meal. At 2-week intervals the fish 

 populations are sampled to study growth under various feeding regimes during various seasons. 



Kansas U-Wj-B. Roy E. Schoonover $28,000 



Investigations on nutrition and metabolism of catfish and utilization of fisheries products - 

 This study, subcontracted to Kansas State University, will provide additional information on 

 the nutritional factors affecting channel catfish. Carbohydrate and energy utilization during 

 feeding, during the period of nonfeeding, and under varying temperature conditions are being 

 studied. Experiments on protein metabolism are also underway. 



Kentucky ^-27-R Hunter M. Hancock $U,000 



Catfish fishery investigations - Murray State University Biological Station is making these 

 studies on Kentucky Lake from Kentucky Dam to the Tennessee State line. Various size hoop 

 nets are fished under different conditions to determine how efficient and selective these 

 nets are in catching channel and blue catfishes. The station is also studying the growth and 

 abundance of these fish. 



Minnesota L-LU-^ Charles Burrows $5,000 



A physiological study of thermal stress in channel catfish - This study is primarily con- 

 cerned with how temperature changes in rivers affect the catalytic properties of heptic 

 catalese enzyme in channel catfish. An attempt is made to characterize this enzyme in the 

 livers of fish taken from thermally unpolluted waters. 



Ohio -4-6-R Russell Scholl $16,200 



Lake Erie commercial fisheries research - Studies are underway in Sandusky Bay of Lake Erie 

 to investigate methods of predicting the harvestable crops of channel catfish and white 

 bass, and properly harvesting these resources. Biological data and life history information 

 are col].ected, and gill net selectivity is investigated. 



South Dakota ^-/^9-R Charles Backlund $3,700 



Effects of intensive bullhead removal in selected lakes in eastern South Dakota - The shallow 

 fertile lakes in counties east of the Missoiari River are fished continuously with bullhead 

 pickets to reduce the bullhead populations to the lowest level possible. Measurements are 



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