Arizona and lower Colorado River. The purpose is to determine the feasitility of harvest- 

 ing these fishes on a sustained commercial basis. Production and marketing possibilities 

 for the products are surveyed. 



Colorado 6-2-D Robert E. Vincent $26,250 



R aising bait fishes in the Rocky Mountain States - The fathead minnow, Fimephales promelas , 

 which is native to Colorado, is considered for commercial production and sale as bait 

 minnow in the Rocky Mountain area. Growth and mortality of this species as influenced by 

 population density in experimental ponds are investigated. 



Illinois 4.-33-R William M. Lewis Completed 1969 



Investigation of problems associated with the confinement of warm-water fishes in holding 

 tanks - The purposes of this study are to determine whether oxygen levels affect 

 the occurrence of epizootics of pathogens in holding tanks and wh.'ther temperature 

 manipulation may control the epizootics. Fisheries Research Laboratory of Southern Illinois 

 University, Carbondale, does this work. 



Illinois 4.-36-R George W. Bennett $12,070 



P hysiological and behavioral relationships among species of fishes - Channel catfish, golden 

 shiner, and tilapia are isolated as individual species, as well as combined in separate 

 combinations, to observe growth rate. Conditions of direct antagonistic behavior and of meta- 

 bolic or hormonal action within and between these species are observed, also. Sam A. Parr 

 Fisheries Research Center, Marion County, does this work. 



Indiana 4.-16-R Darryl Christensen Completed 1968 



Inland waters commercial fisheries studies - Studies were completed on the Wabash and White 

 Rivers to evaluate the efficiency, extent, and harvest by commercial fisheries. Tests were 

 also made of the harvest potential of D-nets and hoop nets. 



Indiana A-A3-'R James J. Barry $3/^,300 



I nter-species relationships of fi sh in Indiana waters of Lake Michigan - This project is 

 designed to determine how long salmon inhabit the Indiana waters of Lake Michigan and to 

 determine their behavioral pattern with other fish species. Collections of fish will be 

 made with gill nets and trawls, and fish will be inspected aboard commercial vessels. 



Iowa /^-ll-R Harry M. Harrison $27,33/h 



Industrial and commercial food fish investigations - Evaluations are made of utilization of 

 carp and buffalofish as food fish and gizzard shad and suckers as pet food or for protein 

 additive in livestock feed. 



Maryland AFC-3 Ralph A. Bitely $108,950 



Stream improvement program for anadromous fish management - This project includes ac- 

 tivities that range from a basic survey of all Maryland streams that provide or have a po- 

 tential for providing spawning habitat for anadromous fish to their ultimate improvement 

 and maintenance. Obstructions to free passage of fish are corrected where practicable. For 

 streams where biological information is lacking or perhaps obsolete, an inventory of bio- 

 logical productivity is obtained. 



Michigan AFC-1 Myrl Keller Completed 1967 



Appraisal of stocks of anadromous fishes in the Michigan waters of the Great Lakes - Scien- 

 tific gear was purchased for the Michigan Department of Conservation's new research vessel 

 Steelhead for research on commercial species in Lake Michigan. 



Al 



