COLORADO (Cont. ) 



and under new regulations; (2) population studies on selected sections before and 

 during new regulations; and (3) age and growth studies to check for changes in 

 growth rate. 



Game and Fish Department and Colorado A and M College cooperating; South 

 Platte River near Denver; began June 1954, to close December 1956; Howard A. 

 Tanner and W. D. Klein, Leaders. 



Address inquiries to: Dr. Howard A. Tanner, Leader, Cooperative Fishery 

 Research Unit, Colorado A and M College, Ft. Collins, Colo. 



2. Development of Electrofishing Techniques and Equipment. 



The project objective is the development of electrofishing equipment of 

 maximum efficiency for the waters of Colorado with particular emphasis on 

 development of portable equipment for back country work. The use of AC and 

 DC current, and various types electrodes will be evaluated. The physiological 

 effects of AC and DC current of various intensities will be an important phase 

 of the study. 



Game and F.sh Department and Colorado A and M College cooperating; 

 hdqrs. Ft. Collins; began April 1953, to close March 1955; $3,500; Howard A. 

 Tanner, Leader. 



Address inquiries to: Howard A. Tanner, as in No. 1 above. 



3. Rough Fish Control in Fluctuating Reservoirs. 



Objectives of the project are to evaluate the feasibility and value of a rough 

 fish (carp) control program in the large irrigation reservoirs of eastern Colo- 

 rado. Four years' data exist on the growth, food habits, abundance, and creel 

 census values of each species present. These data will continue to be collected 

 during a reduction of rough fish program. 



Game and Fish Department and Colorado A and M College cooperating; Lone- 

 tree Reservoir, Larimer County; began June 1950, to close December 1955; 

 Howard A. Tanner, Leader. 



Address inquiries to: Howard A. Tanner, as in No. 1 above. 



4. Walleye Spawn Taking, Using Pituitary Extracts. 



The project is an experimental attennpt to develop a source of walleye eggs 

 within the State. Evaluation of several methods of capture and the use of pituitary 

 injections to obtain early and uniform ripening dates will be carried out. 



Game and Fish Department and Colorado A and M College cooperating; Reser- 

 voir near Fades; began April 1954; to close June 30, 1954; $500; Howard A. Tanner 

 and Tom Lynch, Leaders. 



Address inquiries to: Howard A. Tanner, as in No. 1 above. 



5. Evaluation of Toxaphene as a Fish Toxicant. 



Objective of the project is to evaluate by laboratory and field experimental 

 applications the advantages and disadvantages of toxaphene as a fish toxicant, 

 having in mind its adaptation in rough fish elimination if it appears satisfactory. 



Game and Fish Department and Colorado A and M College; laboratory and 

 irrigation reservoirs. Fort Collins; began September 1953, indefinite; $500; 

 Howard A. Tanner, Leader. 



Address inquiries to: Howard A. Tanner, as in No. 1 above. 



U. S. Forest Service 



1. Effect of Timber Cutting on Water Yields in the Central Rocky Mountains. 



The objective of the project is to determine the effect of timber harvesting 

 upon streamflow and stream-borne sediment. Study area is a 700-acre water- 

 shed near Eraser, Colorado, in lodgepole pine and spruce-fir timber types. 



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