CALIFORNIA (Cont. ) 



Convict Creek Basin, Calif. ; hdqrs. Reno, Nevada; began July 1951, to 

 close September 1955; Nornnan Reimers, Leader. 



Address inquiries to: Reed S. Nielson, Chief, California -Nevada Inland 

 Fishery Investigations, Reno, Nev. 



Survival of Hatchery-reared and Wild Trout in Streams. 



The objective is to evaluate the extensive and expensive practice of stocking 

 hatchery-reared, catchable-size rainbow trout in streams and to determine the 

 factor or factors that limit their survival as a means of establishing improved 

 stocking practices and procedures. 



Hdqrs. Reno, Nev. ; began October 1950, to close October 1955; Reed S. 

 Nielson, Leader. 



Address inquiries to: Reed S. Nielson, as in No. 1 above. 



COLORADO 

 Game and Fish Department 



1. Fishhook and Lost Lake Studies. (FA: F-l-R in part) 



This project was designed primarily to give return-to-the-creel information 

 on marked plants of rainbow trout --3- and 5-inch fxsh. Data also was obtained 

 on fishing pressure and fishing success, limnology, food habit studies, and age 

 and growth studies. 



Continental Divide, in northwest portion of Colorado; began June 1948, to 

 close December 1953; $3,500; C. A. Weberg, Leader; reports available. 



Address inquiries to: W. D. Klein, Colorado Game and Fish Department, 

 1530 Shernnan Street, Denver, Colo. 



2. Experimental Fertilization of High Elevation, Relatively Unproductive Trout 

 Lakes. (FA: F-l-R in part) 



The objective of the study is to determine the relative effectiveness of 

 commercial fertilizer in increasing the productivity of high, unproductive trout 

 lakes. The project was extended in 1953 to include study of an additional lake 

 which was fertilized and a control lake. Plankton has been used as an index 

 of the value of the fertilization program initiated. 



Near top of Medicine Bow Range of Mountains, Larimer County; began 

 June 1951, to close October 1955; $3,500; Dr. JohnR. Olive, Leader; reports 

 available. 



Address inquiries to: W. D. Klein, as in No. 1 above. 



3. Parvin Lake Studies. (FA: F-l-R in part) 



An intensive creel census is being conducted to obtain return-to-the-creel 

 information from plants of hatchery-reared trout. Previous studies involved 

 rainbow trout, but studies initiated in 1953 will be devoted to return-to-the-creel 

 information from plants of brown trout. Routine limnological, food habit and 

 spawning migration studies are being continued. Considerable information is 

 being obtained on contribution to the creel of naturally produced trout. Extensive 

 data is being obtained on fisherman use, fishing methods and fishing success, in 

 conjunction with the other studies. 



Larimer County; began April 1949, to close November 1959; $10,000; James 

 Boyd, Leader; reports available. 



Address inquiries to: W. D. Klein, as in No. 1 above. 



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