MONTANA (Cont. ) 



6. The Effects of Logging on Pinkhann Creek's Fish Population 



The purpose of this project is to measure the standing fish population of 

 Pinkham Creek over a period of years to the end that any changes which n-iay 

 develop in the population may be measured. This area of virgin timber is 

 now being logged. If this logging affects the aquatic environment, it is ex- 

 pected that this change will be reflected in the fish population. 



Lincoln County; began August 1951, to close April 1957; $400; Frank A. 

 Stefanich, Leader; reports available. 



Address inquiries to: Frank A. Stefanich, as in No. 5 above. 



7. Establishing Measures of Abundance of Cutthroat Trout in Ashley Lake 



At one time the cutthroat trout were abiindant in Ashley Lake and little 

 effort was required to catch a limit. Due to faulty management, the numbers 

 have dwindled to a dangerous low. This lake is used for spawn taking, and 

 traps are operated on four tributaries. In the last three years, the number 

 of cutthroat trout fry planted varied from 50 to 100 per surface acre of the 

 3,200-acre lake. Relatively few trout have been recaptured that have been 

 tagged in the traps since the project started. The purpose of the project is 

 to determine the relative abundance of trout in this lake so that the effects of 

 corrective management may be noted. 



Flathead County; began May 1951, closed November 1956; $700; Frank A. 

 Stefanich, Leader; reports available. 



Address inquiries to: Frank A. Stefanich, as in No. 5 above. 



8. Development of a Manual on Trout Culture 



The objective is to assemble and summarize material from the available 

 literature into a manual on trout culture. A library on trout culture will be 

 kept up to date and all acquisitions will be author and subject indexed. First 

 hand experiences with disease, diet or other fish culttiral problems will be 

 used to supplement the literature in preparing topical additions or corrections 

 for the present manual. Extensive lists of pertinent literature references will 

 be included with each summary added to the manual. 



Statewide; began May 1953, continuing; $500; Jack E. Bailey, Leader; 

 reports available. 



Address inquiries to: Jack E. Bailey, P. O. Box 602, Philipsburg, 

 Montana. 



9. Study of the Effects of Various Fish Cultural Practices on Winter Survival, 

 Growth, and Condition of Catchable-sized Hatchery Trout Planted into a 

 Mountain Stream. 



Data has been collected and is being analyzed relative to the effects of 

 high stocking rates on survival, growth, and condition of resident and planted 

 trout. No fishing pressure other than natural predation is exerted upon the 

 population. Serially numbered metal jaw tags are used for marking the fish. 

 A shocking device is used to census the entire study area twice a year. Fish 

 barriers are maintained. 



In an effort to measure the effects of transportation on overwinter survival 

 in Flint Creek, marked rainbow trout were hauled to the stream via three 

 different trip lengths based on actual planting trips made under Montana's 

 present planting program. The shortest trip required only one hour while 

 the longest required six hours in a 150-gallon, overhead spray tank. Data 

 on overwinter survival of these fish will be obtained during the 1957 spring 

 shock census. 



Montana Agricultural Experiment Station cooperating; Flint Creek; began 

 May 1954, indefinite; $15,000; Jack E. Bailey, Leader; reports available. 



8Z 



