Three fish-tight weirs have been installed at either end and in 

 the middle of a one mile stretch of Flint Creek a short distance below 

 Georgetown Lake, providing two half-mile test sections. These weirs 

 must be kept in place continuously so that no fish may move in or 

 out of the sections. This becomes a considerable task during the rigorous 

 winter conditions to which the stream is subjected. 



To date fish have been planted from two hatcheries, Anaconda and 

 Hamilton. The survival of fish liberated from the Anaconda Station 

 has been excellent, but mortalities have been heavy on rainbow trout 

 reared at Hamilton. Forty percent of the Hamilton fish and three 

 to five percent of the Anaconda fish died during the six-week period 

 following planting. Over-winter survival of the Hamilton fish is ex- 

 pected to be near zero, while it should be between 40 and 50 percent 

 for Anaconda. 



Regulations 



One of the tasks of the Fisheries Management and Investigations 

 Section is the design of fishing regulations for submission to the Fish 

 and Game Commission. A new form of regulations was adopted during 

 the winter of 1955-56 for the regulations to be used during the 1956-57 

 fishing season. In the past regulation has been effected by counties. 

 Thus, in reality, there have been 56 management areas for regulative 

 purposes. The newly adopted regulations are written by eight drainage 

 areas. Considerable simplification resulted in this change, and the 

 regulations were thereby shortened drastically. It is estimated that 

 condensing of the regulations will reduce the annual cost of printing 

 by about $10,000. 



Analysis of the Cost of Production of the Montana 

 Hatcheries System for the Bitnnium 1954-1955 



On the basis of fish planted, the Montana Hatchery System showed 

 an increase of 40 percent by number (79 percent by weight) during the 

 biennium January 1, 1954-December 31, 1955 as compared to the bien- 

 num May 1, 1952- April 30, 1954. Total expenditures during the period 



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