Computation of Sport Fishery Value Score and Assignment of Class , 



a. Score = Sum of (grade for each criterion x multiplier — ). 



b. Assignment of Class 



Standards 



1. 



2. 



3. 

 4. 

 5. 



Score 



17 or more 



II or more 

 4 to 10 

 to 10 



Conditions 



Fish production based on natural 

 reproduction. Trout with abundance 

 B, D or V (large-size) or 

 paddlefish with abundance B must 

 be present — 

 and Ingress rating of 1, 2 or 3 



and esthetics rating of A, B, C or F 



and overall use^of 5,000 or more 



fisherman-days 



14 or more Ingress rating of 1, 2 or 3 



and overall use^of 2000 or more 



1'^ 

 fisherman-days — ^' 



13/ 



Game or sport fish present — ' 



Sport Fishery 

 Value Class 



2 

 3 

 4 

 5 



ASSIGNMENT OF FISHERY RESOURCE VALUE CLASS 



The fishery resource value class is simply the higher class given for 

 category 1 or 2 above. 



STUDY METHODS 



The long-established Montana Interagency stream fishery database was the central 

 feature of the present study. New stream reaches were added and information on 

 reaches already in the database was updated by field fisheries biologists of 

 Montana Department of Fish, Wildlife, and Parks; US Forest Service; and US 

 Bureau of Reclamation. The habitat values of spring streams were assigned by 

 Janet Decker-Hess, who at the time of this assessment was inventorying spring 



111 

 111 



13/ 



Multiplier for fish abundance is 2; multiplier for other criteria 



(ingress, esthetics and use) is 1. 



For the purpose of meeting the fisherman days requirement, the 



stream segment may be a composite of adjoining reaches that meet all other 



conditions for the class. 



See list of Montana fishes in Attachment. To qualify the fish must be a 



trout or "class A game or sport fish for streams" with abundance greater 



than rare. 



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