GENETIC VALUK RATINGS FOR FISH 



Rating Description 



A - A genetically pure population as determined bv electrophoresis. 



B - A potentially pure nopulation where there is no record of 

 contaminating species — . Not applicable to native rainbow trout as 

 their purity can be determined only by electrophorosls. 



C - A potentially pure population where no contaminating species exist, 

 but planting records indicate that a contaminating species (which 

 could cause hybridization) has been planted in the drainage. 



D - An especially valuable genetically pure cutthroat trout population 

 (determined by electrophoresis) where there are also contaminating 

 species. Tntrogression may be static or receding due to reproductive 

 isolation. This rating also applies to sympatric populations of 

 native and non-native rainbow trout. 



E - A potentially pure population where contaminating species are known to 

 exist . 



F -. A genetically pure population may exist, but no documentation is 

 available. 



G - A genetically pure population could exist but is not present. 



H - A hybridized or introgressed population known to exist based on 

 electrophoresis. 



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(a) Contaminating species for native rainbow trout are: golden trout, 

 cutthroat trout and any hybrid Salmo except hybrid brown trout. 



(b) Contaminating species for westslope or Yellowstone cutthroat trout 

 are: rainbow, golden, other strains of cutthroat trout, and any 

 hybrid Salmo except hybrid brown trout. 



(c) Contaminating species for bull trout is brook trout. 



CRITERIA FOR LARGE-SIZE FISH 



Species Kg Lbs 



Northern pike 6.8 15.0 

 Bullhead — 



black & yellow 

 Channel catfish 

 Burbot 



Smallmouth bass 

 Largemouth bass 

 Grapple — 



black (, white 

 Yellow perch 

 Sauger 

 Walleye 



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