1990 Grayling Spawning Report 



Figure 5. Growth of grayling in the Big Hole River 

 drainage during 1988-89 estimated from mean 

 lengths at age. 



MOVEMENT ASSESSED USING TAG RETURNS 



A total of 42 grayling were recaptured during this sampling. 

 Of these 42, four were multiple recaptures of tags captured more 

 than once during 1989, leaving 38 recaptures to identify. Fifteen 

 of these recaptures were tagged within the same year (1989) and 23 

 were tagged in previous years (Table 3). Of the 23 tagged in 

 previous years, seventeen were tagged in 1988, one was tagged in 

 1987, and five tagging locations could not be determined. Of the 



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