YOY Movement 



McMichael (1989) observed that large concentrations of YOY 

 grayling were often observed near the areas where spawning 

 grayling had been found. This was true in only one of the six 

 spawning sites sampled in the present study. We found large 

 concentrations of YOY in section L (Bottoms) only. Discharges 

 (Table 1) were considerably higher at all other sampled spawning 

 sites. It is possible that the higher discharges this year 

 hampered sampling of YOY by our electrof ishing gear. YOY (mean 

 length = 26.5 run) were first captured near the edges of submerged 

 vegetation. 



Few YOY grayling were found in the river below the Wisdom 

 cemetery downstream to Pintlar Creek during the 1990 fall 

 population estimates (R. Oswald, pers. comm.). In order to help 

 determine where the YOY produced in this section move, we marked 

 40 YOY grayling (29 with an adipose clip and 11 with a notched 

 anal fin) in section L. The section was then electrof ished every 

 7 to 14 days in an attempt to observe any movements. 



Of the marked fish, only one was recaptured, three weeks 

 after being marked. This fish was recaptured within 1 to 2 

 meters of the original capture location, although this is 

 probably the result of "herding" the fish with the electrof ishing 

 gear. 



During the middle of August, flows in section L dropped to 

 an unmeasurable discharge and the YOY grayling nearly 

 disappeared, with only 3 to 6 grayling captured per visit from 



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