1990 Grayling Spawning Report 



captured and noted the approximate distance from these flags into 

 the channel which was the actual capture site. If we had placed a 

 survey flag, we noted whether the fish captured at that location 

 was ripe or mature . 



Stunned grayling, rainbow trout, and brook trout were 



captured, except as noted on Table 1. For all captured fish, 



length was measured to the nearest . 1 inch and weights were 

 recorded to the nearest 0.01 pound. 



Table 1. Electrofishing sampling dates, locations, and approximate 

 length of sample sections for electrofishing sampling of 

 the 1989 spawning arctic grayling population in the Big 

 Hole River. 



Date 



Location 



Section 

 length (mi) 



Comments 



4-18-89 Big Hole R. - E channel 2.0 

 below Wisdom 



4-19-89 Big Hole R. - McDowell 5.0 

 section above Wisdom 



4-20-89 Big Hole R. - Wisdom down 5.4 

 to Cemetery 



4-20-89 Swamp Creek - N Fk 2.0 

 Big Hole Rd to mouth 



4-21-89 Big Hole R. - Swamp Ck 0.2 

 to Sand Hollow Ck 



4-24-89 Big Hole R. - McDowell 5.0 

 section above Wisdom 



4-24-89 Big Hole R. - Doolittle 3.5 

 to Crane Ranch 



4-25-89 Big Hole R. - Twin Lake 4.0 

 Rd to Clemow Rd 



4-26-89 Big Hole R. - Wisdom 5.4 

 section below Wisdom 



6 GR - none ripe 



1 GR - immat 



8 EBT 



38 GR - 3 ripe M 

 36 EBT 



9 GR - 2 ripe M 

 67 EBT, 3 LING 



2 GR - 1 ripe M 

 2 EBT 



10 GR - 6 ripe M 

 10 EBT, 1 RB 



13 GR - none ripe 

 5 EBT 



2 GR - 1 ripe M 

 - 1 ripe F 



14 EBT, 2 RB 



24 GR - 14 ripe M 

 - 2 ripe F 

 20 EBT, 1 RB, 5 LING 



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