Mature sauger were generally collected singly, often with 

 great distances separating individuals. On no occasion were large 

 concentrations found which would typify a spawning ground. 

 Sampling for eggs where several gravid females were found together 

 produced no eggs. Never were more than 2 male sauger collected in 

 close proximity to one another. From Intake diversion to North 

 Dakota individual male sauger were often found associated with 

 groups of male walleye. 



Distribution of Prolarvae 



A total of 84 and 10 sauger prolarvae were collected in the 

 Tongue River near its mouth during 1979 and 1980, respectively. 

 Thirteen sauger prolarvae were captured in the Powder River near 

 its mouth in 1980. No larval sauger were collected in the 

 Yellowstone River upstream from the Tongue River during 1979 or 

 1980. Sampling efficiency, however, is much lower in the 

 Yellowstone than in the tributaries. A total of 8 sauger larvae 

 were collected in the Yellowstone both upstream and downstream from 

 Intake diversion during sampling in 1979 and 1980. 



Distribution During Summer and Autumn of Young-of-Year 



Thirty-four backwater/side channels were electrof ished from 

 river km 67 to 310 (Sidney to 12 km upstream from Tongue River) in 

 search of young-of-year sauger and walleye. Sampling occurred from 

 August 5 to 11, 1980. A total of 26 young-of-year sauger were 

 collected; 24 from the two downstream most backwaters sampled, 

 river km 68 and 70 (Table 6) . One young-of-year sauger was 

 collected 2.8 km downstream from Intake diversion (river km 114) 



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