Life History and Population Statistics of Sauger) . The maximum 

 sample size of male walleye on any one day was 55.7 fish/km which 

 compares to 13.5 males/km for sauger. The maximum sample size of 

 female walleye and sauger on any one day was 6.5 and 7.3 fish/km, 

 respectively. 



Priegel (1970) found male walleye comprised 70 (2.3 males: 1 

 female) to 98% (49 males :1 female) of the mature walleye captured 

 on tributary spawning marshes to Lake Winnebago, Wisconsin. The 

 sex ratio for all walleye collected at Intake during any one year 

 ranged from 9:1 to 16:1 while the ratio on any one day ranged from 

 2:1 to 73:1. Priegel (1970) attributed the observed dominance of 

 males on the spawning grounds to two factors: 1) males arrived 

 earlier on the grounds and remained throughout most of the spawning 

 season, and 2) males began to mature at age 3 while females were 

 not first mature until age five. This is very similar to 

 observations on the lower Yellowstone. 



Recapture Rate and Movement 



Of the 155 walleye tagged at sample sites in the Yellowstone 

 River system upstream from Intake diversion, 7 (5%) were recaptured 

 at the same site during spring of the same year (Table 14) . Five 

 of these were recaptured in the Tongue River. Only 2 (1%) were 

 recaptured during spring of a subsequent year at the site of 

 tagging (Tongue River) . 



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