to be from walleye, 112 (71% of total number of eggs) were larger 

 than 2.00 mm (positive walleye) . The mean egg diameter was 2.11 mm 

 with a 90 percent confidence interval for any one egg of 1.87-2.35 

 mm. 



The date of maximum abundance of eggs, collected at 4 standard 

 transects downstream from Intake diversion, was; April 18, 1977 

 (the first day of sampling) , April 25, 1978 and May 1, 1979 (Figure 

 18) . The peak egg abundance during 1977 corresponded to peaks in 

 abundance of both male and female walleye and female sauger; male 

 sauger were almost absent in the samples at this time. During 1979 

 peak egg numbers corresponded closely to peak male walleye numbers 

 while sauger were at extremely low numbers. 



The earliest date eggs were collected was April 11, 1978 and 

 the latest was May 23, 1979. Eggs probably could have been 

 collected up to 7 days earlier had sampling commenced sooner in 

 1977. 



A gravel bar downstream from Forsyth diversion was kick 

 sampled for sauger and walleye eggs during 1978. Eggs were sampled 

 at 4 transects and samples were taken at 0.15 m depth intervals 

 (Figure 19) . In addition other likely locations were sampled 

 (Figure 19) . 



Only one egg was collected in the 74 samples taken on April 

 12, 17 and 26. The egg, taken on April 12 was probably from a 

 walleye as it was larger than 2.0 mm and a gravid female walleye 

 was collected at this site. During this sample period large 

 numbers of eggs were collected from the Yellowstone River at the 



47 



