Table 20. Mean length and weight at annulus of walleye collected 

 downstream from Intake diversion, spring, 1978. 



Age 



Number aged 



Mean length 



Mean weight 



3 

 4 

 5 

 6 



7 



8 



9 



10 



50 

 136 

 192 

 366 



50 

 29 

 11 



1 



358 

 385 

 409 

 421 

 469 

 510 

 499 

 583 



406 



510 



612 



665 



928 



1199 



1199 



1320 



Catch Rates and Relative Abundance During Autumn 



Fifteen sample stations on the Yellowstone River were 

 electrof ished from Huntley to the North Dakota border during 

 autumn, 1977-1979. These approximately 8 km long stations were 

 lumped into 4 river sections (Figure 3) and analyzed accordingly. 

 Large concentrations of walleye were observed in section 1 during 

 1977 and 1978. Slightly higher numbers were observed in section 3 

 than 1 in 1979. Section 4 had the lowest concentrations of walleye 

 each year. In all sections walleye never comprised more than 10% 

 of the walleye-sauger catch (Table 9) . 



An 8 km section of the Yellowstone River near the mouth of the 

 Tongue River was intensively sampled during late summer and autumn, 

 1977-1980. The percent composition of walleye comprised 2.5, 3.2, 

 7.7, and 9.3 percent of the sample in 1977, 1978, 1979, and 1980, 

 respectively. A total of 81, 555, 575, and 441 sauger and walleye 

 combined were caught at this station each of the four respective 

 years. 



82 



