collected in the Tongue were considerably larger than those collected at 

 Intake. Additionally, the length distribution is much wider for the Intake 

 sample than the Tongue River sample, which was taken from a spawning 

 population and is not representative of the entire population; the Intake 

 sample was from the total population. The average length of shovelnose 

 migrating into the Powder River was 761 mm (30.0 in), comparable to those 

 sampled in the Tongue River (Rehwinkel et al . 1976). 



20-1 



Yellowstone River 



Tongue River 



500 600 700 



Fork Length (mm) 



I I I I I I 

 10 



l—\ — 1 — I — I 1 1 

 20 



~i 1 I 1 I I I I r 



30 



Fork Lengtti (incties) 



Figure 7. Comparison of the fork length frequencies of shovel- 

 nose sturgeon taken in the Tongue River with those taken in the 

 Yellowstone River at Intake in the spring of 1975. 



28 



