Lineor Cotch Rote 

 vs. Temperature 



10 15 20 



Temperoture (°C) 



Miniinuin 

 Maximum 



Trip Cotch Rote 

 vs Temperature 



/ . 

 / / 

 / ■■ 

 / •' 



'.^' 



Figure 17. Quadratic regression analysis of minimum and 

 maximum water temperatures versus catch rates of shovel nose 

 sturgeon in the Tongue River in the spring of 1975. 



Linear Catcti Rote 

 vs Temperature 





/ 



•2! 2°C 



10 15 20 



Temperature CO 



Minimum 

 Moximum 



15 20 



Temperature (°C) 



Figure 18. Quadratic regression analysis of minimum and 

 maximum water temperatures versus catch rates of shovelnose 

 sturgeon in the Tongue River in the spring of 1976. 



43 



