LIST OF FIGURES 



Figure 1. Location of new study area boundaries, areas considered 

 for mining, and new small mammal traplines. Circle West 

 area 3 



Figure 2. Stockpond and reservoir codes. Circle West area. 7 



Figure 3. Year-to-year changes in temperature parameters at Circle 



and Fort Peck recording stations 10 



Figure 4. Year-to-year changes in precipitation parameters at 



Circle West and Fort Peck recording stations. 10 



Figure 5. Year-to-year changes in sample abundance of ring- 

 necked pheasant along five roadside wildlife survey 

 routes. Circle West area. 28 



Figure 6. Year-to-year changes in lagomorph density indices, 



Circle West study area 28 



Figure 7. Year-to-year changes in mule deer production ratios, 

 Circle West study areas (based on September-October 

 ground and aerial survey data). 31 



Figure 8. Year-to-year changes in the mule deer winter density 



index for the Circle West study areas (based on the month 

 of the largest census obtained for the mine study area 

 during the winter season). 31 



Figure 9. Mule deer winter density index isopleths, 1979-80 35 



Figure 10. Mule deer winter density index isopleths, four-year 



average, 1976-80. 37 



Figure 11. Year-to-year changes in pronghorn production ratios, 

 Circle West study areas (based on July-October ground 

 and aerial survey data). 40 



Figure 12. Year-to-year changes in pronghorn summer and winter 



density indices for the Circle West study areas (based 

 on the largest aerial censuses obtained for the mine 

 study area during July-October and December-February, 

 respectively) 40 



Figure 13. Pronghorn summer density index isopleths, 1979 41 



Figure 14. Pronghorn summer density index isopleths, three-year 



average, 1977-1979 43 



Figure 15. Pronghorn winter density index isopleths, 1979-80 45 



Figure 16. Pronghorn winter density index isopleths, four-year 



average, 1976-1980 47 



ii 



