MINE STUDY AREA 



HUNTING DISTRICT 650 



150^ 



O 100 

 o 



o 

 o 



If) 



z 



s 



Figure 9. 



50 



1976 



1977 



1978 



1979 1980 



Year-to-year changes in pronghorn production ratios. Circle West 

 study areas (based on July-October ground and aerial survey data) 



100 -I 



WINTER SUMMER-FALL 



• • MINE STUDY AREA 



(INCL. PERMIT AREA) 



■ ■ PERMIT AREA 



1976 



1977 



1978 



1979 



1980 



Figure 10. 



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). 



-34- 



