— MINE STUDY AREA 



-- HUNTING DISTRICT 650 



150 



o 100 

 a 



o 

 o 



z 



I 



50 



1976 



1977 



1978 



1979 



1980 



1981 



Figure 5. Year-to-year changes in pronghorn production ratios, 

 Circle West study areas (based on July-October ground 

 and aerial survey data). 



100-1 



WINTER SUMMER-FALL 



• • MINE STUDY AREA 



(INCL. PERMIT AREA) 



■ ■ PERMIT AREA 



1976 



1977 



1978 



1979 



1980 



1981 



1982 



Figure 6. 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). 



-3 5- 



