255 



Table l45. Seasonal use of slope by mule deer In the Tongue River 

 Dam study area. 



Slope 



Spring 

 1980 



Summer Pall 

 1980 1980 



Winter Spring Summer 

 80-81 1981 1981 

 % % % 



Plat 

 Gentle 

 Medium 

 Steep 



Total observed 



Use of vegetation - The majority of whitetail deer were observed in 

 riparian habitats, primarily deciduous tree and shrub types (Table 

 146). They were also observed in Juniper-sage, sagebrush-grassland 

 types, and hay fields. 



Table l46. 



Average group size and vegetational use of white-tailed 

 deer on the Tongue River Dam area. 



Spring 



Fall 



Winter 



Number groups 2"' 



Number deer 9 



Average group size 4.5 

 Vegetational type: 



Riparian 1005? 



Ponderosa pine/Juniper 



Grassland ' 



Agricultural 



2 

 7 



3.5 



1005? 

 

 

 



Antelope 



Population characteristics - During the study 697 antelope were 

 observed on the study area (Table l47). Average group size ranged 

 from 3.7 in summer to 23.0 in winter. Antelope observations per 

 hour of aerial survey ranged from 8.1 in summer of 1980 to 31.4 in 

 summer of I98I (Table 139). The highest number of antelope observed 

 per hour was 45.3 in July 198I. The number of fawns per 100 does was 

 around 85-90 in 198O, but fluctuated widely in 198I (Table l48). 

 This may have been due to different groups of antelope moving in and 

 out of the study area during 1981. 



