Table 5 



Age structu:' 

 harvested in 

 and sex. 



e (modified technique) of bison 

 1988-89 by brucellosis test results 



No calves were tested for brucellosis 



REPRODUCTION 



Pregnancy Rates 



One hundred and two adult females were examined for 

 pregnancy, with 74 (75%) testing pregnant. Records from 

 Yellowstone dating back to 1931 show a range in pregnancy 

 rates of 52-94% (Meagher 1973) . There was no difference 

 (p>0,05) between pregnancy rates of animals testing positive 

 (R+S) for exposure to brucellosis (72%) and those that tested 

 negative (72%) (Table 6) . 



11 



