LIST OF TABLES 

 Table: Page: 



1. A summary of bison harvest in Montana 1974-1989 5 



2. Percentage of bison harvested by month in the 1988-89 

 remova 1 6 



3. Brucellosis test results by sex for bison harvested in 

 1988-89 6 



4. Age distribution of bison harvested in the 1988-89 

 removal by three aging methods 8 



5. Age structure (modified technique) of bison harvested in 

 1988-89 by brucellosis test results and sex 11 



6. Pregnancy results for bison harvested in 1988-89 by 

 brucellosis test results 12 



7. Determination of conception and potential calving 

 periods for 50 bison fetuses collected during the 

 1988-89 removal 13 



LIST OF FIGURES 

 Figure: Page: 



1. The distribution of bison harvest in 1988-89 2 



2. Age structure by three aging methods for bison harvested 

 during 1988-89 _. 8 



3. Modified age structure of bison harvested in 1988-89 

 (including unknown sex animals) 9 



4. Modified age structure of bison harvested in 1988-89 by 

 sex 9 



IV 



