UNITED STATES DEPARTMENT OF THE INTERIOR, Oscar L. Chapman, Secretary 

 FISH AND WILDLIFE SERVICE, Albert M.Day, Director 



ESTIMATION OF SIZE OF ANIMAL 



POPULATIONS BY MARKING 



EXPERIMENTS 



By Milner B. Schaefer 



FISHERY BULLETIN 69 



From Fishery Bulletin of the Fish and Wildlife Service 



VOLUME 52 



UNITED STATES GOVERNMENT PRINTING OFFICE . WASHINGTON : 1951 



For sale by the Superintendent of Documents, U. S. Government Printing Office 

 Washington 25, D. C. - Price 15 cents 



