UNITED STATES DEPARTMENT OF THE INTERIOR, Stewart L. Udall, Secretary 



FISH AND WILDLIFE SERVICE, Clarence F. Pautzke, Commissioner 



Bureau of Commercial Fisheries, Donald L. McKernan, Director 



VALIDITY OF AGE DETERMINATION 

 FROM SCALES OF MARKED AMERICAN SHAD 



By Mayo H. Judy 



FISHERY BULLETIN 185 



From Fishery Bulletin of the Fish and Wildlife Service 



VOLUME 61 



PUBLISHED BY THE U.S. FISH AND WILDLIFE SERVICE • WASHINGTON • 1961 

 PRINTED BY THE U.S. GOVERNMENT PRINTING OFFICE, WASHINGTON 



For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington 25, D.C. 



Price 15 cents 



