UNITED STATES DEPARTMENT OF THE INTERIOR 



Stewart L. Udall, Secretary 



John A. Carver, Jr., Under Secretary 



Stanley A. Cain, Assistant Secretary for Fish and Wildlife and Parks 



FISH AND WILDLIFE SERVICE, Clarence F. Pautzke, Commissioner 



Bureau of Commercial Fisheries, Donald L. McKernan, Director 



Comparative Study of Juvenile 



American Shad Populations by 



Fin Ray and Scute Counts 



By 



PAUL R. NICHOLS 



United States Fish and Wildlife Service 

 Special Scientific Report- -Fisheries No. 525 



Washington, D.C. 

 February 1966 



