UNITED STATES DEPARTMENT OF COMMERCE 



Maurice H. Stans, Secretary 



NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION 

 Dr. Robert M. White, Administrator 



NATIONAL MARINE FISHERIES SERVICE 

 Philip M. Roedel, Director 



Occurrence of Thiaminase in 



Some Common Aquatic Animals of 



the United States and Canada 



By 

 R. A. GREIG and R. H. GNAEDINGER 



Special Scientific Report — Fisheries No. 631 



Seattle, Washington 

 July 1971 



