TRANSACTIONS 



of the 



American Fisheries Society 



"To promote the cause of fish culture; to gather 

 and diffuse information bearing upon its practical 

 success and upon all matters relating to the fisheries; 

 to unite and encourage ail interests of fish culture and 

 the fisheries; and to treat all questions of a scientific 

 and economic character regarding fish." 



FIFTIETH ANNUAL MEETING 



OTTAWA. CANADA 

 SEPTEMBER 20, 21, 22, 1920 



VOLUME L 

 J920- J92J 



Edited by Ward T. Bower 



Published Annually by the Society 



WASHINGTON, D. C. 



