WASHINGTON (Cont. ) 

 Fish and Wildlife Service, Branch of Fishery Biology 



1. The Vitamin Requirement of Chinook Salmon (Proj. 41). 



A study to determine the quantitative vitamin requirements of chinook salmon. 



Hdqtrs. : Univ. of Wash. , Seattle; began Sept. 1951, continuing; Robert R. Rucker 



and John E. Halver, leaders. 

 Address correspondence to: John E. Halver, Chief, Salmon Nutrition Lab. , Univ. 



of Wash. , Seattle, Wash. 



2. Gill Disease Studies (Proj. 43a). 



The objective of this project is to describe the pathology of the gill disease caused 

 by a nutritional deficiency so that this disease can be recognized more definitely 

 when encountered among fish populations. 



Hdqtrs. : Univ. of Wash. , Seattle; began in the spring 1951, to be completed in 1955. 

 Address correspondence to: Robert R. Rucker, Chief, Western Fish Disease Lab., 

 Univ. of Wash. , Seattle, Wash. 



3. Virus Research (Proj. 43b). 



Studies indicate that a virus is the major etiologic agent responsible for several 

 serious outbreaks of disease. This investigation proposes to study the virus 

 disease of fish, their effect on the fish, how infection is transmitted, determine 

 source of infection, develop sera for identification and development of control 

 measures. 



Hdqtrs. : Univ. of Wash. , Seattle; began September 1952, continuing. 

 Address correspondence to: Robert R. Rucker, Chief, Western Fish Disease Lab. , 

 Univ. of Wash. , Seattle, Wash. 



4. Development of Better Practical Diets (Proj. 51). 



A survey to explore growth potential and nutritional adequacy of potential fish food 

 products and to develop practical diets for salmon. 



Hdqtrs. : Salmon-Cultural Lab. , Entiat, Wash. ; began 1948, continuing. 

 Address correspondence to: R. E. Burrows, Chief, Salmon- Cultural Lab. , 

 Entiat, Wash. 



5. Development of Hatchery Equipment (Proj. 52). 



The objective is to determine environmental factors affecting development of salmon 

 reared under artificial conditions and to develop rearing ponds which will satisfy 

 requirements for optimum environmental conditions and efficient operation. Model 

 studies of raceway, Foster-Lucas, and circular ponds and correlation of pond 

 characteristics with hydraulic conditions to be first phase of investigation. 



Hdqtrs. : Salmon-Cultural Lab. , Entiat, Wash. ; began 1948, continuing. 

 Address correspondence to: Roger E. Burrows, Chief, Salmon-Cultural Lab., 

 Entiat, Wash. 



116 



