66 



DEPARTMENT OF FISH AND GAME 



1 



3r 



JLj. mmm 



IF 13 



-xmjwftwr- 



c  ' 



h\ 



The M. V. Yellowfm is used chiefly for assessing abundance of sardines. She carries a wide 



variety of specialized equipment, including sonar (bottom left) as an aid in locating fish schools 



and such standard aids in navigation as radar (bottom right). 



Wildlife Service, the age composition and numbers of fish in each season's 

 tonnage have been ascertained. During the present bienninm the fishery 

 relied, in a large measure, on sardines spawned in 1946, 1947, and 1948. 

 These year classes were fished intensively when two and three years old 

 and seriously reduced in numbers before they had grown to the larger 

 sizes which reach the more northern fishing grounds. As a result,- there 

 was no sardine fishing in the Pacific Northwest, practically none off 



