Figure 2. — Juvenile northern anchovy gilled in the meshes (%-% inch) of a mid-water trawl off the Washington-Oregon coast. 



occurrence of independent spawning activity by 

 the northern subpopulation of anchovies. 



Discussion 



Figure 1 gives the results of surveys which 

 took place during the winter or spring. Since 

 the northern subpopulation apparently spawns 

 during the summer, then these figures indicate 

 that spawning occurred during the summer which 

 preceded each survey period. In other words, 

 Figure la and b indicate that spawning occurred 

 during the summer of 1965, resulting in recruit- 

 ment of 0-age fish during January-April 1966. 

 Moreover, Figure Ic and d indicate that spawn- 

 ing occurred in the summer of 1966, resulting 

 in recruitment during November 1966-February 

 1967. Thus, according to Richardson's data and 

 this analysis, independent spawning by the 

 northern subpopulation seems to have occurred 



June July- August August September October 



Figure 3. — Ranges, medians, and median quartiles of lengths 

 of northern anchovy larvae obtained during May-October 1969 

 off Oregon (Richardson 1973). 



214 



