WATANABE and LO: PRODUCTION AND MORTALITY OF SAURY 



Table 4. — Daily larval production at hatching (Pq) and daily instantaneous 

 mortality rates (IMR) of individual spawning years with standard error in 

 parentheses. 



40-0 



ej30 





-20- 



— 5 



< 



o 



I— 



y3 



a 

 o 



0"- 



5io 



cc 



>- 



<8 



az 



,o 



^i 

 a 



UJ 



< 



< 

 C/3 



z 



2- 



0- 



10 



73 74 75 76 77 78 79 80 81 82 83 84 85 86 

 SPAWNING YEAR 



Figure 6. — Year-to-year fluctuations of daily Pacific Saury larval pro- 

 duction at hatching in number of larvae per tow ( • ), daily 



IMR ( O ), and the annual total catch in metric tons 



( o ) of the saury. 



609 



