■18- 



0) 



E 



3 

 C 



> 

 O 



c 

 a; 



3 

 CT 



Year class variation 'envelope' 

 / 



Possible subj. adjustm 



Partially 

 recruited ^ 

 year classes 



80% of population sexually 

 mature 



(F+M+S) (Fishing, 

 natural and spawning 

 mortalities) 



'0' bound 

 summary 

 effects 



Year class 



expectancy \ 



Figure 11. Schematic presentation of the derivation of 

 long-term mean age frequency distribution. 



