3.6 



3.7 



3.8 



3.9 4.0 41 4.2 43 44 4.5 



Figure 2, Natural and fishing raortallt 

 talitlas. Total mortalitlea for the fi 

 hand end cf each curre. 



lea for various combinations of effort ratio and total mor- 

 rst and second period respectively are /?:lven at the right- 



178 



