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Fishing Mortality 



Instantaneous fishing mortality (F) for ages 4 and 

 older in 1977 was estimated to be 0.39 (see section on 

 Methods) . Age-specific F values computed from cohort 



analysis, assuming instantaneous natural mortality (M) 

 = 0.30, for 1962-76 are given in Table 3. Mean annual F 

 values for ages 3 and older were stable during 1962-64, 

 averaging 0.04, and then increased steadily to a peak of 

 0.74 in 1976. 



