FISHERY BULLETIN: VOL. 84, NO. 4 



For the other three species, the YIB values fall 

 slightly below the Pauly and Gulland approximations 

 for two species and substantially above for the third 

 species. The mean YIB values obtained by the Pauly 

 and Gulland approximations are, moreover, in 

 substantial agreement with the mean value of YIB 

 obtained with the approach proposed here (Table 

 13). 



Table 13. — Annual maximum sustainable yield as a fraction of 

 unexploited recruited biomass (YIB J at F = 1 .0 together with 0.5 

 M and 2.3 w" 026 . 



Species groups 



YIB 



0.5 M 2.3 w- 026 



ACKNOWLEDGMENT 



This paper is the result of the Resource Assess- 

 ment Investigation of the Mariana Archipelago at 

 the Southwest Fisheries Center Honolulu Labora- 

 tory, NOAA. 



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