FISHERY BULLETIN: VOL. 81, NO 4 



Red Porgy M = 0.35 



Yield Per Recruit in Weight 



Red Porgy M = 0.20 

 Yield Per Recruit in Weight 



— 300g 



275g 



FIGURE 1.— Yield per recruit in weight of 

 red porgy where M = 0.35. 



less than half the average F needed to take the max- 

 imum. At the lower estimates of M for white grunt, 

 vermilion snapper, red porgy, and black sea bass — 

 those species that supply the greatest numbers and 

 most weight to the headboat catch — 86, 80, 92, and 

 80%, respectively, of the maximum yield can be taken 

 with anF = 0.3. This is only 50, 55, 60, and 43% of F 



Vermilion Snapper M= 0.50 

 Yield Per Recruit in Weight 



FIGURE 3.— Yield perrecruit in weight of vermilion snapper where M 



= 0.50. 



Figure 2.— Yield per recruit in weight of 

 red porgy where M = 0.20. 



684 



