FISHERY BULLETIN: VOL 85, NO. 3 



(0 



£ 



(0 



QC 

 O 



UJ 



ir 



0. 

 Q 



_i 



UJ 



120 

 110 

 100 



90 



80 



70 



60 



50 



40 



30 



20 



10- 

 



A. ^ Entire Fishery 



Q Chesapeake Bay 



^'^-,--°- 



'^--O-- V 



J I L 



J L 



_i 



North Atlantic 

 I? Middle Atlantic 



20 

 10 



. South Atlantic 

 ° Fall Fishery 



1970 71 72 73 74 75 76 77 78 

 YEAR OF FISHING 



Figure 17. — Estimated yield per recruit of Atlantic menhaden for fishing pat- 

 terns and growth prevalent during years 1970-78. 



Table 9. — Estimates of percentage change in yield per recruit of Atlantic menhaden 

 with varied age at entry and rates of F for 1970-72, 1973-75, and 1976-78. The F 

 multiple of 1.0 represents the Fat age vector extant during each of the three time 

 periods. 



1 Estimated yield per recruit in grams for conditions of the time period, which is the base value for 

 calculation of percentage change 



590 



