Barbien et al Age, growth, and mortality of Micropogonias undulatus 



o 



c 



CD 

 13 

 CX 

 CD 



50 



25 



Pound net 



D^ 



50 



25 



2 4 6 8 



Haul seine 



20 



50 



25 



Gill net 



On 



50 i ?i 



25 



Trawl 



Oji: 



Age (years) 



15 



10 



Pound net 

 N = 1 061 



o V 



i i t — t 



150 200 250 300 350 400 



Haul seme 

 N = 332 



I I I | 



150 200 250 300 350 400 



150 200 250 300 350 400 



Trawl 

 N = 257 



I I 



150 200 250 300 350 400 



Total length (mm) 



Figure 7 



Age frequency (left panels) and length frequency (right panels) distributions by 

 fishing gear for Atlantic croaker in the Chesapeake Bay region, 1988-91. Num- 

 bers above bars are sample sizes by age. 



reported for Atlantic croaker. However, the close 

 agreement we found between estimates obtained 

 from maximum age and from the catch curve indi- 

 cates our values are probably realistic, at least for 

 the Chesapeake Bay area. Comparisons with previ- 



ous studies are difficult because other estimates 

 were based on different ageing methods (scales and 

 length frequencies), and on collections from a single 

 sampling gear and different geographical areas 

 (White and Chittenden, 1977; Ross, 1988). 



