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40 



■5 30 



o 20 



10 - 



B 



 March 

 H June 

 E3 August 



£ 30 



en 20 



1 2 3 



4 5 6 7 

 Size Class 



Figure 20 



The seasonal shift in size-frequency distribution for two Crassostrea 

 virginica populations in Chesapeake Bay. (A and B) exposed to 

 summer mortality; (C and D) exposed to winter mortality. (A and 

 B) coincide with the simulation depicted in Figure 19. (C and D) 

 coincide with Table 2, case 51. 



1 2 3 



4 5 6 7 

 Size Class 



8 9 10 



Figure 21 



The seasonal shift in size-frequency distribution of a Crassostrea 

 virginica population in Chesapeake Bay exposed to an (A) early 

 spring (March/April) and (B) early fall (August/September) bloom. 

 The complementary case of two later blooms is depicted in Figure 

 20, C and D. More information can be found in Table 2, case 48. 



Engle, J. B., and A. Kosenfield. 



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