95 



Figure 21-1.— Commercial 

 landings of hard and softshell 

 clams and bay scallops from the 

 southeastern U.S. coast, 1950-90. 



10 



o 

 o 

 o 



c 



Hard clam landings 

 Softshell clam landings 

 Bay scallop landings 



1950 



1955 



1960 



1965 



1970 



1975 



1980 



1985 



1990 



Figure 21-2.— Commercial 

 abalone landings from the U.S. 

 Pacific coast, 1950-90. 



. . . FISHERIES 



have been developed for such Chesapeake 

 Bay species as the oyster and blue crab to 

 try to achieve consistent management be- 

 tween states. Some states, notably Florida 



and California, have prohibited all com- 

 mercial harvest of certain species by des- 

 ignating them as gamefishes. 



STATUS 



It is difficult to assess the status of these with the Chesapeake Bay oyster. Others, 



stocks throughout their ranges because 

 they are under varied management and 

 data collection systems. Many of the spe- 

 cies in Table 21-1 are probably over- 

 exploited, at least in part of their ranges, as 



like many of the herrings, are difficult to 

 assess because the data on abundance 

 and stock structure are sparse, dispersed, 

 or nonexistent. 



