192 



Fishery Bulletin 89(2). 1991 



1989). The observed high density of eggs and larvae 

 in 1982 and subsequent success of the 1982 year-class 

 support the concept that attributes strong year-classes 

 to exceptional survival of eggs and larvae on the spawn- 

 ing grounds, rather than absolute size of spawning 

 stock (management actions designed to prevent over- 

 fishing and to increase size of spawning stock were not 

 yet in effect). After 10 years of poor year-classes, i.e., 

 1972-81, the stock producing this 1982 year-class must 

 necessarily have been small. Chapman's (1987, 1989, 

 1990) discovery of differences between genotype fre- 

 quencies of 1982 year-class males and those of older 

 Chesapeake Bay females is more direct evidence that 

 strong year-classes can stem from successful spawn- 

 ing by relatively few females. Unfortunately, we have 

 yet to determine which factors govern survival and 

 growth of striped bass eggs and larvae on Chesapeake 

 Bay spawning grounds, although recent research ef- 

 forts are addressing this important question (e.g., 

 McGovern and Olney 1988, Chesney 1989, Uphoff 

 1989). 



Acknowledgments 



This research was supported in part by the National 

 Marine Fisheries Service (NOAA) grants NA80FAD- 

 VA1B, NA81FAD-VA3B, NA81FAD-VA5B, and con- 

 tract AFC-14-1, and by NOAA Office of Sea Grant, 

 grant no. 5-29346. We particularly owe thanks to Bruce 

 H. Comyns, James E. Price, Cathy J. Womack, and 

 Patricia A. Crewe for their assistance in the study, and 

 to Daniel W. Sved, James A. Colvocoresses, and John 

 C. McGovern for early manuscript reviews. 



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