NOTE Ahrenholz et al,: Periodicity of increment formation in otoliths of Brevooitia lyrannus 



425 



£ 3 



2 - 



^-.^.. 



*-!h-. 



i 



25 45 65 



Increment count (days) 



85 105 



Figure 3 



Estimates of mean width for otolith growth increments from larval-juvenile Atlantic 

 menhaden {Brevoortia tyrannus) from each test-rearing group. The error bars represent 

 ±1 SE, with f!=3 for each data point (the error bars may be hidden by the symbol for 

 some entnes). The arrow denotes when the alizarin marking occurred. At-sea values are 

 thus to the left of the arrow. (Note: after ALC marking, the low-salinity group was reared 

 at a higher temperature than the high-salinity group.) 



into estuarine systems from North Carolina to 

 northern Florida. Additional studies may be 

 necessary for more northern systems, such as 

 Chesapeake and Delaware bays, especially for 

 fall-spawned postlarval menhaden that may 

 overwinter in even colder waters and for more 

 extended periods of time. 



Acknowledgments 



Critical reviews of the manuscript were provided 

 by A. B. Powell, J. W. Smith, and D. S. Vaughan. 

 Support for the study was provided in part by 

 the SABRE program of the National Oceanic and 

 Atmospheric Administration s Coastal Ocean Pro- 

 gram / Coastal Fisheries Ecosystems Studies. 



Literature cited 



Ahrenholz, D. W. 



1991. Population biology and life history of the North 

 American menhadens (Genus Brevuortia). Mar. 

 Fish. Rev. 53(4);3-19. 



