McDonough and Wenner; Growth, recruitment, and abundance of \uvem\e Mug/I cepha/us 



345 



80 30' 



80 00' 



79 30 



Parrot Creek 



Figure 1 



The major estuaries sampled during the juvenile aging study. Locations of collection sites for aging 

 (Grice Cove) and increment validation (Parrot Creek) in the Charleston Harbor estuary are indicated 

 in the inset. 



Data analysis 



The null hypothesis for the validation study was that 

 the number of increments counted after the OTC mark 

 equaled the number of days since marking. If these two 



numbers did not differ significantly, we could accept the 

 hypothesis that the increments were deposited daily. The 

 null hypothesis was tested by using a linear regression and 

 a parametric paired Ntest. 



