DeVries and Grimes: Spatial and temporal variation in age and growth of Scomberomorus cavalla 
705 
colleagues at the Mote Marine Laboratory were es- 
pecially helpful both in field sampling in Mexico and 
in ensuring the shipment of samples and data to us. 
Special thanks are also due to the North Carolina 
Division of Marine Fisheries and, in particular, to L. 
Mercer, L. Nobles, and R. Gregory, for providing us 
