Peters and Schmidt: Age and growth of larval and early juvenile Scomberomorus maculatus 
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Figure 2 
(A) Lapillus from a Spanish mackerel juvenile (SMI=0. 3) captured at Breach Inlet between 0309 h 
and 0830 h EDT. (B) Lapillus from a Spanish mackerel juvenile (SMI=0.9) captured at Breach 
Inlet between 1613 h and 2211 h. Incomplete marginal increment (mi), and adjacent fully formed 
increment (ai) are indicated. 
Age and growth analysis 
Whole lapilli from 415 larval and juvenile Spanish 
mackerel were examined. For larvae and juveniles 
<100 mm SL, otolith radius was measured from the 
center of the primordium to the margin of the otolith 
along a consistent axis. Measurements were made 
with an ocular micrometer at magnifications of lOOx 
or 400x depending upon the size of the otolith. Pre- 
sumed daily increments on the lapilli were counted 
on a video monitor under l,000x magnification. Two 
independent counts of presumed daily increments 
