Abstract
Abstract A morphometric comparison was made between cultured and wild American shad (Alosa sapidissima). Seven morphometric measurements, made with an ocular micrometer and dial caliper calibrated to 0.1 mm, were: standard length, preanal length, predorsal length, head length, eye diameter, snout length, and body depth. A linear relationship between each of the dependent variables and standard length was strongly supported by the statistical evidence. Expressed as a percentage of the means, the standard errors (SE) ranged from 1.3 to 6.9%. The different developmental environments of the two groups of fish did not produce morphometric differences in the measured characteristics; therefore, such measurements cannot be used as an aid in distinguishing cultured from wild American shad.
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