Alternate Title

Use of Otolith Morphology for Separation of King Mackerel (Scomberomorus cavalla) and Spanish Mackerel (Scomberomorus maculatus)


Shapes of otoliths (sagittae) of king and Spanish mackerel (Scomberomorus cavalla and S. maculatus) were compared using theta-rho analysis aided by digitized computer methods. Otoliths from three king mackerel groups [Yucatan (Mexico), northwest Florida, and North Carolina] and one Spanish mackerel group were examined. Seven analytical combinations of measurements were tested. Intraspecific separation was highest using two truss systems (66.7-70.0% and 57.7-77.5%) and interspecific separation was highest using length and width radii (91.7%).