Abstract
The ontogeny of strombid behavior was studied by observing the behavior of Strombus maculatus veligers collected from the plankton and reared past metamorphosis to adults, and by observing juvenile strombids collected in the field. Complete adult modal action patterns (MAP's) associated with locomotion, feeding, and righting of overturned shells are performed by S. maculatus juveniles immediately after metamorphosis. There are changes in the frequency of the use of certain MAP's which are associated with variations in shell shape and size.

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