Abstract
Laboratory-bred cichlid fishes, Aequidens latifrons, were tested individually in a modified optomotor apparatus in which the rotation of the vertically striped drum changed direction every 56 sec. Over a period of five consecutive daily tests, quantitative changes in optomotor behavior that are characterized as more efficient responding occurred. That is, the fish followed the moving stripes more accurately in all the measures that we used to define it. Retesting some subjects on Days 11–15, 43–47, and 89–93 showed that these changes in behavior persisted and are therefore characterized as a learning phenomenon. A hypothesis is presented concerning the ontogeny of optomotor behavior based on the experience gained by juveniles in viewing the conspicuous vertical stripes of other members of the school when following them.
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