Abstract
After an initial adaptation period in a tall, narrow tank, goldfish typically swim up and down at a fairly constant rate. If a loud buzzer is sounded during the ascent, a fish will either become immobile and remain near or actively swim to the bottom of the tank. Upon repeated experience with the buzzer, this apparently innate response habituates and the ascending latency gradually approaches baseline. This innate response was enhanced by a 10 mg/kg ip injection of magnesium pemoline. While the amount of habituation was greater in the experimental drug group than either the drug or buzzer control, this was apparently due to the initially higher response level. Neither spontaneous activity nor total testing time differed reliably among the three groups.
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