Abstract
1. 1. Normal juvenile nurse sharks are capable of learning both a black vs. white and horizontal vs. vertical black and white stripes discrimination. 2. 2. During the course of learning such visual discriminations, the sharks manifested some of the stereotyped behavioral patterns seen in more complex animal species such as position preference and vicarious trial and error. 3. 3. A shark with extensive damage to the optic tectum was able to learn the same visual discrimination within the normal range of trials to criterion. 4. 4. General early postoperative observations indicate that learning by the tectal shark may represent some type of recovery of visual function.
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