Abstract
Pairs of fish fought while immersed in 20 mu g/ml or 40 mu g/ml pentobarbital sodium or plain water. The 40 mu g/ml group showed significantly less attack (e.g., biting, jaw locking) than either control or low dose groups without producing a change in general arousal. Quasisexual behavior, seen in an earlier chlordiazepoxide study, did not occur.
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