The responses of terrestrial slugs (Lehmannia valentiana) to the mucus of stressed and nonstressed conspecifics were investigated. The latency to leave filter paper containing freshly secreted mucus from individuals stressed by prodding with a forceps was significantly faster than latencies to leave filter paper treated with mucus from nonstressed conspecifics. Stressed slugs may release substance(s) aversive to conspecifics.
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