For 7 consecutive days slugs (Limax maximus) were exposed to escapable, inescapable, or no light-heat stress in an escape task. On Days 8 and 9 they were tested in a different escape task. The slugs in the inescapable light-heat group had reliably longer escape latencies and more failures to escape than the slugs in the escapable light-heat group or the no light-heat control group.
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