Diel locomotor activity pattern of juvenile Limulus polyphemus Linnaeus.
Ten juvenile Limulus polyphemus, tested individually for 3-day periods in electronic shuttleboxes, exhibited a nocturnal activity pattern; activity was four times as great at Night as during the Day.
D000818:Animals; D002940:Circadian Rhythm; D006737:Horseshoe Crabs / Q000502:physiology*; D009043:Motor Activity