Locomotor Activity of Land Crabs during the Premolt Period

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Science  15 Jul 1960:
Vol. 132, Issue 3420, pp. 145-147
DOI: 10.1126/science.132.3420.145-a


When maintained in darkness, premolt specimens of Gecarcinus lateralis, with or without eyestalks, show variations in level of activity according to six distinct stages. Furthermore, in darkness the rhythmic pattern of premolt crabs with eyestalks resembles that of eyestalkless premolt crabs, the intervals between principal bursts of activity being generally shorter than in nonpremolt crabs.