The Integration of Activity Cycles in the Behaviour of Arenicola Marina L

Abstract

The common lugworm exhibits two distinct types of spontaneous activity cycle. Each of them has been described in some detail, but the method of approach was rather different in the two cases, and their integration has not yet been discussed. The experiments to be described were made to throw light on their mutual relations. The work was done at the laboratory of the Marine Biological Association of the United Kingdom, at Plymouth, in March and April 1950. The relevant features of the two cycles, as hitherto described, will first be summarized. For a more detailed review see Wells (1950).