Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Circadian and circatidal variations in the vertical distribution of the periwinkle Littorina scutulata in intertidal tidepools of the central California coast
Student Author(s): Merchant, Robert K.
Noroian, George II
Faculty Advisor(s): Phillips, John
Pages: 40
Location: Final Papers Biology 175H
Date: June 1978
Keywords: biological rhythms in marine and maritime organisms
Abstract: Fluctuations in the vertical distribution of Littorina scutulata in tide pools were observed at Mussel Point, Pacific Grove, California. L. scutulata appear to move into and out of tide pools as a function of the tidal cycle. This behavior is modified by the day - night cycle. The outward movement is positively correlated with dampness and negatively correlated with wave shock. The actual pattern of the in - out migration in each pool is complex and dependent on a large number of environmental variables which are not yet fully understood. The reasons for the in - out migration are still not known.