SPATIAL AND TEMPORAL FLUCTUATIONS IN DENSITIES OF GASTROPODS AND BIVALVES ON SUBTROPICAL COBBLED SHORES

摘要

On the cobbled shores of subtropical islands in Japan, cobble coverage seasonally fluctuates in shore-specific ways. Because of this, the densities of intertidal molluscs might seasonally vary in shore-specific ways. To examine this idea, the seasonal fluctua- tionsin cobble coverage and mollusc densities were compared on three cobbled shores on Ishigaki Island, Okinawa, subtropical Japan.