Evidence of two-clock control of endogenous rhythm in the Washington clam, <Emphasis Type="Italic">Saxidomus</Emphasis><Emphasis Type="Italic">purpuratus</Emphasis>
1.Marine Environment & Climate Change Laboratory, Korea Ocean Research & Development Institute, Ansan, PO Box 29, Seoul 425-600, Korea,;2.Department of Oceanography, Inha University, Inchon, 402-751, Korea,