Tidal Vertical Migration: An Endogenous Rhythm in Estuarine Crab Larvae

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Science  07 Sep 1979:
Vol. 205, Issue 4410, pp. 1020-1022
DOI: 10.1126/science.205.4410.1020


Field-caught larvae of the estuarine crab Rhithropanopeus harrisii have a tidal rhythm of vertical migration when maintained in constant conditions. Laboratory-reared larvae do not show this rhythm. Endogenous tidal vertical migrations aid the retention of these planktonic larvae in estuaries near the parent populations.