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Science 25 August 1967:
Vol. 157. no. 3791, pp. 937 - 941
DOI: 10.1126/science.157.3791.937
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Articles

Vertical Diurnal Migration and Endogenous Rhythmicity

J. T. Enright 1 and W. M. Hamner 2

1 Scripps Institution of Oceanography, University of California, La Jolla
2 Department of Zoology University of California, Davis

Experimental studies of mixed populations of marine zooplankton have demonstrated that internal rhythms, synchronized by a light-dark cycle, are of dominant importance for the vertical migration of several species of crustaceans. For certain other organisms, the vertical migrations observed in the experiments can be accounted for as direct responses to light intensity only. Performances intermediate between these extremes were also observed, as well as behavior based on biological timing mechanisms that are not rhythms in the usual sense.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
The effect of ultraviolet radiation on the vertical distribution and mortality of estuarine zooplankton.
C. L. Speekmann, S. M. Bollens, and S. R. Avent (2000)
J. Plankton Res. 22, 2325-2350
   Abstract »    Full Text »    PDF »
Tidal Vertical Migration: An Endogenous Rhythm in Estuarine Crab Larvae.
T. W. CRONIN and R. B. FORWARD JR. (1979)
Science 205, 1020-1022
   Abstract »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)