X
IX.
X.
XI.
XII.
XIII.
I.
11.
111.
IV.
V.
V I .
vir.
VIII.
CONTENTS
Chcmical Composition
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Importance of Pelagic Shrimps as Food Resources . . 304
Summtiry . .
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Acknowledgements
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References . .
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Circadian Periodicities in Natural Populations of
Marine Phytoplankton
ALAIN S O U R N ~ A
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In trod uc tiori
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Thn Generation Time of Phytoplankton Cells . .
A. The Data . .
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B. An Order of Magnitude . .
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A. Culture Expc3riments
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B. Natural Popirlations
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Cell Division tilid Synchrony
(1. Open Questions . .
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Buoyuncy and Sinking . .
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Vertical Migration. .
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A. Observrrtions
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B. Phototrictic 1 mplicstioiis
C. Other ImplicutionR
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Chlorophyll A Content . .
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Other Cellular Charticteristics . .
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Thc Rhythm of Photosynthetic ( ! ripcity
A . Ilefinition and Chrwackristics . .
I3. Mechanisms
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