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Free Content Plankton of the Florida Current.

III. The Control of the Vertical Distribution of Zooplankton in the Daytime by Light and Temperature

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The four groups, pteropods, siphonophores, chaetognaths and copepods, have been studied separately and together in the plankton of the Florida Current. Vertical diffuseness of plankton was found to be under the control mainly of light at its upper levels and of temperatures at lower levels. This is true both within a population of a single species and, to some extent, between species living at different depths. Finally, in the copepods only, changes in level in response to temperature and light changes are superimposed on a seasonal change in level of the population which may be correlated with the presence of successive broods.

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Document Type: Research Article

Publication date: 1953-01-01

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