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Free Content Nul Values of Temperature, Illumination, and Pressure for a Series of Oceanic Copepods

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Nul values of temperature, illumination, and pressure are those values at which an animal is not stimulated to migrate vertically. A method is described for their determination, and the numerical solutions were calculated for eleven species of oceanic copepods. As with the corresponding factors, which are the relative sensitivities of the animals to departure from the nuls, there are diurnal rhythms in the nuls; they vary downwards through the population of a species, and they show characteristic differences in shallow- and deep-living species. The fact that the nuls approximate the environment, and vary downward as it does, supports the validity of the basic mathematical model.

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Document Type: Research Article

Publication date: 1966-06-01

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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