. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 460 470 480 490 WAVELENGTH mmu. 430 450 470 490 WAVELENGTH mmu 510 FIGURE 2. The action spectrum for positive phototaxis as determined by an equal-energies method. The points determining the curve represent the maximum increase in cell numbers (accumulation) following a given stimulus. Inset: The action spectrum for the active spectral region of positive phototaxis. The points determining the curve represent the lowest relative intensity at which maximum orientation was observed during a 10-second stimulation. phototactic re
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 460 470 480 490 WAVELENGTH mmu. 430 450 470 490 WAVELENGTH mmu 510 FIGURE 2. The action spectrum for positive phototaxis as determined by an equal-energies method. The points determining the curve represent the maximum increase in cell numbers (accumulation) following a given stimulus. Inset: The action spectrum for the active spectral region of positive phototaxis. The points determining the curve represent the lowest relative intensity at which maximum orientation was observed during a 10-second stimulation. phototactic response curve was determined at this energy in a point-by-point man- ner. A aliquot was taken from the culture, and placed in the slide well. The resulting preparation was covered with a standard glass coverslip, removed from the culture chamber and placed on the scanning stage in the dark. It was allowed to stand undisturbed for three minutes before being tested for the response, this time being necessary to allow the cells to reach random distribution in the well. The sample was then stimulated in the prescribed manner and following photogra- phy was discarded. Several samples were taken at each wavelength to insure an adequate sample size (n=: 100). The resulting action spectrum may be seen in Figure Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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