. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGURE 4. Effects of light on voluntary and driven flashes. A series of voluntary flashes, large flashes of uniform intensity, occurs along with electrically driven flashes of irregular intensity. Intensity of driven flashes is seen to depend upon temporal proximity to a previous voluntary flash. Illumination terminates voluntary component with progressive consequent diminution of driven flash magnitude. Upper trace, light organ. Lower trace, stimulus artifact (downward) and illumination artifact (upward). Time mark, 30 sees
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGURE 4. Effects of light on voluntary and driven flashes. A series of voluntary flashes, large flashes of uniform intensity, occurs along with electrically driven flashes of irregular intensity. Intensity of driven flashes is seen to depend upon temporal proximity to a previous voluntary flash. Illumination terminates voluntary component with progressive consequent diminution of driven flash magnitude. Upper trace, light organ. Lower trace, stimulus artifact (downward) and illumination artifact (upward). Time mark, 30 sees. merit in which the driven flashes remain at low ebb until spontaneous flashing resumes. If the level of excitation had been somewhat lower, we presume that the experimental record would have created the impression of complete inhibition of driven flashes by illumination. 4. Attempts to effect transfer of inhibition from one firefly to another The experimental arrangement used by Brunelli et al. (1968a) to demonstrate inhibition transfer between individuals in pairs of Luciola italiea was duplicated in all essential particulars using males of Photiiris inissoitriensis. Photitris was used in preference to other American species of fireflies because it most readily flashes spontaneously under experimental conditions. In five experiments with good spontaneous flashing it was not possible to demonstrate transfer of inhibition of spontaneous flashing from one P. Jiiissouriensis to another upon illumination of the eyes of one animal with light ( Fig. 5 ). Since inhibition transfer occurred in the Luciola experiments in 8-15 seconds, we attempted to obtain an estimate of the minimal transfer time of an appropriate chemical agent from one insect to. 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
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
