. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 208 ALFRED M. BEETON had a maximum sensitivity at 490 m^u. Most insects apparently have two peaks of maximum sensitivity, 365 m/*, and 492 niju, (Weiss, 1943). Results obtained through the methods of these investigators are similar to those secured by in vitro studies of the spectral absorption of squid rhodopsin (Bliss, 1948). An electrical method has been employed to determine the spectral sensitivity of the eyes of Limulus (Graham and Hartline, 1935), a grasshopper, Melanoplus (Jahn, 1946), and the diving-beetle, Dytiscus
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 208 ALFRED M. BEETON had a maximum sensitivity at 490 m^u. Most insects apparently have two peaks of maximum sensitivity, 365 m/*, and 492 niju, (Weiss, 1943). Results obtained through the methods of these investigators are similar to those secured by in vitro studies of the spectral absorption of squid rhodopsin (Bliss, 1948). An electrical method has been employed to determine the spectral sensitivity of the eyes of Limulus (Graham and Hartline, 1935), a grasshopper, Melanoplus (Jahn, 1946), and the diving-beetle, Dytiscus (Jahn and Wulff, 1948). These studies demonstrated, as did the behavior method of Weiss, that the arthropod eye has a peak sensitivity in the green region of the spectrum. 100 10 en x_ OJ c I o> 0 Eo. - Reaction time (seconds) FIGURE 3. Reaction rate of Mysis rclicta to certain wave-lengths (m/ct) of light at various intensities. (Each point represents the average reaction time for 10 trials.) The only source of information on the sensitivity of mysids to various regions of the spectrum is Hess' (1910) study of the phototactic response of a marine mysid to certain regions of the visible spectrum. Sixty-four mysids were placed in the dark and then subjected to a continuous spectrum of light. The mysids swam toward the light and aggregated in certain regions of the spectrum: 40 in the yellow-green, 19 in the blue and violet, and 5 in the red. When the position of the spectrum was altered the mysids followed the yellow-green 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
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
