. The Biological bulletin. Biology; Zoology; Marine biology. RHYTHMS IN MAGNETIC RESPONSE 385 the time of moon-rise, and a maximum left-turning response is seen at lunar nadir. This is true whether one deals with either the N-S or E-W experimental fields. The lunar-day pattern suggests three progressively decreasing maxima as one moves through the lunar day. The overwhelming preponderance of negative values, in- dicating the induction of left-turning by the experimental procedure, clearly cor- roborates the results of the earlier solar-day study in demonstrating this response to the experiment
. The Biological bulletin. Biology; Zoology; Marine biology. RHYTHMS IN MAGNETIC RESPONSE 385 the time of moon-rise, and a maximum left-turning response is seen at lunar nadir. This is true whether one deals with either the N-S or E-W experimental fields. The lunar-day pattern suggests three progressively decreasing maxima as one moves through the lunar day. The overwhelming preponderance of negative values, in- dicating the induction of left-turning by the experimental procedure, clearly cor- roborates the results of the earlier solar-day study in demonstrating this response to the experimentally imposed weak fields. z+6 if) i h u Q Q a. < a 2 <. Z-7 NADIR ZENITH LUNAR DAY NADIR Figure 3. The standard deviation of the paths of experimental and control snails as a function of hour of lunar day. Sample standard errors are illustrated. See legend of Figure 1 for key. Standard deviation of paths In view of the solar-day rhythm of dispersion of paths established previously and indicating both right and left turning responses to the magnetic field, the standard deviations of all the samples of 20 controls, 20 animals in the N-S experi- mental field and 20 in the E-W field were next rearranged to ascertain whether a lunar-day fluctuation occurred also in this parameter. In Figure 3 is seen the mean lunar-day fluctuation of standard deviations for the month-period, July 6- August 4, for each of the two experimental conditions and the controls, separately. Standard errors of the means for the seventh hour before zenith and the sixth hour. 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; Hig
Size: 1595px × 1566px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectb, booksubjectzoology
