. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. West Norway n = 627 (3). days of the semi-monthly zeitgeber cycle FIGURE 7. The influence of tidal mechanical water disturbances in a LD 16:8 on the emergence pattern of the two Clunio marinus stocks from southern England and western Norway. The vertical lines in the scheme below represent the time of daily water disturbances (6 hours every 12 h, 25 min) during the semi-monthly program. perature fluctuations exist parallel with the tides (Fig. 9), while the changes of me- chanical disturbances between ebb and flood are proba
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. West Norway n = 627 (3). days of the semi-monthly zeitgeber cycle FIGURE 7. The influence of tidal mechanical water disturbances in a LD 16:8 on the emergence pattern of the two Clunio marinus stocks from southern England and western Norway. The vertical lines in the scheme below represent the time of daily water disturbances (6 hours every 12 h, 25 min) during the semi-monthly program. perature fluctuations exist parallel with the tides (Fig. 9), while the changes of me- chanical disturbances between ebb and flood are probably weak or often absent in the sheltered fjords with low amplitude tides. If one compares the synchronization by the temperature zeitgeber with that by mechanical stimulation (Figs. 2, 7, Dorset stock; Fig. 8, Helgoland stock) one discovers differences of several days in the phase of the peaks relative to the semi-monthly zeitgeber cycle, even considering the Dorset experiment where a delay of two days was caused by the photoperiod influence described above. One may ask if these phase differences are merely a consequence of a randomly chosen correlation between both zeitgeber programs, or if they additionally demonstrate different properties of the physiological mechanisms for the perception of the temperature and mechanical zeitgebers. In fact, how both zeitgeber cycles can be exactly related to one another is a problem since in nature both factors reach their maximum values during different tide phases. The rise of temperature occurs during low tide and stops with the following. 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 Richar
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
