. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. TIDAL TIMING IN EGG HATCHING RHYTHM 379 200^ 100- -100-. 10 -200J FIGURE 6(B): Correlation between the timing of larval release by the Kasaoka population and the time of high water, 1-12 September 1980. The value for HW-X was calculated by the same method shown in Figure 6A. Semilunar rhythm of larval release at Kasaoka The time of day of larval release at Kasaoka is shown in Figure 5. It is evident that the time of day of larval release did not coincide with a lunar day cycle, but with a local tidal cycle. Larvae w
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. TIDAL TIMING IN EGG HATCHING RHYTHM 379 200^ 100- -100-. 10 -200J FIGURE 6(B): Correlation between the timing of larval release by the Kasaoka population and the time of high water, 1-12 September 1980. The value for HW-X was calculated by the same method shown in Figure 6A. Semilunar rhythm of larval release at Kasaoka The time of day of larval release at Kasaoka is shown in Figure 5. It is evident that the time of day of larval release did not coincide with a lunar day cycle, but with a local tidal cycle. Larvae were released only at night, suggesting that the solar day cycle suppressed daytime larval release in all cases. In addition, larval release activity revealed a combined pattern of 24 h solar day and h unimodal tidal components, corresponding to the phase relationship between a solar day cycle and h tidal cycle. The solar day component appeared when high water came about sunset and sunrise, and the tidal component appeared at different times. When the larval release activity revealed a strong correlation with nighttime high water, the average activity peak (X) was a little before the high water (HW) (Fig. 6A, B). The estimated time from X to HW then differed somewhat in tidal cycles during the night: 42 min from 11 to 17 July, 17 min from 24 to 31 July, and 49 min from 4 to 12 September, respectively on the average. The average peak. 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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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
