. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. TIDAL RHYTHM IN UCA 287 A semilunar rhythm of amplitude of the daily pigment dispersion The sums of the twelve daily average chromatophore indices for Series A, B, and C have been compiled in Table VIII and depicted in Figure 6. The ampli- tudes for the three series increased from the outset of the observations. The ampli- tude of the daily pigmentary rhythm of the Uca pugilator of both Series A and B 60 50 UJ Q D 40 h- 30 20. J_ 2 JUNE 0 18 26 4 JULY 12 20 FIGURE 6. The amplitude of the daily patterns for Series A, B, and C
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. TIDAL RHYTHM IN UCA 287 A semilunar rhythm of amplitude of the daily pigment dispersion The sums of the twelve daily average chromatophore indices for Series A, B, and C have been compiled in Table VIII and depicted in Figure 6. The ampli- tudes for the three series increased from the outset of the observations. The ampli- tude of the daily pigmentary rhythm of the Uca pugilator of both Series A and B 60 50 UJ Q D 40 h- 30 20. J_ 2 JUNE 0 18 26 4 JULY 12 20 FIGURE 6. The amplitude of the daily patterns for Series A, B, and C. The amplitude has been expressed as the sum of the 12 average chromatophore stages determined every second day for each series. Series A and B are Uca pugilator. Series C is Uca sfcciosa. then decreased noticeably. Increases and decreases followed one another. Closer inspection showed this increase and decrease of amplitude was semilunar in nature. The minima occurred 15 days apart which is the approximate frequency of a semi- lunar rhythm. Furthermore, these minima were observed on the same days that. 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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