. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 47X WHEELER. BLACKWELDER AND WILBUR TABLE I Diurnal mantle actiritv and calcification rates. 10:^0 AM-2 :.?() PM 6:30PM-8:30PM Mantle: Minimum '", upturned* 8 83 1(1:1)0 AM 2:00 PM 1(1:110 AM- 2:00 PM Dark 7:00 PM-8:.W PM Dark Calcification cpm 14C-carbonate per mg per hr ± = 17 ± N == 25 ± N == 26 * Data tnim Wrenn (1972). Figures show minimum percentage of animals which turned mantles over the shell edge, forming vertical ridges. Diurnal deposition rates Shell growth increments in A. i
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 47X WHEELER. BLACKWELDER AND WILBUR TABLE I Diurnal mantle actiritv and calcification rates. 10:^0 AM-2 :.?() PM 6:30PM-8:30PM Mantle: Minimum '", upturned* 8 83 1(1:1)0 AM 2:00 PM 1(1:110 AM- 2:00 PM Dark 7:00 PM-8:.W PM Dark Calcification cpm 14C-carbonate per mg per hr ± = 17 ± N == 25 ± N == 26 * Data tnim Wrenn (1972). Figures show minimum percentage of animals which turned mantles over the shell edge, forming vertical ridges. Diurnal deposition rates Shell growth increments in A. irraJians, indicated by ridges that delineate a day's growth (Fig. 4). are formed by the upturning of the mantle over the shell edge (Wrenn, lc>72 ; Clark. 1(.'74). \Vrenn has demonstrated that the ridges are formed primarily in late afternoon and evening (Table I).. KIM KK 4. Scanning electron micrograph taken at the ventral edge of the right valve ( 30). Each vertically positioned ridge delineates one day's 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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