. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 22 KARL M. WILBUR AND NORMAN G. ANDERSON Ld | 121 SlCM o: LJ Q. 8 LJ N 4 z LJ Cfi I- 2 0. 346 8 10 12 14 16 SHELL LENGTH-CM. FIGURE 2. Carbonic anhydrase activity of oyster mantle. Enzyme activity is expressed per gm. wet weight. Dry weight gives a similar relationship. The shell length represents average measurements on the shorter shell. Data plotted with solid lines (— —) are for oysters taken from a bed located on a sandy beach exposed to relatively rapid water movement. Data plotted with dashed lines (- - -) are for oys
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 22 KARL M. WILBUR AND NORMAN G. ANDERSON Ld | 121 SlCM o: LJ Q. 8 LJ N 4 z LJ Cfi I- 2 0. 346 8 10 12 14 16 SHELL LENGTH-CM. FIGURE 2. Carbonic anhydrase activity of oyster mantle. Enzyme activity is expressed per gm. wet weight. Dry weight gives a similar relationship. The shell length represents average measurements on the shorter shell. Data plotted with solid lines (— —) are for oysters taken from a bed located on a sandy beach exposed to relatively rapid water movement. Data plotted with dashed lines (- - -) are for oysters taken from an intertidal bed in muck containing fuel oil from ships and in a location not exposed to fast currents. D July 12, 1948. • July 12, 1948. Oysters kept in air 6^-7^ hours. VA July 12, 1948. Oysters kept in air 6M>-7% hours, then returned to water for 13 hours. A October 31, 1948. • March 5-6, 1949. istically distinct both in their form and with respect to seasonal ' The data indicated in solid lines in Figure 2 were obtained from oysters collected between low and high tide levels from a sand beach exposed to relatively rapid water move- ment. Dashed curves (Fig. 2) are for oysters growing between tide levels in muck containing fuel oil from ships and in a location which was not subjected to fast cur- rents. 5 Dr. A. F. Chestnut of the Institute of Fisheries Research of the University of North Carolina, Morehead City, N. C, found active deposition of shell by oysters in this region throughout this 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, 1
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