. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 184 S( HOLAXDER, CLAFF, TENG AND WALTERS stayed at a constant depth, the nitrogen tension in the swimbladder should, there- fore, in time, adjust itself to that of the surrounding water—, atmospheres at all depths. If such were the case, however, the nitrogen percentage in the swim- bladder gas should come out as 80 divided by the total pressure in atmospheres. At one atmospheres pressure—/.?., at the surface—the nitrogen should be 80 per cent, at 10 atmospheres total pressure the nitrogen should be 8 per cent, at 10
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 184 S( HOLAXDER, CLAFF, TENG AND WALTERS stayed at a constant depth, the nitrogen tension in the swimbladder should, there- fore, in time, adjust itself to that of the surrounding water—, atmospheres at all depths. If such were the case, however, the nitrogen percentage in the swim- bladder gas should come out as 80 divided by the total pressure in atmospheres. At one atmospheres pressure—/.?., at the surface—the nitrogen should be 80 per cent, at 10 atmospheres total pressure the nitrogen should be 8 per cent, at 100 DEPTH IN METEFVb 10 20 30 HO 50 (,0 70&090100 200 300 HDD Ve ALE WIFE t M I o oo 5 ILVLK HflK o I I I I I I. 8 / 2 3 ATMOSPHERES FIGURE 3. Percentage nitrogen in the swimbladder gas of vertically migrating species. TV presented points and lines same as Figure 2. atmospheres per cent, etc. If the log. of the depth in atmospheres is plotted against the log. of the nitrogen percentage, we would accordingly get a straight line relation such as shown in Figure 2. We see in Figure 2 that the predicted correlation between the nitrogen per- centage and the depth holds rather well for most of the species. The correlation i> even better if we consider that the nitrogen per cent in the intact swimbladder at the bottom was lower than found 5-30 minutes later when the gas was taken from the body cavity of the asphyxiated fish. The dotted line in Figure 2 and l-'igure 3 indicates how much nearer the points would fit the prediction if the ob-. 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
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