. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 232 Urinary rate HENRY O. WERNTZ Rate of urine flow is plotted against concentration of medium in Figure 2. Despite considerable variability in the data, it is apparent that in both species the rate of flow was much greater in the more dilute media. Urine production was 0 C .2 0 6 + r~ ~r~ i ~~i 1 1 ) () • ()1 i o 0 O CD 8 GAMM ARUS FASCIATUS I* • LU z ¥-03 > A _ O O z O O UJ LU to. ir- m O H LU LU Ll_ U_ () () GAMMARUS OCEANICUS L _L 0 OSMOTI
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 232 Urinary rate HENRY O. WERNTZ Rate of urine flow is plotted against concentration of medium in Figure 2. Despite considerable variability in the data, it is apparent that in both species the rate of flow was much greater in the more dilute media. Urine production was 0 C .2 0 6 + r~ ~r~ i ~~i 1 1 ) () • ()1 i o 0 O CD 8 GAMM ARUS FASCIATUS I* • LU z ¥-03 > A _ O O z O O UJ LU to. ir- m O H LU LU Ll_ U_ () () GAMMARUS OCEANICUS L _L 0 OSMOTIC CONCENTRATION OF MEDIUM, _J M/KG FIGURE 4. Relationship of urine concentration to blood concentration in various media, in G. oceanicus and G. fasciatus. Filled circles represent the difference: (urine concentration minus blood concentration) for individuals. Open circles show the mean difference; vertical lines ±2 X the standard errors. Mean blood concentrations are given in parentheses. detectable at higher salinities in G. oceanicus than in G. fasciatus. Moreover, the maximum rate (over 4% of the body weight per hour) in G. oceanicus was more than twice as great as the maximum rate (around 2%} in G. fasciatus. A few determinations on specimens of both species at 25° C. indicated that the rate was roughly twice that of animals in the same concentrations at 15° 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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