. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 150 D |E _«- O 100 50 W. R. ELLINGTON AND J. M. LAWRENCE Control • • Hyposmotic. 4 6 Days 8 10 FIGURE 1. Changes with time of the per cents of initial whole animal volume of Luidia clathrata maintained at control (ambient) salinity (27%c~) and at hyposmotic salinity (16%e). Points represent means (n = 5) ; vertical lines represent ± 1 were removed from the bowls and frozen immediately. The animals were re- turned to their aquarium until the next incubation period. This procedure avoided the buildup of organic material i
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 150 D |E _«- O 100 50 W. R. ELLINGTON AND J. M. LAWRENCE Control • • Hyposmotic. 4 6 Days 8 10 FIGURE 1. Changes with time of the per cents of initial whole animal volume of Luidia clathrata maintained at control (ambient) salinity (27%c~) and at hyposmotic salinity (16%e). Points represent means (n = 5) ; vertical lines represent ± 1 were removed from the bowls and frozen immediately. The animals were re- turned to their aquarium until the next incubation period. This procedure avoided the buildup of organic material in the water surrounding the animals which might have occurred otherwise. Ammonia was determined by the microdiffusion method of Conway (1962). Ammonium sulfate was used as the standard. The rate of ammonia excretion was calculated as ,ug NH3-N/g dry weight of the animal/hour. RESULTS Whole animal analyses Introduction of Luidia into the hyposmotic medium resulted in immediate cessa- tion of movement. Podia were insensitive to mechanical stimuli. Activitv of the j animals resumed within 48 hours. No deaths occurred in either the hyposmotically. 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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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
