. The Biological bulletin. Biology; Zoology; Marine biology. OSMOTIC RESPONSES OF A POLYCHAETE 129 adaptation, due to the hyperosmotic body fluids in the new, lower salinity. The results (an average of 19 worms per point) are graphed in Figure 6a. As in the downward transfer entirely within the salinity range of osmotic conformity (Fig. 5a), there was an immediate decrease in the concentration of total body chloride, which reached a value not statistically different from that expected in worms adapted to 5% sea water (black arrow) by the eighth hour after transfer. Maximal water (weight) gain
. The Biological bulletin. Biology; Zoology; Marine biology. OSMOTIC RESPONSES OF A POLYCHAETE 129 adaptation, due to the hyperosmotic body fluids in the new, lower salinity. The results (an average of 19 worms per point) are graphed in Figure 6a. As in the downward transfer entirely within the salinity range of osmotic conformity (Fig. 5a), there was an immediate decrease in the concentration of total body chloride, which reached a value not statistically different from that expected in worms adapted to 5% sea water (black arrow) by the eighth hour after transfer. Maximal water (weight) gain was by the eighth hour, followed by volume reduc- tion. The net chloride loss had a maximum rate of —39 fxM , in the first half-hour after transfer, and an average rate of —15 fiM Cl~ for the entire first hour. This latter rate is somewhat higher than the maximum rate found in A'^. Sliceinea for a less severe transfer from 50% to 23% sea water (initial gradient 159 mM Ct; maximum rate —8 fiM ) (Oglesby, 1965b). 4. Upward transfer out of the salinity range of hyperosmotic regulation. N. limnicola, after adaptation to 4% sea water (24 mM Cl~), was transferred to 51%. 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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