. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 80 60 40 20 10 08 04 Q O O _l GO 750 550 350 60 40 20 tr 8 12 16 20 24 28 32 36 40 44 TIME (h ) 48 FIGURE 2. Change in concentrations of ammonia and pH values in blood of shrimp transferred from 0%o to 24%o (mean ± SE of 9 to 15 animals per interval). Total ammonia added to beakers at T0 = 30 nM. Mean water values are given for comparison to blood concentrations. For both water and blood, circles = total ammonia (NH4 + NH3), O = 0%o, • = 24 %o; triangles = un-ionized ammonia (NHj). NH, was calculated as descr
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 80 60 40 20 10 08 04 Q O O _l GO 750 550 350 60 40 20 tr 8 12 16 20 24 28 32 36 40 44 TIME (h ) 48 FIGURE 2. Change in concentrations of ammonia and pH values in blood of shrimp transferred from 0%o to 24%o (mean ± SE of 9 to 15 animals per interval). Total ammonia added to beakers at T0 = 30 nM. Mean water values are given for comparison to blood concentrations. For both water and blood, circles = total ammonia (NH4 + NH3), O = 0%o, • = 24 %o; triangles = un-ionized ammonia (NHj). NH, was calculated as described in text, pK'a = for shrimp blood and ambient water at 24%o. Water pH constant at , blood pH beyond 26 h assumed to be mA/-l~'; a total net gain in these two FAA groups of about 78 mM-1 ' intracellular water. M. rosenbergii slowly acclimated to various salinities strongly regulated blood Na+ concentrations in ambient waters from 0%o to 24%o (Fig. 6A). Animals hy- perregulated Na+ to an isotonic point of about 210 mM Na («14%o) and hypo- regulated Na+ between salinities of 14-28%o. Over an ambient Na+ concentra- tion of 5 (0%o) to 366 (24%o) mM, average blood sodium increased from 150 to 250 mM. After a transfer from 0%o to 24%o, blood Na+ and total osmolarity, initially very hypotonic to the new medium, began to increase in 2-3 h. The rate of net sodium increase in blood over the first 7 h was mM-rT1, and between 7 and 48 h only mM-h"1 (Fig. 6B). Forty-eight h after the transfer there was still a large hypotonic gradient between blood and water Na+ (285 and 366 mM, respectively; Fig. 6B). The blood equilibration value of 285 mM Na+ after abrupt transfer was very close to 260 mM when shrimp were gradually acclimated to 24%o (Fig. 6A).. 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 origi
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
