. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 224 M \LCOLM S. GORDON horcas, after three days in 50% sea water, were insignificantly different from those of normal-appearing, active toads in 40'r sea water. Muscle inulin spaces in both species are in the range usually reported for amphibian skeletal muscle. There were no statistically significant variations in muscle inulin spaces in differently adapted animals in either species. Variability between animals was fairly large, however, so possible small differences may be masked. The results of analyses of plasma and musc
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 224 M \LCOLM S. GORDON horcas, after three days in 50% sea water, were insignificantly different from those of normal-appearing, active toads in 40'r sea water. Muscle inulin spaces in both species are in the range usually reported for amphibian skeletal muscle. There were no statistically significant variations in muscle inulin spaces in differently adapted animals in either species. Variability between animals was fairly large, however, so possible small differences may be masked. The results of analyses of plasma and muscle samples taken from variously adapted />'. I'iridis and /->'. horcas are presented in Tallies III and IV. These basic data have been combined with the muscle inulin space data of Table II to yield otimates of intracellular concentrations in the skeletal muscle fibers of the two toads. These latter estimates are presented in Table V. Figures 1 and 2 compare the major features of these sets of data. Both forms maintain osmotic concentrations of the plasma at levels higher than medium concentrations until maximum salinity tolerances are reached. Increases in plasma concentrations above those characteristic of fresh water are due primarily to XaCl (S6rv of the increase in A'. I'iridis between fresh water and 50% sea water: lOy/ of the increase in B. borcas between fresh water and 40% sea water— 500 in Q) O E c. O c <u CJ c. O O 400^ 300^ 200 - 100 a-NH2N. External Concentration (mOsmoles/l.) —»• KI- 1. \> 1 hut for />';//" /'v</.v. Toads acclimatized to fresh water, 20', and 4ir; sea 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; L
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
