. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 8 L. IRVING, E. C. BLACK AND V. SAFFORD of mixed blood from two brown trout was examined over the range of oxygen pressures at 30°. Considering that there are individual varia- tions and that the construction of a number of complete curves for each species at each temperature is not practical, it may be said that these are representative curves, and that one family of similar curves depicts the oxygen affinity of the blood of all three species at various temperatures. In the gills of trout, loading naturally occurs with tens
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 8 L. IRVING, E. C. BLACK AND V. SAFFORD of mixed blood from two brown trout was examined over the range of oxygen pressures at 30°. Considering that there are individual varia- tions and that the construction of a number of complete curves for each species at each temperature is not practical, it may be said that these are representative curves, and that one family of similar curves depicts the oxygen affinity of the blood of all three species at various temperatures. In the gills of trout, loading naturally occurs with tensions of CO., 60 <N O 50 .0 I O 40 to (T O 30 CM O Q. 20 10 BROOK TROUT. 10 15 20 25 30 TEMPERATURE FIG. 4. The effect of temperature upon the pressure of oxygen necessary to half- saturate blood of brook trout at CO2 tensions 1 and 10 mm. in the water which are less than 2 mm. (Ferguson and Black, 1940). In the arterial blood of rainbow trout the tension of CO2 is about as low, and so the curves represent the condition of the blood when loading with oxygen occurs in the gills. At 30° the blood could not be satu- rated with the oxygen pressure of the air, but at 25° the hemoglobin could reach its full saturation. At temperatures above 15° it is easy to see that the curves are ^-shaped. At lower temperatures the deviation is too small to be dem-. 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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