. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 28 H. H. ROSTORFER AND R. H. RIGDON tween the dissociation curves for young and adult ducks. The blood of the adult birds gave a typical sigmoid curve while that of the young ducklings had a greater oxygen uptake at lower oxygen tensions than would be indicated by calculation from points of equilibrium at higher oxygen tensions. However, the deviation was slight. Bloods of young and adult chickens were investigated in similar manner. Fig- ure 3 compares the oxygen dissociation curves of adult ducks and chickens. There was a
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 28 H. H. ROSTORFER AND R. H. RIGDON tween the dissociation curves for young and adult ducks. The blood of the adult birds gave a typical sigmoid curve while that of the young ducklings had a greater oxygen uptake at lower oxygen tensions than would be indicated by calculation from points of equilibrium at higher oxygen tensions. However, the deviation was slight. Bloods of young and adult chickens were investigated in similar manner. Fig- ure 3 compares the oxygen dissociation curves of adult ducks and chickens. There was a considerable difference between the oxygen uptake of the blood of the 100 I- a: D !< 60 CO I- LJ u a: 40 20 _ ADULT DUCK CHICKEN. I 20 40 60 80 OXYGEN TENSION FIGURE 3 compares the oxygen dissociation curves for the adult duck and chicken at a CO, tension of 31 mm. Hg. adult duck and the adult chicken at various oxygen tensions. The adult duck blood had about the same percentage of saturation at ordinary oxygen tensions but was capable of carrying a larger amount of oxygen than chick blood at low oxygen tensions. Figure 4 compares the dissociation curves of the blood of the adult and of the young chicken. Although the curve for the blood of the young chick represents the data obtained from one sample of pooled blood only, it is reasonable to assume that it is representative. In general, the blood of the young chick appeared to have a greater percentage of saturation at all levels of oxygen tension than the blood of the adult chicken. In contrast to the blood of the adult duck, the blood of the young chick had a higher percentage of oxygen saturation at higher oxygen tens'ons but a slightly lower per cent of saturation at low oxygen tensions. In general, the blood of the duck in comparison to chicken blood had greater oxygen capacity, contained more functional hemoglobin, and showed less dis-. Please note that these images are extracted from scanned page images that
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