. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 218 EDGAR C. BLACK By oxygen capacity is meant the amount of oxygen (expressed as vol- umes per cent) combined with hemoglobin of whole blood when the pressure of oxygen is 153 mm. (that of air) and when the pressure of CO2, as shown by analysis of the gas phase, is less than 2 mm. Hg. Individuals of all four species showed considerable variation in the oxygen capacity. The differences in the mean values for the four species as compared with the individual variations are small and hence the differences in the mean values are
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 218 EDGAR C. BLACK By oxygen capacity is meant the amount of oxygen (expressed as vol- umes per cent) combined with hemoglobin of whole blood when the pressure of oxygen is 153 mm. (that of air) and when the pressure of CO2, as shown by analysis of the gas phase, is less than 2 mm. Hg. Individuals of all four species showed considerable variation in the oxygen capacity. The differences in the mean values for the four species as compared with the individual variations are small and hence the differences in the mean values are of no apparent significance. In comparing the oxygen capacities listed in Table I with the oxygen capacities of various animals compiled by Redfield (1933), the average value for the catfish, carp, bowfin and common sucker is higher than that for most marine fish but is well below the average for mammals. /Mr. FIG. 1. Oxygen dissociation curves for the blood of the catfish, carp, bowfin and common sucker at pCO2 0-2 mm. It is of some interest to note that the mean oxygen capacity for the bowfin, a ganoid, is about equal to the average of the bony fishes while it is twice that found for elasmobranchs by Dill, Edwards and Florkin (1932) and Ferguson, Horvath and Pappenheimer (1938). Table I also gives the relation of oxygen capacity to red cell volume. Since red cell volume in any one sample of blood varied as a result of conditions not as yet completely investigated, little significance is attached to the values given. The Combination of Oxygen with Blood Oxygen Dissociation Curves in the Absence of COz.—Because of the metabolism of the nucleated erythrocytes in fish blood it is difficult to obtain oxygen dissociation data in the complete absence of CO2. In-. 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
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
