Scaling of blood parameters in mammals

Abstract 1. 1. Values for blood plasma and red cell volumes, as well as hematocrit and half-saturation (T 50 ) values in male and female mammals, both aquatic and terrestrial, are submitted to linear (log-log) regression analysis. 2. 2. The slope of the regression lines for blood and plasma volumes is identically one. The slope (0.97) of the red cell regression is probably not significantly different from one ( df = 71, t = 2, P 3. 3. The slope (− 0.01) of the hematocrit regression line is, statistically speaking, different from zero ( df = 87, t = 4.7, P 4. 4. The slope (− 0.03) of the half-saturations ( T 50 ) values is also, statistically, different from zero ( df = 89, t = 4.1, P 5. 5. No statistically significant differences were found in any of the above blood parameters as between either male and female animals or aquatic and terrestrial mammals.