Comparative studies of the respiratory functions of mammalian blood. XII. Black galago (Galago crassicaudatus argentatus) and brown galago (Galago crassicaudatus crassicaudatus).
Respiratory characteristics of blood from sixteen adult male galagos were studied (8 brown and 8 black). The average body weight of the black galagos was significantly higher than that of the brown(1.512 +/- 0.162 vs. 0.988 +/- 0.099 kg, respectively). The blood oxygen capacities for black and brown galagos were 20.6 +/- 1.9 and 21.5 +/- 1.8 vol percent, respectively. The Bohr factor for blood from the black galago was -0550 +/- 0.039 (n = 9) and for brown galago blood was -0.523 +/- 0.050 (n = 6). There was no significant (P greater than 0.05) difference in P50 values of blood from the two subspecies of galagos, 36.7 +/- 1.1 vs. 37.7 +/- 0.9 mm Hg for the black and brown, respectively. The Haldane effect for black galago blood was higher than that for brown (7.5 vs. 65 vol percent, respectively). The concentrations of 2.3-DPG were similar in black and brown galago blood, 16.16 +/- 1.52 vs. 16.37 +/- 0.76 mumol/g Hb, respectively. Starch gel electrophoresis showed three major components of hemoglobin from both subspecies. There is a trend toward decreasing blood oxygen affinity as one ascends the primate evolutionary scale, which may be secondary to the trend toward a greater adult body weight.
D000818:Animals; D005701:Galago / Q000097:blood*; D006454:Hemoglobins / Q000032:analysis; D008297:Male; D010100:Oxygen / Q000097:blood; D012119:Respiration
D006454:Hemoglobins; D010100:Oxygen