Table 3.

In vitro haematological parameters in whole blood used for oxygen-dissociation curves of fasting and digesting snakes (Python molurus)

ExperimentBefore feeding (0 h)After feeding (48 h)Control (0 h)Control (48 h)
Hct (%)19.2±0.8 (9)16.6±0.8 (9)*21.8±0.7 (5)16.6±2.4 (4)
[Hb4] (mmol l-1)0.93±0.04 (9)0.74±0.03 (9)*1.07±0.05 (5)0.86±0.14 (4)
[Hb4]RBC (mmol l-1)4.83±0.09 (9)4.50±0.15 (9)*4.92±0.14 (5)5.10±0.16 (4)
[NTP]/[Hb4]2.42±0.15 (9)2.21±0.18 (9)*2.60±0.13 (5)2.45±0.12 (4)
  • Data for snakes that were not fed but sampled at a 48 h interval are also included (unfed control).

    Hct, haematocrit; [Hb4], total haemoglobin concentration; [Hb4]RBC, concentration of tetrameric haemoglobin in the red blood cells; [NTP]/[Hb4], relationship between the concentrations of organic phosphates and total haemoglobin. Values are means± S.E.M. (N). * signifies statistical difference between 0 h and 48 h values at P≤0.05.