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. 2012 Mar 19;7(3):e33914. doi: 10.1371/journal.pone.0033914

Table 2. Tracheal and air sac volume (Vair) of Scarabaeus sacer and S. cicatricosus.

Scarabaeus sacer Scarabaeus cicatricosus P
Vair (ml) 1.44±0.37 0.14±0.05 <0.01
VT (ml) 11.53±3.43 5.56±0.76 <0.01
%Vair vs. VT 11.66±2.75 2.79±1.46 <0.01
N 11 17

Total body volume (VT) was measured using the function proposed by Radtke and Williamson (2005) based on total body mass.