Table 4.

Calling and resting metabolism in S. borellii and S. vicinus

Metabolic power Efficiency (%)
ConditionSpeciesMass (g)O2 (μl O2 g-1 h-1)CO2 (μl CO2 g h-1)RQ(mW g-1)(mW)Net cost (PcallPrest)Metabolic scope (Pcall/Prest)Acoustic power (mW)(Pac/Pcall)(Pac/Pcall-net)
RestS. borellii (N=6)0.863±0.120241±20227±370.96±0.141.4±0.11.2±0.1
S. vicinus (N=6)0.978±0.008288±37290±221.05±0.101.7±0.21.6±0.1
P 0.390.260.160.720.660.04
CallingS. borellii (N=7)0.826±0.0712098±1561804±720.84±0.0711.6±0.89.4±0.510.2 (8.3×Prest)8.2 (7.8×Prest)0.0212±0.00240.23±0.020.026±0.02
S. vicinus (N=5)1.075±0.0061387±1621297±800.86±0.119.0±0.59.6±0.67.3 (5.3×Prest)7.0 (6.0×Prest)0.0029±0.00140.03±0.010.04±0.02
P 0.020.010.010.960.020.91<0.001<0.001<0.001
  • Metabolic power was calculated from CO2. The net cost of calling was estimated as PcallPrest.