Table 2.

Methane emission rates of individual gut sections ofCubitermes orthognatus compared to those of living termitesa

Termite type or sectionCH4emission rate (nmol termite−1h−1)b
AirN2Air + H2N2 + H2N2 + formate
Live1.09 ± 0.111.12 ± 0.138.02 ± 0.098.09 ± 1.16NAc
Md NDe
P10.09 ± 0.010.09 ± 0.010.11 ± 0.010.11 ± 0.020.15
P3/4a0.21 ± 0.040.57 ± 0.131.51 ± 0.092.43 ± 0.724.73
P4b0.02 ± 0.020.09 ± 0.020.13 ± 0.090.47 ± 0.110.51
P50.05 ± 0.01ND
  • a Gut sections were incubated for 1.5 to 2 h and suspended in a shallow layer of BSS. The gas headspace consisted of air or N2, with or without the addition of H2 (20 kPa); formate (5 mM) was added to BSS.

  • b Values are means ± mean deviations of two independent assays.

  • c NA, not applicable.

  • d —, below the detection limit (0.02 nmol termite−1 h−1).

  • e ND, not determined.