Figure 1.

Schematic setup for bioassays testing the choice of termites between a standard 160 mm×20 mm×20 mm block of wood and another test block. Treatments 4–7 were designed to match the fundamental frequency and the mass of the paired 160 mm×20 mm×20 mm block as indicated. Each central cell contained 15 worker termites. There were 12 replicates for each treatment.