Out of each batch, 120 larvae of similar size were selected
for use. The average body weight and average body length were
23 ± 4 mg and 10.3 ± 0.8 mm, and 20 ± 4 mg and 10.0 ± 0.8 mm for
the larvae from the control tank and the BFT tank, respectively (further
called “origin of the larvae”). The larvae were subsequently randomly
distributed in 2 L plastic tank