Meanwhile, carry on the animal behavior test, including Open Field behavior, Hole-board test, Tail Flick Latency (TFL) test and Step-down test to discover the gene function on the whole animal level.

The more open country of the Gombe Stream Reserve is ideal for field study, though the behavior of apes living there might not be the same as that of apes in the dense forests.

Electronic animal scale was used to weigh the rats; open-field test was applied to evaluate behavior of the rats.