Social preference test. The central cage (A), where the female was located, was connected with the two male cages (B1, B2) by plastic tubes. The tubes were closed at the beginning of the experiment, after acclimatization the barriers were removed (C) to enable females (A) to access the two males’ cages. Males cages were separated into two compartments using perforated plastic dividers (d1, d2), which allowed olfactory, acoustic and visual inspection between sexes, however preventing a mating event. Each male was restrained to only one compartment of their cage (i, ii).