Age-dependent conditioned responses to queen pheromone in Apis mellifera carnica Pollm. workers from queenless colony treated with synthetic queen mandibular pheromone ; Skirtingo amžiaus darbininkių iš Apis mellifera carnica Pollm. šeimos, turinčių vietoj motinos sintetinį motinos mandibulių feromoną, reakcijos į bičių motinų ekstraktą

The age-dependent electroantennogram (EAG) and conditioned proboscis extension responses to the full queen extract (QE), at a dose of 10-3 queen equivalent (Qeq), in QMP-treated (QMP+) and untreated (QMP-) workers were investigated. Our results revealed a great improvement in olfactory leaming of QMP+ workers during the first 10 days of adult life. We found that learning capability developed differently in workers from OMP+ and QMP- colonies. In general, conditioned responses of QMP- workers to QE were lower than those of QMP+ workers but significant differences in conditioned response levels in QMP+ and QMP- workers were recorded on day 8 and 10 of their adult life. No significant differences were revealed between EAG responses of QMP+ and QMP- workers of the same age.