ing ▁for ▁resources . ▁Such ▁behav iors ▁often ▁involve ▁raising ▁wings ▁and ▁legs ▁towards ▁the ▁oppon ent ▁and ▁attack ing ▁with ▁the ▁whole ▁body . ▁Thus , ▁it ▁often ▁causes ▁wing ▁damage , ▁which ▁reduces ▁their ▁fit ness ▁by ▁removing ▁their ▁ability ▁to ▁fly ▁and ▁mate . ▁ ▁Ac oust ic ▁communication ▁ ▁In ▁order ▁for ▁ag gression ▁to ▁occur , ▁male ▁f lies ▁produce ▁sounds ▁to ▁communicate ▁their ▁intent . ▁A ▁ 2 0 1 7 ▁study ▁found ▁that ▁songs ▁prom oting ▁ag gression ▁contain ▁p uls es ▁occurr ing ▁at ▁longer ▁intervals . ▁R NA ▁sequ encing ▁from ▁fly ▁mut ants ▁displaying ▁over - ag gress ive ▁behav iors ▁found ▁more ▁than ▁ 5 0 ▁aud itory - related ▁gen es ▁( important ▁for ▁trans ient ▁re ceptor ▁potential s , ▁Ca 2 + ▁signal ing , ▁and ▁mechan ore ceptor ▁potential s ) ▁to ▁be ▁up reg ulated ▁in ▁the ▁AB ▁neur ons ▁located ▁in ▁John ston ' s ▁organ . ▁In ▁addition , ▁ag gression ▁levels ▁were ▁reduced ▁when ▁these ▁gen es ▁were ▁knock ed ▁out ▁via ▁R NA ▁inter ference . ▁This ▁sign ifies ▁the ▁major ▁role ▁of ▁hearing ▁as ▁a ▁sens ory ▁mod ality ▁in ▁communic ating ▁ag gression . ▁ ▁Ph er om one ▁signal ing ▁ ▁Other ▁than ▁hearing , ▁another ▁sens ory ▁mod ality ▁that ▁regul ates ▁ag gression ▁is ▁ph er om one ▁signal ing , ▁which ▁oper ates ▁through ▁either ▁the ▁ol factory ▁system ▁or ▁the ▁g ust atory ▁system ▁depending ▁on