▁insert ▁a ▁gene ▁in ▁female ▁to ads ▁which ▁would ▁allow ▁them ▁to ▁only ▁create ▁male ▁off spring . ▁In ▁theory , ▁this ▁would ▁limit ▁the ▁re product ive ▁rates ▁and ▁control ▁the ▁population . ▁It ▁is ▁difficult ▁to ▁determine ▁the ▁effic acy ▁and ▁d angers ▁of ▁these ▁approaches , ▁as ▁these ▁methods ▁have ▁never ▁been ▁attempted , ▁especially ▁on ▁a ▁large ▁scale . ▁ ▁On ▁ 1 3 ▁June ▁ 2 0 1 2 ▁news ▁reports ▁c ited ▁a ▁new ▁research ▁break through ▁regarding ▁can e ▁to ad ▁control . ▁Research ▁has ▁confirmed ▁that ▁can e ▁to ad ▁t ad pol es ▁are ▁attract ed ▁to ▁the ▁to x in ▁produced ▁by ▁adult s ▁and ▁spawn . ▁T ad pol es ▁are ▁believed ▁to ▁can n ib al ize ▁to ad ▁spawn ▁as ▁a ▁food ▁source . ▁Research ers ▁used ▁can e ▁to ad ▁to x in ▁to ▁successfully ▁l ure ▁can e ▁to ad ▁t ad pol es , ▁imp lying ▁that ▁in ▁controlled ▁areas ▁t ad pol es ▁could ▁be ▁captured ▁and ▁er adic ated . ▁ ▁New ▁research ▁has ▁indicated ▁that ▁in ▁semi - ar id ▁areas ▁where ▁water ▁is ▁scar ce ▁the ▁construction ▁of ▁to ad ▁proof ▁f ences ▁around ▁d ams ▁can ▁sever ely ▁affect ▁to ad ▁surv ival ▁rates ▁by ▁den ying ▁their ▁access ▁to ▁water . ▁ ▁The ▁R SP CA ▁has ▁gu idel ines ▁for ▁the ▁hum ane ▁c ull ing ▁of ▁can e ▁to ads . ▁In hum ane ▁ways ▁include ▁sp ray ing