I guess this shows the magnitude of the poaching problem…. The selection pressure from poaching >> the loss of viable male offspring (for overall population success). Half of the males still make it through and no amount of elephant testosterone is effective vs poachers.
“ However, it is not all good news. The trait is only seen in female elephants and researchers said that genetic sequencing shows that the trait is linked to a mutation in the X chromosome, which can be fatal to male elephants in the womb.”