The decision to not retain Heman as Taronga’s breeding bull was an interesting decision. Protected contact would not have really made any difference as Gung was the same. Heman never breed, despite being around four females that he could have breed with during the 1960’s. He was proven fertile, so it may have been the fact that he didn’t know how to mate the females naturally like Bong Su at Melbourne. Even if this was the case, he should have been kept and retained for AI.
Burma wasn’t that compatible and had some behavioural tendencies so that, alongside space issues was why Taronga decided to send her to Western Plains. It might be possible that Heman was sent there as her companion.
Theoretically, if Heman was able to naturally mate the females, he should have been retained by Taronga for about five years. In this time, Gung could have been sent to Western Plains were he could develop before they could be swapped in about five years time. This would have many added benefits, adding Heman’s genetics to the region and allowing Pak Boon and Porntip to mate naturally earlier, as Gung wasn’t able to mount them because he was too small.