I do see your reasoning - put plainly you don’t see the point in risking one of the last viable females in the region with Otana.
To be fair, none of us really know the exact situation and there are a few facts at hand that we can base our assumptions on. That is that Melbourne have had the opportunity to breed/import yet haven't for some reason or another. Otana seems to be the simplest explanation for both for reasons previously stated.
I also don’t see why Taronga would be willing to offload their only viable female when they won’t likely get Kanzi in return. No breeding at Taronga will occur anyway until the young males are moved out and at the present time there’s not an obvious facility regionally that will take them on which is a slight concern.
Exactly!.
Taronga need to either build the gorilla forrest they were planning with two exhibits that can hold the boys and any other bachelor males born. Or they could invest in building an island type exhibit for them out at western plains zoo. It doesn't need to be a fancy/expensive exhibit to start. But just having them out there would greatly enhance western plains zoo as well as very soon they will have no great apes.