I hope you enjoy the behind the scenes experience and of course, any information you can find out regarding elephant breeding would be appreciated. I’d be particularly interested to know (assuming the plan is to breed from Putra Mas and Pak Boon), whether they’d consider breeding from them via AI if natural didn’t work (due to the uncertainty around Putra Mas breeding naturally).
Studies have determined fertility in captive female elephants decreases after the age of 50, with some cows theoretically able to breed into their 60’s.
However, to answer your question, cows who have long intervals following a birth (e.g. 10 years plus) are less likely to conceive due to scarring on the reproductive system caused by ovulation cycles. This is the reason it’s preferable to breed from cows (which can begin cycling as young as four years old) before they reach their early 20’s. In Burma and Permai’s case, they’re 42 and 35 years old and have never bred, so would be considered non-viable breeders. Combined with the fact that first time births in elephants have a high mortality rate, it would not be advisable to subject a geriatric animal to this process from a welfare perspective. There’d be a reasonable chance they could lose both mother and calf.
Tang Mo is younger at 25 years, but when when I visited in November, her keeper told me the Berlin team had carried out investigations and deemed her non-viable for breeding.
With the above in mind, Pak Boon is the only realistic hope amongst the cows for establishing a breeding herd at Monarto.