It's very sad news and a great loss to the chimpanzee troop. I hope they manage to breed with the chimps soon considering they are down to six again. Perhaps another import of a breeding age female is needed from either Taronga Zoo or Wellington Zoo since Sanda is really their only chance of having offspring.
Does anyone know how old Sanda is? I've heard she's in her early twenties but I'm not totally sure on that.
Sanda is born in September 1985, she is still the best breeding hope for the group and has a good relationship with both Lucifer and Luka. I believe the best course of action would be to import at least two young females (8 years of age). They will stand a good chance of breeding with the males down the line and will be more likely to not upset the older females, like Fimi's arrival did. Staff have advised it has been difficult to source these females in Australsia so a European search may have to be undertaken...of course this costs money.