I have to correct that a Little bit-Berlin Zoo had just one Gerenuk in 1930. Next Gerenuks came to Berlin arrived there in 1965, but they were kept only until 1969-no breeding. Frankfurt got again Litocranius walleri walleri in 1956; the last of them died in 1979. But soome sources have doubts if they were really walleri.
It's never to late to learn new things I wonder where the hell you put out these old stuff
During my last visit to the Usa, a nice keeper showed it to me how to transport an adult gerenuk, and this method works very well. Anyway, it is difficult and a high risk, especially for such a Long distance transport to europe-fortuantely, the four Gerenuks arrived safly and healthy at their final Destination.
If it is possible to grow a population out of just two pairs is another question-the adult animals are around ten years old and very Close to death...So that means, if the young pair will breed in the near future, they have to bred also with the offspring-but on the other side, it plays not really a role-the entire Population of that species is completly inbred. I don't think, the new director of Berlin will do another expensive Import of Gerenuks, after they died.
In this case, I got that quote from this very discussion thread
As for how successful this import will be, I honestly have not got a clue - but at the very least it might give European collections a better grasp of the husbandry required for the species, which may or may not be of use in the future.