What is actually stopping a european zoo importing some captive babirusa or gaur from Asia? Have the Bornean/ Visayan Warty Pigs been breeding in Europe for years or are these fairly recent imports?
Or is your point more that all zoos, globally, should give all their species over to global managment programs to stop some institutions holding onto and 'wasting' the genes of their valuable animals?
My point is both
F.i. the babirusa EEP is trying to import new captive-born babirusa from known wild-caught founders ex Indonesia. However, the red tape and paperwork is usually holding up a swift transaction (even within Europe itself). Only if zoos make partnerships with in-situ programmes and operate as a consortium does this bear fruit.
My second point is that we can not deny the fact that f.i. all captive douc langurs are part of worldwide "meta" population that needs all the genetic input available in captivity for the survival of the species both in captivity and in the wild. The world zoo organisation WAZA is committed to having all regional zoo organisations (be they EEP, ALPZA in South America or the Thailand Zoo Organisation) to work to work towards the goal of cooperative meta population management of endangered taxa and support of in situ conservation through technical input, financial support and making available zoological and management expertise for in situ research programmes.