The animals, which are endangered in the wild, are part of a European breeding programme.
The animals at Marwell, including the cubs' parents, Irina and Indeever, are part of a European breeding programme.
Richard Hampshire, warden at Top Hill Low Nature Reserve, said the winter had set back the breeding programme.
The zoo runs the European breeding programme for white-collared lemurs and is home to 10 of Europe's 14 animals.
It had been hoped the female would take part in a breeding programme with several other coatis recently imported.
Dr Rex Brennan, who leads the blackcurrant breeding programme, said the conference was a great opportunity to promote the industry.
The mammals will now be flown back to Vietnam as part of its own breeding programme to protect the species.
Daley and Rebecca will take part in a breeding programme to provide an important safety net to populations in the wild.
Caspian enthusiasts from 20 countries met for the first time at the conference and discussed ways of implementing the breeding programme further.
BBC: NEWS | UK | England | Leicestershire | How DNA saved an 'extinct' breed
Nipper, who was named by children at Liff Primary School on the outskirts of Dundee, was born as a result of Tayside's Dog Breeding Programme.
When mature, the pair will join the zoo's European breeding programme.
Prince Philip is said to be a fan of the sturdy breed with two of his animals, a gift from the Shah of Iran, having a fundamental place in the breeding programme.
BBC: NEWS | UK | England | Leicestershire | How DNA saved an 'extinct' breed
Sightings of these animals, much bigger and stockier than domestic cats, were becoming less frequent - and a breeding programme was urgently needed to prevent them from completely disappearing, Dr O'Donoghue added.
In the 1990s, the first white rhinos were imported from South Africa and the results of the breeding programme saw the animals transferred to other reserves in Kenya, including Lake Nakuru National Park, Sweetwaters Game Reserve and Lewa Downs Conservancy.
The corgi, which died at a breeding farm, will be prepared for consumption on the Bob and Roberta Smith radio programme broadcast on the London-based arts station 104.4 Resonance FM.
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