PREMIUM -- Ratna, a twenty-three -week old Sumatran tiger cub, born at Dublin Zoo, taking exercise in the main enclosure, Wednesday November 12, 2003. Between 400-500 Sumatran tigers remain in the wild, due to the effects of deforestation and poaching. Dublin Zoo is a participant in the European Association of Zoos and Aquaria Tiger Campaign for the preservation of tigers in the wild and is hoping to raise 50,000 Euros. PA Photo: Haydn West