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Page last updated at 10:38 GMT, Wednesday, 24 March 2010

Should all species be protected?

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Asian countries have blocked an attempt by the United States to ban the trade of Atlantic bluefin tuna at a Convention on International Trade in Endangered Species in Qatar. Colin Butfield, head of campaigns at the WWF, and Hugh Possingham, Professor of Ecology at the University of Queensland, consider the threat to bluefin tuna.

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