Scientists, politicians and wildlife groups are pushing for moves to restrict the sale of bluefin tuna. Campaigners will call for trade restrictions at the next meeting of Cities, the Convention on International Trade in Endangered Species. Bluefin tuna is very popular particularly in Japan where it is used for sushi and can often sell for thousands of pounds. Stocks of the fish, however, have dropped by 82% since 1978 in the western Atlantic and those in the eastern Atlantic have dropped by 80% in the same period. The fish is currently being fished faster than the total population can replenish its numbers so if nothing is done it appears the collapse of the species is inevitable. As the world’s main purchaser of the fish Japan are likely to oppose any restrictions.