An international conservation commission has issued a report projecting that the total allowable catch for bluefin tuna in the eastern Atlantic Ocean and the Mediterranean Sea could be raised by 50 percent from the current level by 2020, a Japanese government agency said Thursday.Taking the estimate as a sign of improving stocks of the fish, which has been threatened by overfishing, Japan plans to ask for an increased national quota at a regular meeting of the International Commission for the Conservation of Atlantic Tunas to be held in Morocco in November, Japan's Fisheries Agency said.The…READ FULL ARTICLE