Experts warn that stocks of bluefin tuna, a fish commonly used in sushi dishes, have dropped. Studies indicate that the breeding stock of tuna in the Pacific, which was estimated at 130,000 tons around 1960, dropped to 23,000 tons as of 2010. A recent report warned this number could fall below 18,000 tons in the near future.

The issue stems from catching young fish before they have the chance to reproduce. More than 90 percent of bluefin tuna caught in the Pacific Ocean are young fish.

Recently, the Western and Central Pacific Fisheries Commission convened for an international conference in Japan. The conference, held to discuss fishing controls on bluefin tuna, was attended by representatives from eight countries, including the United States and South Korea, as well as Taiwan.

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