The red or blue fin tuna (Thunnus nft orientalis), one of the largest and fastest can reach three m

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The red or blue fin tuna (Thunnus nft orientalis), one of the largest and fastest can reach three meters and weigh over 450 kilos. Spawn in Japan and crossing the North Pacific Ocean to reach the coasts of California and the tip of the Baja California peninsula, Mexico. Research A team of scientists from Stanford University, presented an international study published in the journal Proceedings of the Academy of Sciences USA (PNAS) on radioactive Cesium 134 pollutants and 137 on the surface and subsurface waters, well as zooplankton and fish species, from nuclear power plants in Fukushima Dai-ichi, Japan. It is the first time we know that this huge migratory fish transported radioactivity at that distance: 9. 656 miles. The study area in the North Pacific Ocean covered an area of 150,000 km2. The contamination nft occurred because the water used to cool the reactors, he escaped from the buildings and spilled directly on the coast, producing pollution peaked in early April 2011, more than 50 million times levels which pre-exists in the ocean of Cs137. Five months after the Fukushima disaster, Fisher, Stony Brook University in New York and a team of researchers decided to examine the bluefin tuna caught off the coast of San Diego. To his surprise, the tissue samples of 15 tuna fish contained levels of two radioactive substances cesium-134 and cesium-137 - that were higher than in earlier, exceeding three percent natural levels. The researchers explained that tuna can metabolize and expel radioactive substances, nft as they grow and swim from one place to another, but can not expel them completely. To rule out the possibility that the radiation was carried by ocean currents or deposited in the sea through the atmosphere, the team also analyzed yellowfin tuna found in the eastern Pacific bluefin migrated to waters off Southern California before the nuclear crisis. Cesium-134 has detected an average life of two years and the results "were unequivocal, Fukushima was the source," said Ken Buesseler of Woods Hole Oceanographic Institution, who was not involved in the research. Before the accident, no traces were recorded in cesio134 copies tuna coming to U.S. shores. Therefore, "the study this year will feature a larger fish, ages and sample sizes," said marine ecologist at Stanford University, Dan Madigan. Food According to the Stanford research team, led by Daniel Madigan, the values measured in the tuna are below the limit of 100 becquerels per kilogram of fish set by the Japanese government. (Or Becquerel Becquerel is a unit of measurement of radioactivity of the International System, symbol Bq, equal to the activity nft of a radioactive source in which manufacturing or nuclear disintegration per second is produced). The Marc-Oliver Aust scientist, Institute of Fisheries Ecology of Hamburg, said that the burden of cesium as the U.S. is not a danger to humans. The Japanese government said it needs more information before of discussing possible international control of radioactive fish products, after the discovery of contaminated tuna in the southern California nft coast. Chief Cabinet Secretary of the Japanese government, Osamu Fujimura said the government will conduct its own monitoring information collected while. "Still have not reviewed all the research of this migrant tuna found on the southern coast of California. Apparently we will have to address the issue of international monitoring of supplies fish products but need to gather more information before determining how we will handle the matter. " Scientists speculate that turtles, sharks and seabirds may also radioactive ions and transported through different areas of the Pacific Ocean. by Norberto Ovando, president of the Association of Friends of the National Parks (AAPN). Expert World Commission on Protected Areas (IUCN-WCPA). Latin American Network of Protected nft Areas (RELAP), especially for AIM. Source: nft AIM Digital
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