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BP oil spill update: Dolphins with missing teeth and lung disease found in Gulf of Mexico
rawstory.com Bottlenose dolphins with missing teeth, lung disease, and abnormal hormone levels were found swimming in the Gulf of Mexico a year after the BP oil spill, US researchers say. Pneumonia, liver disease and a pregnant female carrying a dead fetus were also reported in the first major study of dolphin health after the 2010 Deepwater Horizon oil rig explosion that spilled 4.9 million barrels of oil into the Gulf of Mexico. Half of the 32 dolphins studied off the coast of Louisiana in August 2011 -- a year and four months after the worst oil spill in US history began -- were judged to be seriously ill or in danger of dying. "I've never seen such a high prevalence of very sick animals," said lead author Lori Schwacke, a researcher with the National Oceanic and Atmospheric Administration (NOAA). The wild dolphins were captured in the central Louisiana waters and held briefly for health checks before being released. "There is disease in any wild population. We just haven't seen animals that were in such bad shape as what we saw in Barataria Bay," she said. Two Risso's dolphins are herded by fishing boats, 23 November 2003, near the village of Taiji, central Japan Their health was compared to 27 bottlenose dolphins in Sarasota Bay, Florida, an area also in the Gulf that was unaffected by the oil spill. The Barataria Bay dolphins had significantly lower levels of adrenal hormones, which are critical to an animal's stress response. Moderate to severe lung disease was five times more common in the Louisiana dolphins than in their Floridian counterparts. Three of the Barataria Bay dolphins had also lost nearly all their teeth, and three others had just half of their normal number of teeth left. Dolphins typically have between 78 and 106 teeth. "There were several dolphins that were in such bad shape that the veterinarians that examined them did not expect them to live very long," said Schwacke, an expert on dolphins in the southern United States. Dolphins that were studied also suffered from pneumonia, anemia, low blood sugar, and elevated liver enzymes. BP SAYS OIL NOT THE CAUSE Oil giant BP said the report, which appeared in December in the journal Environmental Science and Technology, was "inconclusive as to any causation associated with the spill." to read more: rawstory.com
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