The Virginia Aquarium & Marine Science Center says 52 bottlenose dolphin strandings have happened in the last six months, compared to 86 during the same period in 2013. Virginia recorded some 350 bottlenose dolphin deaths in 2013.Aquarium officials said this year’s figures are encouraging.The National Oceanic and Atmospheric Administration Fisheries website says bottlenose dolphins have been stranding from New York to Florida at elevated rates since July 2013.