The appearance of imported water buffalo meat on U.S. retail shelves has alarmed U.S. bison producers, who worry the product isn’t being inspected or properly labeled. The National Bison Association has requested an investigation by the U.S. Food and Drug Administration after discovering Australian water buffalo meat sold simply as “wild ground buffalo” through a 200-store grocery chain along the East Coast.In North America, the word “buffalo” commonly conjures up images of native bison roaming the prairies, not foreign livestock, said Dave Carter, the NBA’s executive director.The mislabeling problem is worrisome for the bison industry because there are only about 400,000 native bison in the U.S. and Canada, compared to nearly 100 million water buffalo in India alone, Carter said.