A drop in production of frozen tilapia from China and fresh product from Central America will keep supplies tight for the rest of the year. This could impact prices going forward, said a top executive with one U.S.-based supplier.

China dominates the frozen market in the United States with about 90 percent of the volume, while Indonesia can claim about 8 percent of the U.S. frozen market. But China’s production declined 8 percent in November compared to the same month in 2012, which translate…