BRUNSWICK — Georgia’s food-shrimp harvest season will be extended until 6:15 p.m. Jan. 15, Department of Natural Resources Commissioner Mark Williams said. Commercial food-shrimp trawlers may continue to operate in waters eastward of the sound-beach boundary currently open to power-drawn trawls. Commercial and recreational cast-netters, as well as persons using a beach seine, can harvest food shrimp from waters open to the use of these gears.The department typically extends food-shrimp season beyond the Dec. 31 closing date unless environmental conditions, such as abnormally cold weather or lower-than-normal shrimp abundance, makes such an extension unadvisable.