Bhopal, Jan 27: Epizootic Ulcerative Syndrome (EUS) is a dreaded disorder of fishes which inflicts heavy losses to the fishery industry. Since about two decades, it has been the observation that three things come together at Bhopal during winter season. They are cold weather, migratory birds, and EUS in fishes. It is observed that there is some inter-relation among these three events.