Department of Aquatic Bioscience, Faculty of Agriculture, The University of Tokyo Fish Health Section, Aquaculture Division, Bureau of Fisheries and Aquatic Resources, Depart ment of Agriculture
小川 和夫
Department of Aquatic Bioscience, Faculty of Agriculture, The University of Tokyo
良永 知義
National Research Institute for Fishery Science
若林 久嗣
Department of Aquatic Bioscience, Faculty of Agriculture, The University of Tokyo